Abrégé

The present invention relates to acirculation subassembly (circsub) for incorporation in a drill pipe. The circsub has a flow through condition in which the circsub allows fluid to flow through a bore of the circsub and does not allow fluid communication between the bore of the circsub and an annulus located outside the drill pipe, a partial bypass condition in which the circsub allows fluid to flow through the bore of the circsub and allows fluid communication between the bore of the circsub and the annulus, and a full bypass condition in which the circsub does not allow fluid to flow through the bore of the circsub and allows fluid communication between the bore of the circsub and the annulus. An actuator is provided to change the circsub between conditions under the control of a controller.

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage
• E21B 34/14 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par le mouvement des outils, p. ex. obturateurs à manchons actionnés par des pistons ou par des outils à câble
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

Circulation Subassembly The present invention relates to acirculation subassembly (circsub) for incorporation in a drill pipe. The circsub has a flow through condition in which the circsub allows fluid to flow through a bore of the circsub and does not allow fluid communication between the bore of the circsub and an annulus located outside the drill pipe, a partial bypass condition in which the circsub allows fluid to flow through the bore of the circsub and allows fluid communication between the bore of the circsub and the annulus, and a full bypass condition in which the circsub does not allow fluid to flow through the bore of the circsub and allows fluid communication between the bore of the circsub and the annulus. An actuator is provided to change the circsub between conditions under the control of a controller.

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage
• E21B 34/14 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par le mouvement des outils, p. ex. obturateurs à manchons actionnés par des pistons ou par des outils à câble
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

A downhole tool for incorporation in a drill pipe for selective operation of the tool from surface level when the tool is in a wellbore. The tool comprises a controller electrically powered by a power source separate from surface level, a first sensor of the controller to detect a dynamic variable of the tool in the wellbore and produce an output signal dependent thereon; a second sensor of the controller to detect a mechanical signal transmitted from an operator at surface level; a motor driven by the power source under the control of the controller when said mechanical signal is received; and an actuator driven by the motor to actuate the tool; wherein the controller switches between at least two states in response to changes in said dynamic variable, only in said second state the controller being receptive to said mechanical signal from the operator to drive the motor. The tool may be a disconnect device and/or a circ sub. A disconnect device has axially displaceable die retention sleeve preventing radial movement of dies that lock between the dies and a mandrel. When the retention sleeve is moved so that the dies can move, the disconnect is actuated. A circsub has a body having a throughbore receiving a piston movable between open and closed positions to control ports in the body selectively connecting the throughbore with the wellbore, said motor driving said actuator to enable or disable movement of the piston to said open position.

Classes IPC  ?

• E21B 17/06 - Joints libérables, p. ex. joints de sécurité
• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 47/00 - Relevés dans les trous de forage ou dans les puits
• G01P 15/00 - Mesure de l'accélérationMesure de la décélérationMesure des chocs, c.-à-d. d'une variation brusque de l'accélération
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

A downhole tool for incorporation in a drill pipe for selective operation of the tool from surface level when the tool is in a wellbore. The tool comprises a controller electrically powered by a power source separate from surface level, a first sensor of the controller to detect a dynamic variable of the tool in the wellbore and produce an output signal dependent thereon; a second sensor of the controller to detect a mechanical signal transmitted from an operator at surface level; a motor driven by the power source under the control of the controller when said mechanical signal is received; and an actuator driven by the motor to actuate the tool; wherein the controller switches between at least two states in response to changes in said dynamic variable, only in said second state the controller being receptive to said mechanical signal from the operator to drive the motor. The tool may be a disconnect device and/or a circ sub. A disconnect device has axially displaceable die retention sleeve preventing radial movement of dies that lock between the dies and a mandrel. When the retention sleeve is moved so that the dies can move, the disconnect is actuated. A circsub has a body having a throughbore receiving a piston movable between open and closed positions to control ports in the body selectively connecting the throughbore with the wellbore, said motor driving said actuator to enable or disable movement of the piston to said open position.

