| Patents for F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (5,485) |
|---|
| 06/30/2004 | CN2622427Y Long plunge sand-resisting oil pump |
| 06/30/2004 | CN2622426Y Multi-function bottom valve for oil pump |
| 06/29/2004 | US6755628 Valve body for a traveling barrel pump |
| 06/23/2004 | CN2621230Y Beam-pumping unit driven by linear electric motor |
| 06/17/2004 | US20040112586 Wellhead hydraulic drive unit |
| 06/15/2004 | US6749017 Full automatic machine for oil extraction |
| 06/15/2004 | CA2299486C 1 1/2 piston force pump |
| 06/09/2004 | CN1503879A Fluid controlled pumping system and method |
| 06/09/2004 | CN1503868A Method for hydraulic subsea dredging |
| 06/08/2004 | US6746221 Traveling valve for sucker rod pumps |
| 06/08/2004 | US6746213 Pad plunger assembly with concave pad subassembly |
| 05/26/2004 | CN2617953Y Bridge inlet channel device of piping oil well pump |
| 05/26/2004 | CN2617952Y Bailing pump |
| 05/25/2004 | CA2131192C Hydraulic oil well pump drive system |
| 05/19/2004 | CN2616712Y Efficient air-trapping oil-well pump |
| 05/19/2004 | CN2616711Y Sand-washing oil-well pump |
| 05/19/2004 | CN2616710Y Sand pump for oil field and oil well |
| 05/19/2004 | CN2616709Y Dual-suction separative-production two-functional deep-well pump for pumping well |
| 05/13/2004 | WO2004040137A1 Control system for a pumping unit |
| 05/06/2004 | US20040084179 Reciprocating pump control system |
| 05/06/2004 | EP0986161B1 Motor for submerged pump |
| 05/05/2004 | CN2614278Y Oil-well pump slag-proofing apparatus |
| 05/05/2004 | CN2614277Y Rotary motion oil-well pump |
| 04/29/2004 | CA2409985A1 Rotary drive downhole pumping system |
| 04/28/2004 | CN1492127A Oil pipe dumping oil detecting and water exploring method and dump pump |
| 04/21/2004 | CN2612821Y Oil-well pump seizure proof faner apparatus |
| 04/21/2004 | CN2612820Y Sand-resistant oil-well pump |
| 04/14/2004 | CN2611633Y Breaking-proof upper oil output valve |
| 04/14/2004 | CN2611629Y Standing valve salvagable oil-well pump |
| 04/07/2004 | CN2610117Y Antiscale oil-well pump |
| 04/07/2004 | CN2610116Y Sand-proof oil-well pump |
| 04/01/2004 | US20040064292 Control system for centrifugal pumps |
| 04/01/2004 | US20040062658 Control system for progressing cavity pumps |
| 04/01/2004 | US20040062657 Rod pump control system including parameter estimator |
| 03/31/2004 | CN1485542A Walking beam type corotating and counter-rotating pumping unit |
| 03/30/2004 | CA2188886C Flexible plunger apparatus for free movement in gas-producing wells |
| 03/10/2004 | CN2606200Y Cup-shaped piston oil well pump |
| 03/04/2004 | WO2003031815B1 Downhole well pump |
| 03/02/2004 | US6699019 Reciprocating windmill pumping system |
| 02/24/2004 | US6695594 Vibratory pump improvement |
| 02/24/2004 | US6695060 Downhole pumping system |
| 02/24/2004 | US6694858 Recirculating linear gas drive system |
| 02/17/2004 | US6691787 Gas operated pump for use in a wellbore |
| 02/11/2004 | EP1387959A2 Fluid controlled pumping system and method |
| 02/11/2004 | CN1138067C Water pump |
| 02/05/2004 | US20040020638 Mechanically actuated gas separator for downhole pump |
| 02/04/2004 | CN2602189Y Double acting oil-well pump with feedback force |
| 02/03/2004 | US6685451 Valve assembly for sucker rod operated subsurface pumps |
| 01/29/2004 | US20040018101 Adjustable valve rod and pull tube guide for downhole pumps |
