| 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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| 07/10/2013 | CN203051063U Underground anti-sand burying tubular pile with top-mounted fixing valve oil well pump |
| 07/04/2013 | WO2013070979A3 Low profile rod pumping unit with pneumatic counterbalance for the active control of the rod string |
| 07/03/2013 | CN203035526U Rod pump oil extraction gas prevention technique pipe column |
| 07/03/2013 | CN203035134U Forward and reverse washing well oil-well pump |
| 07/03/2013 | CN102155392B Injection-extraction integrated sand prevention oil-well pump |
| 07/03/2013 | CN101949277B Oil extraction method of weight adding under pump and oil well pump with weight adding under pump |
| 07/02/2013 | US8475147 Gas/fluid inhibitor tube system |
| 07/02/2013 | CA2717720C Calculation of downhole pump fillage and control of pump based on said fillage |
| 06/27/2013 | WO2013012832A9 Adaptive pump control for positive displacement pump failure modes |
| 06/26/2013 | CN203023016U Three-house oil well pump |
| 06/26/2013 | CN103180545A Compact cable suspended pumping system for lubricator deployment |
| 06/26/2013 | CN103174630A Horizontal sand prevention vicious pump |
| 06/20/2013 | WO2013086623A1 Horizontal and vertical well fluid pumping system |
| 06/20/2013 | CA2823495A1 Horizontal and vertical well fluid pumping system |
| 06/19/2013 | CN203009250U Integral oil-well pump for extracting super heavy oil by steam injection |
| 06/19/2013 | CN203009249U Ultra-large-diameter high-displacement oil suction pump |
| 06/19/2013 | CN102022310B Low-differential-pressure synchronous dual-fixed-valve deep-well pump |
| 06/12/2013 | CN202991426U All-directional travelling valve type oil-well pump |
| 06/12/2013 | CN202991425U Efficient exhaust oil pump with lengthened oil return tube |
| 06/12/2013 | CN202991424U Efficient turbine exhaust oil pump |
| 06/12/2013 | CN202991423U Highly-efficient fixing double valve ball exhaust oil well pump |
| 06/12/2013 | CN202991422U High-efficiency sand-preventing gas-exhausting oil well pump |
| 06/12/2013 | CN202991421U High-efficiency gas-exhaust oil well pump with oil baffle plate |
| 06/12/2013 | CN202991420U High-efficiency exhaust oil-well pump |
| 06/12/2013 | CN202991419U Self-aligning de-loading oil well pump driven by linear motor |
| 06/11/2013 | CA2503917C Apparatus and method for reducing gas lock in downhole pumps |
| 06/05/2013 | CN103133339A Two-stage compression oil well pump and oil pump process thereof |
| 06/05/2013 | CN103133338A Novel airproof oil well pump |
| 06/05/2013 | CN103133337A Novel airproof oil well pump and oil pumping technology thereof |
| 06/05/2013 | CN103133336A Middle exhausting gas prevention oil-well pump |
| 06/05/2013 | CN103133335A Middle exhausting gas prevention oil-well pump and oil pumping technology thereof |
| 06/05/2013 | CN103133334A Javelin valve anti-gas pump and oil pumping process thereof |
| 06/05/2013 | CN103133316A Mechanical switch valve oil-well pump and oil pumping technology thereof |
| 06/05/2013 | CN103133315A Mechanical switch valve oil-well pump |
| 06/05/2013 | CN103133314A Annular valve anti-gas pump |
| 06/05/2013 | CN103133313A Oil pumping technique based on annular valve gas-prevention pump |
| 06/05/2013 | CN103133312A Annular valve anti-gas pump and oil pumping technology thereof |
| 06/05/2013 | CN103133311A Oil pumping technology based on javelin valve anti-gas pump |
| 06/05/2013 | CN103133310A Javelin valve anti-gas pump |
| 06/05/2013 | CN103133309A Oil pumping technique based on mechanical open-and-close valve oil well pump |
| 06/05/2013 | CN103133308A Novel airproof oil pumping technology |
| 06/05/2013 | CN103133307A Tubing pump system and oil pumping technology thereof |
| 06/05/2013 | CN103133306A Tubing pump system |
| 06/05/2013 | CN103133305A Oil pumping technique based on tubing pump system |
| 06/05/2013 | CN103133304A Oil pumping technique based on two-stage compression oil well pump |
| 06/05/2013 | CN103133303A Oil pumping technique based on middle venting gas-prevention oil well pump |
| 06/05/2013 | CN103133302A Two-stage compression oil well pump |
| 06/05/2013 | CA2769051A1 Sand check filter |
