| 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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| 05/28/2008 | CN101187293A Eccentric wear prevention pumping pipe string |
| 05/27/2008 | US7377312 Oil well pump apparatus |
| 05/22/2008 | WO2008058463A1 An annular gear rack pumping unit |
| 05/21/2008 | CN201062577Y Dirty-scraping oil pump |
| 05/21/2008 | CN201062576Y Plunger pump |
| 05/21/2008 | CN101182840A Filling-in bits mule head pin |
| 05/15/2008 | US20080112826 Top plunger adapter |
| 05/15/2008 | US20080110617 Method and Apparatus for Logging Downhole Data |
| 05/14/2008 | CN201059263Y Two-path highly effective liquid drawing pump |
| 05/14/2008 | CN201059262Y Exhausting synergy injection-production oil-well pump |
| 05/14/2008 | CN201059260Y Oil-well pump |
| 05/14/2008 | CN201059259Y Production well abrasion-resistant sticking-proof cylinder-free oil-well pump |
| 05/14/2008 | CN201059258Y Tubing pump |
| 05/14/2008 | CN201059257Y Stroke increasing energy saving type compound balance beam pumping unit |
| 05/14/2008 | CN201059256Y Long plunger type sand-proof oil-well pump |
| 05/14/2008 | CN201059255Y Long plunger type viscous crude oil pump |
| 05/14/2008 | CN201059254Y Disconnecting-proof crank-pin |
| 05/14/2008 | CN201059170Y Screw pump sucker rod metal centralizer |
| 05/08/2008 | WO2008052381A1 A wheel type pumping unit |
| 05/07/2008 | CN201057352Y Balance beam type oil pumping machine crank protection fence |
| 05/07/2008 | CN201057147Y Pumping rod guide apparatus of screw pump |
| 05/07/2008 | CN201057141Y Double-valve oil pump |
| 05/07/2008 | CN201057138Y Special oil pump of linear electric motor |
| 05/07/2008 | CN201056996Y Sleeve type helical centralizer for special lever of screw pump well |
| 05/02/2008 | WO2008050095A1 Method and apparatus for removing liquid from a gas well |
| 04/30/2008 | EP1916380A1 Method and apparatus for removing liquid from a gas well |
| 04/30/2008 | CN201053391Y Automatic belt tension device for oil pumping machine |
| 04/30/2008 | CN201053388Y Pneumatic hydraulic oil pumping unit |
| 04/30/2008 | CN201053387Y Oil pump synergistic device |
| 04/30/2008 | CN101169113A Tube type gas-tight oil-well pump with salvaging standing valve |
| 04/30/2008 | CN101169033A Oil extracting system and oil extraction monitoring system |
| 04/30/2008 | CN100385120C Hydraulic self-sealed plunger oil-well pump |
| 04/29/2008 | CA2428618C Plunger for gas wells |
| 04/24/2008 | WO2008005088A3 Dual cylinder lift pump system and method |
| 04/24/2008 | US20080093361 Valve Cap |
| 04/23/2008 | CN201050473Y Pumping unit anti-slip vehicle lock |
| 04/23/2008 | CN201050471Y Oil extractor |
| 04/23/2008 | CN201050470Y Gearless transmission oil pumping unit |
| 04/23/2008 | CN201050469Y Double-ring type load relief oil-well pump |
| 04/23/2008 | CN100383363C Direct ground driving gear of screw pump |
| 04/19/2008 | CA2606619A1 Gas handling in a well environment |
| 04/16/2008 | CN201047344Y Straight-line balance type long stroke energy-saving oil pumping machine |
| 04/16/2008 | CN201047271Y Oil pumping motor-pumped well de-loading machine |
| 04/16/2008 | CN101162018A Decelerator-free oil-submersible screw pump |
| 04/16/2008 | CN101162017A Oil-submersible electromagnetic oil extraction pump |
| 04/16/2008 | CN101162016A Yield highly effective oil-well pump for mechanical oil production |
| 04/11/2008 | CA2606124A1 Submersible direct-current electric motor |
| 04/09/2008 | EP1907767A2 Solar pump systems and related methods |
| 04/09/2008 | CN201045358Y Hydraulic jet pump |
| 04/09/2008 | CN201045341Y Workover treatment self-help liquor drainage pump |
| 04/09/2008 | CN201045290Y Large hollow stem oil pumping system |
| 04/09/2008 | CN101158344A Oil-well pumping communicate separator |
