| 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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| 02/20/2008 | CN201025259Y Sand sediment oil pump and oil valve |
| 02/20/2008 | CN201025257Y Fully automatic hydraulic pressure and reverse rotation prevention device |
| 02/20/2008 | CN201025005Y Oil exploration device for coordination and trip pump of non metal continuous oil pipe |
| 02/20/2008 | CN201024918Y A pole connection centralizer for trapeziform side inserted release preventive screw pump well |
| 02/20/2008 | CN201024917Y A pole wresting spiral centralizer for screw pump well |
| 02/20/2008 | CN201023230Y Balancing device for pumping unit |
| 02/20/2008 | CN101126383A Hydraulic driving gear oil-well pump |
| 02/19/2008 | CA2445296C Apparatus and method for controlling the speed of a pump in a well |
| 02/19/2008 | CA2403060C Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons |
| 02/14/2008 | WO2008017211A1 A surface motor direct-drive sucker-rod screw pump device |
| 02/14/2008 | WO2008017194A1 A rotating wheel and variable moment pumping unit driven by motor |
| 02/14/2008 | CA2671353A1 A motor direct drive rod ground screw pump device |
| 02/14/2008 | CA2658988A1 Pump monitor |
| 02/13/2008 | EP1885994A1 A device for selective movement of well tools and also a method of using same |
| 02/13/2008 | CN201021662Y A gas injection oil exploration pole pump |
| 02/13/2008 | CN201021617Y Dragging dual well oil smoke extractor for rare earth permanent magnetic no gear synchronization |
| 02/12/2008 | US7328748 Thermal actuated plunger |
| 02/06/2008 | CN201016335Y Energy-saving skidded intelligent hydraulic pumping unit |
| 02/06/2008 | CN201016334Y Anti-bumping oil-well pump oil inlet valve |
| 02/06/2008 | CN201016333Y Checking teeth type sliding rail screw |
| 02/06/2008 | CN101117956A Anti-scaling, anti-corrosive and sand prevention ceramic oil-well pump and manufacturing method therefor |
| 01/30/2008 | CN201013880Y Oil pumping machine reduction box theftproof fuel tank cover |
| 01/30/2008 | CN201013587Y Straight-line driving type intermittent rotating screw pump |
| 01/30/2008 | CN201013586Y Waterpower screw pump |
| 01/30/2008 | CN201013577Y Electric pump sand prevention device |
| 01/30/2008 | CN201013576Y Screw pump driving and monitoring apparatus |
| 01/30/2008 | CN201013575Y Duplex bearing bridging beam bearing bracket of oil pumping machine |
| 01/30/2008 | CN201013574Y Oil pumping machine braking locking block |
| 01/30/2008 | CN201013573Y Permanent magnetism synchronous non-gear-wheel driving screw pump type oil production machine |
| 01/30/2008 | CN201013572Y Oil pumping machine base adjuster |
| 01/30/2008 | CN201013318Y Pump collision operation regulator |
| 01/30/2008 | CN201013315Y Multifunctional down-hole hydraulic oil extraction equipment |
| 01/30/2008 | CN201013284Y Oil well junk collecting device |
| 01/30/2008 | CN201012485Y Balance beam type oil pumping machine crank pins pusher |
| 01/30/2008 | CN100365279C Negative pressure oil-well pump |
| 01/23/2008 | CN101109376A Chemical composite driving antiscaling soft plunger oil pump |
| 01/23/2008 | CN101109375A Two-stage down-hole pipe pump oil extracting device |
| 01/23/2008 | CN100363619C Leakage diagnosing method for ground driving screw pump oil production well |
| 01/23/2008 | CN100363617C Scrow oil pumping pump |
| 01/22/2008 | CA2414646C Reciprocating pump control system |
| 01/16/2008 | CN201007271Y High power oil-submersible straight line motor diaphram pump |
| 01/15/2008 | US7318489 Hydraulic motor arrangement and method of operating a hydraulic motor |
| 01/10/2008 | CA2656324A1 Dual cylinder lift pump system and method |
| 01/09/2008 | CN201003485Y Lifting weight balance beam type oil pump |
| 01/09/2008 | CN201003484Y Oil pumping apparatus for machine pump regulation |
| 01/09/2008 | CN101100991A Down-hole oil production screw pump fixer |
| 01/09/2008 | CN101100990A Down-hole screw pump oil production device |
| 01/09/2008 | CN101100935A Continuous liquid-discharging device for exploration well testing for oil |
| 01/08/2008 | US7316542 Fluid level control system |
| 01/03/2008 | US20080003121 Dewatering apparatus |
| 01/03/2008 | US20080000632 Dual cylinder lift pump system and method |
| 01/02/2008 | EP1873349A1 Reciprocating pumping assembly and method with hollow sucker rods and no production tubing |
| 01/02/2008 | CN200999726Y Down-hole double-screw pump system |
| 01/02/2008 | CN200999720Y Composite tumbling-box impulsive motion reduced speed energy conservation oil pumping machine |
| 01/02/2008 | CN200999719Y Beam type oil pumping machine braking bias-wearing regulating device |
| 01/02/2008 | CN200999718Y Oil production well high efficiency oil-well pump |
| 01/02/2008 | CN200999717Y Oil-well pump downhole operation auxiliary device |
| 01/01/2008 | US7314349 Fluid level control system for progressive cavity pump |
| 01/01/2008 | US7314081 Pumping from two levels of a pool of production fluid, and one way valve therefore |
| 01/01/2008 | US7314080 Slidable sleeve plunger |
| 12/29/2007 | CA2551315A1 Reciprocating pumping assembly and method with hollow sucker rods and no production tubing |
| 12/27/2007 | CA2590422A1 Electric progressive cavity pump |
| 12/26/2007 | CN200996468Y Microwave lubricating-oil safety device of reducer for pumping unit |
| 12/26/2007 | CN200996374Y Large-sprue feedback oil-well pump |
| 12/26/2007 | CN200996372Y Heavy spherical pump with double oil filling |
| 12/26/2007 | CN200996286Y Intelligent hydraulic oil extracter |
| 12/26/2007 | CN101092955A Motor driven pumping unit with two dish surfaces |
| 12/26/2007 | CN101092954A Vacuum ground oil blotting depressed machine |
| 12/26/2007 | CN100357598C Gear-type-changing oil pumping device of pump with rod |
| 12/23/2007 | CA2590561A1 Submersible electric motor terminated for auxiliary tools |
| 12/21/2007 | CA2654908A1 Linear rod pump apparatus and method |
| 12/19/2007 | CN200993099Y Mechanical sealing device for screw pump ground driving device |
| 12/19/2007 | CN200993096Y Movable pump valve |
| 12/19/2007 | CN200993093Y Pumping unit balance weight device |
| 12/19/2007 | CN200993092Y Beam pumping unit driven hydraulic cylinder type rodless hydraulic pumping system |
| 12/19/2007 | CN200992995Y Oil well pumping promoter |
| 12/19/2007 | CN200992993Y Energy-saving energizing integrated pipe string |
| 12/19/2007 | CN200992992Y Hydraulic oil-pumping device |
| 12/19/2007 | CN200992991Y Hydraulic driven oil pumping device |
| 12/19/2007 | CN100356062C Hydraulic oil pumping unit for inclined well |
| 12/18/2007 | CA2425604C Gas operated pump for use in a wellbore |
| 12/18/2007 | CA2412144C Isolation container for a downhole electric pump |
| 12/12/2007 | CN200989299Y Reducing piston conjoined separate extracting pump |
| 12/12/2007 | CN200989296Y Crankshaft beam-pumping unit |
| 12/12/2007 | CN101086250A Capsule for downhole pump modules |
| 12/05/2007 | CN200985880Y Oil pumping machine braking safety device |
| 12/05/2007 | CN200985878Y Simple pendulum moment changing balancing beam type Oil pumping machine |
| 12/05/2007 | CN200985877Y Upside-down moment changing type oil pumping machine |
| 12/05/2007 | CN200985876Y Pipe rod fluctuation proof bias-wearing oil gas mixing extraction pump |
| 12/05/2007 | CN200985779Y Oil extraction tubular column |
| 12/05/2007 | CN200985777Y Double tubes type non-rod hydraulic oil pumping system |
| 12/05/2007 | CN101082334A General beam type secondary regulation hydraulic energy saving system of secondary regulation |
| 12/05/2007 | CN101082333A Different diameter |
| 12/05/2007 | CN100353062C Digital control reciprocating oil submersible electric pump |
| 12/05/2007 | CN100353024C Electronic, electrical and mechanical integrated dragging pumping unit |
| 12/05/2007 | CN100353023C Double-acting wheel type long stroke pumping unit |
| 11/28/2007 | CN200982384Y Automatic belt tensioner |
| 11/28/2007 | CN200982293Y Direct-driven submersible electric pump |
| 11/28/2007 | CN200982289Y Linear motor submersible reciprocal oil extraction pump |
| 11/28/2007 | CN200982288Y Highly energy-saving low cost hydraulic balanced type oil pumping unit |