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)
01/1995
01/18/1995	CN1097487A Pumping unit drive system
01/17/1995	US5382142 Wall pump having backwash valve actuator
01/17/1995	CA1333962C Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance
01/12/1995	WO1995001508A1 Well head sucker rod pump
01/11/1995	EP0632867A1 Methods and apparatus for recovering pollutants
01/11/1995	CN2187234Y Long-stroke beamless pumping unit
01/11/1995	CN2187233Y Rod oil-swell pump
12/1994
12/28/1994	CN2186316Y Forced oil-well pump
12/27/1994	US5375657 Chain long-stroke oil-well pumping unit
12/21/1994	CN2185815Y Combined oil-well pump with sand-proof tough for pump barrel
12/20/1994	CA1333546C Long stroke well pumping unit with carriage
12/13/1994	US5372488 Oil well pump with radially expandable interlocking seal ring
12/13/1994	US5372482 Detection of rod pump fillage from motor power
12/01/1994	DE4413940A1 Sludge pump
11/1994
11/23/1994	CN1095453A Towed moment-changing beam-balanced pumping unit
11/19/1994	CA2123920A1 Electromagnetic coupling
11/16/1994	CN2182893Y Chain type long stroke oil pumping machine
11/15/1994	US5363912 Electromagnetic coupling
11/09/1994	CN2182286Y Beam-pumping unit
11/09/1994	CN2182285Y Gas injection and oil pumping two purpose oil-well pump
11/08/1994	US5362206 Pump control responsive to voltage-current phase angle
11/02/1994	CN2181581Y Power device for beam-pumping unit
10/1994
10/26/1994	CN2180776Y Double-head multi-well oil pump
10/26/1994	CN1094120A Pump with reciprocating air motor
10/25/1994	US5358384 Device and method to relieve cordelle action in a chain driven pump
10/25/1994	CA2028432C Water well pump
10/19/1994	CN2179918Y Energy-saving counterweight balanced chain beam-pumping unit
10/11/1994	US5353870 Well purging and sampling pump
10/04/1994	US5351752 For extracting oil and the like from an underground source
09/1994
09/29/1994	DE4409820A1 Determining the state of filling of a rod pump from the motor output
09/29/1994	DE4409818A1 Determining the beam position in a rod pump from the motor output
09/28/1994	CN2178289Y Easy to control type liquid aspirating device
09/28/1994	CN2178288Y Internal rotary wheel energy-saving oil pump
09/27/1994	CA2117044A1 Electrical submersible pump discharge head
09/24/1994	CA2119907A1 Rod pump beam position determination from motor power
09/24/1994	CA2119905A1 Detection of rod pump fillage from motor power
09/21/1994	CN2177820Y 抽稠油泵 Pumping heavy oil
09/21/1994	CN1092500A Well closing water and oil suction method and equipment
09/20/1994	US5348452 Pump mounting structure of canned submersible motor for deep well pump
09/20/1994	US5348137 Vertical tensioning and anti-rotational device for use with single continuous rope conveyor lifting system
09/15/1994	DE4307329A1 Bore hole lifting pump for pumping out gas-containing liquids
09/15/1994	DE4307327A1 Bore hole lifting pump
09/14/1994	CN2177108Y DC lift type oil pump
09/07/1994	CN2176452Y Pump for injection and suction
09/07/1994	CN2176428Y Device of oil extractor for buffer and increasing output
09/07/1994	CN1091811A Method of whole dynamic balance for beam-pumping unit
08/1994
08/31/1994	CN2175838Y Inertial energy-saving power unit
08/24/1994	CN2175317Y Motion-compounded wheel teech bar oil pump
08/10/1994	CN2173869Y Axial force balancing device for high head submerged pump
08/09/1994	US5336061 Solar powered relatively balanced pumping system
08/02/1994	US5333684 Downhole gas separator
07/1994
07/27/1994	CN2172815Y Hydraulic swing link beam-pumping unit
07/20/1994	CN2172343Y Well oil extracting unit without oil pipe
07/13/1994	EP0373202B1 Piston pump for multiphase fluids and applications thereof
07/13/1994	CN2171701Y Numerical control wind-power beam-pumping unit
07/12/1994	US5327961 Drive head for downhole rotary pump
07/06/1994	CN2171019Y Wheel type long stroke energy-saving oil pump
06/1994
06/29/1994	CN2170392Y Oil well pumping unit
06/29/1994	CN2170391Y Closing piece type beam rating position-offering mechanism for beam-pumping unit
06/29/1994	CN2170390Y Crank drum long-stroke pumping unit
06/29/1994	CN1088665A High-efficient energy-saving lever oil pumping machine
06/22/1994	CN2169708Y Swing rod wheel double well oil pump
06/22/1994	CN1088293A long-stroke equalizing beam-pumping unit
06/21/1994	US5322119 Submersible well probe sleeve
06/15/1994	CN2168950Y Holder for well tube
06/08/1994	CN2168096Y Pumping unit
06/01/1994	CN2167216Y Starting arrangement for hydraulic pump
06/01/1994	CN2167215Y Combination type oil pumping machine
06/01/1994	CN2167214Y Chain wheel type oil pumping machine using low power
05/1994
05/31/1994	US5316085 Method of recovering contaminated subterranean fluids from a wellbore
05/31/1994	CA1329894C Apparatus for removing fluid from the ground and method for same
05/25/1994	CN2166257Y Feedback type hollow oil-well pump
05/24/1994	US5314025 Fluid pumping apparatus and method of pumping fluid
05/24/1994	US5314016 Method for controlling rod-pumped wells
05/18/1994	CN2165261Y Double crank rocker type beam pumping unit
05/18/1994	CN2165260Y Worm oil pumping unit
05/18/1994	CN2165259Y Energy-saving beam-free oil pumping unit
05/11/1994	CN2164474Y Numerical controlled oil pump combined use with well extracting frame
05/10/1994	US5309992 Pulley-drive lifting system
05/04/1994	CN2163886Y Vibration damper for beam-pumping unit
04/1994
04/21/1994	DE4234809A1 Hydraulic drive for petroleum pump - has electric motor with set of oil pumps and motors feeding oil to actuator for petroleum pump
04/20/1994	CN1085632A Digital-control supercritical beam-pumping unit
04/13/1994	CN2161751Y Crank balance wheel type oil pumping unit
04/13/1994	CN2161750Y Balance device of oil pumping unit
03/1994
03/31/1994	WO1994006997A1 Submersible well probe sleeve
03/29/1994	US5297943 Electrical submersible pump discharge head
03/23/1994	CN2159463Y Direction reverser for chain oil sucker
03/16/1994	CN2158933Y Beam-pumping unit with superlong stroke and special chain
03/09/1994	CN2158444Y Apparatus for mounting or dismounting section of piston pump in well of oil-field
03/08/1994	US5291777 System for monitoring oil well performance
03/02/1994	CN2157999Y Stroke doubler for well pump
03/02/1994	CN2157998Y Gas-filling flexible assembling core rod of oil-well pump
03/02/1994	CN2157997Y Multi-function valve for tubing pump
03/02/1994	CN1083180A Crank-drum long-stroke pumping unit
03/01/1994	US5290159 Downhole pump of constant differential hydraulic pressure
03/01/1994	US5290156 Walking beam compressor assembly
03/01/1994	US5290154 Scroll compressor reverse phase and high discharge temperature protection
02/1994
02/23/1994	CN2157333Y Oil injection stopping-up removing pump
02/23/1994	CN2157332Y Butt long and short combined pump barrel for pumping unit
02/23/1994	CN1082670A Tower crane type oil pumping machine

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