| 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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| 11/28/2007 | CN200982287Y Lateral opening type hydraulic feed back oil pump |
| 11/28/2007 | CN200982182Y Oil extractor |
| 11/28/2007 | CN200982165Y Limited centralizing ring dedicated for screw pump |
| 11/28/2007 | CN100351419C Anti-corrosion oil pumping rod and its producing method |
| 11/27/2007 | CA2460712C Pass through valve and stab tool |
| 11/21/2007 | CN200978921Y Automatic tensioner for anti-theft drive belt |
| 11/21/2007 | CN200978919Y Girder-like pumping unit belt automatic adjuster |
| 11/21/2007 | CN200978793Y Locking wrist pin for beam-pumping unit |
| 11/21/2007 | CN200978664Y Water-mixing viscosity-reducing pipe column for pump |
| 11/21/2007 | CN101076653A Submersible pump |
| 11/21/2007 | CN101074664A Antiscaling alloy oil sucking pump |
| 11/21/2007 | CN101074663A Oil sucker with eccentric wheel and without beam |
| 11/21/2007 | CN101074599A Automatically-reciprocating hydraulic oil-cylinder cooker hood |
| 11/21/2007 | CN100350156C Rodless hydraulic oil pumping unit |
| 11/14/2007 | CN200975407Y Crank capable of stepless regulating stroke of oil pumping machine |
| 11/14/2007 | CN200975337Y Plunger type unpowered suction device |
| 11/14/2007 | CN200975336Y Double well single power oil pumping machine |
| 11/14/2007 | CN200975335Y Power drive arrangement for implementing free movement of top and bottom damping |
| 11/14/2007 | CN200975334Y Anti-scaling oil production pump |
| 11/14/2007 | CN200975333Y Gearless transmission oil pumping machine |
| 11/14/2007 | CN200975332Y Double-well linear type oil pumping machine |
| 11/14/2007 | CN101070840A Oil-submersible motor pump protection device |
| 11/14/2007 | CN101070838A Wind-power water-pumping machine |
| 11/14/2007 | CN101070837A W-type towing oil-pumping machine |
| 11/14/2007 | CN100348833C Lifter of linear motor with double action for reciprocating pump |
| 11/13/2007 | CA2437860C Well pump capsule |
| 11/07/2007 | CN200971851Y Automatic unloading dual househead pumping unit |
| 11/07/2007 | CN200971848Y Corrosion-proof sand-proof underground beam unit |
| 11/07/2007 | CN200971772Y Relay plunger gas-life oil or gas production device |
| 11/07/2007 | CN101067415A Mechanical automatic control hydraulic driving pumping unit |
| 11/07/2007 | CN101067414A Interanimation reversing piston oil production machine set |
| 11/07/2007 | CN101067413A Sand stop for electric submersible pump |
| 11/07/2007 | CN101067368A Multifunction underwell hydraulic oil producing device |
| 11/06/2007 | CA2450401C Pump bypass system |
| 11/03/2007 | CA2587050A1 Swivelling device for a downhole rod pump |
| 10/31/2007 | CN200968326Y Down-hole axial flow type oil gas mixed pump |
| 10/31/2007 | CN200968280Y Water mixing pumping thickened oil pump |
| 10/31/2007 | CN200968202Y Hydraulic oil production apparatus |
| 10/31/2007 | CN100346072C Sealing structure of oil-well pump and oil-well pump therewith |
| 10/28/2007 | CA2586674A1 Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore |
| 10/24/2007 | CN200965044Y Automatic belt tension device for oil pumping machine |
| 10/24/2007 | CN200964943Y Gas-proof lock valve of oil pump |
| 10/24/2007 | CN200964938Y Boosting type rod pump device |
| 10/24/2007 | CN200964937Y Screw pump driving device for oil well |
| 10/24/2007 | CN200964832Y Extraction-assistant production-increasing device for oil pump |
| 10/24/2007 | CN101059161A Combined speed reducer dedicated for oil pump |
| 10/23/2007 | CA2261415C Method and apparatus for extracting oil |
| 10/19/2007 | CA2568434A1 Plunger lift apparatus |
| 10/18/2007 | WO2007072385A3 System and method for determining onset of failure modes in a positive displacement pump |
| 10/18/2007 | DE10258666B4 Tauchpumpeneinrichtung zur Verwendung in einem Bohrloch Submersible pump device for use in a wellbore |
