| 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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| 06/15/2005 | CA2450766A1 A method and apparatus for monitoring and diagnosis of well progressing cavity pump systems |
| 06/14/2005 | US6905114 Shock absorbing and shock force generating apparatus with shear pin for an oil pump and method therefor |
| 06/14/2005 | US6904973 Downhole pump |
| 06/08/2005 | CN2703898Y Three-layer individual-pumping co-producing pump |
| 06/08/2005 | CN2703897Y Split double-layer individual-pumping co-producing pump |
| 06/08/2005 | CN2703894Y Step double-layer indivisual-pumping co-producing pump |
| 06/08/2005 | CN1205411C Beam-pumping unit |
| 06/02/2005 | WO2005050022A1 Deep well irrigation pump |
| 05/26/2005 | US20050109515 System and Method for a Combined Submersible Motor and Protector |
| 05/25/2005 | CN2702085Y Long plunger telescoped feedback type thick oil pump |
| 05/25/2005 | CN2702084Y Oil-well pump without plunger piston and rigid pump barrel |
| 05/25/2005 | CN2702083Y Pressure regulation and reactive compensation controlling device of beam-pumping unit |
| 05/25/2005 | CN1619146A Horizontal oil-well pump |
| 05/18/2005 | CN2700603Y Thread off prevention connecting device for pumping rod |
| 05/18/2005 | CN2700602Y Electric submersible pump for well |
| 05/11/2005 | CN2699005Y Beam-pumping unit using decelerator as bob-weight |
| 05/11/2005 | CN2699004Y Beam-pumping unit using reduction box and electric machine as bob-weight |
| 05/11/2005 | CN2699003Y Hollow oil-well pump |
| 05/10/2005 | US6890156 Reciprocating pump control system |
| 05/10/2005 | US6889765 Submersible well pumping system with improved flow switching mechanism |
| 05/06/2005 | WO2005017299A3 Pump for tail production of oil |
| 05/05/2005 | US20050095140 Rod saver speed control method and apparatus |
| 05/04/2005 | CN2697348Y Load distributed hydraulic conveying pump |
| 04/28/2005 | WO2004094770B1 Downhole pump |
| 04/28/2005 | US20050089425 Beam pump dynamic load monitoring and methods |
| 04/27/2005 | CN2695681Y Semi-ball self-rotation high-efficient energy-saving anti-sand pump |
| 04/27/2005 | CN2695679Y Oil-well pump |
| 04/27/2005 | CN2695678Y Rotation sand pump |
| 04/27/2005 | CN2695677Y Plunger contraction-expansion self-rotation whole cylinder oil-well pump |
| 04/27/2005 | CN2695676Y Electromagnetic driving device |
| 04/27/2005 | CN2695675Y Gum filling type self-aligning polish rod sealing device |
| 04/27/2005 | CN1609448A Full-protection settling antiseizing oil-well pump |
| 04/26/2005 | US6883612 Rod pump |
| 04/21/2005 | US20050082065 Pass through valve and stab tool |
| 04/20/2005 | CN2693991Y Large path thick oil pump |
| 04/20/2005 | CN2693990Y Inner offset gas sand anchor |
| 04/20/2005 | CN2693989Y Immerging type oil-well pump with gas-tight, sand-proof, and thick oil pumping functions |
| 04/20/2005 | CN2693988Y Large path sand-proof thick oil pump |
| 04/20/2005 | CN2693987Y Oil pump with soft sealing plunger |
| 04/20/2005 | CN2693986Y Sand preventing oil well pump |
| 04/14/2005 | US20050077040 Water pressure system with pressure tank installed within well casing of well |
| 04/13/2005 | CN2692377Y Oil well pump drop proof fixing valve |
| 04/13/2005 | CN1605756A Eccentric l wear prevention oil-well pump |
| 04/06/2005 | CN2690625Y Double pumping tube high efficiency oil pumping tube type pump |
| 04/06/2005 | CN2690623Y Hydraulic balancing oil pump |
| 04/06/2005 | CN2690622Y Fraturing fluid reverse pump |
| 04/06/2005 | CN2690621Y Pumping aid |
| 04/01/2005 | CA2749586A1 System and method for a combined submersible motor and protector |
| 03/30/2005 | CN2688929Y Piston body of plunger piston |
| 03/30/2005 | CN2688927Y Salt-proof pumping units |
| 03/30/2005 | CN1602387A Downhole well pump |
