A stuffing box for sealing the end of a rotatable rod is disclosed. The stuffing box includes a sleeve adapted to concentrically receive a portion of the rod therethrough and a tubular pipe concentrically arranged within the sleeve, the rod passing generally concentrically through the pipe, the pipe being in annular spaced relation to the sleeve and the rod. One or more ring seals are arranged between the pipe and the sleeve to prevent the flow of well fluids into the annulus between the sleeve and the pipe. An annular fluid chamber is defined between the sleeve and the pipe below the ring seals. During normal operation, the fluid chamber is pressurized to apply a pressure to the one or more ring seals. One or more uni-directional seals are arranged below the fluid chamber and configured to permit fluid flow into the fluid chamber.
A rod lock out clamp includes a housing having a central bore for receiving a rod in spaced relation therethrough and clamp members in the housing for grippingly and frictionally engaging the rod in the bore. At least one of the clamp members has an inner end and a recess in the inner end, the recess having a profile with an arcuate portion having a radius of curvature that reduces from a maximum radius to a minimum radius. Manipulating means are coupled to the housing and the clamp members for moving the clamp members between a rod gripping position and a retracted position.
A stuffing box and seal cartridge for sealing the end of a rotatable rod is disclosed. The stuffing box includes a sleeve adapted to concentrically receive a portion of the rod therethrough and a tubular pipe concentrically arranged within the sleeve, the rod passing generally concentrically through the pipe, the pipe being in annular spaced relation to the sleeve and the rod. One or more ring seals are arranged between the pipe and the sleeve to prevent the flow of well fluids into the annulus between the sleeve and the pipe. An annular fluid chamber is defined between the sleeve and the pipe below the ring seals. One or more uni-directional seals are arranged below the fluid chamber and configured to permit fluid flow into the fluid chamber. During normal operation, the fluid chamber is pressurized to apply a pressure to the one or more ring seals, and the fluid chamber pressure is varied in response to well fluid pressure.
Embodiments of a wellhead assembly have a tubular body with a removable bottom cap to house a tubing rotator comprising a multi-enveloping worm gear assembly which provides sufficient torque to rotate tubing strings in deep and/or deviated wellbores. The bottom cap is supported on a wellhead having a dognut for supporting a production string therefrom in a wellbore. The bottom cap rotatably supports a mandrel and multi-enveloping worm wheel thereon, the mandrel being connected to the dognut and tubing string for co-rotation therewith. The tubular body supports a multi-enveloping worm for engagement with the worm wheel when the tubular body is lowered axially onto the bottom cap. When the tubular body and worm are lifted axially from the bottom cap, the worm wheel and mandrel are exposed for repair or replacement without need to pull the production string from the wellbore. The tubular housing can further house a flow tee and opposing blowout preventer ports and rams therein, forming an integrated wellhead assembly.
E21B 33/04 - Casing headsSuspending casings or tubings in well heads
F16H 1/16 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
37 - Construction and mining; installation and repair services
Goods & Services
Wellhead drives, namely, gear drives, belt drives and hydraulic drives; progressive cavity pumps; Remote power units for use in the oil and gas industry, in the nature of dynamos; Powered oil well blow out preventers having a sealing and clamp mechanism for use in the oil and gas industry; stuffing boxes being part of machines that eliminate oil spills to protect the environment in the oil and gas industry Maintenance and servicing of artificial lift systems and components, namely, wellhead drives, power units, and hydraulic and electric systems for use in the oil and gas industry
Embodiments of a safety guard, fit concentrically over a rotating member, such as a rod assembly, which extends outwardly from apparatus, such as a drive head. The guard may be restrained during normal operation for preventing entanglement of personnel or other apparatus with the rod assembly which continues to rotate within the tubular guard, or may be unrestrained during normal operation. When unrestrained, the guard is free to co-rotate with the rod assembly, but has a low moment of inertia such that the guard decelerates rapidly when restrained so as to prevent entanglement. An anti-friction interface between the guard and the rod assembly is formed by the material of manufacture of the guard itself or by bearings or bushings supported in an annulus between the guard and the rod assembly.
