| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 05/22/2013 | CN202946114U Sucker rod anti-fouling device |
| 05/22/2013 | CN202946092U Oil-wiping oil-receiving device of well mouth electric cable anti-spraying device |
| 05/22/2013 | CN103114590A Device for cleaning bored pile steel protective case inner wall mud and application method thereof |
| 05/22/2013 | CN103113864A Temporary blocking agent, composite blockage removal agent and combined blockage removal method using temporary blocking agent and composite blockage removal agent |
| 05/22/2013 | CN102040992B Rod blockage prevention liquid for carbon dioxide huff-puff enhanced oil recovery and injection method thereof |
| 05/16/2013 | WO2012173860A3 Time-delay fluids for wellbore cleanup |
| 05/16/2013 | US20130118747 Cleanup Fluids for Anhydrous Borate Compounds and Methods for Use Thereof in Subterranean Formations |
| 05/15/2013 | CN103104218A Electromagnetic paraffin prevention paraffin viscosity reduction device capable of changing frequency and strong field |
| 05/14/2013 | CA2599211C Use of water-soluble alkane sulfonic acids for increasing the permeability of underground petroliferous and/or gas-bearing carbonate rock formations and for dissolving carbonate contaminants and/or contaminants containing carbonates during petroleum production |
| 05/10/2013 | WO2013066527A1 System and method for converting class ii hydrate reservoirs |
| 05/10/2013 | CA2853632A1 System and method for converting class ii hydrate reservoirs |
| 05/08/2013 | EP2588557A2 Breaker and displacement fluid |
| 05/08/2013 | CN202926290U Electromagnetic wax-proof and scale-proof viscosity reducing device |
| 05/07/2013 | US8434556 Apparatus and methods for removing mercury from formation effluents |
| 05/07/2013 | CA2661382C Expandable mill and methods of use |
| 05/02/2013 | WO2013036333A3 Dynamic self-cleaning downhole debris reducer |
| 05/02/2013 | US20130105163 Method of opening productive formations and a working fluid provided therefor |
| 05/02/2013 | DE10361983B4 Verfahren und Vorrichtung zur Intensivierung der Durchlässigkeit von bohrungsnahen Bodenschichten sowie von Filterkörpern und Filterschichten in Brunnen und anderen Förderbohrungen Method and apparatus for intensifying the permeability of hole near the bottom layers and of filter bodies and filter layers in wells and other production wells |
| 05/01/2013 | CN202914040U Paraffin removal device of oil gathering pipeline |
| 05/01/2013 | CN202914039U Hydraulic type sleeve scraper |
| 05/01/2013 | CN103075131A Open hole gravel packing tool and open hole gravel packing method for horizontal well |
| 05/01/2013 | CN103075130A Solar electromagnetic wax-proofing viscosity reduction device |
| 04/30/2013 | US8430162 Continuous downhole scale monitoring and inhibition system |
| 04/30/2013 | CA2582275C Self-cleaning well control fluid |
| 04/25/2013 | WO2013022648A3 Electrolytic composition for degrading polymeric filter cake |
| 04/25/2013 | WO2012123756A3 Fluid-actuated downhole tool |
| 04/25/2013 | US20130098623 Low Dosage Kinetic Hydrate Inhibitors for Natural Gas Production Systems |
| 04/24/2013 | CN202900171U Wellhead fine filter backwash device for water injection well |
| 04/24/2013 | CN202900170U Indoor evaluation device for microorganism wax removal and control |
| 04/24/2013 | CN202900169U Dosing device of water injection pump |
| 04/24/2013 | CN202900168U Hydraulic control sleeve scraper |
| 04/24/2013 | CN202900167U Novel paraffin scraper |
| 04/24/2013 | CN202900166U Novel sucker rod righting paraffin scraper |
| 04/24/2013 | CN202900057U Tubing string for paraffin removal from oil well |
| 04/24/2013 | CN103061712A Rotary flow pickling method and device for removing contaminations in near-wellbore area of oil and gas well |
| 04/24/2013 | CN103061711A Application of ultrasonic waves in oilwell unplugging |
| 04/24/2013 | CN103061710A Liquid increasing device for washing wells |
| 04/23/2013 | US8424600 Methods and systems for treating subterranean wells |
| 04/18/2013 | WO2012052759A3 Fluid injection device |
| 04/17/2013 | EP2580422A1 Device and method for producing high-pressure pulses |
| 04/17/2013 | CN202882853U Low-permeability oilfield well head accurate measuring continuous dosing device |
| 04/17/2013 | CN202882852U Agent adding automatic control device of alkaline-surfactant-polymer flooding well |
| 04/17/2013 | CN202882851U Dual purpose self-sealing oil wiper |
| 04/17/2013 | CN202882850U Solar energy hybrid excitation paraffin prevention and viscosity reduction device |
| 04/17/2013 | CN202882825U Low water resistance drifting size gauge |