| 03/30/2005 | CN1601083A Oil production method with no pole and oil production system |
| 03/24/2005 | WO2005001231A3 Submersible pump |
| 03/24/2005 | US20050063848 Double-acting reciprocating downhole pump |
| 03/23/2005 | CN2687377Y Whirl saud-scraping oil-well pump |
| 03/23/2005 | CN2687375Y Dropping-proof fixed valve assembly |
| 03/23/2005 | CN2687183Y Hand water well |
| 03/23/2005 | CN1598310A Scrow oil pumping pump |
| 03/23/2005 | CN1598309A Mfg. Method for integral cylinder stainless steel oil pumping pump |
| 03/22/2005 | CA2325047C Submersible pump for use in a bore hole |
| 03/22/2005 | CA2194257C Recirculation pumping system for installation below the perforations in a cased well bore |
| 03/17/2005 | DE19581945B4 Antriebskopf für eine Bohrlochpumpe Drive head for a downhole pump |
| 03/16/2005 | CN2685605Y Bottom fixing suspension sedimentation oil-well pump |
| 03/16/2005 | CN2685604Y Single-plate double-side stator type linear motor beam-pumping unit |
| 03/16/2005 | CN1596342A Control system for a pumping unit |
| 03/10/2005 | US20050053503 Anti gas-lock pumping system |
| 03/09/2005 | CN2683945Y Shaft end sealing device of horizontal oil submersible pump |
| 03/09/2005 | CN2683896Y Automatic intermittent pumping wireless group control device of pumping unit |
| 03/05/2005 | CA2479464A1 Anti gas-lock pumping system |
| 03/03/2005 | DE202004015718U1 Pressure medium operated pump for delivery of fluids has tubular housing sealed at each end by plug incorporating check valve, and elastic sleeve or bag with impenetrable walls installed inside housing to act as displacer |
| 03/02/2005 | CN1587751A Rotary positive displacement hydraulic device and hydraulic driving type petroleum production oil pump |
| 03/02/2005 | CN1587709A Strong anti-thickening anti-sand hydraulic feedback oil pump with long plug ring seal and oil inlet sand deposition path |
| 03/02/2005 | CN1587708A Plunger type oil pump driven by linear motor |
| 03/02/2005 | CN1587707A Hydraulic oil pump |
| 03/02/2005 | CN1587706A Rodless hydraulic oil pumping system |
| 02/24/2005 | WO2005017354A2 Portable, surface-mounted well pump |
| 02/24/2005 | WO2005017299A2 Pump for tail production of oil |
| 02/24/2005 | WO2004094770A3 Downhole pump |
| 02/24/2005 | CA2532224A1 A piston pump for tail production of oil |
| 02/23/2005 | CN1584333A Gear and rack type cooker hood |
| 02/17/2005 | WO2005015024A1 Galvanic corrosion protection apparatus for a pump |
| 02/16/2005 | CN1580560A Gear-type-changing oil pumping device of pump with rod |
| 02/16/2005 | CN1580559A Multifunctional high-efficiency oil pump |
| 02/15/2005 | US6854515 Wellhead hydraulic drive unit |
| 02/15/2005 | CA2282822C Swivelling device for a downhole rod pump |
| 02/09/2005 | CN2677663Y Reducing back-stop hydraulic pumping device |
| 02/09/2005 | CN2677662Y Pumping hydraulic sand washing apparatus |
| 02/09/2005 | CN1188598C Submerged-in-oil electric piston pump |
| 02/03/2005 | US20050025645 Debris evacuation apparatus and method for an oil pump |
| 02/03/2005 | US20050025644 Debris evacuation apparatus and method for an oil pump |
| 02/03/2005 | US20050025629 Method for protecting pump components |
| 02/03/2005 | US20050023739 Shock absorbing and shock force generating apparatus and method for an oil pump |
| 02/03/2005 | US20050022663 Method for protecting pump components |
| 02/02/2005 | CN2675901Y Rotary sand-proof oil-well pump |
| 02/01/2005 | CA2322407C Curved-beam pumping unit |
| 01/26/2005 | CN2674153Y Long trunk piston, double fixation valve pump |
| 01/26/2005 | CN2674152Y Forced oil increasing means for oil well |
| 01/26/2005 | CN2674151Y Air sand pump |
| 01/26/2005 | CN2674150Y Double motor balancing type ground driving equipment for screw rod pump |
| 01/26/2005 | CN2674149Y Ground driving means for hydraulic transmission screw rod pump |