Abstract

A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement being configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed; configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed; and configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a first valve arrangement comprising a first valve member associated with the first port of the tubular body; and a second valve arrangement comprising a second valve member associated with the second port of the tubular body. The first valve arrangement and the second valve arrangement are configurable to lock in a first configuration with the tubular body, such that the first port is closed and the second port is closed; to lock in a second configuration with the tubular body, such that the first port is open and the second port is closed; and to lock in a third configuration with the tubular body, such that the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a valve member that comprises a first port associated with the first port of the tubular body; and a second port associated with the second port of the tubular body. The valve arrangement is configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed. The valve arrangement is configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed. The valve arrangement is configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A method comprises operating a first valve arrangement and a second valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed. The method comprises operating the first valve arrangement and the second valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open; and moving the first valve arrangement to a third intermediate configuration between a second intermediate configuration and the third configuration, in which the first valve arrangement is locked, the second valve arrangement is locked and the first and second ports are closed.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A downhole apparatus comprises a tubular body having first and second ports in a wall thereof and a first valve arrangement associated with the first port. The downhole apparatus includes a second valve arrangement associated with the second port and a sand control element operable to move between a first deactivated state to a second activated state, wherein the sand control element is in fluid communication with the first port of the tubular body.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A method of operating a valve arrangement of a downhole apparatus (that includes a tubular body having first and second ports in a wall thereof) comprising operating the valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the valve arrangement includes a valve member including a first port, the first port associated with the first port of the tubular body, and a second port associated with the second port of the tubular body, wherein the valve arrangement comprises a further retaining member. The method includes operating the valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A method comprising operating a first valve arrangement and a second valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the first valve arrangement comprises one or more locking devices configured to lock a first valve member of the first valve arrangement in place relative to the tubular body. The method comprising operating the first valve arrangement and the second valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a first valve arrangement associated with the first port and comprising a first valve; and a second valve arrangement associated with the second port comprising a second valve. The valve arrangement is configurable to lock in a first configuration with the tubular body, such that the first port is closed and the second port is closed; lock in a second configuration with the tubular body, such that the first port is open and the second port is closed; and lock in a third configuration with the tubular body, such that the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A method of operating a valve arrangement of a downhole apparatus comprising a tubular body having first and second ports in a wall thereof includes operating the valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the locked first configuration is an initial configuration of the valve arrangement. The method includes operating the valve arrangement from tile locked second configuration to a third configuration, in which the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement being configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed; configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed; and configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

There is provided a sandscreen joint (110) capable of providing zonal isolation. The ends of the portion of the (110) are capable of extension on activation of the sandscreen (110), including transition areas (135), which are coated with an elastomer sleeve (134). On activation of the sandscreen (110), the sleeve (134) is pushed out into contact with the bore wall and serves to isolate the zone on one side of the activated sleeve (134) from the zone on the other side of the sleeve (134). Thus, the provision of the sleeve (134) on the activated sandscreen (110) may prevent fluid from flowing axially along the bore between the bore wall and sandscreen. This may serve to protect the weave at the transition area (135), preventing axial flow through the transition areas (135).

IPC Classes  ?

• E21B 43/08 - Screens or liners
• E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 33/14 - Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
• E21B 34/06 - Valve arrangements for boreholes or wells in wells

Abstract

The present invention relates to a downhole apparatus and a valve arrangement for a downhole apparatus having a tubular body having first and second ports in a wall thereof; and a method of operating a valve arrangement of a downhole apparatus. The valve arrangement has at least one locked configuration and the first port provides fluid communication with a tool or a device which is a sand control element having at least one fluid deformable device. The present invention also provides a method of setting a sand control completion, extending the sand control filter element thereof to a wellbore surface and isolating the reservoir from an upper portion of the wellbore.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

This disclosure may generally relate to drilling operations and, more particularly, to systems and methods for cleaning a drilling fluid as it travels back to the surface from a wellbore. An apparatus may comprise a magnetic body (208) having a longitudinal axis (500). The magnetic body may comprise a pair of end plates (502) that are spaced along the longitudinal axis and a magnetic unit (504) disposed between the pair of end plates (502), wherein the magnetic unit (504) is operable to generate a magnetic field. The apparatus may additionally comprise an axle (501) disposed along a longitudinal axis of the magnetic body, wherein the axle is operable to rotate the magnetic body about the longitudinal axis.

IPC Classes  ?

