Abstract: A hydraulic well pump for operating a pump sucker rod string including a hydraulic cylinder assembly for raising and lowering the sucker rod string and a fluid counterbalancing system for offsetting the combined weight of the reciprocating service equipment, the fluid column above the pump plunger, and the sucker rod string. One counterbalancing embodiment includes an air supported piston on the movable cylinder exposed to an air chamber below the air piston functioning independently of the hydraulic and power and logic system of the pump. Another counterbalancing system embodiment uses a hydraulic fluid accumulator connected into the system fluid power and logic for supercharging the hydraulic power pumps during the lift stroke and providing opposing force during the downstroke.

Abstract: A restraining ring and gland for a mechanical joint with a plain plastic pipe end including two semi-circular members securable together by lateral end flanges and having a cylindrical tapered bore having a roughened surface and provided with longitudinally spaced internal annular blunt edged ribs for gripping the plastic pipe without cutting the pipe surface. When the PVC pipe is coupled to iron pipe, one gland is used. When the PVC pipe is connected to a PVC bell or fitting, two glands are used secured together by longitudinal bolts.

Abstract: A stationary beer container having upper and lower end connections coupled with a flow line coupling and valve assembly adapted to cooperate with a standard beer tap head used with barrels or kegs. The flow line coupling and housing assembly of the invention is connected with a line to the lower end of the beer container and a vertical line to the upper end of the container including a transparent section for determining the beer level in the container. The same type of tap head is used for tapping beer from the container, filing the container, and cleaning the container.

Abstract: Well tools for running and setting a well safety valve including a lock mandrel for releasably locking the valve at a no-go landing nipple in a well bore and a running tool for running and setting the lock mandrel. The lock mandrel includes a body provided with a no-go ring, locking dogs on the body, and an expander sleeve movable upwardly in the body for expanding and locking the dogs. The running tool includes a tubular core having an end engageable with an operating tube of the safety valve, an upper latch assembly for engaging the lock mandrel housing to couple the running tool with the lock mandrel, a lower latch assembly for operating the expander sleeve of the lock mandrel to expand the mandrel locking dogs, and a head for connecting the running tool in a wireline tool string. The running tool has locking features which apply a force from a spring of the safety valve to the upper latch assembly to lock the running tool with the lock mandrel.

Abstract: A set screw pocket drilling device for drilling blind holes in a pipe surface at a pipe joint for set screws holding the joint together including an externally threaded sleeve sized to fit the set screw hole and engage the surface of a pipe within a retainer in which the set screw hole is drilled, a drill fitting through and rotatable relative to the sleeve, and apparatus for rotating the drill relative to the sleeve. One embodiment of the device includes only a sleeve and a drill fitting through the sleeve having an outward end extending from the outward end of the sleeve for engagement of a wrench to rotate the drill and the sleeve.

Abstract: A system and method for producing earth formation fluids such as crude oil using a lighter oil to force the crude oil to the surface and thereafter removing the lighter oil by gas lift techniques. The well system includes spaced packers defining a production chamber in the well bore, a production tubing extending through the packers having check valves and ports for well fluids to flow into the chamber from below the packer while isolating the chamber from the pressure of production fluids in the production tubing. Power fluid tubing extends through the upper packer into the production chamber including spaced gas lift valves and gas flow means from the lowermost gas lift valve into the production chamber. Surface equipment is provided for pumping power fluid into the power fluid tubing string, introducing lift gas into the power fluid tubing string above the upper packer, and separating returned power fluid and lift gas.

Abstract: A plug for coupling to the mandrel of a well packer, to convert the packer to a bridge plug, includes an equalizing valve. A fixed component of the plug is an elongated tubular member coupled to the upper end of the packer mandrel and closed at its upper end, and having longitudinally elongated ports in its side walls. The movable component of the plug includes an outer housing for receiving the upper portion of the fixed component and an inner sleeve coupled to the outer housing by means of pins extending through the elongated ports. Seals between the fixed components and the inner sleeve seal the elongated ports in the closed condition of the valve. In the open condition of the valve, ports in the inner sleeve and the outer housing communicate with the elongated ports of the fixed component. The movable component includes a fishing neck attached to the upper end of the outer housing.

