| 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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| 09/05/2007 | CN200942507Y Tool for adjusting balance of pumping unit |
| 08/29/2007 | CN200940563Y Oil output one-way valve of oil pump |
| 08/29/2007 | CN200940560Y Oriented reset type oil pumping valve |
| 08/29/2007 | CN200940559Y Lateral flow type deep production oil pump |
| 08/29/2007 | CN200940558Y Split pumping and mixed output oil pump |
| 08/29/2007 | CN200940557Y Forced valve type bias oil intaking thickening pump |
| 08/29/2007 | CN101025154A Elastic-sealing-valve oil pump |
| 08/29/2007 | CN101025153A Cable-free oil submersible electric pump |
| 08/28/2007 | CA2265289C Bellows motor protector and motor and pumping system incorporating the same |
| 08/22/2007 | EP1642029B1 Pump for tail production of oil |
| 08/22/2007 | EP1108142B1 Vibratory pump improvement |
| 08/22/2007 | CN2937554Y Multifunction protector for tube oil-well pump |
| 08/22/2007 | CN2937552Y Automatic batch-type pumping device |
| 08/22/2007 | CN101021211A Connecting rod composite beam-balance pump |
| 08/22/2007 | CN101021148A Oil production subsurface screw pump anchoring device |
| 08/15/2007 | CN2934661Y Oil well screw pump mechanical transmission ground driving device |
| 08/15/2007 | CN2934659Y Hydraulic piston type oil pumping system |
| 08/15/2007 | CN2934658Y Multi-functional long plunger oil well pump |
| 08/15/2007 | CN2934657Y Combined type sealed single screw oil pump ground drive device |
| 08/15/2007 | CN2934656Y Screw pump oil production device for down-hole |
| 08/15/2007 | CN101016936A Working position adjusting device for large-scale generator |
| 08/15/2007 | CN101016898A Straight line driving reciprocating rotation screw pump |
| 08/15/2007 | CN101016834A Straight line driving screw pump oil production system |
| 08/15/2007 | CN101016833A Energy-storage skid-mounted intelligent hydraulic pumping unit |
| 08/14/2007 | CA2326422C System and method for pumping and heating viscous fluids in a wellbore |
| 08/14/2007 | CA2289286C Tubular junction for tubing pump |
| 08/09/2007 | CA2677178A1 Hydraulic oil well pumping apparatus |
| 08/08/2007 | CN2931852Y Bidirectional piston oil extraction electric pump having oil-submerged magnetic suspension linear motor |
| 08/08/2007 | CN2931851Y Safety adjusting device of pumping unit motor pedestal |
| 08/08/2007 | CN101012824A Hydraulic driving oil pumping device |
| 08/08/2007 | CN101012823A Hydraulic oil pumping device |
| 08/08/2007 | CN101012740A Hydraulic oil pumping device |
| 08/07/2007 | US7252148 Plunger actuated pumping system |
| 08/07/2007 | CA2259067C Adjustable shroud for a submergible pumping system and pumping system incorporating same |
| 08/01/2007 | CN2929317Y Pressure bearing type bias coupling |
| 08/01/2007 | CN2929251Y Tubular deep well oil pump supercharger |
| 08/01/2007 | CN2929250Y Machinery seal bottom fixed screw oil pump power head |
| 08/01/2007 | CN2929176Y Submersible double well hydraulic oil pumping machine |
| 08/01/2007 | CN101010512A Pump jack apparatus and pumping method |
| 08/01/2007 | CN101008433A Belt tension device of pumping unit |
| 08/01/2007 | CN101008408A Normal and reverse circulating jet pump with hydraulically-driven multiple switching sliding sleeve |
| 08/01/2007 | CN101008381A Pumping system of rodless piston pump |
| 08/01/2007 | CN101008380A Lifting device of electric submersible piston pump in horizontal wells |
| 07/31/2007 | CA2576538A1 Improved hollow sucker rod connection with second torque shoulder |
| 07/31/2007 | CA2254747C Method and apparatus for controlling a submergible pumping system |
| 07/26/2007 | US20070172364 Hydraulic gravity ram pump |
| 07/25/2007 | CN2926581Y Bidirectionally balanced walking beam style double donkey oil sucker with normal cranks for double wells |
| 07/25/2007 | CN2926580Y Multi-stage sandproof oil pump |
| 07/25/2007 | CN2926579Y Long-stroke intelligent adhesive-tape oil-pumping unit |
| 07/25/2007 | CN2926578Y Gap oil pump |
| 07/25/2007 | CN101004171A Straight oil pumping unit of direct current of hidden oil |
| 07/18/2007 | CN2924070Y Two-way oil pump |
| 07/18/2007 | CN2923995Y Labyrinth-type limited casing tube of resetting by touch and go |
| 07/17/2007 | CA2452708C Hydraulic oil well pump drive system |
| 07/11/2007 | CN2921366Y Separate extracting separate delivery oil-well pump |
| 07/11/2007 | CN2921365Y Driving structure for beam-pumping unit sucker rod |
| 07/10/2007 | CA2259119C Connection module for a submergible pumping system and method for pumping fluid using such a module |
| 07/05/2007 | WO2007073633A1 An improved jet well pump |
| 07/04/2007 | CN2918798Y Series-wound laminated oil extraction screw pump |
| 07/04/2007 | CN2918797Y Laminated oil extraction screw pump |
| 07/04/2007 | CN2918790Y Hydraulic booster system for oil well re-injection sucker-rod pump |
| 07/04/2007 | CN1991170A Double mule head secondary regulation hydraulic pumping unit |
| 06/28/2007 | CA2630446A1 System and method for determining onset of failure modes in a positive displacement pump |
| 06/27/2007 | CN2917072Y Cup type silt-proof submerged linear motor |
| 06/27/2007 | CN2916190Y Multi-valve sand-prevention electro-submersible plunger pump |
| 06/27/2007 | CN2916189Y Oil drainage type anti-sand oil well pump |
| 06/27/2007 | CN2916188Y Electromagnetic dual-plunger oil well pump |
| 06/27/2007 | CN2916187Y Hydraulic pressure-transmissible oil well pump |
| 06/20/2007 | CN2913676Y Automatic torque-change pumping unit |
| 06/20/2007 | CN1982713A Rodded thickened-oil pump |
| 06/20/2007 | CN1982710A Sandproof feedback thickened oil pump |
| 06/13/2007 | EP1794454A1 Wellbore-external underwater pump |
| 06/13/2007 | CN2911253Y Periodic exhausting oil well pump |
| 06/13/2007 | CN2911252Y Reciprocating layered, integrated extracting submersible pump |
| 06/13/2007 | CN2911251Y Plunger type deep well pump |
| 06/13/2007 | CN2911250Y D.C.linear pumping unit used in oil |
| 06/06/2007 | EP1660776B1 Galvanic corrosion protection apparatus for a pump |
| 06/06/2007 | CN2908913Y Internal tooth reduction gear for beam pumping unit |
| 06/06/2007 | CN2908912Y External tooth reduction gear for beam pumping unit |
| 06/06/2007 | CN2908861Y Piston of combined oil-well pump |
| 06/06/2007 | CN2908856Y Short-plunger long-stroke oil-well pump |
| 06/06/2007 | CN2908855Y Test, perforation and sampling combination pump |
| 05/30/2007 | CN2906209Y Single-crank double-stoke flexible type pumping unit driving member |
| 05/30/2007 | CN2906138Y Subsurface progressing cavity pump anchoring device for oil production |
| 05/30/2007 | CN2906132Y Dirty oil and waste liquid reclaiming pump |
| 05/30/2007 | CN2906131Y Ground driving gear of direct-drive type screw pump without retarder |
| 05/30/2007 | CN2906130Y Long-plunger and short pump-barrel triplex anti-fouling oil well pump |
| 05/30/2007 | CN2906129Y Frequency conversion drive device for direct drive type screw pump |
| 05/30/2007 | CN2906128Y Ground driving gear of divided screw oil well pump |
| 05/30/2007 | CN2906052Y Pipe-free pumping unit |
| 05/30/2007 | CN2906036Y Underground damper for liquid unloading and gas production by using plunger |
| 05/30/2007 | CN2906035Y Ground damper for liquid unloading and gas production by using plunger |
| 05/29/2007 | CA2261299C Rod guide with both high erodible wear volume and by-pass area |
| 05/23/2007 | CN2903479Y Oil pumping pump piston assembly |
| 05/23/2007 | CN2903474Y Reciprocating layered combined producing dual pumping oil-submersible electric pump |
| 05/23/2007 | CN2903473Y Reciprocating dual action oil-submersible electric pump |
| 05/23/2007 | CN2903472Y Large channel solid plunger rod type oil pump |
| 05/23/2007 | CN2903471Y Screw pump direct driving apparatus |
| 05/22/2007 | US7219723 Integrated control system for beam pump systems |
| 05/22/2007 | US7219593 Saturation-proof hydraulic control device that is composed of two or more elements |