• E21B 21/06 - Arrangements for treating drilling fluids outside the borehole
• B03C 1/28 - Magnetic plugs and dipsticks

Abstract

A downhole apparatus including a tubular body, first and second ports in a wall of the body, and a fluid pressure-responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port is open and the second port is closed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port is open and the second port is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port is open and the first port is closed.

IPC Classes  ?

• E21B 43/10 - Setting of casings, screens or liners in wells
• G06F 3/044 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
• E21B 43/08 - Screens or liners
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
• E21B 23/04 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
• E21B 33/12 - PackersPlugs
• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• G06F 3/047 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
• H03K 17/96 - Touch switches

Abstract

The present invention relates to a downhole apparatus and a valve arrangement for a downhole apparatus having a tubular body having first and second ports in a wall thereof; and a method of operating a valve arrangement of a downhole apparatus. The valve arrangement has at least one locked configuration and the first port provides fluid communication with a tool or a device which is a sand control element having at least one fluid deformable device. The present invention also provides a method of setting a sand control completion, extending the sand control filter element thereof to a wellbore surface and isolating the reservoir from an upper portion of the wellbore.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

ABSTRACT The present invention relates to a downhole apparatus and a valve arrangement for a downhole apparatus having a tubular body having first andsecond ports in a wall thereof; and a method of operating a valve arrangement of adownhole apparatus. The valve arrangement has at least one locked configuration and the first port provides fluid communication with a tool or a device which is a sand control element having at least one fluid deformable device. The present invention also provides a method of setting a sand control completion, extending the sandcontrol filter element thereof to a wellbore surface and isolating the reservoir from anupper portion of the wellbore.Date Recue/Date Received 2020-09-25

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

The present invention relates to a downhole apparatus comprising a tubular body. The tubular body has first and second ports in a wall thereof; a first valve arrangement associated with the first port; a second valve arrangement associated with the second port; and a sand control element, the sand control element being operable to move between a first deactivated state to a second activated state. The sand control element is in fluid communication with the first port of the tubular body. The present invention also provides a method of operating a downhole apparatus comprising a tubular body having first and second ports in a wall thereof. The method includes operating a first valve arrangement to move a sand control element from a first position to a second position; and operating a second valve arrangement to open a second port of the tubular body.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

The present invention relates to a downhole apparatus and a valve arrangement for a downhole apparatus having a tubular body having first and second ports in a wall thereof; and a method of operating a valve arrangement of a downhole apparatus. The valve arrangement has at least one locked configuration and the first port provides fluid communication with a tool or a device which is a sand control element having at least one fluid deformable device. The present invention also provides a method of setting a sand control completion, extending the sand control filter element thereof to a wellbore surface and isolating the reservoir from an upper portion of the wellbore.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

A method of injecting fluid into a formation, comprises exerting a mechanical force on a wall of a bore extending through a formation to modify the permeability of the formation; and injecting fluid into the modified formation. The mechanical force is exerted through inflation of at least one pressure deformable member mounted on a base member with a retaining ring.

IPC Classes  ?

• E21B 43/04 - Gravelling of wells
• E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 43/02 - Subsoil filtering
• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures
• E21B 34/06 - Valve arrangements for boreholes or wells in wells
• E21B 43/20 - Displacing by water
• E21B 43/24 - Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
• E21B 43/25 - Methods for stimulating production
• E21B 43/267 - Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping

Abstract

A sandscreen joint is capable of providing zonal isolation. The ends of a portion of the sandscreen are capable of extension on activation of the sandscreen, including transition areas, which are coated with an elastomer sleeve. On activation of the sandscreen, the sleeve is pushed out into contact with the bore wall and serves to isolate the zone on one side of the activated sleeve from the zone on the other side of the sleeve. Thus, the sleeve on the activated sandscreen may prevent fluid from flowing axially along the bore between the bore wall and sandscreen. This may protect the weave at the transition area, preventing axial flow through the transition areas.

IPC Classes  ?

• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 33/14 - Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
• E21B 34/06 - Valve arrangements for boreholes or wells in wells

Abstract

A tubular has a retracted configuration and an extended configuration. The tubular is initially in the retracted configuration and run into a bore at least partially lined with filter cake. The tubular is extended such that a filter cake-disrupting member mounted on the tubular defines high points or otherwise has an outer surface of varying radial extent for disrupting or disturbing the filter cake.

IPC Classes  ?

• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 37/02 - Scrapers specially adapted therefor
• E21B 33/12 - PackersPlugs
• E21B 37/06 - Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting the deposition of paraffins or like substances
• E21B 43/08 - Screens or liners
• E21B 21/00 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

Abstract

A method of injecting fluid into a formation, comprises exerting a mechanical force on a wall of a bore extending through a formation to modify the permeability of the formation; and injecting fluid into the modified formation. The mechanical force may be exerted through inflation of at least one pressure deformable member mounted on a base member. The base member may be a base pipe. The pressure deformable member may be a hollow or tubular member mounted externally of the base pipe.

IPC Classes  ?

• E21B 43/04 - Gravelling of wells
• E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 43/02 - Subsoil filtering
• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures
• E21B 34/06 - Valve arrangements for boreholes or wells in wells
• E21B 43/20 - Displacing by water
• E21B 43/24 - Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
• E21B 43/25 - Methods for stimulating production
• E21B 43/267 - Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping

Abstract

Methods of monitoring a force applied to a component (28) in a wellbore (12) following drilling and during a subsequent operation. Methods comprising: providing a string of tubing (35) including a tubular member (46) having at least one sensor (48) for measuring the strain in the tubing, and a device (50) for transmitting data to surface and which is operatively associated with the sensor. Running the string of tubing into the wellbore; monitoring the strain in the tubing measured by the sensor and compensating for the strain. Performing an operation in the well employing the tubing, involving the application of a force to the component in the wellbore; monitoring the resultant change in strain in the tubing measured by the sensor; and transmitting data relating to the resultant change in strain to surface using the data transmission device, to facilitate determination of the force applied to the component.

IPC Classes  ?

• E21B 47/00 - Survey of boreholes or wells
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

An example method includes introducing a string of tubing into a wellbore to perform a primary operation, the string of tubing including at least one sensor for measuring strain and at least one device operatively associated with the at least one sensor. The method further includes translating the string of tubing relative to the wellbore, imparting a load on the string of tubing when the tubing becomes stuck in the wellbore at a stuck point, and thereby generating strain in the string of tubing above the stuck point. Additionally, the method includes measuring the strain with the at least one sensor, transmitting data indicative of the strain to a surface location with the at least one device, and determining a position of the at least one sensor in the wellbore, as based on the strain, relative to the stuck point.

IPC Classes  ?

• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
• E21B 47/00 - Survey of boreholes or wells
• E21B 23/01 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
• E21B 29/00 - Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windowsDeforming of pipes in boreholes or wellsReconditioning of well casings while in the ground
• E21B 31/20 - Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
• E21B 29/02 - Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windowsDeforming of pipes in boreholes or wellsReconditioning of well casings while in the ground by explosives or by thermal or chemical means
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

A method for obtaining real-time data relating to a well construction activity includes locating wellbore-lining tubing comprising at least one non-magnetic tubing section in a wellbore of a well. At least one downhole parameter is measured at a location external of the wellbore-lining tubing using at least one sensor associated with the non-magnetic tubing section. A magnetic field generating device is positioned within the non-magnetic tubing section and the device is activated to inductively couple the device to the at least one sensor. Data relating to the at least measured parameter is then transmitted through the non-magnetic tubing section to the magnetic field generating device by means of the inductive coupling. The data retrieved from the at least one sensor may then be transmitted to surface using a fluid pressure pulse generating device associated with the magnetic field generating device.

IPC Classes  ?

• G01V 3/00 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation
• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
• E21B 47/14 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
• G01V 11/00 - Prospecting or detecting by methods combining techniques covered by two or more of main groups

Abstract

Downhole Apparatus and Method For Providing Zonal Isolation. There is provided a sandscreen joint (110) capable of providing zonal isolation. The ends of the portion of the (110) are capable of extension on activationof the sandscreen (110), including transition areas (135), which are coated with an elastomer sleeve (134). On activation of the sandscreen (110), the sleeve (134) is pushed out into contact with the bore wall and serves to isolate the zone on one side of the activated sleeve (134) from the zone on the other side of the sleeve (134). Thus, the provision of the sleeve (134) on the activated sandscreen (110) may prevent fluid from flowing axially along the bore between the bore wall and sandscreen. This may serve to protect the weave at the transition area (135), preventing axial flow through the transition areas (135).

IPC Classes  ?

• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

There is provided a tubular (124) having a retracted configuration and an extended configuration. The tubular (124) is initially provided in the retracted configuration and run into the wellbore at least partially lined with filter cake (62). The tubular (124) is extended such that a filter cake-disrupting member (56) mounted on the tubular (124) defines high points for disrupting or disturbing the filter cake (62). The tubular may be a sand screen which is expanded by filling activation chambers with high-pressure fluid.

