| Patents for F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (5,485) |
|---|
| 12/31/2008 | CN201173186Y Short plunger oil-well pump |
| 12/31/2008 | CN201173180Y Gear device for electric oil-submersible double screw rod oil pump |
| 12/31/2008 | CN201173176Y Double screw rod oil extraction pump device |
| 12/31/2008 | CN201173174Y Oil well dedicated plunger pump |
| 12/24/2008 | WO2007082024A3 Sensor assembly for determining fluid properties in a subsurface well |
| 12/24/2008 | CN201170172Y Multifunctional sand-proof oil-well pump |
| 12/24/2008 | CN201170171Y Anti-scaling oil well pump |
| 12/24/2008 | CN201170165Y Pendulum type portable energy-saving oil pumping machine |
| 12/24/2008 | CN201170164Y Sand-prevention and oil-draining type oil pump |
| 12/24/2008 | CN101328880A Oil well pump |
| 12/17/2008 | CN201165964Y Hydraulic pump, oil pumping unit, oil pumping module and oil pumping system |
| 12/17/2008 | CN201165865Y Oil well thermal cycle oil extraction apparatus |
| 12/17/2008 | CN101324229A Downhole automatic control hydraulic oil pumping machine |
| 12/16/2008 | CA2398589C Pad plunger assembly with concave pad subassembly |
| 12/11/2008 | WO2008148297A1 A hydraulic oil pump |
| 12/10/2008 | EP1660755B1 Portable, surface-mounted well pump |
| 12/10/2008 | CN201162734Y Novel two-stage efflux pump for oil extraction |
| 12/10/2008 | CN201162660Y Hydraulic secondary balancing device of beam pumping unit |
| 12/10/2008 | CN201162659Y Centering type rotary plunger oil-well pump |
| 12/10/2008 | CN201162658Y Screw oil pump |
| 12/10/2008 | CN101319605A Multi-zone production rate regulating column tool for oil-submersible electric pump well and its multi-zone production rate regulating method |
| 12/03/2008 | CN201159159Y Clip type movable brake of oil pumping machine |
| 12/03/2008 | CN201159158Y Balance type beam pumping unit |
| 12/03/2008 | CN201159157Y Loop chain type double-weight counterbalance oil pumping machine |
| 12/03/2008 | CN201159156Y Upper body of oil pump connector |
| 12/03/2008 | CN201159072Y Oil field down-hole rotation type mechanical driving device |
| 12/03/2008 | CN100439753C Oil submerged pump special-purpose speed reducer and process for making same |
| 12/03/2008 | CN100439648C Portable, surface-mounted well pump |
| 12/02/2008 | US7458787 Apparatus and method for reducing gas lock in downhole pumps |
| 12/02/2008 | CA2337976C Pump rod drive and torque release mechanism |
| 11/26/2008 | CN201155449Y Separating pumping separate conveying air discharging lock-preventing oil pump |
| 11/26/2008 | CN201155448Y External valve type hydraulic self-sealing plunger oil pump |
| 11/26/2008 | CN201155447Y Deposition-resisting synergistic oil pump |
| 11/26/2008 | CN100436821C Deep-well pump molded by punching and welding |
| 11/25/2008 | CA2357886C Travelling valve assembly for a fluid pump |
| 11/25/2008 | CA2261250C Wireline retrievable oilwell pumping system |
| 11/20/2008 | US20080283250 Low clearance downhole pump |
| 11/19/2008 | CN201152251Y Beam-pumping unit protection machine control device |
| 11/19/2008 | CN100434701C Hydraulic thrust mechanism of axial force in electrical single-screw submersible pump |
| 11/18/2008 | CA2631417A1 Low clearance downhole pump |
| 11/18/2008 | CA2519328C Instrumented plunger for an oil or gas well |
| 11/18/2008 | CA2517969C A sub-sea pumping system and an associated method |
| 11/18/2008 | CA2232175C Wellhead drive brake system |
| 11/12/2008 | CN201148965Y Movable barrel type straight line motor oil-well pump |
| 11/12/2008 | CN201148964Y Helical sand-scraping anti-corrosive high-efficiency oil-well pump |
| 11/12/2008 | CN201148963Y High-efficiency oil-well pump |
| 11/12/2008 | CN201148962Y Open dental type tail part balance beam-pumping unit |
| 11/12/2008 | CN201148844Y Mechanical water research and water shutoff integrated pipe column |
| 11/12/2008 | CN201148842Y Bias-wearing proof oil pumping pipe pillar |
