| 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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| 05/13/2009 | CN101429936A Down-hole double-screw type oil gas multi-phase mixed pump |
| 05/13/2009 | CN101429862A Positive and reverse circulation integrated hydraulic jet oil production method and apparatus |
| 05/13/2009 | CN100487243C Standing valve cover and magnetic oil-drainage type oil well pump equipped therewith |
| 05/12/2009 | US7530800 Rotary drivehead for downhole apparatus |
| 05/12/2009 | CA2441660C Downhole pumping system |
| 05/06/2009 | CN201232625Y Sidestream unloading deep-pumping pump |
| 05/06/2009 | CN201232624Y Step type deep-extraction oil pump |
| 05/06/2009 | CN201232623Y Double-acting electromagnetical oil immersed pump |
| 05/06/2009 | CN201232622Y Electromagnetical oil immersed pump |
| 05/05/2009 | US7527482 Method and apparatus for compressing a gas to a high pressure |
| 05/05/2009 | CA2474410C Hydraulic multiphase pump |
| 04/29/2009 | EP2053245A1 A surface motor direct-drive sucker-rod screw pump device |
| 04/29/2009 | CN201228628Y Anti-blocking low friction resistance seal pumping effect booster |
| 04/29/2009 | CN201228624Y Hydraulic screw pump |
| 04/29/2009 | CN201228538Y Non-rod pumping unit |
| 04/29/2009 | CN201228524Y Integral downhole process pipe column for separate layer testing and water shut off for pumping well |
| 04/23/2009 | WO2009052175A1 Cranked rod pump apparatus and method |
| 04/23/2009 | WO2009049420A1 Production tubing member with auxiliary conduit |
| 04/23/2009 | CA2703053A1 Cranked rod pump apparatus and method |
| 04/23/2009 | CA2701954A1 Production tubing member with auxiliary conduit |
| 04/22/2009 | CN201225263Y Water-based non-rod oil pumping device |
| 04/22/2009 | CN201225262Y Hydraulic power oil well pump |
| 04/22/2009 | CN201225261Y Oil pump for increasing oil by deeply pumping |
| 04/21/2009 | CA2455720C Above the motor bellows expansion member for a submersible pump |
| 04/15/2009 | CN201221462Y High temperature resistant screw pump oil extraction apparatus |
| 04/15/2009 | CN201221461Y Double-plunger self-rotating oil well pump |
| 04/15/2009 | CN101408167A Method for moving belt oil pumping machine |
| 04/14/2009 | CA2478953C Method and pump apparatus for removing liquids from wells |
| 04/09/2009 | WO2009046108A2 Oil well pump apparatus |
| 04/09/2009 | WO2009024769A3 Integrated 'one pump' control of pumping equipment |
| 04/09/2009 | CA2687317A1 Oil well pump apparatus |
| 04/08/2009 | CN201218195Y Anti-slag standing valve for oil pump |
| 04/08/2009 | CN201218187Y Long-plunger short-pump barrel anti-scaling pump with dirty-discharging function |
| 04/08/2009 | CN201218183Y Sand-proof oil pump with poly-driving large-flow passage cascading short pump barrel |
| 04/08/2009 | CN101403378A Linear magnetic force activation double-piston intelligent oil extraction pump |
| 04/08/2009 | CN100476668C Efficiency estimating method of ground equipment of oil pumping system with lever |
| 04/08/2009 | CN100476217C Normal and reverse circulating jet pump with hydraulically-driven multiple switching sliding sleeve |
| 04/07/2009 | US7513752 Beam pump dynamic load monitoring and methods |
| 04/05/2009 | CA2640465A1 Hydraulic actuated pump system |
| 04/02/2009 | WO2009039602A1 Artificial lift mechanisms |
| 04/02/2009 | CA2697984A1 Artificial lift mechanisms |
| 04/01/2009 | CN201215079Y Antiscaling precipitation sphere protector for pumping well tubular pump |
| 04/01/2009 | CN201215004Y Novel gas-tight sand prevention pumping unit |
| 04/01/2009 | CN201214988Y Torsion pumping polished rod |
| 04/01/2009 | CN101397672A Sacrificial anode and protective cathode-oil-well pump anti-corrosive apparatus |
| 03/26/2009 | US20090081051 Monitoring System |
| 03/25/2009 | CN201212467Y Remote numerical control oil production machine |
| 03/25/2009 | CN201212466Y Oil-submersible and oil production pump driven by DC step permanent magnet linear electric motor |
| 03/19/2009 | US20090074591 High pressure radial pump |