IPC Classes  ?

• E21B 37/02 - Scrapers specially adapted therefor
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

ABSTRACT A downhole apparatus, a method for providing zonal isolation and a method of producing the downhole apparatus are provided. Further, there is provided a sandscreen or shroud capable of providing zonal isolation. The ends of the portion of the sandscreen are capable of extension on activation of the sandscreen, including transition areas, which are coated with an elastomer sleeve. On activation of the sandscreen, the sleeve is pushed out into contact with the bore wall and serves to isolate the zone on one side of the activated sleeve from the zone on the other side of the sleeve. Thus, the provision of the sleeve on the activated sandscreen may prevent fluid from flowing axially along the bore between the bore wall and sandscreen. This may serve to protect the weave at the transition area, preventing axial flow through the transition areas. Date Recue/Date Received 2020-09-03

IPC Classes  ?

• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

An apparatus for generating a fluid pressure pulse downhole includes an elongate tubular housing defining an internal fluid flow passage. A first device is coupled to the housing for controlling a flow of fluid along a first flow path that communicates with the internal fluid flow passage to generate a first fluid pressure pulse. A second device coupled to the housing for controlling a flow of fluid along a second flow path that communicates with the internal fluid flow passage to generate a second fluid pressure pulse. The first and second devices are releasably mounted in corresponding spaces defined in a wall of the housing, and the first and second devices each house a valve having a valve element and a valve seat. The valve being actuatable to control the flow of fluid along the first and second flow paths, respectively.

IPC Classes  ?

• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid
• E21B 34/06 - Valve arrangements for boreholes or wells in wells
• E21B 47/00 - Survey of boreholes or wells

Abstract

A method is for use with subterranean formations, such as oil and/or gas reservoirs. In some examples (e.g., production examples), the method improves the production from that formation. Some of the examples of the method describe selecting both an exertive force (e.g., a pressure) to apply at a wellbore, but together with a drawdown pressure at the wellbore to modify operations (e.g., improve production) at that subterranean formation. The selection of one or both of the exertive force and drawdown pressure may be based on the downhole environment at that wellbore, which can include the porosity and/or permeability of a near-wellbore formation radially surrounding a wellbore. The exertive force and drawdown pressure may be specifically selected to modify the porosity and/or permeability of the near-wellbore formation.

IPC Classes  ?

• E21B 43/16 - Enhanced recovery methods for obtaining hydrocarbons
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 33/129 - PackersPlugs with mechanical slips for hooking into the casing
• E21B 43/02 - Subsoil filtering
• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 41/00 - Equipment or details not covered by groups
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Abstract

The invention relates to a device for determining the depth and orientation of a feature in a wellbore, and to a corresponding method. It also relates to a downhole apparatus for performing an operation in a well comprising a device for determining the depth and orientation of a feature in a wellbore and a device for performing the operation. In an embodiment, a downhole device (42) for determining the depth and orientation of a feature (24, 26, 28) in a wellbore (12) containing a ferrous tubing (14) is disclosed, the device comprising: at least one magnetic field sensor (44) for monitoring the inherent magnetic field of the ferrous tubing so that the presence of the feature can be detected; and at least one orientation sensor (48) for determining the orientation of the device within the wellbore. An output from the at least one magnetic field sensor is correlated with an output from the at least one orientation sensor so that the orientation of the feature detected by the at least one magnetic field sensor within the wellbore can be determined.

IPC Classes  ?

• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
• E21B 47/026 - Determining slope or direction of penetrated ground layers
• E21B 47/04 - Measuring depth or liquid level
• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling

Abstract

A downhole apparatus including a tubular body, first and second ports in a wall of the body, and a fluid pressure-responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port is open and the second port is closed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port is open and the second port is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port is open and the first port is closed.

IPC Classes  ?

• E21B 43/10 - Setting of casings, screens or liners in wells
• G06F 3/044 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 43/08 - Screens or liners
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
• E21B 23/04 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
• E21B 33/12 - PackersPlugs
• G06F 3/047 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
• H03K 17/96 - Touch switches

Abstract

An example apparatus (12) for generating downhole fluid pressure pulses includes a tubular housing (46) defining an internal fluid flow passage (48) and providing a housing wall (60) having an internal surface (61) and an external surface (63). The apparatus also includes a device (50) for selectively generating a fluid pressure pulse, the device being mounted in an aperture (65) defined in the housing wall and being movable between a retracted position, where the device is seated within the aperture, and a radially extended position, where the device extends at least partially beyond the external surface.

