| 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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| 09/16/2009 | CN101532488A Multifunctional linear sliding guide sleeve |
| 09/16/2009 | CN101532486A Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system |
| 09/15/2009 | CA2562070C System and method for determining pump underperformance |
| 09/09/2009 | EP1290780B1 Method for boosting the output voltage of a variable frequency drive |
| 09/09/2009 | CN201306268Y Self oil drain type low-resistance oil well pump |
| 09/09/2009 | CN201306267Y Oil well pump used for horizontal well |
| 09/09/2009 | CN201306266Y Drive mechanism for oil field oil extractor |
| 09/09/2009 | CN101526079A Multifunctional oil-extraction and gas-injection integrated oil well pump for sanding heavy crude oil well |
| 09/09/2009 | CN101525988A Weight box device of oil extractor |
| 09/08/2009 | CA2525201C Plunger lift apparatus that includes one or more sensors |
| 09/02/2009 | CN201301794Y Underground vane pump oil production plant |
| 09/02/2009 | CN101519954A Multifunctional combination operation process and device for injection pump unit |
| 08/27/2009 | WO2009103155A1 Artificial lift structures |
| 08/26/2009 | CN201297247Y Insertion type screw pump |
| 08/26/2009 | CN101514697A Pump for deep wells |
| 08/19/2009 | CN201293186Y Overturning motor bracket capable of rapidly changing belt |
| 08/19/2009 | CN201293036Y Crank-pin anti-releasing device |
| 08/19/2009 | CN201292939Y Oil pump for reducing sustained center load by pre-filled drive block |
| 08/19/2009 | CN201292938Y Oil pump valve with guide bars |
| 08/19/2009 | CN201292937Y Speed reducing and changing device for adjusting stroke frequency of pumping unit oil well |
| 08/19/2009 | CN201292831Y Screw pump oil production electric heater unit |
| 08/19/2009 | CA2654673A1 Artificial lift structures |
| 08/15/2009 | CA2641969A1 Method and system for repositioning a pump jack |
| 08/12/2009 | CN201288760Y Crankshaft pin anti- reversing device of beam-pumping unit |
| 08/12/2009 | CN201288656Y High efficient sealing screw pump driving apparatus |
| 08/12/2009 | CN201288655Y Pressure testing downhole oil production screw pump |
| 08/12/2009 | CN201288652Y Cavity type barometric pressure induction flow pump |
| 08/12/2009 | CN201288537Y Natural gas pumping apparatus |
| 08/12/2009 | CN201288535Y Down-hole direct-driving oil production system for oil-submersible servo motor |
| 08/12/2009 | CN201288534Y Oil pumping apparatus for implementing self-cleaning function of sand filtering tube by elasticity of oil pipe |
| 08/06/2009 | WO2009097338A2 Hydraulic oil well pumping apparatus |
| 08/06/2009 | WO2009096804A1 Oil filter for downhole motor |
| 08/06/2009 | US20090196779 Bypass valve and downhole pump |
| 08/06/2009 | US20090196774 System, method and apparatus for electrical submersible pump assembly with pump discharge head having an integrally formed discharge pressure port |
| 08/06/2009 | CA2750337A1 Hydraulic oil well pumping apparatus |
| 08/06/2009 | CA2712820A1 Oil filter for downhole motor |
| 08/05/2009 | EP2085572A2 Plunger lift system for well |
| 07/30/2009 | WO2009092189A1 External valve type hydraulic self-sealing piston oil well pump |
| 07/30/2009 | US20090188306 Reid vapor pressure analyzer with an air saturator |
| 07/29/2009 | CN100520063C Interanimation reversing piston oil production machine set |
| 07/25/2009 | CA2746626A1 Plunger lift system for well |
| 07/22/2009 | CN201277165Y Down-hole linear motor oil pump |
| 07/22/2009 | CN201277164Y Oil-draining lubricator type oil pump |
| 07/22/2009 | CN100516519C General beam type secondary regulation hydraulic energy saving system of oil pump |
| 07/15/2009 | CN201273264Y Rotational flow pipe type oil pump |
| 07/15/2009 | CN201273263Y Hollow screw pump for implementing fluid blending below pump |
| 07/15/2009 | CN101482107A Oil pump of flushing well |
| 07/14/2009 | CA2586303C Power variation control system for cyclic loads |
| 07/14/2009 | CA2527012C Gas-pressurized lubricator |
| 07/08/2009 | EP2076654A1 Method and apparatus for removing liquid from a gas well |