| 01/22/2004 | US20040012200 Lower pull tube adapter |
| 01/14/2004 | CN2599279Y Rodless automatic oil well pump for deep well |
| 01/07/2004 | CN2597709Y Hydraulic oil pump |
| 12/31/2003 | WO2004001185A1 A pumping unit with a curved and folded walking beam |
| 12/31/2003 | WO2004001184A1 An oil pumping unit with a supporting pipe |
| 12/31/2003 | WO2003031815A3 Downhole well pump |
| 12/31/2003 | CN1464195A Combination oil-well pump |
| 12/31/2003 | CN1133009C Load reducer for petroleum well |
| 12/30/2003 | US6669449 Pad plunger assembly with one-piece locking end members |
| 12/24/2003 | CN2594493Y Energy-saving load reduced deep-well oil sucking pump |
| 12/17/2003 | EP0890025B1 Sucker rod pump actuating device |
| 12/10/2003 | CN2591272Y Condensed oil pump with weighing rod under pump |
| 12/10/2003 | CN2591271Y Oil pipe pump |
| 12/09/2003 | US6659741 Travelling valve assembly for a fluid pump |
| 12/09/2003 | CA2312177C Downhole pump with bypass around plunger |
| 12/02/2003 | US6655224 Downward offset barbell type walking beam compositively balance oil pump |
| 12/02/2003 | CA2250726C Pump-off controller |
| 11/26/2003 | CN1128929C Metal elastic-sealed oil pump |
| 11/20/2003 | US20030215337 Wellbore pump |
| 11/13/2003 | WO2003093636A1 Flying valve and well production method |
| 11/12/2003 | CN2585988Y Elastic dynamic antiscale and sand-proof tube |
| 11/12/2003 | CN1127622C Cylindrical chain low type long-stroke pumping unit |
| 11/12/2003 | CN1127611C Method of water replacing to product petroleum |
| 11/11/2003 | CA2403439C Method of pumping liquids from a well |
| 11/06/2003 | US20030205864 Rotary sealing device |
| 11/05/2003 | EP0840835B1 Improvements in deep well pumping apparatus |
| 11/05/2003 | CN2584868Y Split extracting dual pump |
| 11/05/2003 | CN2584867Y Double fluid dual pumping pump |
| 11/04/2003 | US6640896 Mechanical oil recovery method and system with a sucker rod pump |
| 11/04/2003 | CA2240606C Controller for oil wells using a heated probe sensor |
| 10/30/2003 | US20030202889 Reciprocating windmill pumping system |
| 10/28/2003 | US6637509 Wellhead stuffing box support assembly |
| 10/22/2003 | CN2581727Y Single pump double action oil pump |
| 10/16/2003 | US20030192697 Isolation container for a downhole electric pump |
| 10/15/2003 | CN2580145Y Self rotary plunger oil pump |
| 10/15/2003 | CN2580144Y Long piston ring seal short tube oil pump |
| 10/15/2003 | CN2580143Y Sealing and anchoring device for hot production rod pump |
| 10/09/2003 | WO2003083303A1 Submerged electro-hydraulic device |
| 10/08/2003 | CN2578555Y Oil pumping units |
| 10/08/2003 | CN2578522Y Three-fold beam sucker |
| 10/01/2003 | CN1122757C Vertically reciprocating pump |
| 09/25/2003 | WO2003078837A1 Hydraulic automatic boosting pump |
| 09/25/2003 | US20030181288 Drive efficiency enhancing system |
| 09/24/2003 | EP1346107A1 Method for hydraulic subsea dredging |
| 09/24/2003 | CN2575327Y Hydraulic gear pump |
| 09/18/2003 | US20030174450 Water supply |
| 09/17/2003 | CN2573726Y Effective valve for pumping well |
| 09/17/2003 | CN2573725Y Elastic expansion nano-ring sand control pump |
| 09/16/2003 | US6619931 Bladder pump for liquid sampling and collecting |
| 09/10/2003 | CN2572046Y Plunger assembly for oil suction pump |
| 09/10/2003 | CN2572041Y Pipe type oil pump fixing valve |