| Patents for F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (5,485) |
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| 01/26/2005 | CN2674148Y Tube like pump for feeding and sucking |
| 01/26/2005 | CN2674147Y High efficiency, energy-saving mechanical submersible pump |
| 01/26/2005 | CN2674146Y Scale-proof injection type oil sucking pump |
| 01/26/2005 | CN1570347A Six-rod phase conversion energy conservation walking beam type beam-pumping unit |
| 01/20/2005 | US20050013707 Portable, surface-mounted well pump |
| 01/19/2005 | CN2672325Y Mechanical seal device in ground driven single screw pump speed reducer |
| 01/19/2005 | CN2672323Y Spring reset inclined well oil pump fixed valve |
| 01/19/2005 | CN2672322Y Screw pump anti-slip device |
| 01/19/2005 | CN2672319Y Self compensation low friction resistance plunger pump |
| 01/19/2005 | CN2672318Y Sand scraper oil pump |
| 01/19/2005 | CN1566653A Protection type oil-well pump fixed valve assembly |
| 01/12/2005 | CN2670629Y Eccentrically worn preventor for piston pulling rod of oil sucking pump |
| 01/12/2005 | CN2670628Y Multifunctional oil sucking pumps |
| 01/12/2005 | CN2670626Y Rod oil-sucking pumps |
| 01/12/2005 | CN2670624Y Screw connected fishing eccentric underground controlling tool for oil and gas fields |
| 01/12/2005 | CN1563719A Linear dynamo pumping unit with built-in stator |
| 01/12/2005 | CN1563716A Pulley type flexible driving pumping unit |
| 01/11/2005 | US6840324 System for, and a method of pumping fluids from a well |
| 01/06/2005 | WO2005001231A2 Submersible pump |
| 01/05/2005 | CN2668887Y Outer-pipe-free movable-cylinder sand-proof desilting oil-well pump |
| 01/05/2005 | CN1560476A Oil production system with electric oil-submersible dule screw rod pump |
| 01/05/2005 | CN1183313C Steel cable lifting belt driving wheel for oil production machine |
| 12/29/2004 | CN2667201Y Anti-pump-out device for screw pump oil producing well |
| 12/29/2004 | CN2667196Y Parallel oil-well pump |
| 12/29/2004 | CN2667151Y Oil pipe hollow rod antiwear aid |
| 12/29/2004 | CN2666855Y Drum type chain driving vertical water lifting pump |
| 12/23/2004 | WO2004065792A3 Integrated control system for beam pump systems |
| 12/23/2004 | US20040256109 Downhole well pump |
| 12/22/2004 | CN2665404Y Oil thickening pump with a below-mounted weight adding device |
| 12/22/2004 | CN2665403Y Multi-stage diving pump |
| 12/22/2004 | CN1556328A Sand proof blade guiding wheel |
| 12/22/2004 | CN1556327A Bicavity oil pump |
| 12/22/2004 | CN1556326A Hollow oil pump |
| 12/22/2004 | CN1181256C Beam-balancing pumping unit without inertia force |
| 12/14/2004 | US6830441 Valve for downhole pump |
| 12/09/2004 | US20040245019 Sleeve piston fluid motor |
| 12/08/2004 | CN1179128C Sand-resistant oil-well pump |
| 12/02/2004 | US20040241024 Fluid balanced pump |
| 12/01/2004 | CN2660225Y Parameter regulating pulley |
| 12/01/2004 | CN2660168Y Pressure sucking pump of oil well |
| 12/01/2004 | CN2660167Y Low jig frequency energy saving driving gear of pumping unit |
| 12/01/2004 | CN2660166Y Through oil-well pump |
| 11/24/2004 | CN2658428Y Piston pump for stripper well |
| 11/24/2004 | CN2658427Y High-strength oil-well pump |
| 11/24/2004 | CN2658426Y Open-assisted valve for oil-well pump |
| 11/24/2004 | CN2658425Y Intelligent network system for beam-pumping unit |
| 11/24/2004 | CN2658424Y Combination seal type oil-well pump plunger |
| 11/24/2004 | CN2658423Y Oil-well pump with double-plunger for steam injection and oil pumping |
| 11/23/2004 | CA2120187C Pumping device having two suction ports - application to a subhorizontal drain |
| 11/18/2004 | WO2004099618A1 Downhole sucker-rod pumping plant |
| 11/18/2004 | US20040226713 Plunger for gas wells |
| 11/18/2004 | CA2565302A1 Downhole sucker-rod pumping plant |
| 11/17/2004 | CN1176301C Pumping unit with lower centroidal and balanced running beam |
| 11/16/2004 | US6817409 Double-acting reciprocating downhole pump |
| 11/10/2004 | CN2654902Y Oil pump with external oil inlet and outlet valve |
| 11/10/2004 | CN2654901Y Anti-sand seizing thickening deep-pumping pump |
| 11/04/2004 | WO2004094770A2 Downhole pump |
| 11/04/2004 | CA2521102A1 Downhole pump |
| 10/20/2004 | CN2649810Y Fixed valve for deep well pump |
| 10/20/2004 | CN1172076C Long-stroke pumping machine operating in differential reversing mode |
| 10/13/2004 | CN2648107Y Rotary impact pump type rope suspension device |
| 10/13/2004 | CN2648106Y Double-tunnel desilting connecting device under pump |
| 10/07/2004 | US20040194964 Downhole pump |
| 10/05/2004 | CA2226120C Improvements in deep well pumping apparatus |
| 09/29/2004 | CN2644706Y Rotary vere of borehole pump |
| 09/29/2004 | CN2644705Y Highly effective sand and thick prevention expansion plunger oil well pump |
| 09/29/2004 | CN2644704Y Blowout prevention touch switch of oil well pump |
| 09/29/2004 | CN2644703Y 往复式直线电机抽油泵 Reciprocating linear motor pump |
| 09/15/2004 | CN2641320Y Positive flushing oil prodn. deep well tube type pump |
| 09/02/2004 | WO2004074637A2 Sleeve piston fluid motor |
| 09/01/2004 | CN2637768Y Moving drum type sand trap oil pump |
| 09/01/2004 | CN2637767Y Oil-well pump |
| 08/26/2004 | US20040165992 Plunger for a plunger-lift pumping system |
| 08/24/2004 | CA2419612A1 Plunger for a plunger-lift pumping system |
| 08/18/2004 | CN2634146Y Rod type integrated layered oil pump |
| 08/18/2004 | CN2634145Y Three stage layered oil pump |
| 08/18/2004 | CN2634144Y Novel combined plunger anti-clip oil pump |
| 08/18/2004 | CN2634143Y Rod type sand-proof oil pump |
| 08/18/2004 | CN1521399A Low friction resistance plunger pump |
| 08/17/2004 | CA2206726C Automatic downhole pump assembly and method for use of the same |
| 08/11/2004 | CN2632343Y Three-phase non-iron core winding permasyn linear motor beam-pumping untis |
| 08/11/2004 | CN2632342Y Separated extracting oil-well pumps |
| 08/11/2004 | CN2632341Y Ram rotary hollow sandproof oil-well pumps |
| 08/05/2004 | WO2004065792A2 Integrated control system for beam pump systems |
| 08/05/2004 | WO2004065791A1 Gravity water pumps that pump fluid by gravity |
| 08/04/2004 | CN1517550A Sand-resistant oil-well pump |
| 07/29/2004 | US20040144545 Fluid removal from gas wells |
| 07/29/2004 | US20040144529 Integrated control system for beam pump systems |
| 07/28/2004 | CN2628753Y Double-sealing long-acting oil-well pump |
| 07/28/2004 | CN1159514C Chain-rope beam pumping unit |
| 07/22/2004 | US20040140087 Rod pump |
| 07/21/2004 | CN2627241Y Double-acting type intelligent well pumping unit |
| 07/14/2004 | CN2625600Y Overpressure (overflow) type oil-pump fixing valve |
| 07/14/2004 | CN1157526C Ground-type multi-cable pumping unit |
| 07/08/2004 | US20040131488 Water well pump |
| 07/08/2004 | US20040131484 Well pumping unit driven by linear motor |
| 07/08/2004 | US20040131480 Bearing assembly for a progressive cavity pump and system for liquid lower zone disposal |
| 07/08/2004 | US20040129430 Downhole latch |
| 07/07/2004 | CN2623908Y High strength ring sealed tube pattern oil well pump |
| 07/07/2004 | CN1156647C Valve capable of raising the efficiency of oil pump |