IPC Classes  ?

• E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the like
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

An example apparatus (12) for generating downhole fluid pressure pulses includes a tubular housing (46) defining an internal fluid flow passage (48) and providing a housing wall (60) having an internal surface (61) and an external surface (63). The apparatus also includes a device (50) for selectively generating a fluid pressure pulse, the device being mounted in an aperture (65) defined in the housing wall and being movable between a retracted position, where the device is seated within the aperture, and a radially extended position, where the device extends at least partially beyond the external surface.

IPC Classes  ?

• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid
• E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the like

Abstract

Methods of monitoring a force applied to a component (28) in a wellbore (12) following drilling and during a subsequent operation. Methods comprising: providing a string of tubing (35) including a tubular member (46) having at least one sensor (48) for measuring the strain in the tubing, and a device (50) for transmitting data to surface and which is operatively associated with the sensor. Running the string of tubing into the wellbore; monitoring the strain in the tubing measured by the sensor and compensating for the strain. Performing an operation in the well employing the tubing, involving the application of a force to the component in the wellbore; monitoring the resultant change in strain in the tubing measured by the sensor; and transmitting data relating to the resultant change in strain to surface using the data transmission device, to facilitate determination of the force applied to the component.

IPC Classes  ?

• E21B 47/007 - Measuring stresses in a pipe string or casing
• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

An example method includes introducing a string of tubing into a wellbore (10) to perform a primary operation, the string of tubing including at least one sensor (34) for measuring strain and at least one device (36) operatively associated with the at least one sensor, translating the string of tubing relative to the wellbore, imparting a load on the string of tubing when the tubing becomes stuck in the wellbore at a stuck point (42) and thereby generating strain in the string of tubing above the stuck point, measuring the strain with the at least one sensor, transmitting data indicative of the strain to a surface location with the at least one device, and determining a position of the at least one sensor in the wellbore, as based on the strain, relative to the stuck point.

IPC Classes  ?

• E21B 23/01 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
• E21B 29/00 - Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windowsDeforming of pipes in boreholes or wellsReconditioning of well casings while in the ground
• E21B 31/20 - Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes

IPC Classes  ?

• E21B 29/00 - Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windowsDeforming of pipes in boreholes or wellsReconditioning of well casings while in the ground
• E21B 29/02 - Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windowsDeforming of pipes in boreholes or wellsReconditioning of well casings while in the ground by explosives or by thermal or chemical means
• E21B 31/00 - Fishing for or freeing objects in boreholes or wells
• E21B 47/007 - Measuring stresses in a pipe string or casing
• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes

Abstract

Methods of monitoring a force applied to a component (28) in a wellbore (12) following drilling and during a subsequent operation. Methods comprising: providing a string of tubing (35) including a tubular member (46) having at least one sensor (48) for measuring the strain in the tubing, and a device (50) for transmitting data to surface and which is operatively associated with the sensor. Running the string of tubing into the wellbore; monitoring the strain in the tubing measured by the sensor and compensating for the strain. Performing an operation in the well employing the tubing, involving the application of a force to the component in the wellbore; monitoring the resultant change in strain in the tubing measured by the sensor; and transmitting data relating to the resultant change in strain to surface using the data transmission device, to facilitate determination of the force applied to the component.

IPC Classes  ?

• E21B 47/00 - Survey of boreholes or wells
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

The invention relates to a method for obtaining real-time data relating to a well construction activity, and to a corresponding downhole assembly. The invention also relates to a downhole tool assembly for such a use. In one embodiment, a method of obtaining real-time data relating to a well construction activity is disclosed, the method comprising the steps of: locating wellbore-lining tubing (18) comprising at least one non-magnetic tubing section (38) in a wellbore (12) of a well; measuring at least one downhole parameter at a location (43) external of the wellbore-lining tubing using at least one sensor (40, 42) associated with the non-magnetic tubing section; positioning a magnetic field generating device (44) within the non-magnetic tubing section and activating the device to inductively couple the device to the at least one sensor; transmitting data relating to the at least measured parameter through the non-magnetic tubing section to the magnetic field generating device by means of the inductive coupling; and transmitting the data retrieved from the at least one sensor to surface using a fluid pressure pulse generating device (46) associated with the magnetic field generating device.

IPC Classes  ?

• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

The invention relates to a method for obtaining real-time data relating to a well construction activity, and to a corresponding downhole assembly. The invention also relates to a downhole tool assembly for such a use. In one embodiment, a method of obtaining real-time data relating to a well construction activity is disclosed, the method comprising the steps of: locating wellbore-lining tubing (18) comprising at least one non-magnetic tubing section (38) in a wellbore (12) of a well; measuring at least one downhole parameter at a location (43) external of the wellbore-lining tubing using at least one sensor (40, 42) associated with the non-magnetic tubing section; positioning a magnetic field generating device (44) within the non-magnetic tubing section and activating the device to inductively couple the device to the at least one sensor; transmitting data relating to the at least measured parameter through the non-magnetic tubing section to the magnetic field generating device by means of the inductive coupling; and transmitting the data retrieved from the at least one sensor to surface using a fluid pressure pulse generating device (46) associated with the magnetic field generating device.

IPC Classes  ?

• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 47/06 - Measuring temperature or pressure
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

This invention relates to apparatus for generating a fluid pressure pulse downhole. One such apparatus (12) is disclosed which comprises an elongate, generally tubular housing (46) defining an internal fluid flow passage (48); a first device (50) for controlling the flow of fluid along a first flow path (52) which communicates with the internal fluid flow passage, to generate a first fluid pressure pulse; and a second device (54) for controlling the flow of fluid along a second flow path (56) which communicates with the internal fluid flow passage, to generate a second fluid pressure pulse. The first and second devices are both provided in the housing, take the form of a cartridge which can be releasably mounted in a space (80, 82) provided in a wall (60) of the housing, and house a valve (74) having a valve element (76) and a valve seat (78), the valve being actuable to control the flow of fluid along the respective flow path.

IPC Classes  ?

• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

This invention relates to apparatus for generating a fluid pressure pulse downhole. One such apparatus (12) is disclosed which comprises an elongate, generally tubular housing (46) defining an internal fluid flow passage (48); a first device (50) for controlling the flow of fluid along a first flow path (52) which communicates with the internal fluid flow passage, to generate a first fluid pressure pulse; and a second device (54) for controlling the flow of fluid along a second flow path (56) which communicates with the internal fluid flow passage, to generate a second fluid pressure pulse. The first and second devices are both provided in the housing, take the form of a cartridge which can be releasably mounted in a space (80, 82) provided in a wall (60) of the housing, and house a valve (74) having a valve element (76) and a valve seat (78), the valve being actuable to control the flow of fluid along the respective flow path.

IPC Classes  ?

• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

A method of injecting fluid into a formation, comprises exerting a mechanical force on a wall of a bore extending through a formation to modify the permeability of the formation; and injecting fluid into the modified formation. The mechanical force may be exerted through inflation of at least one pressure deformable member mounted on a base member. The base member may be a base pipe. The pressure deformable member may be a hollow or tubular member mounted externally of the base pipe. A plurality of pressure deformable members are provided.

IPC Classes  ?

• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 43/02 - Subsoil filtering
• E21B 43/04 - Gravelling of wells
• E21B 43/08 - Screens or liners
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures

Abstract

The invention relates to a wellbore-lining tubing comprising at least one window pre-formed in the wall of the tubing and a device for selectively generating a fluid pressure pulse, and to a method of forming a lateral wellbore employing such a tubing. m) provided in the wall of the tubing; and a coupling (190) for receiving a deflection tool (192) so that the deflection tool can be secured to the tubing and employed to divert a downhole component (202) through the window in the tubing wall.

IPC Classes  ?

• E21B 7/06 - Deflecting the direction of boreholes
• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid
• E21B 41/00 - Equipment or details not covered by groups
• E21B 43/10 - Setting of casings, screens or liners in wells

Abstract

The invention relates to a device for determining the depth and orientation of a feature in a wellbore, and to a corresponding method. It also relates to a downhole apparatus for performing an operation in a well comprising a device for determining the depth and orientation of a feature in a wellbore and a device for performing the operation. In an embodiment, a downhole device (42) for determining the depth and orientation of a feature (24, 26, 28) in a wellbore (12) containing a ferrous tubing (14) is disclosed, the device comprising: at least one magnetic field sensor (44) for monitoring the inherent magnetic field of the ferrous tubing so that the presence of the feature can be detected; and at least one orientation sensor (48) for determining the orientation of the device within the wellbore. An output from the at least one magnetic field sensor is correlated with an output from the at least one orientation sensor so that the orientation of the feature detected by the at least one magnetic field sensor within the wellbore can be determined.

