| 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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| 10/27/2010 | CN201615051U 防喷管式抽油泵 BOP tube pump |
| 10/27/2010 | CN201615050U 一种高效抽油泵 An efficient pump |
| 10/27/2010 | CN101871336A Hydraulic reciprocating piston two-way oil production machine |
| 10/22/2010 | CA2665362A1 Valve cage for a pump |
| 10/22/2010 | CA2663725A1 Downhole flow reversal apparatus |
| 10/21/2010 | WO2010118535A1 Artificial lift and transfer pump |
| 10/20/2010 | CN201610745U 游梁式抽油机铁削合成配重块 Beam pumping iron cut synthetic counterweight |
| 10/20/2010 | CN201610744U 简式曳引抽油机 Simple traction pumping |
| 10/19/2010 | CA2350047C Pump drive head with stuffing box |
| 10/13/2010 | CN201606229U 一种风电互补液压式抽油装置 A wind power complementary hydraulic oil rig |
| 10/13/2010 | CN201606043U 游梁抽油机下偏配重装置 Under partial counterweight beam pumping unit |
| 10/13/2010 | CN101858335A Self-cleaning sand setting collector |
| 10/13/2010 | CN101858334A Drilling pump |
| 10/13/2010 | CN101858333A Dual-working barrel oil-well pump capable of swabbing consecutively |
| 10/13/2010 | CN101858332A Multi-section centering self-rotating reducer oil pipe pump |
| 10/07/2010 | WO2010114916A1 Wireless monitoring of pump jack sucker rod loading and position |
| 10/07/2010 | WO2010111911A1 Wheel pumping unit |
| 10/07/2010 | US20100254839 Top seal assembly |
| 10/07/2010 | US20100254832 Liquid supply drive mechanism using osmotic pump and microchip having the liquid supply drive mechanism |
| 10/06/2010 | CN201599175U 多级自动补偿杆式抽油泵 Multi-stage automatic compensation rod pump |
| 10/06/2010 | CN201599010U 抽油机配重块安全防护罩 Pumping weights safety shield |
| 10/06/2010 | CN101216028B Hydraulic power oil pump |
| 09/29/2010 | CN101846062A Displacement variable oil-well pump |
| 09/29/2010 | CN101846061A Rodless hydraulic deep-well oil pump |
| 09/29/2010 | CN101846060A Reciprocating defueling pump with rotating oil pipe |
| 09/22/2010 | CN201588776U Hydraulic bore double-screw rod pump |
| 09/22/2010 | CN101842547A Oil well pump apparatus |
| 09/21/2010 | CA2568230C Submersible pump |
| 09/21/2010 | CA2504302C Sand plunger |
| 09/16/2010 | WO2010104412A1 Oil well plunger pumping |
| 09/16/2010 | US20100230091 Hydraulically Actuated Downhole Pump with Gas Lock Prevention |
| 09/15/2010 | CN201582086U Large-depth difference split respective-pumping combined pump |
| 09/15/2010 | CN201582085U Spiral lifting oil pump |
| 09/15/2010 | CN201582084U High temperature-resistant, high pressure-resistant screw pump |
| 09/15/2010 | CN201582083U Locking device for rod-type oil-well pump |
| 09/15/2010 | CN101832257A Reciprocating oil-well pump plunger sealing device |
| 09/15/2010 | CN101832254A Deep-pumping matched process technology of oil well |
| 09/11/2010 | CA2696600A1 Hydraulically actuated downhole pump with gas lock prevention |
| 09/08/2010 | CN201574746U Layered testing pump for oilfield producing well |
| 09/08/2010 | CN201574737U Split-type subdivision oil extraction device |
| 09/08/2010 | CN101581293B Self-lubricating string for rod and tubing wear prevention and sucker rod pumping of inclined wells |
| 09/02/2010 | WO2010098690A1 Oil-well screw pump driven from the wellhead |
| 09/01/2010 | CN201568533U Pumping unit speed reducer with high transmission ratio |
| 09/01/2010 | CN201568271U Efficient low-leakage across bridge pump |
| 08/31/2010 | US7785080 Downhole ram pump |
| 08/26/2010 | US20100215528 Double standing valve sucker rod pump |
| 08/25/2010 | CN201560748U Asymmetric combined circulation balanced pumping unit |
| 08/25/2010 | CN101815871A Artificial lift mechanisms |
| 08/19/2010 | US20100209265 Gas Well Dewatering System |
| 08/18/2010 | CN201554861U Elastic sealing plunger and low-leakage oil-well pump |
| 08/18/2010 | CN201554633U Falling object protective oil pump capable of performing annulus logging |
| 08/18/2010 | CN201554632U Eccentric gap bridge separate-pumping mixed-recovery oil well pump |
| 08/18/2010 | CN201554631U Combined plunger anti-seize oil well pump |
| 08/18/2010 | CN201554630U Magnetic suspension pump |
| 08/18/2010 | CN101806201A Self balance energy storage oil extractor |
| 08/18/2010 | CN101162016B Yield highly effective oil-well pump for mechanical oil production |
| 08/11/2010 | CN201546954U Surface driving oil-submersible single-screw pump set |
| 08/11/2010 | CN201546686U Friction-type linear oil-pumping unit with multiple ropes |
| 08/10/2010 | US7770509 Valve cap |
| 08/04/2010 | EP2212511A1 Production tubing member with auxiliary conduit |
| 08/04/2010 | CN201539399U Piston settlement combined protector |
| 08/04/2010 | CN201539393U Plunger pump with rod for expanding anti-clamping moving valve cover |
| 08/04/2010 | CN201539237U Indirect pulling type double-ended wire-cable type oil pumping machine that can be operated independently |
| 08/04/2010 | CN101539133B Feedback type oil-well pump |
| 08/03/2010 | CA2572369C Downhole pumps with sand snare |
| 07/28/2010 | EP2209994A1 Cranked rod pump apparatus and method |
| 07/28/2010 | CN201535156U 抽油机配重防坠落装置 Pumping with heavy anti-fall device |
| 07/28/2010 | CN201535146U 直驱螺杆泵井口密封装置 Direct drive screw wellhead seal |
| 07/28/2010 | CN101787871A Vertical push-up and pull-down hydraulic pumping unit |
| 07/28/2010 | CN101787870A Multi-cylinder combined type full-balanced hydraulic oil pumping unit |
| 07/28/2010 | CN101787869A Double-cylinder symmetrical type fully balanced hydraulic oil pumping unit |
| 07/28/2010 | CN101787868A Single-cylinder bidirectional full-balanced hydraulic oil extractor |
| 07/27/2010 | US7762339 Apparatus and method for controlling the speed of a pump in a well |
| 07/22/2010 | WO2010021602A3 Pumping equipment |
| 07/21/2010 | CN201531412U Novel sand control device for oil-well pump in oilfield |
| 07/21/2010 | CN201531409U Dedicated ultra-high strength plug-in type pumping rod for screw pumps |
| 07/21/2010 | CN201531400U Intelligent drainage and production device for immersed pump in coal bed gas wells |
| 07/21/2010 | CN201531399U Hydraulic reciprocating oil-well defueling pump |
| 07/21/2010 | CN201531398U Anti-sway wear-pump oil pump |
| 07/21/2010 | CN201531397U Movable cylinder high-efficiency tubular oil pump |
| 07/21/2010 | CN101782060A Hydraulic oil pump |
| 07/21/2010 | CN101781980A Method for balancing reduction gearbox output shaft torque of ventilator and complete-cycle balancing device |
| 07/21/2010 | CN101781979A Hydraulic driving oil extraction equipment |
| 07/20/2010 | CA2504088C Motor cooler for submersible pump |
| 07/14/2010 | CN201526665U Oil discharge anti-theft impurity remover of oil extractor reduction gearbox |
| 07/14/2010 | CN201526443U Anti-scaling oil well pump |
| 07/14/2010 | CN201526442U Multifunctional combined protective oil-well pump |
| 07/14/2010 | CN101776066A Wind-electricity complementary hydraulic oil pumping device |
| 07/14/2010 | CN101776065A High-pressure sealing driver of oil-extracting screw pump |
| 07/08/2010 | US20100170671 Systems and methods for providing electrical transmission in downhole tools |
| 07/07/2010 | CN201521547U Anti-loosing crank pin device |
| 07/07/2010 | CN201521422U Long plunger sand control efficiency-increasing pump |
| 07/07/2010 | CN201521421U Screw pump accessory device |
| 07/07/2010 | CN201521420U Defueling pump |
| 07/06/2010 | CA2605893C Top plunger adapter |
| 07/01/2010 | WO2010025461A3 Systems and methods for driving a pump associated with a subterranean well |
| 06/30/2010 | CN201517492U Control device of bottom valve of sucker rod pump |
| 06/30/2010 | CN201517491U Fracturing and swabbing combined oil-well pump |
| 06/30/2010 | CN201517490U Protective device mounted below sucker rod pump |
| 06/30/2010 | CN201517407U Mobile ground oil-pumping device |