| 04/17/2013 | CN202882806U Drill column type debris bed eliminating tool |
| 04/17/2013 | CN202882794U Centralizer for sand-lifting pumping-assistant sucker rod of pumping well |
| 04/17/2013 | CN103046901A Novel mechanical paraffin cleaning hoist applied to petroleum field |
| 04/17/2013 | CN103046900A Novel hydraulic paraffin removal drum shaft assembly structure |
| 04/17/2013 | CN103043549A Mechanical paraffin cleaning hoist applied to field of petroleum |
| 04/17/2013 | CN102250601B Composite blocking remover for oil well and application method thereof |
| 04/16/2013 | CA2656344C Methods and compositions for protecting steels in acidic solutions |
| 04/11/2013 | WO2013051958A1 Method for reviving the working condition of a well and technical complex for the implementation of same |
| 04/10/2013 | CN202866757U Oil tube oil wiper installed on well mouth |
| 04/10/2013 | CN202866756U Well group electromagnetic paraffin-proof device |
| 04/10/2013 | CN202866755U Energy-saving electromagnetic paraffin resistant device |
| 04/10/2013 | CN102720466B Special alloy wax-proofing tool |
| 04/09/2013 | US8413721 Viscosified fluids for remediating subterranean damage |
| 04/04/2013 | US20130081821 Reinforcing Amorphous PLA with Solid Particles for Downhole Applications |
| 04/03/2013 | CN202850950U Logging cable sludge scraper |
| 04/03/2013 | CN101684725B Control method and device of burner in oil-field hot-washing wax remover |
| 04/02/2013 | US8408308 Apparatus and method for increasing the amount of dynamic underbalance in a wellbore |
| 04/02/2013 | US8408307 Wellbore cleaning method and apparatus |
| 04/02/2013 | CA2473017C Well chemical treatment utilizing plunger lift deliver system |
| 03/28/2013 | WO2013043836A1 Fluid sample cleanup |
| 03/28/2013 | CA2849144A1 Fluid sample cleanup |
| 03/27/2013 | CN202832460U Acidifying sand blower of horizontal well |
| 03/27/2013 | CN202832396U Water injection well medicine adding device |
| 03/27/2013 | CN202832395U Water injection well head high-pressure spray chemicals dosing device |
| 03/27/2013 | CN202832394U Novel hydraulic scraper for all-in-one operation |
| 03/27/2013 | CN202832393U Drifting scraping integration tool |
| 03/27/2013 | CN202832392U Novel oil pumping pipe wax scraper |
| 03/27/2013 | CN202832391U Oil well single-tool double-edge dirt scraping device |
| 03/27/2013 | CN202832390U Hot washing wax melting device |
| 03/27/2013 | CN102996098A Construction process for filling horizontal well casing with gravel |
| 03/27/2013 | CN102994061A Wax cleaning agent for hot water dispensing deep well high-pour point wax |
| 03/21/2013 | WO2013038100A1 Inhibitors of top-of-line corrosion of pipelines conveying crudes from extraction of hydrocarbons |
| 03/21/2013 | WO2012156735A3 Perforating drill string assembly |
| 03/21/2013 | WO2012027591A3 Articles and methods for reducing hydrate adhesion |
| 03/21/2013 | US20130068463 Fluid Sample Cleanup |
| 03/21/2013 | CA2847593A1 Method and apparatus for unplugging hydrocarbon drains or vents |
| 03/20/2013 | EP2569506A1 Method for combined cleaning and plugging in a well, a washing tool for directional washing in a well, and uses thereof |
| 03/20/2013 | CN202810795U Self-help dosing device at wellhead |
| 03/20/2013 | CN202810794U Graded type reducing sucker rod sucker pipe wax scraper |
| 03/20/2013 | CN202810793U Sucker rod centralizing paraffin scraping device |
| 03/20/2013 | CN202810792U Electromagnetic wax-proof viscosity-reducing device |
| 03/20/2013 | CN202810791U Novel dropping-preventive device for paraffin scraping plumb bob |
| 03/20/2013 | CN202810787U 多功能热洗阀 Multifunction hot wash valve |
| 03/20/2013 | CN102979482A Butt jointing and diverting means for chemical agent channel outside oil pipe in downhole |
| 03/19/2013 | US8397818 Method and device for cleaning a cavity in a petroleum well |
| 03/14/2013 | WO2013036333A2 Dynamic self-cleaning downhole debris reducer |
| 03/13/2013 | CN202788760U Butterfly-shaped drum-type double-edge paraffin-scraping device for oil well |
| 03/13/2013 | CN202788759U Oil wiper of sucker rod |
| 03/13/2013 | CN202788758U High pressure well flushing car specially used in oil field |
| 03/13/2013 | CN202788757U Hot oil paraffin removal vehicle |
| 03/12/2013 | CA2662933C In situ fluid formation for cleaning oil-or synthetic-oil-based mud |
| 03/07/2013 | US20130056216 Dynamic Self-Cleaning Downhole Debris Reducer |
| 03/06/2013 | CN202767950U Thermal washing wax-melting device of thickened oil |
| 03/06/2013 | CN202767949U Wax removal through thermal wash monitoring system of oil well |
| 03/06/2013 | CN202767948U Novel electromagnetic paraffin control device |