IPC Classes  ?

• E21B 47/02 - Determining slope or direction

Abstract

A downhole apparatus comprising a tubular body (34a, b); first and second ports (36, 38) in a wall of the body (34a), and a fluid pressure- responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port (36) is open and the second port (38) is dosed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port (36) is open and the second port (38) is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port (38) is open and the first port (36) is closed.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 43/08 - Screens or liners
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells

Abstract

A downhole apparatus comprising a tubular body (34a, b); first and second ports (36, 38) in a wall of the body (34a), and a fluid pressure- responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port (36) is open and the second port (38) is dosed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port (36) is open and the second port (38) is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port (38) is open and the first port (36) is closed.

IPC Classes  ?

• E21B 34/10 - Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
• E21B 43/08 - Screens or liners
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells

Abstract

A method of communication comprising: providing a string of a plurality of connected components (2,3,5,6,7), one or more vessels running along the string to form a continuous fluid path (13); incorporating a device (3) into the string so that the device is in communication with the fluid path; inserting the string into a borehole (18) so that the device is located below a surface into which the borehole is formed and the fluid path extends from the surface to the device; providing a pressure sensor at the surface, adapted to sense the pressure of the fluid in the fluid path; filling it with a pressurized fluid; over a communication period, venting fluid, under the control of the device, from the fluid path (13) to an exterior of the string (17) at the device on occasions, so that the resulting decrease in pressure in the fluid in the fluid path can be detected by the pressure sensor; and during the communication period introducing fluid into the fluid path at a rate below 30 gallons/minute [0.113 m3/minute].

IPC Classes  ?

• E21B 47/22 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid by negative mud pulses using a pressure relief valve between drill pipe and annulus
• E21B 7/06 - Deflecting the direction of boreholes
• E21B 29/06 - Cutting windows, e.g. directional window cutters for whipstock operations
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

A method of injecting fluid into a formation, comprises exerting a mechanical force on a wall of a bore extending through a formation to modify the permeability of the formation; and injecting fluid into the modified formation. The mechanical force may be exerted through inflation of at least one pressure deformable member mounted on a base member. The base member may be a base pipe. The pressure deformable member may be a hollow or tubular member mounted externally of the base pipe. A plurality of pressure deformable members may be provided.

IPC Classes  ?

• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 43/02 - Subsoil filtering
• E21B 43/04 - Gravelling of wells
• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures

Abstract

A gravel packing method includes locating gravel in an annulus between a bore wall and an apparatus comprising at least one pressure deformable member and inflating the at least one pressure deformable member to stress the gravel. The method may also include: providing an apparatus comprising a plurality of pressure deformable members mounted around a base pipe, and a sand control element supported by the pressure deformable members; running the apparatus into a bore in an initial smaller diameter configuration; locating gravel between the sand control element and a wall of the bore; and deforming the pressure deformable members to expand the apparatus to a larger diameter configuration. The gravel may be so located between the sand control element and the wall of the bore to complete a gravel pack operation, while the pressure deformable members may be deformed to expand the apparatus so as to stress the gravel.

IPC Classes  ?

• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 43/02 - Subsoil filtering
• E21B 43/04 - Gravelling of wells
• E21B 43/08 - Screens or liners
• E21B 43/10 - Setting of casings, screens or liners in wells
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures

Abstract

A downhole apparatus is provided which includes a base pipe, a plurality of axially extending pressure deformable members mounted around the base pipe and at least one circumferential retaining ring located externally of the members. Further, a downhole method includes locating a plurality deformable members on a base pipe in a deflated configuration, locating at least one retaining ring over the deflated deformable members to thereby retain the deformable members radially, and inflating the deformable members to extend radially beyond the at least one retaining ring to thereby retain the at least one ring axially along the deformable members.

IPC Classes  ?

• E21B 17/18 - Pipes provided with plural fluid passages
• E21B 33/127 - PackersPlugs with inflatable sleeve
• E21B 33/129 - PackersPlugs with mechanical slips for hooking into the casing

Abstract

A downhole assembly includes an apparatus for generating a fluid pressure pulse downhole. A disclosed apparatus for generating a fluid pressure pulse downhole includes an elongate, generally tubular housing defining an internal fluid flow passage and having a housing wall. The apparatus also includes a device for selectively generating a fluid pressure pulse, the device having a cartridge which can be releasably mounted entirely within a space provided in the wall of the tubular housing. The internal fluid flow passage defined by the tubular housing is a primary fluid flow passage. A secondary fluid flow passage has an inlet which communicates with the primary fluid flow passage. The cartridge houses a valve actuable to control fluid flow through the secondary fluid flow passage to selectively generate a fluid pressure pulse. Data relating to a measured downhole parameter or parameters can be transmitted to surface via the pressure pulses.