A pulling clamp is provided for releaseable connection to a blunt, uphole string end of a continuous string. A main clamp body has clamp bore therethrough and having a string-receiving opening at the pulling end for receiving the string end, an actuating bore at the pulled end and a tapered bore therebetween. A taper insert having a radially compressible gripping bore is beatable in the tapered bore and axially actuable between a passive first receiving position, for receiving the string end, and the active second gripping position for radially compressing the taper insert about the string end for actively gripping the string end therein. The taper insert can be axially actuated using a threaded main body and threaded top cap for sandwiching the taper insert therebetween, the top cap being threaded axially into and out of the pulled end of the main body between the passive and active positions.
09 - Scientific and electric apparatus and instruments
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
(1) Wellhead drives namely gear drives, belt drives and hydraulic drives; progressive cavity pumps; stuffing boxes all for use in the oil and gas industry
(2) Remote power units for use in the oil and gas industry
(3) Blow out preventers having a sealing and clamp mechanism for use in the oil and gas industry (1) Manufacture of artificial lift systems and components for the oil and gas industry
(2) Maintenance and servicing of artificial lift systems and components namely, wellhead drives, power units, and hydraulic and electric systems for use in the oil and gas industry
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
20 - Furniture and decorative products
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
(1) A releaseable clamp that supports and holds a rod string in wellhead equipment for use in the oil and gas industry (1) Manufacture, maintenance and servicing of a releaseable clamp that supports and holds a rod string in well head equipment for use in the oil and gas industry
In a downhole rod-driven pump, continuous rod is used to drive the pump. The continuous rod is connected directly to the drive eliminating the need for a polish rod and an uphole coupling. A coupling is used to connect the continuous rod to the pump reducing restrictions in the production annulus and wear on the production tubing. Further, clean out tubing can be inserted into the production tubing beside the continuous rod and can extend therein to the pump without restriction. When the coupling is a threaded coupling, the continuous rod can be rotated in an appropriate direction to release the continuous rod from the pump when the pump is stuck. When the coupling is a shear coupling, the shear coupling can be sheared for releasing the pump from the continuous rod. When the pump is a progressing cavity pump and the coupling is a shear coupling, the continuous rod can be reverse rotated for changing the direction of pumping and if the rotor thereafter remains stuck, the shear coupling can be sheared.
F04B 47/02 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
E21B 17/03 - CouplingsJoints between drilling rod or pipe and drill motor, e.g. between drilling rod and hammer
E21B 17/042 - CouplingsJoints between rod and bit, or between rod and rod threaded
E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
F04B 47/12 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having free plunger lifting the fluid to the surface
13.
Cam-actuated centrifugal brake for preventing backspin
A cam assisted centrifugal brake or clutch system provides increased mechanical advantage to improve the output torque relative to prior art devices such as leading brake shoes. The brake or clutch engagement is cammed radially outwardly to engage a brake housing in one direction and guided to a disengaged position in the other direction. Centrifugal forces retain the brake in the disengaged position. Embodiments of the present invention are applied as a backspin braking system that is incorporated into a drive head for a progressing cavity pump drive system.
F16D 59/00 - Self-acting brakes, e.g. coming into operation at a predetermined speed
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
F16D 51/48 - Self-tightening brakes with pivoted brake-shoes with two linked or directly-interacting brake-shoes
F16D 65/22 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart
F04C 2/107 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
F16D 121/16 - Mechanical for releasing a normally applied brake
14.
CAM-ACTUATED CENTRIFUGAL BRAKE FOR PREVENTING BACKSPIN
A cam assisted centrifugal brake or clutch system provides increased mechanical advantage to improve the output torque relative to prior art devices such as leading brake shoes. The brake or clutch engagement is cammed radially outwardly to engage a brake housing in one direction and guided to a disengaged position in the other direction. Centrifugal forces retain the brake in the disengaged position. Embodiments of the present invention are applied as a backspin braking system that is incorporated into a drive head for a progressing cavity pump drive system.
F16D 51/12 - Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes mechanically actuated
F04C 14/06 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
F16D 59/00 - Self-acting brakes, e.g. coming into operation at a predetermined speed
F16D 65/22 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart
