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Patent Searching and Data


Matches 451 - 500 out of 778

Document Document Title
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...  
WO/1986/002971A1
A downhole hydraulically operated oilwell pump (12) having means for mounting and methods for mounting and for operating that improve performance and extend useful life by negating sand effects and gas locking tendencies. A remotely and ...  
WO/1986/002412A1
A pumping apparatus (10) which includes a downhole reservoir unit (20), a pumping unit (18) and a power unit (102). The reservoir unit (20) has a piston assembly (70) with a top piston (72) and a bottom piston (74). A storage chamber (82...  
WO/1986/000962A1
A pump, particularly intended for use in pumping water from bore holes in the developing countries, comprises a cylindrical casing (2), the interior of which is divided into first and second chambers (12, 14) by a tubular flexible membra...  
WO/1986/000116A1
A bore hole pump which eliminates the need for a piston sealingly engaging with the walls of the pump body. The pump comprises a hollow body (11) closed at its lower end by a non-return inlet valve (13) and slidably and sealingly support...  
WO/1985/004691A1
The pump has a first pumping means (1) to be immersed into the liquid that is to be pumped, and a second means, driving pumping means (2), adapted to drive the first pumping means. The driving pumping means has a cylinder chamber (7) whi...  
WO/1984/001987A1
A pump jack for reciprocating a string of rods in a well in which a drive shaft (23) having an axis below the axis of a guide wheel (43) supported above the well has a crank arm (25) mounted to each end of the drive shaft (23) for rotati...  
WO/1984/001191A1
Methods and means wherein a downhole reciprocating oil well pump powered by a source of pressurized fluid via one tubing string (32) pumps liquid from the well through another tubing string (30). The downhole pump having internal means t...  
WO/1984/001002A1
A hydraulically actuated bore or well pump in which a driving unit (1) at the bore or well surface comprises interconnected pistons (6 and 7) arranged to hydraulically actuate a slave piston (27) in a submerged well or bore unit (2) thro...  
WO/1983/002805A1
Pump for liquids and gases, particularly for immersing in a well hole. A pump piston (35) is operated by a double acting operating piston (33) provided with working medium through a supply conduit (13). The supply of working medium to th...  
WO/1983/001817A1
A method, system, and apparatus for pumping liquid from a well such that vapor lock of the pump cannot occur due to gas or steam and such that the pump strokes only in response to the production rate of well liquid. The pumping chamber (...  
WO/1983/001658A1
An apparatus (3) for pumping fluid from a fluid source (5) to a predetermined location (7) remote from the fluid source. The apparatus (3) comprises an hydraulically operated pump (9) having a fluid pumping chamber and means for storing ...  
WO/1983/000203A1
A well pump includes a Sampson post (2) supporting a walking beam (1) which oscillates to cause a horsehead (3) to operate one or more sucker rods in a well bore. The invention avoids need for a flywheel, gearbox or other mechanical mean...  
WO/1982/000859A1
An oil well pumping apparatus which includes a submerged reciprocating pump (45) mounted in a tubing arrangement (40) communicating with the wellhead, a sucker rod string (67) extending through the tubing arrangement (40) and connected i...  
WO/1981/003206A1
An oil well pump driving unit with a horizontally disposed hydraulic cylinder (40) having a cylinder rod (41) coupled to a drive rope (31) extending into a pumping tee-stuffing box arrangement (30) for driving the sucker rod string (36) ...  
WO/1980/000173A1
A wind machine has a tower frame (12) formed by four converging beams. At the top of the tower is a gear head (26) connected to a wind driven rotatable multibladed rotor (48). Connected to the gear head is a vertical shaft (27) which is ...  
JP2018502240A
ダウンホールポンプの製造を決定する方法及 び器具。例示的方法は、所定期間中にポンピ ングユニットにより坑井から産出される液体 量を計測すること及び所定期間中の第1...  
JP2017523340A
A method and a device for determining a parameter of a pumping plant for use in a well are indicated. An exemplary device contains a processor arranged in a housing and a housing. A processor determines the 1st load in a polish rod of a ...  
JP2017514044A
By being related with the underwater motor pump protection pumping pipe for Fukai doors, the present invention can construct safely the pumping pipe installed in the Fukai door, and can pump it up now stably with an underwater motor pump...  
JP5824453B2  
JP2013504012A
[Means for Solution] When an electric motor of a pump jack may generate energy in the Kai loop mode, a system and a method of reducing energy consumed by a motor are provided by dropping service voltage to a motor. excepting energy gener...  
JP5022219B2  
JP2011032907A
To provide an effective and appropriate pumping device which can securely and efficiently perform pumping from a water area without the necessity of an intake pump and a pump pit therefor.A bubble emitting tube 13 with a bubble emitting ...  
JP4626057B2  
JP4614166B2  
JP4555832B2  
JP4475806B2  
JP2010101292A
To provide an effective and appropriate deep water intake installation, achieving stable operation without taking a higher safety factor with respect to a suction water head, and reasonable and economic design.In this deep water intake i...  
JP2010101291A
To provide a deep water intake installation and a method for operating the same, easily preventing adverse effect when a deep water pump is switched on/off.In this deep water intake installation pumping up and taking deep water from the ...  
JP4409672B2  
JP4299018B2  
JP4260979B2  
JP4172846B2  

Matches 451 - 500 out of 778