| 04/02/2008 | CN201043587Y Connecting structure for steel wire rope and wiring sleeve of oil pumping machine polished rod eye |
| 04/02/2008 | CN201043562Y Brake device of oil pumping machine |
| 04/02/2008 | CN201043518Y Connecting structure for mule head and balance beam of oil pumping machine |
| 03/28/2008 | CA2604508A1 Electrical submersible pump |
| 03/26/2008 | CN201041217Y Combined speed reducer dedicated for oil pump |
| 03/26/2008 | CN201041149Y Balance beam pumping unit locking pin device |
| 03/26/2008 | CN201041148Y Oil pump coupling-uncoupling device |
| 03/26/2008 | CN201041146Y Oil-well pump synergy device |
| 03/26/2008 | CN201041145Y Sliding pumping unit moving device |
| 03/26/2008 | CN201041144Y Cylindrical pumping unit |
| 03/26/2008 | CN201041143Y Different diameter double cylinder soft plunger fluid-discharging pump |
| 03/26/2008 | CN201041141Y Electric submersible bi-directional oil-pumping anti-sand pump |
| 03/26/2008 | CN100376794C Strong anti-thickening anti-sand hydraulic feedback oil pump with long plug ring seal and oil inlet sand deposition path |
| 03/25/2008 | US7347255 Device for detecting water in product-only pump flow stream |
| 03/19/2008 | CN201037457Y Highly effective linear motor oil extraction pump |
| 03/19/2008 | CN101144471A Highly effective bionic surface sealing valve oil-well pump |
| 03/19/2008 | CN101144377A Oil well sucker rod pump oil pumping completion tubular pile plugging device with pressure |
| 03/15/2008 | CA2601297A1 Submergible motor protector bag |
| 03/12/2008 | CN201034073Y Sand-proof self-cleaner for submersible electric pump |
| 03/12/2008 | CN201034072Y Packing cascade thick-oil pump |
| 03/12/2008 | CN101139985A Wheeled oil pumping machine |
| 03/11/2008 | CA2600740A1 Discharge pressure actuated pump |
| 03/11/2008 | CA2559502A1 Discharge pressure actuated pump |
| 03/05/2008 | CN201031793Y Low type completely balancing long stroke beam-pumping unit |
| 03/05/2008 | CN201031792Y Improved down-hole screw pump ground driving head |
| 03/05/2008 | CN201031791Y Equal-diameter strong start and stop oil-well pump |
| 03/05/2008 | CN201031666Y Synergistic pumping unit |
| 03/05/2008 | CN201031646Y Improved oil production screw pump blowout preventer high voltage isolation device |
| 03/05/2008 | CN101135910A oil pumping with lever system ground facilities efficiency evaluate method |
| 03/05/2008 | CN100373051C Wind and electricity hybrid driving method and apparatus for sucker rod pump |
| 03/04/2008 | US7337854 Gas-pressurized lubricator and method |
| 02/27/2008 | CN201027934Y Belt tension device of oil pumping machine |
| 02/27/2008 | CN201027865Y Electromagnetic pulse anti-theft brake |
| 02/27/2008 | CN201027649Y Separate-layer oil extraction screw pump |
| 02/27/2008 | CN201027648Y Straight-rotary screw pump |
| 02/27/2008 | CN201027643Y Sand setting type oil well pump barrel assembly |
| 02/27/2008 | CN201027642Y Rod type underbalance oil well pump |
| 02/27/2008 | CN201027641Y Novel combined vertical solid-liquid hydroclone |
| 02/27/2008 | CN201027636Y Adjusting device for balance weight of oil pumping machine |
| 02/27/2008 | CN201027635Y Reversing arrangement for rocker arm type oil pumping machine |
| 02/27/2008 | CN201027634Y Electric pump well guard |
| 02/27/2008 | CN201027633Y Lever-type oil rig |
| 02/27/2008 | CN201027632Y Upper catcher for oil pump |
| 02/27/2008 | CN201027631Y Helical check valve |
| 02/27/2008 | CN201027516Y Screw pump wellhead device |
| 02/26/2008 | CA2443010C Rod pump control system including parameter estimator |
| 02/26/2008 | CA2389419C Protector for electrical submersible pumps |
| 02/20/2008 | CN201025260Y Deviated friction prevention and heavy oil sucker rod |