| 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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| 08/26/2008 | CA2490455C Reciprocating slickline pump |
| 08/21/2008 | US20080196902 Wireline or coiled tubing deployed electric submersible pump |
| 08/20/2008 | CN201103535Y Multi-stroke balance beam balancing oil-pumping machine |
| 08/20/2008 | CN201103534Y Exhausting and effect-reinforcing oil pump for injection and production |
| 08/20/2008 | CN201103533Y Oil-pumping device for flexible transmission machine |
| 08/20/2008 | CN201103384Y Plunger type oil pumping machine driven by oil-submersible motor |
| 08/20/2008 | CN201103372Y Sucker-rod pumping well completion tubular pile plugging device for oil well operation under pressure |
| 08/20/2008 | CN100412368C Efficient reversed beam-pumping unit |
| 08/13/2008 | CN201100228Y A novel measuring spraying linked oil pump |
| 08/13/2008 | CN201100121Y Pump suction holding and suction-assisted device |
| 08/13/2008 | CN101240792A High water-containing rod pumped well oiling type double-passage eccentric wear-proof process |
| 08/13/2008 | CN100410535C Fishable linear motor reciprocating pump |
| 08/12/2008 | US7410012 Hydraulic automatic boosting pump |
| 08/07/2008 | WO2008092266A1 Coaxial pumping apparatus with internal power fluid column |
| 08/07/2008 | CA2676847A1 Coaxial pumping apparatus with internal power fluid column |
| 08/06/2008 | CN201096085Y Oil pumping machine dedicated belt-tightening device |
| 08/06/2008 | CN201096081Y Sandproof descaling oil pump |
| 08/06/2008 | CN101238646A Method for transmitting data between a pump unit and a control device, and an appropriately designed pump system |
| 08/06/2008 | CN101235814A Horizontal trolley type oil pumping machine |
| 08/06/2008 | CA2619544A1 Plunger lift system |
| 08/06/2008 | CA2583041A1 Plunger lift system |
| 08/05/2008 | CA2276520C Right angle drive adaptor for use with a vertical drive head in an oil well progressing cavity pump drive |
| 07/30/2008 | CN201092953Y Double jet nozzles stirring type jet pump |
| 07/30/2008 | CN201092952Y Hydraulic brake type single screw oil well pump surface drive |
| 07/30/2008 | CN201092831Y Lifting screw pump anchoring device. |
| 07/29/2008 | US7406398 System and method for determining pump underperformance |
| 07/29/2008 | US7404702 Debris evacuation apparatus and method for an oil pump |
| 07/29/2008 | CA2576182A1 Fluid pump drive |
| 07/23/2008 | CN201090426Y Disjointing device for oil pump |
| 07/23/2008 | CN201090419Y Pumping unit balance weight moving equipment |
| 07/23/2008 | CN201090418Y Hydraulic pressure-driven gear oil well pump |
| 07/23/2008 | CN201090417Y Pump down vibration anti-block apparatus |
| 07/23/2008 | CN201090416Y Light load soft hoisting energy saving oil jack |
| 07/23/2008 | CN201090415Y Tubing pump with short pump barrel and long plunger capable of automatically draining oil |
| 07/23/2008 | CN201090414Y Oil inlet and sand deposit apparatus of oil-well pump with sands-proof check |
| 07/23/2008 | CN201090413Y Oil well pump connecting segregator |
| 07/23/2008 | CN201090412Y Oil well pump of thick oil and high pour-point oil for pouring vapor and extracting oil |
| 07/23/2008 | CN201090411Y Plunger type unpowered oil pumping device |
| 07/23/2008 | CN201090410Y Pumping unit energy saving power unit |
| 07/23/2008 | CN101225738A Oil field down-hole rotary type mechanical transmission means |
| 07/19/2008 | CA2618556A1 Electric submersible pump and motor assembly |
| 07/19/2008 | CA2618373A1 Wireline or coiled tubing deployed electric submersible pump |
| 07/17/2008 | WO2008085081A1 Well electric pumping unit |
| 07/17/2008 | WO2008083522A1 A rod pump used for eliminating eccentric rod wear and providing forward well-flushing |
| 07/16/2008 | CN201087744Y Activity plunger oil pump |
| 07/16/2008 | CN101220809A Sand-prevention and oil-draining type oil pump |
| 07/16/2008 | CN101220808A Reciprocating pump control system |
| 07/16/2008 | CN101220807A Lever oil pump capable of eliminating eccentric wear and directly flushing well |
