| 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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| 08/17/2011 | CN102155392A Injection-extraction integrated sand prevention oil-well pump |
| 08/17/2011 | CN102155391A Valve type deep well axial plunger pump |
| 08/17/2011 | CN102155390A Flexible transmission mechanism for deep well screw pump |
| 08/17/2011 | CN102155190A Pulley stroke-lengthening beam pumping unit |
| 08/17/2011 | CN102155189A Balancing torque converting device for beam-pumping unit |
| 08/17/2011 | CN102155188A Unbalanced type hydraulic oil pumping machine |
| 08/17/2011 | CN102155186A Lever system for pumping unit |
| 08/16/2011 | CA2566010C Reciprocating pump drive apparatus |
| 08/11/2011 | US20110194949 Compensating Mechanical Seal For Use With A Downhole Electrical Submersible Pump |
| 08/10/2011 | CN201925137U 一种用于偏心井上的螺杆泵直接驱动装置 Inoue eccentric screw pump for direct drive |
| 08/10/2011 | CN201925136U 油田管式抽油泵 Oilfield tubular pump |
| 08/10/2011 | CN201924898U 自适应双曲柄柔性传动抽油机 Adaptive double crank flexible drive pumping |
| 08/10/2011 | CN201924891U Oil pumping unit integrating multiple wells into one machine |
| 08/10/2011 | CN1776196B Method and system for accessing subterranean deposits from the surface |
| 08/10/2011 | CN102146912A High-strength large-pump tripping device |
| 08/10/2011 | CN102146911A Sand-prevention oil-well pump with long plunger |
| 08/10/2011 | CN102146910A Pump rod type defueling pump |
| 08/10/2011 | CN101776065B High-pressure sealing driver of oil-extracting screw pump |
| 08/09/2011 | CA2550066C Improved wellhead drive braking mechanism |
| 08/09/2011 | CA2483058C Flying valve and well production method |
| 08/09/2011 | CA2480228C Gas operated automatic, liquid pumping system for wells |
| 08/05/2011 | CA2729378A1 Compensating mechanical seal for use with a downhole electrical submersible pump |
| 08/04/2011 | US20110189030 Fluid pump |
| 08/04/2011 | US20110187123 Portable integrated power supply and hvac unit |
| 08/03/2011 | CN201916171U 防砂防垢长柱塞抽油泵 Sand scale length of the plunger pump |
| 08/03/2011 | CN201916170U 抽油泵 Pump |
| 08/03/2011 | CN201915910U 抽油机自动平衡装置 Pumping automatic balancing device |
| 07/27/2011 | CN201908815U Two-way plunger hydraulic oil well pump |
| 07/27/2011 | CN201908814U Two-stage pump cylinder and two-stage plunger piston combined pump cylinder pipe type pump |
| 07/21/2011 | WO2011087838A1 Disposable pumping system and coupler |
| 07/21/2011 | WO2011085753A1 Deep-well pump system |
| 07/21/2011 | CA2785331A1 Disposable pumping system and coupler |
| 07/20/2011 | CN201902201U Movable roller balancing oil pumping unit with continuous oil pumping rod |
| 07/19/2011 | CA2522972C Downhole pump |
| 07/13/2011 | EP2343416A1 Borehole pump system |
| 07/13/2011 | CN201896730U Novel hydraulic screw pump |
| 07/13/2011 | CN201896729U Gas-proof load-reducing deep well defueling pump |
| 07/13/2011 | CN201896606U Highly efficient energy-saving device of beam pumper |
| 07/12/2011 | CA2451918C Pumping assembly |
| 07/11/2011 | CA2724058A1 Steam driven pump for sagd system |
| 07/06/2011 | CN201893678U Cylindrical linear motor for oil-well pump |
| 06/30/2011 | US20110158824 Subsea technique for promoting fluid flow |
| 06/29/2011 | CN201884254U Low submergence depth tubing pump dedicated to coal bed gas extraction |
| 06/29/2011 | CN201884253U Durable drill pump |
| 06/29/2011 | CN102108847A Dual well balance type hydraulic pumping unit and working method thereof |
| 06/29/2011 | CN101725514B Hydraulic reciprocating type oil well pump |
| 06/28/2011 | US7967578 Hydraulic gravity ram pump |
| 06/22/2011 | CN201874788U Direct driving device of screw pump |
| 06/22/2011 | CN201874787U Sand-prevention oil well pump without standing valve |
| 06/22/2011 | CN201874536U Swing type double-well pumping unit |
| 06/22/2011 | CN102102658A High-temperature ceramic pump |