| 06/02/2013 | CA2769049A1 Rod guide and solids control assembly |
| 05/29/2013 | CN202954948U Dual-purpose sand pump used in oil production well of oil field and coalbed methane production well |
| 05/28/2013 | CA2707376C Device and method for gas lock detection in an electrical submersible pump assembly |
| 05/23/2013 | WO2013071684A1 Direct-drive motor oil-pumping unit |
| 05/22/2013 | CN202946353U Hydraulic oil well pump |
| 05/21/2013 | US8444393 Rod pump control system including parameter estimator |
| 05/21/2013 | CA2710226C Electric submersible pump (esp) with recirculation capability |
| 05/16/2013 | WO2013070979A2 Low profile rod pumping unit with pneumatic counterbalance for the active control of the rod string |
| 05/16/2013 | CA2854557A1 Low profile rod pumping unit with pneumatic counterbalance for the active control of the rod string |
| 05/15/2013 | CN103104480A Novel drilling pump head |
| 05/15/2013 | CN103104475A Novel drilling pump head and pressure boosting method thereof |
| 05/15/2013 | CN103104470A L-shaped pump head of well drilling pump and pressurization method thereof applied to petroleum industry |
| 05/15/2013 | CN103104447A Drilling pump with T-type pump head |
| 05/15/2013 | CN103104446A Overhauling method for oil well pump in oil field |
| 05/15/2013 | CN103104445A Thickened oil energy-saving cross pump thermal collecting oil well pump |
| 05/15/2013 | CN101858332B Multi-section centering self-rotating reducer oil pipe pump |
| 05/11/2013 | CA2794893A1 Cryogenic reciprocating pump intermediate distance piece |
| 05/08/2013 | CN202926569U One-station multi-well type rodless hydraulic oil extraction system |
| 05/08/2013 | CN202926568U Oil-well pump without traveling valve |
| 05/08/2013 | CN202926567U Radial magnetic drive defueling pump |
| 05/08/2013 | CN202926566U Axial magnetically driven defueling pump |
| 05/08/2013 | CN202926565U Sinking storage scale prevention oil well pump |
| 05/02/2013 | WO2013009432A3 Poppet valve with integrated dampener |
| 05/02/2013 | WO2011153011A3 Compact cable suspended pumping system for lubricator deployment |
| 05/01/2013 | CN202914292U Oil-well pump load reduction device |
| 05/01/2013 | CN202914283U Parallel-connection type double-cavity oil well pump |
| 05/01/2013 | CN202914282U Displacement type gas prevention deep sucker rod pump |
| 04/25/2013 | WO2013012832A3 Adaptive pump control for positive displacement pump failure modes |
| 04/25/2013 | CA2792755A1 Sucker rod guide |
| 04/24/2013 | CN202900613U Speed reducer of oil pumping machine |
| 04/24/2013 | CN202900604U Anti-scale-anti-corrosion-type oil extraction deep-well pump |
| 04/24/2013 | CN202900603U Sand-sticking prevention pump |
| 04/24/2013 | CN202900602U Soft-sealing sand control pump |
| 04/24/2013 | CN202900601U High-speed solar energy well pump |
| 04/24/2013 | CN202900600U Oil well pump |
| 04/24/2013 | CN103062023A Intelligent linear-motor oil production system |
| 04/24/2013 | CN103062022A 凸轮活塞式深井泵 Cam piston deep well pump |
| 04/24/2013 | CN103062021A Oil well pump |
| 04/24/2013 | CN102080646B Layer mining anti-gas pump for pumping well |
| 04/24/2013 | CN101781980B Method for balancing reduction gearbox output shaft torque of ventilator and complete-cycle balancing device |
| 04/17/2013 | EP2580476A1 Extracting device having a connecting rod and method for controlling an extracting device having a connecting rod and at least one counterweight |
| 04/17/2013 | CN202883334U Fluid power drive oil well pump |
| 04/17/2013 | CN202883333U Novel oil well pump special for liquid draining and gas production |
| 04/11/2013 | WO2012146234A3 Reverse rotation protection for borehole pumps |
| 04/10/2013 | EP2576973A2 Compact cable suspended pumping system for lubricator deployment |
| 04/10/2013 | CN202867154U Wind power braking oil exploitation pump |
| 04/10/2013 | CN202867153U Antifreezing type oil exploitation pump |
| 04/10/2013 | CN202867152U Fluorescent oil exploitation pump |
| 04/10/2013 | CN202867151U Intelligent oil exploitation pump |
| 04/10/2013 | CN202867150U Solar oil exploration pump |
| 04/10/2013 | CN202867149U Antiscale oil exploitation pump |
| 04/10/2013 | CN202867148U Sand prevention oil exploitation pump |