| 07/08/2009 | CN201269183Y Combination type pump head |
| 07/08/2009 | CN101476557A Brine pump for well and method for fast eliminating internal crystallization of brine pump |
| 07/08/2009 | CN100510401C Lifting device of electric submersible piston pump in horizontal wells |
| 07/07/2009 | US7558699 Control system for centrifugal pumps |
| 07/07/2009 | CA2491298C Pneumatic reciprocating motor |
| 07/07/2009 | CA2268690C Automatic restart control for a submersible pump |
| 07/01/2009 | CN201265514Y Double-plunger anti-sand imbedding and anti-sand stuck pump of horizontal well |
| 07/01/2009 | CN201265513Y Sand-pumping double-tube pump |
| 07/01/2009 | CN201265512Y Steam-filling sand-proof multifunctional oil pump |
| 07/01/2009 | CN201265511Y Sand-scraping sand-rotating oil pump |
| 07/01/2009 | CN201265510Y Non-piston oil pump |
| 07/01/2009 | CN101469693A Centring type rotary plunger oil-well pump |
| 07/01/2009 | CN100507272C Sand stop for electric submersible pump |
| 06/30/2009 | CA2317291C Method of manufacturing a continuous sucker rod on site |
| 06/24/2009 | CN201262146Y Oil extraction apparatus of full-metal single screw pump |
| 06/24/2009 | CN100504068C Pulley type flexible driving pumping unit |
| 06/17/2009 | CN201258846Y Hydraulic transmission vehicle drive device |
| 06/17/2009 | CN201258845Y Support for screw pump |
| 06/17/2009 | CN201258844Y Ground driving gear of VED screw pump |
| 06/17/2009 | CN201258843Y Pumping unblocking pump |
| 06/17/2009 | CN100501162C Chemical composite driving antiscaling soft plunger oil pump |
| 06/11/2009 | WO2009070876A1 Mud pump |
| 06/11/2009 | WO2009070853A1 A pumping apparatus |
| 06/10/2009 | CN201255098Y Sand prevention ferromagnetic block-resistant wax-scraping strengthening oil drainage multi-function oil well pump |
| 06/10/2009 | CN201255097Y Electric submersible screw pump oil production installation |
| 06/04/2009 | DE102007058068A1 Liquid i.e. thermal water, conveying device for use in geothermal plant, has feed pump connected with drive unit that comprises engine, where engine cooperates with hydromechanical drive that is coupled with feed pump |
| 06/03/2009 | CN201250771Y Oil extraction device of split-typed double-acting submersible oil pump driven by linear motor |
| 06/03/2009 | CN201250770Y Screw pump ground driving device |
| 06/03/2009 | CN101446281A Drainage device for coal bed gas well electric submersible centrifugal pump |
| 06/02/2009 | CA2435417C Adjustable valve rod and pull tube guide for downhole pumps |
| 05/30/2009 | CA2645631A1 Bottom hole hollow core electric submersible pumping system |
| 05/27/2009 | EP2063123A2 Method and apparatus for transporting fluid in a conduit |
| 05/27/2009 | CN201246381Y Oil pumping machine horse head pin with adjusting sleeve |
| 05/27/2009 | CN201246299Y Ultra-deep low leakage loss full barrel oil well pump |
| 05/27/2009 | CN201246298Y Anti-scaling oil well pump |
| 05/27/2009 | CN201246297Y Hydraulic reverse turning-proof screw pump drive device |
| 05/27/2009 | CN201246296Y Sliding valve type two-layer partial pressure composite extraction oil well pump |
| 05/27/2009 | CN101440798A Movable barrel type rotary plunger oil well pump |
| 05/27/2009 | CN101440797A Multi-joint centering self-rotating oil well pump |
| 05/22/2009 | WO2009064310A1 Back pressured hydraulic pump for sucker rod |
| 05/21/2009 | US20090127956 Motor built-in magnetic bearing device |
| 05/20/2009 | CN201241819Y 抽油泵柱塞 Pump plunger |
| 05/20/2009 | CN201241818Y Pressure bar oil well pump |
| 05/20/2009 | CN201241817Y Double-channel fixing valve of tubular oil well pump |
| 05/20/2009 | CN101435319A Novel oil pumping machine of oil field |
| 05/20/2009 | CN100489309C Numerically controlled reciprocating submersible pump apparatus |
| 05/20/2009 | CN100489308C Cable-free oil submersible electric pump |
| 05/20/2009 | CN100489264C Eccentric wear prevention oil-well pump |
| 05/19/2009 | US7534098 Suction distribution and disconnection system for a submersible pump |
| 05/13/2009 | CN201236785Y Inverse L-shaped fluid end for high-pressure reciprocating pump |