Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04B - Positive-displacement machines for liquids; Pumps › F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
Patents for F04B 47 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (5,485)
09/2003
09/10/2003CN2572040Y Oil suction pump
09/10/2003CN1120931C Bidirectionally normal opened spherical uniflow valve able to discharge sand
09/09/2003US6615925 Pump control method and apparatus
09/09/2003US6615924 Apparatus and system control for the removal of fluids and gas from a well
08/2003
08/28/2003WO2003071095A2 An oil pumping unit with a differential speed direction-switching mechanism
08/27/2003CN2568839Y Anti-corrosion sand-proof oil-well pump
08/27/2003CN2568838Y Throwing type oil-in valve of oil-well pump
08/27/2003CN1438424A Submerged-in-oil electric piston pump
08/21/2003US20030155116 Plunger with multiple jackets
08/20/2003CN2567366Y Continuous liquid-supply oil-well pump
08/20/2003CN2567365Y Rod-type anti-airlock oil-well pump
08/06/2003CN2564777Y Oil-submersible electric piston pump
08/05/2003US6602059 Electric submersible pump assembly with tube seal section
07/2003
07/30/2003CN2563331Y Gas-proof lock oil pump unit
07/30/2003CN2563330Y Steam driving initial sand prevention well large discharge oil pump unit
07/30/2003CN1432717A Hydraulic cylinder type double-well oil pumping unit
07/29/2003US6599095 Pump-off control method of pump jack
07/23/2003CN2561959Y Permanent magnetic submersible motor
07/23/2003CN2561958Y High effective fixed valve of oil sucking pump
07/17/2003US20030133805 Pump-off control interrupter
07/16/2003CN2560771Y Snubbing blowout-preventing pump for environmental protection
07/15/2003US6592332 Pump-off control interrupter
07/15/2003US6591737 Pad plunger assembly with interfitting keys and key ways on mandrel and pads
07/10/2003US20030127220 Wellhead stuffing box support assembly
07/09/2003EP1325207A2 Gas operated pump for use in a wellbore
07/09/2003CN2559810Y 软柱塞泵 Soft piston
07/03/2003US20030121405 Recirculating linear gas drive system
07/02/2003CN2558788Y Viscous oil pump
07/02/2003CN2558787Y Low wearing resistance plunger pump
07/02/2003CN1113167C Positive-displacement pump
07/01/2003US6586900 Method for boosting the output voltage of a variable frequency drive
06/2003
06/26/2003US20030116323 System for, and a method of pumping fluids from a well
06/19/2003CA2365768A1 Apparatus for disabling a reciprocating pump jack during servicing
06/18/2003DE20303958U1 Light-running piston pump is driven by drive motor arranged in frame and activating via drive medium and reduction gear flywheel rotatably arranged also in frame
06/12/2003WO2003048578A1 Rod saver speed control method and apparatus
06/12/2003WO2003048572A1 Solar powered pump
06/12/2003CA2469059A1 Rod saver speed control method and apparatus
06/11/2003CN2555423Y Sucktion balance regulatable reciprocating booster pump
06/11/2003CN2555422Y Electric oil submerged plunger pump
06/11/2003CN2555421Y Oil pump having sand proofing clamp
06/04/2003CN1110881C Submerged pump motor
06/03/2003US6572116 Piston assembly for walking beam compressor
05/2003
05/28/2003CN1420273A Energy-saving pumping unit
05/27/2003US6568475 Isolation container for a downhole electric pump
05/09/2003CA2361350A1 A method and apparatus for shutting down a pumpjack
05/07/2003CN2549209Y Sand-proof device of oil-pump
05/07/2003CN2549206Y Soft plunger pump against sand deposit
05/07/2003CN2549205Y 抽油泵 Pump
05/07/2003CN2549204Y Deep well oil pump
05/07/2003CN2549175Y Flat steel-wire rope oil sucker
05/07/2003CN1415858A Electric oil-immersed plunger pump
05/07/2003CN1107803C Tail beam balancer for beam pumping unit
05/06/2003US6558128 Fluid well pumping system
04/2003
04/30/2003CN2547906Y Movable-barrel sand-preventing oil-well pump
04/30/2003CN2547905Y Long-plunger exhaust sand-preventing oil-well pump
04/30/2003CN2547904Y Deep-extracting oil-well pump
04/30/2003CN2547903Y Long-stroke feed back oil-well pump
04/30/2003CN2547902Y Leakproof, anti-airlock efficient oil-well pump
04/30/2003CN2547895Y Wind water pump
04/29/2003US6554580 Plunger for well casings and other tubulars
04/24/2003WO2003033861A1 Method for servicing a production well and an insert pump for carrying out said method
04/24/2003WO2002068788A3 Well pumping unit driven by linear motor
04/23/2003CN2546651Y Sand stop oil well pump
04/23/2003CN1412436A Equalizing device for well pumping unit
04/17/2003WO2003031815A2 Downhole well pump
04/17/2003WO2002086322A3 Fluid controlled pumping system and method
04/17/2003CA2462609A1 Downhole well pump
04/16/2003CN2545392Y Sealing structure of rod oil well pump
04/09/2003CN2544119Y Sand-proof blocking-resistant oil pump
04/09/2003CN1105241C Reciprocating pump for pumping fluid from underground
04/08/2003US6543543 Pump systems and methods
04/02/2003CN2542826Y Wheel pumping unit
04/01/2003CA2285415C Electric motor of a submersible pump
03/2003
03/26/2003EP1295035A1 Isolation container for a downhole electric pump
03/26/2003CN2541600Y Flexibly trailed tail boom sliding balancer of beam pump
03/25/2003US6537042 Positive-displacement pump
03/19/2003CN1403707A Solar enegy water-pumping accumulation and power generation combined system
03/19/2003CN1403683A Water-replaced oil exploiting method
03/12/2003EP1290780A2 Method for boosting the output voltage of a variable frequency drive
03/12/2003CN2539850Y Oil-well pump
03/11/2003US6531842 Sine wave variable speed drive
03/05/2003CN2538976Y Oil-well pump
03/05/2003CN2538975Y Direct driving oil-well pump
03/05/2003CN2538974Y Oil well layered oil well pump
03/05/2003CN2538956Y Electric reciprocating beam-pumping unit
03/05/2003CN2538941Y Hydraulic automatic pressurizing pump
02/2003
02/28/2003CA2400577A1 Recirculating linear gas drive system
02/27/2003US20030039552 Pad plunger assembly with one-piece locking end members
02/27/2003US20030037920 Pad plunger assembly with concave pad subassembly
02/26/2003CN2537812Y Curved slide beam composite tail beam sliding balance oil pumping unit
02/26/2003CN2537811Y Single crank energy saving oil pumping unit
02/26/2003CN1102203C Control device for enhancing anti-interference nature of hydraulic piston-pump
02/20/2003US20030034161 Pump control method and apparatus
02/19/2003CN2536813Y High efficient large capacity sucker pump
02/19/2003CN2536812Y Piston structure of thick oil pump
02/19/2003CN2536785Y Rotating rod pumping unit
02/12/2003CN2535555Y Low-speed synchronous motor oil-pumping macine
02/05/2003CN2534391Y Energy-saving pumping unit
02/05/2003CN2534390Y High-water-cut producing well oil pumping water flooding double-purpose pump
02/04/2003CA2187578C Pump drive head
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