| 06/22/2011 | CN102102657A Locking device of rod type oil well pump |
| 06/22/2011 | CN102102501A Method for solving problem of incapable long-term balance of current of beam-pumping unit in running process |
| 06/22/2011 | CN101672274B Easily-installed adjustable type underground double-screw gas-liquid mixed pumping pump |
| 06/16/2011 | WO2011069517A1 Pump system |
| 06/15/2011 | CN201865894U Double-high hydraulic submerged fluid pump |
| 06/15/2011 | CN201865893U Injection and extraction integral oil suction pump |
| 06/15/2011 | CN201865646U Linear motor driving belt type pumping unit |
| 06/15/2011 | CN201865635U Counterweight box of vertical oil pumping unit |
| 06/15/2011 | CN1926333B Hydraulic motor arrangement and method of operating a hydraulic motor |
| 06/15/2011 | CN102094797A Rodless electric submersible hydraulic propulsion plunger type deep-well defueling pump |
| 06/15/2011 | CN102094597A Automatic balance adjustment device for pumping unit by utilizing liquid counterweight rider |
| 06/09/2011 | WO2010141405A4 Hydraulic oilfield lift pump |
| 06/08/2011 | CN201858128U Oil well pump of horizontal heavy oil well |
| 06/08/2011 | CN201858127U Integral cylinder plunger pump |
| 06/07/2011 | CA2551257C Method for estimating pump efficiency |
| 06/01/2011 | CN201851321U Electric submersible bidirectional tubular oil-well pump |
| 06/01/2011 | CN201851320U Offset fixed valve type separate-producing pump for multilayer exploitation |
| 06/01/2011 | CN201851319U Sand control oil-well pump |
| 06/01/2011 | CN201851318U Ring plug defueling pump |
| 06/01/2011 | CN102080646A Layer mining anti-gas pump for pumping well |
| 06/01/2011 | CN102080517A One machine multi-well pumping unit |
| 05/26/2011 | US20110123374 Compensator assembly for submersible pump system |
| 05/26/2011 | US20110123369 Displacement transducer |
| 05/25/2011 | CN201843773U Pump cylinder assembly for oil well pump |
| 05/25/2011 | CN201843763U Single-screw oil-well pump ground direct-driving device |
| 05/25/2011 | CN201843762U Extrusion type piston pump |
| 05/25/2011 | CN201843761U Whole barrel oil well pump with reinforcing pump barrel |
| 05/25/2011 | CN201843760U Novel anti-breaking synergia oil well pump |
| 05/19/2011 | WO2011057579A1 Pumping unit drawn directly by external-rotor motor |
| 05/18/2011 | CN201836027U Horizontal well inclined shaft section lift oil well pump |
| 05/18/2011 | CN201835794U Drainage and gas production simulation experiment device |
| 05/12/2011 | WO2011054085A1 High efficiency fluid pumping apparatus and method |
| 05/12/2011 | CA2788984A1 High efficiency fluid pumping apparatus and method |
| 05/12/2011 | CA2777869A1 Control device, oil well with device and method |
| 05/11/2011 | CN102052062A Energy-saving tower-type oil pumping device |
| 05/11/2011 | CN101624981B Double-inlet and single-outlet submersible screw pump oil extraction device |
| 05/10/2011 | US7938631 Pump rotation adapter (360 degrees rotation) |
| 05/10/2011 | CA2450707C Double-acting reciprocating downhole pump |
| 05/05/2011 | WO2011008391A3 Lift wash-through facility |
| 05/05/2011 | US20110100641 Downhole piston pump and method of operation |
| 05/04/2011 | CN201818490U Plunger assembly of oil well pump |
| 05/04/2011 | CN201818488U Standing valve for oil-well pump |
| 05/04/2011 | CN201818478U Vibration damping and righting device of single screw oil submerged pump |
| 05/04/2011 | CN201818477U Novel oil-well pump capable of being inspected without lifting pipe string |
| 05/04/2011 | CN102042199A Sand-stick-proof sanding oil-well pump |
| 05/04/2011 | CN102041979A Torque-balance beam pumping unit |
| 05/04/2011 | CN102041978A Rod hiding type oil pumping unit |
| 05/04/2011 | CN102041977A Torque filtering device of pumping unit |
| 05/03/2011 | CA2644149C Control system for centrifugal pumps |