IPC Classes  ?

• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid
• E21B 41/00 - Equipment or details not covered by groups

Abstract

A method of communication comprising: providing a string of a plurality of connected components (2,3,5,6,7), one or more vessels running along the string to form a continuous fluid path (13); incorporating a device (3) into the string so that the device is in communication with the fluid path; inserting the string into a borehole (18) so that the device is located below a surface into which the borehole is formed and the fluid path extends from the surface to the device; providing a pressure sensor at the surface, adapted to sense the pressure of the fluid in the fluid path; filling it with a pressurised fluid; over a communication period, venting fluid, under the control of the device, from the fluid path (13) to an exterior of the string (17) at the device on occasions, so that the resulting decrease in pressure in the fluid in the fluid path can be detected by the pressure sensor; and during the communication period introducing fluid into the fluid path at a rate below 30 gallons/minute [0.113 m3 /minute].

IPC Classes  ?

• E21B 7/06 - Deflecting the direction of boreholes
• E21B 29/06 - Cutting windows, e.g. directional window cutters for whipstock operations
• E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid

Abstract

The invention relates to apparatus for generating a fluid pressure pulse downhole. The invention also relates to a downhole assembly comprising a first apparatus for generating a fluid pressure pulse downhole and at least one further such apparatus, to a device for selectively generating a fluid pressure pulse downhole, and to a method of generating a fluid pressure pulse downhole. In one embodiment, an apparatus (12) for generating a fluid pressure pulse downhole is disclosed which comprises an elongate, generally tubular housing (28) defining an internal fluid flow passage (30) and having a housing wall (32). The apparatus also comprises a device (34) for selectively generating a fluid pressure pulse, the device comprising a cartridge which can be releasably mounted entirely within a space (36) provided in the wall of the tubular housing. The internal fluid flow passage defined by the tubular housing is a primary fluid flow passage, and the apparatus comprises a secondary fluid flow passage (72) having an inlet (74) which communicates with the primary fluid flow passage. The cartridge houses a valve comprising a valve element (46) and a valve seat (48), the valve being actuable to control fluid flow through the secondary fluid flow passage to selectively generate a fluid pressure pulse. Data relating to a measured downhole parameter or parameters can be transmitted to surface via the pressure pulses.

IPC Classes  ?

• E21B 21/08 - Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
• E21B 21/10 - Valves arrangements in drilling-fluid circulation systems

Abstract

An apparatus for generating a fluid pressure pulse downhole is disclosed which comprises an elongate, generally tubular housing defining an internal fluid passage and having a housing wall. The apparatus also comprises a device for selectively generating a fluid pressure pulse, the device comprising a cartridge which can be releasably mounted entirely within a space provided in the wall of the tubular housing. The internal fluid flow passage defined by the tubular housing is a primary fluid flow passage, and the apparatus comprises a secondary fluid flow passage having an inlet which communicates with the primary fluid flow passage. The cartridge houses a valve comprising a valve element and a valve seat, the valve being actuable to control fluid flow through the secondary fluid flow passage to selectively generate a fluid pressure pulse. Data relating to a measured downhole parameter or parameters can be transmitted to surface via the pressure pulses.

IPC Classes  ?

• E21B 21/08 - Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
• E21B 21/10 - Valves arrangements in drilling-fluid circulation systems

Abstract

Downhole apparatus comprises a base pipe and a plurality of non-concentric pressure deformable chambers mounted externally on the pipe. The chambers may be inflated to increase the diameter of the apparatus and engage and support a surrounding bore wall.

IPC Classes  ?

• E21B 43/08 - Screens or liners
• E21B 33/127 - PackersPlugs with inflatable sleeve

Abstract

Downhole apparatus for location in a bore which intersects a fluid-producing formation comprises a bore wall-supporting member configurable to provide and maintain a bore wall supporting force for a fluid-producing formation of at least 2 MPa, whereby fluid may flow from the formation into the bore. The bore wall supporting force may be utilized to modify or maintain the permeability of the rock adjacent the bore wall.

IPC Classes  ?

• E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells