| 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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| 04/20/2006 | US20060083632 Pump |
| 04/20/2006 | US20060081380 Collar locator for slick pump |
| 04/19/2006 | CN2773347Y Pressure-differential one-way triple-flow valve |
| 04/19/2006 | CN2773345Y Plunger-type oil-well pump with direct underground dynamic drive |
| 04/19/2006 | CN1760551A Electricity saving method of walking beam type pumping unit, and electricity saving mode walking beam typed pumping unit |
| 04/18/2006 | CA2375308C System for and a method of pumping fluids from a well |
| 04/13/2006 | DE102004049528A1 Hydraulic or pneumatic pump to supply liquids has pump housing in elongated form of tube or low-elasticity hose, with plugs at both ends containing no-return valves |
| 04/12/2006 | EP1295035B1 Isolation container for a downhole electric pump |
| 04/12/2006 | CN2771517Y Counter-flow-proof oil nozzle |
| 04/12/2006 | CN2771515Y Protective pump line equipment for electric oil-submersible pump production opreation |
| 04/05/2006 | EP1642029A2 Pump for tail production of oil |
| 04/05/2006 | CN2769552Y Tower type hydraulic long-stroke beam-pumping unit |
| 04/05/2006 | CN2769551Y Pulley wheel type beam-pumping unit |
| 04/05/2006 | CN2769506Y Underwell oil production tool |
| 04/04/2006 | US7021387 Wellbore pump |
| 04/04/2006 | CA2373733C Full flow tubing stationary valve pump apparatus |
| 03/30/2006 | WO2006032145A1 Plunger lift system |
| 03/29/2006 | CN2767703Y Double-screw down-hole oil well pump |
| 03/29/2006 | CN2767658Y Two-tube inserting apparatus |
| 03/23/2006 | CA2520260A1 A pumping unit with variable work stroke and return stroke torque factor characteristics |
| 03/22/2006 | CN1749566A Digital control reciprocating oil submersible electric pump |
| 03/22/2006 | CN1749426A Anti-corrosion oil pumping rod and its producing method |
| 03/16/2006 | WO2006027562A1 Wellbore-external underwater pump |
| 03/15/2006 | CN2764965Y Weighting type oil well pump |
| 03/15/2006 | CN1746499A Lifter of linear motor with double action for reciprocating pump |
| 03/08/2006 | CN2763577Y Multifuncltion pump valve |
| 03/08/2006 | CN2763576Y Protector for oil pump |
| 03/08/2006 | CN2763575Y Hydraulic oil pump |
| 03/08/2006 | CN2763500Y Desilting protector for surmerged pump in oil well |
| 03/08/2006 | CN2763499Y Corrosion-resisting blasting type oil releaser |
| 03/07/2006 | US7008197 Debris evacuation apparatus and method for an oil pump |
| 03/01/2006 | EP1629195A2 Hydrodynamic bearing runner for use in tilting pad thrust bearing assemblies for electric submersible pumps |
| 03/01/2006 | CN2761875Y Ultrahigh strength high corrosion-proof stainless steel integrated cylinder oil-well pump |
| 03/01/2006 | CN2761873Y Sand proof, anti blocking oil extraction pump |
| 03/01/2006 | CN2761872Y Oil injection proof anti blocking device of pump |
| 03/01/2006 | CN1740567A Hydraulic oil pumping unit for inclined well |
| 02/22/2006 | CN2760287Y Special purpose steel wire rope adhesive tape joint for oil extractor |
| 02/22/2006 | CN1738973A Gravity water pumps that pump fluid by gravity |
| 02/21/2006 | US7001157 Well pumping unit driven by linear motor |
| 02/16/2006 | WO2006017338A2 Centrifugal pump |
| 02/15/2006 | CN2758523Y Low speed piston pump |
| 02/15/2006 | CN2758522Y Boosting pump for hydraulic starting thick oil |
| 02/15/2006 | CN2758465Y Rotary release proof sand carrier |
| 02/08/2006 | CN2756865Y Multifunction deep well pump |
| 02/08/2006 | CN1730943A Negative pressure oil-well pump |
| 02/08/2006 | CN1730942A Vortex oil-well pump |
| 02/01/2006 | CN2755314Y Bearing short joint of electric submarine oil pump |
| 02/01/2006 | CN2755312Y Heavy long-travel pumping unit |
| 02/01/2006 | CN1239825C Combination oil-well pump |
| 01/26/2006 | US20060018776 Piston pump |
| 01/26/2006 | US20060016591 Apparatus and method for agitating reservoir while pumping |
| 01/25/2006 | CN2753909Y Submersible long-shaft relay deep-well pump |
| 01/25/2006 | CN2753898Y Moving-drum type air-trapping oil-pump |
| 01/19/2006 | US20060013707 Centrifugal pump |
| 01/18/2006 | CN2752485Y Underground antiturning-back device for screw pump |
| 01/18/2006 | CN2752484Y Oil well separate extracting pump |
| 01/18/2006 | CN2752483Y Particle deposition preventing oil-well pump |
| 01/18/2006 | CN2752482Y Moving back circulating hydraulic jet pump temporary forced sand removing device |
| 01/13/2006 | CA2475815A1 Power system powered by gas line |
| 01/12/2006 | US20060008364 Plunger actuated pumping system |
| 01/11/2006 | EP1614898A1 Isolation container for a downhole electric pump |
| 01/11/2006 | CN2751158Y Mechanical braking and auxiliary reversing device for full-balanced belt type long-stroke pumping unit |
| 01/11/2006 | CN1719032A Steel wire cable type electro immersion permanent magnet linear reciprocating pump |
| 01/05/2006 | WO2005017354A3 Portable, surface-mounted well pump |
| 01/05/2006 | US20060002808 Mechanically actuated gas separator for downhole pump |
| 01/04/2006 | CN2750076Y Electrically controlled energy saving device for pumping unit |
| 12/29/2005 | US20050287017 Saturation-proof hydraulic control device that is composed of two or more elements |
| 12/28/2005 | EP1610002A1 Saturation-proof hydraulic control device with two or more elements |
| 12/28/2005 | CN2748668Y Adjustable rotary pump bumping device |
| 12/27/2005 | US6978830 Downhole latch |
| 12/27/2005 | CA2241223C Stuffing box gland |
| 12/22/2005 | WO2005121507A1 System and method for determining pump underperformance |
| 12/18/2005 | CA2510240A1 Apparatus and method for agitating reservoir while pumping |
| 12/08/2005 | WO2005116451A1 Pump for evacuation of viscous liquids |
| 12/06/2005 | US6971856 Plunger for well casings and other tubulars |
| 12/01/2005 | US20050265875 Wear rings for downhole pump |
| 12/01/2005 | US20050265874 Submersible pump |
| 11/24/2005 | US20050257927 Valve cage insert |
| 11/23/2005 | CN2742188Y Electric submerged plunger oil pumping unit |
| 11/23/2005 | CN2742187Y Anti-wear multistage centrafugal pump |
| 11/23/2005 | CN2742186Y Single screw sand sinking oil pumping unit |
| 11/22/2005 | US6966248 Adjustable valve rod and pull tube guide for downhole pumps |
| 11/22/2005 | CA2408795C Method for boosting the output voltage of a variable frequency drive |
| 11/22/2005 | CA2301791C Plunger lift with multipart piston |
| 11/17/2005 | WO2005108790A1 Valve cap |
| 11/17/2005 | WO2005108743A1 Method and apparatus to remove liquids from a well |
| 11/16/2005 | CN2740811Y Symmetric sliding connecting rod reducer of beam pumping unit |
| 11/16/2005 | CN2740810Y Plunger-type oil sucking pump driven by linear electric motor |
| 11/16/2005 | CN2740809Y Energy-saving oil sucking pump actuated by gravity of sucker rod |
| 11/16/2005 | CN2740808Y Screw-rod oil sucking pump |
| 11/16/2005 | CN1696507A Contracting and expanding plunger type oil pump of self-revolving integral drum |
| 11/10/2005 | US20050251362 System and method for determining pump underperformance |
| 11/10/2005 | US20050249614 Pump for evacuation of viscous liquids |
| 11/10/2005 | US20050249613 Apparatus and method |
| 11/08/2005 | US6962213 Sleeve piston fluid motor |
| 11/08/2005 | US6962204 Isolation container for a downhole electric pump |
| 11/02/2005 | CN2737990Y Electric oil-submersible sandproof pump |
| 11/02/2005 | CN2737989Y Plunger bottom weighting anti-offset wearing oil-well pump |
| 11/02/2005 | CN2737988Y Anti-sand seizing screw pump |
| 11/02/2005 | CN2737987Y Anti-sand seizing telescopic feedback type pumping thick oil pump |