Abstract: A portable mobile foldable table including a foldable frame having rigidly connected upper and lower side rails and legs, inwardly foldable end rail assemblies, and upper and lower trays which fit within the framework of the upper and lower side and end rail assemblies rigidly locking the frame in operating position. Shoulder surfaces along the side rails with an engageable relationship between the top edges of the end rail assemblies with end handles on the trays provides support at tray ends as well as support along the full lengths of the opposite sides of the trays. The spacing between the legs, side rails, and folded end rail assemblies provides storage space within the folded frame for two trays which are slightly longer than the distance between the legs at opposite ends of the frame assembly so that the trays rest on the folded lower end rail assemblies contained between the legs on opposite sides of the frame for tray storage when the frame is fully folded.

Abstract: A hydraulic running and setting tool for a well packer including an annular cylinder body having a top sub for connection with a tubing handling string, a longitudinal operator tube releasably secured at a first upper end in the top sub, a first locking collet assembly for releasably coupling with a packer body including a collet connected with the top sub and a collet locking surface along the second end of the operator tube, an annular piston in the cylinder body, and a second locking collet assembly releasably connected with the piston for operating a packer setting sleeve. Shear pins in the running tool isolated from weight forces applied to the running tool by the packer control the setting sequence while the packer remains fully coupled by the first collet assembly.

Abstract: An electrical lighting system for a tree especially adapted to an artificial Christmas tree having removable limbs. The system includes electrical conducting distribution straps or bands which may be wrapped around and secured to a tree trunk at selected levels. Each of the distribution bands has prong means and electric lead and plug means for interconnecting the bands along the tree trunk and a plurality of spaced apertures for insertion of male electrical plugs around each of the bands on the tree trunk. Also included are electrical branch circuits having a plurality of sockets and bulbs for mounting on each of the removable tree limbs, each of the circuits having a male plug connectible with the spaced apertures on the nearest distribution band for supplying electricity from the band to the branch circuit.

Abstract: A cover for an air vent opening in a building comprising a generally rectangular housing portion have a central panel, side and end walls, and provided with a mounting peripheral flange formed by side and end flanges extending in a plane substantially parallel with the plane of the central panel portion of the vent enclosure part of the cover. The end flanges are provided with keyways having round portions and narrower slot portions through the end flanges along a latching surface in each of the flanges which is an inclined plane providing a flange thickness greater along the slotted than along the round portions of the keyways. The cover is held in place by screws fitting through the keyways and wedged with the latch surfaces on the end flanges of the cover by moving the cover laterally.

Abstract: The pump or pumps for supplying fluid to the two ends of a double-acting cylinder include a direction control, such as a direction control valve, shiftable between extend and retract conditions. A drive mechanism for the direction control includes a rotary hydraulic motor and a driven rotary drive mechanism for shifting the direction control. Hydraulic fluid is supplied to the drive motor through parallel connected start and stop valves. The start valve is opened in response to the movements of the hydraulic cylinder toward a stroke limit. The stop valve is operated in response to the shifting of the direction control, so that the motor is operated intermittently to reverse the direction control when the cylinder reaches the limit of an extend or retract stroke. The stop valve is controlled by the drive mechanism in timed relation with the shifting of the direction control. The start valve may be closed by that drive mechanism in timed relation with the opening of the stop valve.

Abstract: A well completion and testing system and method. The system includes a tubing string having an integral locking sub and a testing probe assembly for use with well testing instruments and having an equalizing and bypass valve, the probe assembly being releasably lockable in the locking sub and adapted to be manipulated from the surface to open and close the valve for testing a well under both shut in conditions and flowing conditions. The method includes running a tubing string including an integral locking sub into a well bore, running a tool train including well testing instruments connected with a locking probe having an equalizing and bypass valve, releasably locking the probe in the locking sub of the tubing string, and selectively manipulating the probe from the surface to open and close the valve of the probe while taking measurements with the well alternately shut in and flowing.

Abstract: Saw guide for a power-driven circular hand saw machine or jig saw machine having a base plate (1), a saw blade (4) extending through the base plate (1), a driving motor (2) and a handle (6) with operating switch (7) for the driving motor (2), which saw guide consists of a bar member (13) provided with a graduation and attachable to the base plate (1) of the machine perpendicular to the base plate (1) and of a gauge member (14, 33), which gauge member (14, 33) is shiftable along and fixable on the bar member (13) by means of a sliding member (15), which is provided with one or more indicators (17-21) for the graduation on the bar member (13), which bar member (13) is adapted in use with one end (13a) to be fixed to the base plate (1), whereby means are present for compensating a possible deviation between saw blade (4) and longitudinal axis of the base plate (1), which means can be present either at the connection between the end of the bar member (13) to the base plate (1) and/or the gauge member (14).

Abstract: A side pocket mandrel has an elongated receptacle in the side pocket, parallel with the main bore. A lateral side port communicates the receptacle with the exterior of the side pocket of the mandrel. A flow control assembly includes a sliding sleeve valve and a control valve, both designed to be removable from the receptacle. The sleeve valve is movable within the receptacle between a closed position and an open position relative to the side port, and includes collet fingers having outwardly projecting latching lugs for engagement in a receptacle latching recess in the closed position. The bore of the receptacle is slightly larger below the latching recess than it is above the recess, so that limited inward movement of the latching lugs, restrained by an insert within the sleeve valve, will permit movement of the valve downward to the open position but will not allow movement of the valve upward from the closed position, so long as the insert is in place.

Abstract: A well packer for high pressure and temperature use having a tubular mandrel, upper and lower slip assemblies in spaced relation on the mandrel and a high temperature and pressure seal assembly including a plurality of annular elements of different elasticities mounted on the mandrel between the slip assemblies. The slip assemblies are arranged so that the lower slip assembly sets first and the upper slip assembly last while the upper slip assembly releases first and the lower slip assembly releases last when pulling the packer. The upper slip assembly includes a collet expander wedge and a support ring for holding the collet wedge expanded and releasing the collet wedge in running and pulling the packer. The packer is designed for temperatures at least as high as 600.degree. F. and pressures of at least 5000 psi.

Abstract: A method and apparatus for pumping a well using a jet pump. The method comprises pumping a power fluid downwardly in a first flow path in a well, directing the power fluid along a second flow path through a jet pump back to the surface, introducing produced fluids into the jet pump from below the pump, mixing the produced fluids with the power fluid in the pump, and pumping the fluid mixture to the surface through the second flow path along a substantially straight line from the zone of mixing in the pump.

Abstract: An inner mandrel extends the full length of the bridge plug, and carries a top sub at its upper end for latching engagement with a conventional overshot to retrieve the plug. A tubular outer mandrel is slidably mounted on the inner mandrel for limited axial sliding movement. A partial central bore in the inner mandrel and coacting ports adjacent the upper ends of the two mandrels provide a valved bypass passage bridging the seal element. External slips are carried in a slip carrier axially fixed to the inner mandrel by shear screws. A tubular setting assembly consisting of a lower top wedge for expanding the external slips, an upper compression member, and an annular elastic seal element disposed for compression between the wedge and compression member, is yieldably secured to the outer mandrel by means of shear pins. Second yieldable shear pins couple the top wedge and compression member.

Abstract: A side pocket mandrel designed primarily for controlling the flow of production fluid into a tubing string includes a sliding sleeve valve in the side wall receptacle for alternatively closing and opening the entry port into the receptacle. The sleeve valve is latched in its port-closing position, but is designed to enable removal from the receptacle bore for servicing; and a pulling tool is provided for removing the sleeve valve from the receptacle when desired. The sleeve is shifted to its port-opening position when a standing flow control valve is placed in the receptacle; and the standing valve has a large valve chamber and side entry and exit ports for the production fluid to provide for maximum flow. The standing valve provides a check valve into the producing zone, the valve closure member being a modified ball consisting of a cylindrical body with spherical ends and coacting with a spherical valve seat.