| 07/16/2008 | CN101220806A High power oil-submersible linear electric motor membrane pump |
| 07/16/2008 | CN100402853C Oil pumping unit base position regulator |
| 07/15/2008 | CA2382637C Improved wellbore pump |
| 07/10/2008 | WO2008018040A3 Pump monitor |
| 07/09/2008 | CN201083195Y Chemical composite drive anti-scaling soft plunger oil-well pump |
| 07/09/2008 | CN201083193Y Horizontal well electric latent plunger pump lifting device |
| 07/09/2008 | CN201083192Y Wind power oil extraction device |
| 07/09/2008 | CN201083191Y Double-plunger pipe type spray-proof oil-well pump |
| 07/09/2008 | CN101216028A Hydraulic power oil pump |
| 07/09/2008 | CN101215962A Pumping well drip-free pipe column oil drainage technology |
| 07/03/2008 | WO2008077316A1 Beam pumping unit with a suspended-weight balance mechanism |
| 07/02/2008 | CN201080928Y Hydraulic drive multitime open-close sliding bush normal and reverse circulation jet pump |
| 07/02/2008 | CN201080913Y Strong open-close multilevel elastic seal oil pump |
| 07/02/2008 | CN201080909Y Swelling and shrinkage mobile cartridge type plunger autoroatation centering oil pump |
| 07/02/2008 | CN201080908Y Long plunger elastic seal oil pump |
| 06/26/2008 | DE19634160B4 Hebevorrichtung Hoist |
| 06/25/2008 | CN201078328Y Differential type down-hole hydraulic oil well pump |
| 06/25/2008 | CN201078327Y Eccentric centre long plunger pump |
| 06/25/2008 | CN201078326Y Eccentric centre sand discharging feedback pump |
| 06/25/2008 | CN201078220Y Water injection ductwork hydrodynamic force drive type hydraulic oil pumping system without pole |
| 06/25/2008 | CN201078219Y Beam pumping unit drive type hydraulic oil pumping system without pole |
| 06/25/2008 | CN101205902A Traveling barrel sand-discharging oil-well pump |
| 06/25/2008 | CN101205901A Two-stage flow passage oil-well pump |
| 06/25/2008 | CN101205900A High-inclination horizontal well oil pump |
| 06/25/2008 | CN101205899A Layered injection-production oil-well pump |
| 06/25/2008 | CN101205805A Oil production string |
| 06/21/2008 | CA2613016A1 Y-type fluid end with replaceable suction module |
| 06/19/2008 | WO2008071089A1 Traction drive double-oilwell pumping unit |
| 06/18/2008 | CN201074589Y Multipurpose standing valve for oil-well pump |
| 06/18/2008 | CN201074588Y Locking device for halt of oil extractor |
| 06/18/2008 | CN201074587Y Brake lock of oil extractor |
| 06/18/2008 | CN201074586Y Combination of tubular pile and rod pile for deep pumping in oil pumping well |
| 06/18/2008 | CN201074585Y Buffer for loading oil extractor |
| 06/18/2008 | CN201074584Y Deloading tool for pumping oil down-hole |
| 06/18/2008 | CN201074583Y Ceramic long-plunger short-pump-barrel antiscaling oil-well pump |
| 06/18/2008 | CN100395427C Oil production method with no pole and oil production system |
| 06/11/2008 | CN201071797Y Split type magnetic straight line oil pumping machine for oil field |
| 06/11/2008 | CN101196184A Electric gear pump |
| 06/11/2008 | CN100394027C Single pump barrel two plunger pistons two circulation thick oil pump |
| 06/04/2008 | CN201068858Y Simplified type oil-submersible electric screw pump |
| 06/04/2008 | CN201068853Y Mutually stimulated reversing piston oil extraction units |
| 06/04/2008 | CN101191537A Anti-theft transmission belt automatic tightener |
| 06/04/2008 | CN101191483A Heavy spherical pump with double oil filling |
| 06/04/2008 | CN101191412A Direct current reversing chain reciprocal reciprocating oil pumping method |
| 06/04/2008 | CN101191411A Antiseptic sand-proof underground pumping unit |
| 06/03/2008 | CA2371113C Pump systems and methods |
| 05/28/2008 | CN201065825Y Stroke adjustable energy-saving type hydraulic pumping unit |
| 05/28/2008 | CN201065824Y Pumping unit inertial load buffer |
| 05/28/2008 | CN201065817Y Oil field operation plunger pump |
| 05/28/2008 | CN201065755Y Continuous liquid-discharging device for exploration well testing for oil |
| 05/28/2008 | CN201065754Y Oil-well pump sand-proof device |
| 05/28/2008 | CN101187367A Downhole double screw pump system |