| 10/17/2007 | CN200961574Y Outer rotor permanent magnet synchronous motor driven crown sheave type pumping unit transmission structure |
| 10/17/2007 | CN200961573Y Balanced type bi-directional deep well oil extraction pump |
| 10/17/2007 | CN101054968A 液力抽油泵 Hydraulic pump |
| 10/17/2007 | CN100343515C Horizontal oil-well pump |
| 10/17/2007 | CN100343514C Contracting and expanding plunger type oil pump of self-revolving integral drum |
| 10/15/2007 | CA2550057A1 Improved production plunger |
| 10/10/2007 | CN200958471Y Ceramic catch beam-pumping unit |
| 10/10/2007 | CN101050765A High power oil-submersible linear permanent magnetic step motor plunger pump |
| 10/10/2007 | CN101050764A Balance type two-way deep well oil pumping |
| 10/03/2007 | CN200955491Y Air-lock-resisting low-resistance liquid drainage pump |
| 10/03/2007 | CN200955490Y Efficient bionical-face sealing valve oil pump |
| 10/03/2007 | CN200955487Y Butterfly-valve equi-diameter anti-sand-block oil pump |
| 10/03/2007 | CN101046189A Wind collecting great power wind driven water pump set |
| 10/03/2007 | CN100340737C Balance weight protector for oil pumping unit |
| 10/02/2007 | US7275592 Oil well pump apparatus |
| 10/02/2007 | US7275590 Submersible pump |
| 09/26/2007 | CN200952467Y Protector with combined two upper independent settling chamber and one bottom capsule chamber |
| 09/26/2007 | CN200952464Y Planetary automatic balancing beam-pumping unit |
| 09/26/2007 | CN200952463Y Hanging immersed thickened oil pump |
| 09/26/2007 | CN101042131A Two-channel high efficiency drawing liquid pump |
| 09/26/2007 | CN100339596C Mfg. Method for integral cylinder stainless steel oil pumping pump |
| 09/25/2007 | CA2492354C Flow control valve |
| 09/20/2007 | WO2007104186A1 A suspensory electrical submersible screw pumping system |
| 09/19/2007 | CN200949641Y Pumping unit belt adjusting device |
| 09/19/2007 | CN200949522Y Combined type protector with a upper capsule chamber and two lower separate sedimentation chamber |
| 09/19/2007 | CN200949520Y Pumping unit brake self-locking device |
| 09/19/2007 | CN200949518Y Rough braid maintenance device of beam-pumping unit |
| 09/19/2007 | CN200949452Y Hydraulic beam-pumping unit |
| 09/18/2007 | US7270187 Flying valve and well production method |
| 09/18/2007 | US7270186 Downhole well pump |
| 09/13/2007 | WO2007041823A8 Method and system for optimizing downhole fluid production |
| 09/12/2007 | CN200946567Y Sliding pumping unit moving device |
| 09/12/2007 | CN200946565Y Horsehead telescopic device for pumping unit |
| 09/12/2007 | CN200946562Y Three-stage speed-reducing drive device of screw pump |
| 09/12/2007 | CN200946487Y Hydraulic pumping device |
| 09/12/2007 | CN200946486Y Hydraulic type downhloe movement-increasing instrument for petroleum pumping unit pumping rod |
| 09/12/2007 | CN101035986A Numerically controlled reciprocating submersible pump apparatus |
| 09/12/2007 | CN101033743A Cantilevered building type balance box beam-pumping unit |
| 09/12/2007 | CN100337035C Linear dynamo pumping unit with built-in stator |
| 09/12/2007 | CN100337034C Hydraulic oil pump |
| 09/12/2007 | CN100337033C Rodless hydraulic oil pumping system |
| 09/07/2007 | WO2007099651A1 Apparatus for marine production |
| 09/05/2007 | CN200943579Y Tungsten-plating base amorphous alloy antiseptic oil pump |
| 09/05/2007 | CN200943578Y Multiple segment plunger self-rotating oil-well pump |
| 09/05/2007 | CN200943576Y Long plunger spiral sand-proof oil-well pump |
| 09/05/2007 | CN200943574Y Large power submersible linear permanent-magnet step motor plunger pump |
| 09/05/2007 | CN200943573Y Reciprocating type submersible electric pump oil extraction device |
| 09/05/2007 | CN200943572Y Base-weighted oil well pump |
| 09/05/2007 | CN200943539Y Oil water mixing and combustion device of internal combustion engine |
| 09/05/2007 | CN200943454Y Taper thread anti-slip abrasive-resistant centralizer for screw pump well |