| 11/12/2008 | CN101305187A System and method for optimizing down-hole fluid yield |
| 11/06/2008 | WO2008131610A1 Pumping nuiit without gear driving |
| 11/05/2008 | CN201144786Y Oil pumping machine brake hoop anti-theft device |
| 11/05/2008 | CN201144785Y Standing valve-salvageable tube-type gasproof oil-well pump |
| 11/05/2008 | CN201144784Y Yield increasing high-efficiency oil-well pump for machinery oil extraction |
| 11/05/2008 | CN201144783Y Electric submersible gear pump |
| 11/05/2008 | CN101298867A Double-work rod oil-well pump |
| 11/04/2008 | US7445435 Double-acting reciprocating downhole pump |
| 11/04/2008 | US7445048 Plunger lift apparatus that includes one or more sensors |
| 10/29/2008 | CN201141355Y Single-crank balance beam type oil pumping machine |
| 10/29/2008 | CN201141354Y Single-crank non-beam pumping unit |
| 10/29/2008 | CN101294614A Energy-saving power unit of oil pumping machine |
| 10/29/2008 | CN101294485A Oil production method and apparatus for horizontal oil well |
| 10/29/2008 | CN101294484A Oil pumping equipment controlled with single stroke machine pump |
| 10/23/2008 | US20080260550 Deep Well Irrigation Pump |
| 10/22/2008 | CN201137565Y Angle crank balance type energy-saving oil pumping machine |
| 10/22/2008 | CN201137564Y Down-hole oil pump |
| 10/22/2008 | CN201137563Y Highly water-bearing rod pumped well double-pipe annulus oiling eccentric-abrasion preventing pipe column |
| 10/22/2008 | CN201137562Y Swirling self-cleaning large flow passage sand-proof oil-well pump |
| 10/22/2008 | CN201137486Y Down-hole cable-free electromagnetic electric heating membrane remixed heating oil extraction device |
| 10/21/2008 | CA2466467C Hydraulic multiphase pump |
| 10/16/2008 | WO2007140436A3 Hydraulically actuated submersible pump |
| 10/09/2008 | US20080247893 High Compression Downhole Pump |
| 10/08/2008 | CN201129297Y Double screw rod electric submersible pump |
| 10/08/2008 | CN201129290Y Reverse circulation hydraulic jet pump |
| 10/08/2008 | CN201129145Y Hydraulic block water pipe pillar |
| 10/07/2008 | US7431572 Hydraulic oil well pumping installation |
| 10/07/2008 | CA2536027C Piston rod retention system |
| 10/03/2008 | CA2628190A1 High compression downhole pump |
| 10/01/2008 | CN201125859Y Direct balance type energy-saving beam-pumping unit |
| 10/01/2008 | CN100423010C Method for implementing complete system of oil diving electric pump |
| 10/01/2008 | CN100422556C Small displacement high lift reciprocating submersible electric pump |
| 10/01/2008 | CN100422555C Control system for a pumping unit |
| 09/30/2008 | US7428923 Top plunger adapter |
| 09/28/2008 | CA2627771A1 Zero emissions reciprocating pump |
| 09/24/2008 | CN201121583Y Extension type full-metal single screw oil pump |
| 09/24/2008 | CN201121572Y Bias-wearing proof anti-sand gas-tight multi-function oil well pump |
| 09/24/2008 | CN100420855C Double-bridge oil-well pump |
| 09/17/2008 | CN101265897A Downhole production and injection pump system |
| 09/10/2008 | CN201111546Y Combination type oil pumping machine |
| 09/10/2008 | CN201111545Y Hydraulic oil production machine |
| 09/03/2008 | CN201110261Y Device for guiding globe valve of oil well pump |
| 09/03/2008 | CN101255907A Transmission system for pump drive |
| 09/02/2008 | CA2488464C Rotary and reciprocal well pump system |
| 08/28/2008 | US20080202768 Device for Selective Movement of Well Tools and Also a Method of Using Same |
| 08/28/2008 | CA2623571A1 Plunger lift controller and method |
| 08/27/2008 | CN201106551Y Multipurpose rapid balance-adjusting crank handle |
| 08/27/2008 | CN201106550Y Deep well coagulation-prevention oil well pump |
| 08/27/2008 | CN201106549Y Hydraulic embedding-disk brake type single screw oil well pump surface drive |
| 08/27/2008 | CN101251102A Antiscaling oil-well pump |
| 08/27/2008 | CN101251100A Sand prevention stop-adding oil-well pump device |