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 17/06 - Joints libérables, p. ex. joints de sécurité
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

A downhole tool for incorporation in a drill pipe for selective operation of the tool from surface level when the tool is in a wellbore. The tool comprises a controller electrically powered by a power source separate from surface level, a first sensor of the controller to detect a dynamic variable of the tool in the wellbore and produce an output signal dependent thereon; a second sensor of the controller to detect a mechanical signal transmitted from an operator at surface level; a motor driven by the power source under the control of the controller when said mechanical signal is received; and an actuator driven by the motor to actuate the tool; wherein the controller switches between at least two states in response to changes in said dynamic variable, only in said second state the controller being receptive to said mechanical signal from the operator to drive the motor.

Classes IPC  ?

• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage

Abrégé

A downhole tool for incorporation in a drill pipe for selective operation of the tool from surface level when the tool is in a wellbore. The tool comprises a controller electrically powered by a power source separate from surface level, a first sensor of the controller to detect a dynamic variable of the tool in the wellbore and produce an output signal dependent thereon; a second sensor of the controller to detect a mechanical signal transmitted from an operator at surface level; a motor driven by the power source under the control of the controller when said mechanical signal is received; and an actuator driven by the motor to actuate the tool; wherein the controller switches between at least two states in response to changes in said dynamic variable, only in said second state the controller being receptive to said mechanical signal from the operator to drive the motor.

Classes IPC  ?

• E21B 17/06 - Joints libérables, p. ex. joints de sécurité

Abrégé

A downhole tool for incorporation in a drill pipe for selective operation of the tool from surface level when the tool is in a wellbore. The tool comprises a controller electrically powered by a power source separate from surface level, a first sensor of the controller to detect a dynamic variable of the tool in the wellbore and produce an output signal dependent thereon; a second sensor of the controller to detect a mechanical signal transmitted from an operator at surface level; a motor driven by the power source under the control of the controller when said mechanical signal is received; and an actuator driven by the motor to actuate the tool; wherein the controller switches between at least two states in response to changes in said dynamic variable, only in said second state the controller being receptive to said mechanical signal from the operator to drive the motor. The tool may be a disconnect device and/or a circ sub. A disconnect device has axially displaceable die retention sleeve preventing radial movement of dies that lock between the dies and a mandrel. When the retention sleeve is moved so that the dies can move, the disconnect is actuated. A circsub has a body having a throughbore receiving a piston movable between open and closed positions to control ports in the body selectively connecting the throughbore with the wellbore, said motor driving said actuator to enable or disable movement of the piston to said open position.

Classes IPC  ?

• E21B 17/06 - Joints libérables, p. ex. joints de sécurité
• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

Circulation Subassembly The present invention relates to acirculation subassembly (circsub) for incorporation in a drill pipe. The circsub has a flow through condition in which the circsub allows fluid to flow through a bore of the circsub and does not allow fluid communication between the bore of the circsub and an annulus located outside the drill pipe, a partial bypass condition in which the circsub allows fluid to flow through the bore of the circsub and allows fluid communication between the bore of the circsub and the annulus, and a full bypass condition in which the circsub does not allow fluid to flow through the bore of the circsub and allows fluid communication between the bore of the circsub and the annulus. An actuator is provided to change the circsub between conditions under the control of a controller.

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits
• E21B 34/14 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par le mouvement des outils, p. ex. obturateurs à manchons actionnés par des pistons ou par des outils à câble

Abrégé

A downhole tool for incorporation in a drill pipe for selective operation of
the tool from
surface level when the tool is in a wellbore. The tool comprises a controller
electrically
powered by a power source separate from surface level, a first sensor of the
controller to
detect a dynamic variable of the tool in the wellbore and produce an output
signal dependent
thereon; a second sensor of the controller to detect a mechanical signal
transmitted from an
operator at surface level; a motor driven by the power source under the
control of the
controller when said mechanical signal is received; and an actuator driven by
the motor to
actuate the tool; wherein the controller switches between at least two states
in response to
changes in said dynamic variable, only in said second state the controller
being receptive to
said mechanical signal from the operator to drive the motor.

Classes IPC  ?

• E21B 17/06 - Joints libérables, p. ex. joints de sécurité