| 03/18/2009 | CN201209431Y Oil well big-diameter hydraulic unloading deep pumping device |
| 03/18/2009 | CN101387290A Oiling valve for oil-well pump |
| 03/18/2009 | CN101387288A High energy-conserving and low energy consumption hydraulic pumping unit |
| 03/18/2009 | CN101387194A Anchoring string for oil production string of hydraulic screw pump |
| 03/18/2009 | CN101387128A Rainwater drain support system and method |
| 03/18/2009 | CN101387127A Rainwater drain control system and method |
| 03/12/2009 | US20090068026 Downhole Pump |
| 03/11/2009 | CN101382131A Pressure testing downhole oil production screw pump |
| 03/04/2009 | CN201202620Y Bridge type oil inlet plunger oil well pump |
| 03/04/2009 | CN101377195A DC stepping permanent magnetism straight line motor drive type oil-submersible extracting pump |
| 03/04/2009 | CN100465443C A deep well irrigation pump |
| 03/04/2009 | CN100465441C An elastic-sealing-valve oil pump |
| 02/28/2009 | CA2599630A1 Stinger for shrouded submersible pump |
| 02/26/2009 | WO2009024769A2 Integrated 'one pump' control of pumping equipment |
| 02/25/2009 | CN201198825Y Sand deposing-proof clamp pump device |
| 02/21/2009 | CA2618434A1 Improved plunger for a sucker rod pump |
| 02/18/2009 | CN101368560A Sucker-rod rotary ram pump oil pumping apparatus |
| 02/18/2009 | CN101368559A Pumping system and pumping method |
| 02/18/2009 | CN100462563C Pump and galvanic cell corrosion protection apparatus for the pump |
| 02/12/2009 | US20090041596 Downhole Electric Driven Pump Unit |
| 02/11/2009 | CN201193608Y Screw pump for deviated and horizontal wells |
| 02/11/2009 | CN201193605Y Sealing / unsealing anti-corrosive wear resistant rod type oil well pump, |
| 02/11/2009 | CN201193602Y Composite selective mining pump with rod pump and electric submersible pump |
| 02/11/2009 | CN101363437A Downhole linear electric motor oil-well pump |
| 02/11/2009 | CN101363436A Novel energy-conserving hydraulic pumping unit |
| 02/11/2009 | CN100460709C Speed reducer of submersible pump with centripetal axis |
| 02/11/2009 | CN100460678C Antiscaling alloy oil sucking pump |
| 02/10/2009 | CA2508053C Internal shock absorber bypass plunger |
| 02/05/2009 | WO2009017021A1 Deep sea water lift-up device |
| 02/04/2009 | CN201190657Y Straight-driven ground apparatus for rare-earth permanent magnet motor of screw pump |
| 02/04/2009 | CN201190642Y Pressure reaction type auto reciprocating fluid pump |
| 02/04/2009 | CN101358600A Ultra-large displacement screw oil well pump system |
| 02/04/2009 | CN100458158C Driver for steel cable lifting band of pumping unit |
| 01/28/2009 | CN201187444Y Connector of oil well pump |
| 01/28/2009 | CN201187442Y External channel plunger oil well pump |
| 01/28/2009 | CN201187437Y Single tube hydraulic oil well pump for resetting yield fluid pillar gravity |
| 01/28/2009 | CN201187436Y Straight-line reciprocating energy-saving oil pumping machine |
| 01/28/2009 | CN201187435Y Multifunctional sand deposition type oil well pump |
| 01/27/2009 | CA2442973C Control system for centrifugal pumps |
| 01/21/2009 | CN201184171Y Bias-wearing-proof pumping unit |
| 01/21/2009 | CN101349325A Overlapped parallel type involute oil-submersible screw pump planetary reducer |
| 01/20/2009 | CA2396548C Immersible motor system |
| 01/14/2009 | CN201180639Y Sealing device of split type oil pumping machine |
| 01/14/2009 | CN201180636Y Numerical control reciprocating type oil-submersible motor driven oil pump |
| 01/14/2009 | CN201180635Y Hydraulic double-acting rodless pump |
| 01/13/2009 | US7475731 Sand plunger |
| 01/07/2009 | CN201176922Y Bridge type separated oil production pump |
| 01/07/2009 | CN201176921Y Hanging pendulum type dynamic balancing synergistic energy-saving oil pumping machine |
| 01/07/2009 | CN201176867Y Intelligentized novel yield-increasing gas lift device |
| 01/03/2009 | CA2636526A1 Stress and torque reducing tool |
| 12/31/2008 | CN201173194Y Multiple tandem double-screw pump |