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Matches 451 - 500 out of 811

Document Document Title
WO/1999/018354A2
A walking beam compressor has a rod collar assembly attached to the top cap of the compressor cylinder with bearings which reduce side loading on the seals and bearing surfaces in the top cap. A top cap assembly supports a pair of vertic...  
WO/1999/007979A1
A down-hole production pump and circulation tool (1, Fig. 1), on a production string end (Fig. 3), including combined traveling valve assembly bottom connector (10) and fishing tool section (20, Fig. 2) engaging gripping pins (51) for tw...  
WO/1999/004166A1
The present invention relates to a pumping apparatus that comprises an additional system for supplying it with a driving fluid. This system comprises a device for the inlet of the driving fluid and for the outlet of gaseous medium as wel...  
WO/1998/055766A1
A hydraulic pump jack drive system (1) for reciprocating an oil well pump rod (6). The drive system comprises at least one hydraulic well head cylinder (2), a reversible flow hydraulic pump (7), and a master cylinder (8). The master cyli...  
WO/1997/049897A1
This invention relates to a fluid transfer system including two elongated fluid transfer chambers (10, 10') fluid inlet and outlet arrangements at each end of each chamber, oppositely directed one-way inlet and outlet valves in the inlet...  
WO/1997/038207A1
The operation of an oil well pumping unit control system (20, 200) is governed by a computerized automated control unit (88) that receives flow rate measurements from a Coriolis flow meter (28). The control unit causes production from a ...  
WO/1997/037131A1
An electric pump including a linear motor (34) consisting of a stator (40) and a moving element (42) driven by the electromagnetic field generated by the stator, and a pump piston driven by the linear motor, is disclosed. The piston (42)...  
WO/1997/037128A1
The present invention provides a device for actuating a sucker rod assembly, the device comprising an electric linear motor (14), which includes an armature (12) and a stator (18), positioned about an axis of operation of the sucker rod ...  
WO/1997/010437A1
A braking mechanism, for controlling the release of energy in a rod string (34) for a down-well rotary pump (33), incorporates a rotary member (16) positioned in the energy loop from a prime mover to the top end of the rod string, requir...  
WO/1997/002403A1
A fluid recovery system for producing subsurface oil and water deposits comprises a high capacity pump such as a high capacity centrifugal pump (12) that is immersed within the deposit, a well casing (23) that extends into the deposit fr...  
WO/1996/035055A1
A vertically reciprocating pump is described, characterised by a piston (8) which has a support (81, 82, 83) including a hub extending downwards and supporting reinforcement legs, the hub having a rod (7, 71, 72) to which it is translata...  
WO/1996/012866A1
The present invention provides a pumping system having parallel power tubing (12) and production tubing (13) strings in which production is pumped up the production tubing (13) through a flow control valve (32) and a rod (25) operated in...  
WO/1996/002731A1
The disclosed well pump (10) has a hydraulically actuated rim driven cylindrical pumping piston (70) assisted by an internal precharged gas return spring (116) all mounted coaxially within a pump housing cylinder (50) suitable for being ...  
WO/1995/035445A1
The invention relates to oil and gas extraction and can be used for the removal of liquid from oil, gas and gas-condensate wells. The proposed method involves periodically lowering a lowerable assembly into the pump column and subsequent...  
WO/1995/025226A1
A durable, economical, easy-to-repair device for elevating liquid through a well in a landfill or other geological site, comprising a casing for channeling liquid having inlet and outlet openings at either end, a removable, valve-contain...  
WO/1995/010707A1
A rod-driven, downhole pump (10) is disclosed, the pump including a traveling barrel (16) contained within a pump housing (14), a central pump rod (22) extending axially within the barrel, a valve ball (24) located at the lower end of th...  
WO/1995/005539A1
The proposed assembly comprises: a hydraulic cylinder (1) mounted with the aid of the head (2) above the mouth of the well (3); a damping device in the form of a spring-loaded sleeve (7) which co-operates with the piston (4) of the hydra...  
WO/1995/001508A1
A well head sucker rod pump comprises a cylindrical housing (1) with an inlet valve (3), a hollow plunger (2) with a pressure valve (18) designed in such a way that it can execute reciprocal motion along the length of the cylindrical hou...  
WO/1994/006997A1
A submersible well probe sleeve (10) made of a cylindrical tube (12) attached to a submersible pump (26). The cylindrical tube (12) has a number of slots (16, 18) exposing access to a protective pouch (30). Inside the protective pouch (3...  
WO/1994/000668A1
A pumping system including two pumps (7) operable in tandem is capable of developing a power of the order of 1000kW. The pumping system is used downhole in a reservoir to withdraw water at a sufficiently high rate or pressure to effect d...  
WO1993018306A3  
WO/1993/021442A1
A well pumping system includes a pivotally mounted walking beam (26) and "horsehead" (28) connected to a downhole pump by a pump rod (38). A hydraulic lift piston and cylinder (50) and a pneumatic balance piston and cylinder (48) are con...  
WO/1993/018306A2
A hydraulic oil well pump drive system (100) for driving an oil well sucker rod (not shown) includes a master piston (158) positioned within a master cylinder (156) for axial displacement between first and second ends of the master cylin...  
WO/1993/018302A1
Pumping apparatus (10) for recovering a first liquid, such as a pollutant (15), floating on a second liquid, such as ground water (14). A pump (24) immersed in the second liquid, or ground water, operates to produce a cone of depression ...  
WO/1993/013315A1
New apparatus and methods are disclosed for controlling the operation of a rod-pumped oil well (shown generally in Fig. 1). The load on (30, 32, 62, 100, 108) and position of (40, 48, 50, 64, 102, 108) the rod string (4, 8) are measured,...  
