Abstract: A seal assembly for a bypass valve in a well packer has a tubular seal carrier with a pair of annular seal elements mounted in a longitudinally spaced relation about the inner periphery thereof. The annular seal elements are anchored in separate inwardly flared grooves around the interior of the seal carrier in such that they are prevented from being dislodged by fluid pressure. An outer seal element is mounted around the outer periphery of the seal carrier to seal between the seal carrier and a bypass valve housing of the well packer.

Abstract: A poppet valve guide mechanism for use in pumps such as large piston-type pumps uses a valve guide sleeve secured to an outwardly extending base plate which has a plurality of support legs attached thereto. The guide and support assembly are retained in place by a partially tapered locking bar transversely engaged on said assembly, and arranged to seat the support legs tightly on an annular ledge formed in the pump's fluid-end chamber.

Abstract: A poppet valve guide mechanism for use in pumps such as piston type pumps, utilizes a valve guide collar secured to a crossbar support and retained by a locking bar transverse thereto.

Abstract: A seal assembly for a downhole hydraulically operated oil well pump has a dovetail shaped groove around the exterior of the pump body and a seal element mounted therein. The seal element has an inner side resting against the groove bottom, one end of a full thickness filling that end of the groove and extending therefrom toward the opposite end having a recess portion around the outer perimeter thereof forming a lip about a mid-portion of the seal element which is deformed by fluid pressure acting toward that end of the seal to urge the lip outward into sealing contact with a pump housing which encloses the pump body.

Abstract: A single string well packer having a pair of unitary tubular gripping members is disclosed which can be set by wireline, hydraulic pressure, or mechanically or tubing string.

Abstract: A seal assembly for a valve in a mechanical setting retrievable and pressure balanced packer has a valve seal mounted on a bushing mounted around a mandrel joined to an anchor and enclosed within a balance chamber housing. The valve seal is retained between the bushing and an overlapping coaxial face seal retainer such that only a relatively small portion of the face seal ring will contact the seal surface of a valve seat on the packer.

Abstract: An oilwell tubing tester for the in-place pressure-testing of oilwell tubing strings for leaks, utilizes a flapper valve, a valve seat, a three-piece sealing mechanism, and a sliding J-mandrel located inside the tester housing in abutting relationship with the flapper valve.

Abstract: A valve actuator is disclosed having a motor operating mode and a manual operating mode, with the shifting from motor to manual operation accomplished by sliding the manual operator axially inward toward the actuator mechanism. The invention features a sliding rod mechanism abutting and coaxially aligned with the motor and manual operator, which shifts engagement from motor to manual upon movement inward of the manual operator. The rod mechanism is sized to prevent simultaneous engagement of the motor and the manual operator with the actuator gearing, and resilient biasing means may be provided to continuously bias the actuator toward motorized operation and disengagement of the manual operator.

Abstract: A mechanical disconnect assembly is disclosed for rapid disengagement of an electric motor from a gear or shaft system on loss of power to the motor, and for rapid reengagement of the motor upon restoration of electric power thereto. The assembly utilizes a sliding slave member made of a magnetic material and arranged to be drawn into the magnetic field of the electric motor when under power. The slave member is operably connected to a sliding engagement member on the motor output shaft and is resiliently biased out of said magnetic field by spring means and out of engagement with the gear assembly.

Abstract: A gear shaft assembly is disclosed which utilizes a hollow splined shaft having a sliding worm gear sleeve splined thereon engaged with a driven gear. The splined shaft has clutch members at each end, engageable at one end with a motor shaft and at the other end with a manual operator shaft. A sliding rod assembly in the hollow shaft prevents simultaneous engagement of the splined shaft with the motor shaft and the manual operator shaft.

Abstract: An automatic motorized valve actuator is disclosed which features a worm gear drive assembly for receiving high rotational motion of a drive motor and reducing it to the low speed linear or rotational motion of a valve stem. A coaxial alignment of the motor shaft, the worm gear shaft and a manual operator shaft eliminates the need for a separate shifting assembly for shifting from motorized to manual operating mode. The invention further discloses clutches for operationally connecting the various shafts, a sliding lockout rod assembly for preventing simultaneous engagement of manual and motor operating modes, magnetic motor engagement and disconnect means, and resilient torque sensing means for shutting off power to the motor.

Abstract: A spring resistance cartridge assembly for a valve actuator is disclosed which offers resistance to movement in either direction of an axial member extending therein. The cartridge assembly has a base plate securable to an axial member and an opposing fixed plate which is secured in a non-movable position. Between the base plate and the fixed plate are two compression plates having spring members trapped therebetween. Bolts and studs attach the compression plates one to each, the base plate and the fixed plate.

Abstract: A normally open shutdown system for a high pressure gas well is disclosed which comprises a pressure-operated motor valve, a pressure sensor, and a pressure regulator, all on a conduit installed in the high pressure line leading from the gas well.

Abstract: An oilwell swab cup is formed by clamping a plurality of vertical wire members in a circular U-shaped cup and molding an elastomeric material around the wires and cup.

Abstract: An oilwell swab cup is formed by clamping a plurality of vertical wire members in a circular U-shaped cup and molding an elastomeric material around the wires and cup.

Abstract: A gate valve seat ring retainer particularly for a non-ported gate valve comprising an annular seat ring mountable in a seat pocket around the flow passageway in a gate valve body. A recess in the valve body opens into the flow passageway in a spaced relation to the seat pocket. An elongated retainer extending in the flow passageway has one end portion secured to the seat ring and the opposite end portion engaged in the recess to hold and retain the seat ring in place in the gate valve body.