WO/1993/006370A1
Pump apparatus for pumping a fluid over a distance, such as from a fluid intake location to a fluid delivery location, comprising: a double acting slave pump at the fluid delivery location; a double acting main pump (11) located at the f...  
WO/1993/006369A1
A small diameter tubular linear motor (26) is relatively short in length, and includes a hollow elongated mover (27) having a traverse mover area Am, and a stator (25) having a plurality of annular spaced apart stator teeth (50-61) each ...  
WO/1993/002210A1
The present invention is directed to systems and methods for preserving, transporting, storing, re-hydrating and delivering viable microorganisms. More particularly, the present invention is directed to a kit and method for preserving an...  
WO/1993/002289A1
Apparatus and methods are disclosed for controlling the operation of a rod-pumped oil well using calculated downhole performance of the subterranean pump (6). The surface load and position are measured at equal increments of time. The me...  
WO/1992/021881A1
Grooves (20-27) in equal number are formed on the end surfaces (19a and 19b) of a roller (19), respectively, communicating portions (20a-27a) for establishing communication between the above-mentioned grooves and the inner periphery of t...  
WO/1992/021880A1
A new and improved control system for monitoring and controlling the operation of a downhole linear d.c. motor-pump assembly (10) and a method of using it for producing a sufficient reciprocating pumping action to lift well fluid through...  
WO/1992/014929A1
A liquid pump apparatus (520) is disclosed for pumping groundwater samples, contaminants or other fluids from a well (512), monitoring site, tank, vessel, or the like. The pump apparatus (520) is applicable in systems including dedicated...  
WO/1992/012346A1
A pump (40) having longitudinal hollow member (42) with a non-return valve (46) at its inlet end (44) and a plurality of serially connected spaced apart pistons (68), said pistons (68) allowing flow of fluid past or through said pistons ...  
WO/1991/014114A1
A pumping mechanism (24) particularly adapted for coupling a rotating prime mover (22) to the sucker rod (36) of an oil well lift pump (26) is disclosed. A linkage assembly (44, 46, 48) comprised of a V-shaped floating link (44) and two ...  
WO/1990/013744A1
A method and apparatus for pumping fluids from a well using a walking beam (10) which is connected to the pump rod (17) at one end (11) located above the well and which carries a counterweight (Wc) at the opposite balancing end (12), the...  
WO/1990/008898A1
A submersible positive-displacement pump comprises a pump housing (10A/10B) having an inlet (11) at its lower portion and an outlet (17-19) at its upper portion, a variable-volume pump chamber (21) which is provided at the lower portion ...  
WO/1990/007215A1
The invention concerns a motor-driven unit (10) for an alternating vertical pump consisting of a pumping device (4) located on the lower end of an actuating string of boring rods (5) which comprises a linear electric motor (12) whose fie...  
WO1989011038A3  
WO/1989/011038A2
A device for pumping a multiphase fluid comprises in combination an intake pipe (13) for the fluid to be pumped and a delivery pipe (19) for the pumped fluid, at least one variable volume chamber (2) suitable for pumping said fluid, said...  
WO/1989/007201A1
A piston-driven down hole pump (10) and a method for using the same to lift fluid on both its upstroke and downstroke. The pump is powered by a waste water injection pump (216). A drive piston (18) connected to a production piston (20) a...  
WO/1988/004365A1
A well pump includes a piston and an inlet and/or outlet valve assembly of special structure. Each is formed of a body of organic polymer, preferably PTFE. Each includes a cavity in its upper portion and at least one passage leading from...  
WO/1987/007684A1
A fluid pump operated by a lever (13). The lever is journalled to a pumpstand (14) by means of a number of elastic elements (18) positioned between noncircular surfaces (16, 17) of the lever and the pumpstand. The lever is connected to t...  
WO/1987/006653A1
Method and apparatus for pumping production fluid up a production tube from a well. A hydraulic actuator unit, (100, 160, 200) with its own hydraulic fluid incorporates pressure sensing valves (40, 42, 54, 76, 141, 228, 236, 238) to move...  
WO/1987/005974A1
A bladder pump (40) is suspended in a tubular air lift pump housing (14) which is closed at its lower end by a check valve (19), and which is connected at its upper end by a first conduit (25) and a separator (24) selectively to a supply...  
WO/1987/004498A1
A pump arrangement particularly intended for pumping water from deep wells, in which a feed pump unit (2) located at ground level transmits power and motion to a delivery pump unit (3), so that during a working stroke of the pump arrange...  
WO/1987/003935A1
A device for pumping a fluid medium comprising a casing (1), the cavity (4) in the upper part (2) of which is connected through selector valves (5, 9) to the atmosphere and to an inlet main (6), whereas in the lower part (3) of the casin...  
WO/1987/003649A1
A submersible well pump of the barrel (2) and piston (6) type characterised by a valve chamber (5) formed coextensively with the barrel (2) and containing an inlet valve (4) and an outlet valve (8) arranged to admit fluid to one end of t...  
WO/1987/002100A1
A displacement piston pump incorporating a driving pump (11), which via a conduit hydraulically drives a lifting pump (12) provided with a spring loaded differential piston (23). The pistons (15, 23) of the pumps are designed with throug...  
WO/1986/003262A1
A hydraulically powered reciprocating downhole pump having improved means for reliable and efficient operation in which a reversing valve (8) is hydraulically shifted past center position so as to effect a smooth continuous operation. In...  
WO/1986/003250A1
Method and means to pump a well with a hydraulically-driven downhole pump (15) as powered by a hydraulic surface unit (1), including a downhole filter assembly (71) and a flowline mounted oil leach (27) for supplying makeup oil to the su...  

Matches 451 - 500 out of 811