| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 09/07/2011 | CN101358515B Well cleanout shunt |
| 09/07/2011 | CN101324181B Integral locking-proof oil dragging pump |
| 09/06/2011 | CA2450551C Technique for preventing deposition products from impeding the motion of a movable component |
| 08/31/2011 | CN201953333U 一种油水井防垢增注声波器 An oil by injection wells scale sonic device |
| 08/31/2011 | CN102168539A Automatic mud scrape turntable capable of hanging wiring sleeve |
| 08/31/2011 | CN102167969A Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same. |
| 08/30/2011 | US8006762 System and method of controlling surge during wellbore completion |
| 08/24/2011 | CN201943664U 撬装式电动掺水加药箱 Skid-mounted electric watered plus kits |
| 08/24/2011 | CN201943663U 一种抽油杆防喷刮油器 One kind of sucker rod BOP scraping oil |
| 08/24/2011 | CN102162345A Air relief valve |
| 08/24/2011 | CN101328796B Environment protection type wax-proof anti-scaling viscosity reduction machine |
| 08/23/2011 | US8003581 Iron control agent |
| 08/23/2011 | US8003574 Inhibiting naphthenate solids and emulsions in crude oil |
| 08/23/2011 | US8002038 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 08/23/2011 | US8002037 Downhole cleaning tool and method of use |
| 08/23/2011 | DE202010003119U1 Vorrichtung zum Erzeugen von Hochdruck-Impulsen An apparatus for generating high-pressure pulses |
| 08/18/2011 | US20110198075 In-pipe work device |
| 08/17/2011 | CN201934062U 一种油嘴防蜡装置 One kind of glib Wax device |
| 08/17/2011 | CN102155205A Automatic quantitative dosing device under oil well |
| 08/17/2011 | CN102153997A Hydrogen sulfide treating agent for oil fields and method for treating hydrogen sulfide |
| 08/16/2011 | US7997343 Dynamic scale removal tool and method of removing scale using the tool |
| 08/11/2011 | WO2011095816A2 Improved downhole tool and method |
| 08/10/2011 | CN201924888U 一种电磁清防蜡阻垢仪 An electromagnetic Paraffin scale instrument |
| 08/10/2011 | CN201924846U 钻井用多功能气动卡瓦 Multifunction pneumatic drilling slips |
| 08/10/2011 | CN102146780A Submersible linear motor respirator |
| 08/09/2011 | US7994103 Method for controlled placement of chemicals and composition useful for practicing same |
| 08/09/2011 | US7992636 Device and method for retrieving debris from a well |
| 08/09/2011 | CA2645295C Hydrocarbon recovery techniques |
| 08/04/2011 | US20110186355 Drill string mounted rotatable tool and cleaning method |
| 08/04/2011 | US20110186287 Cleaning Device |
| 08/03/2011 | CN201915906U 热采井光杆刮垢环 Thermal recovery wells bare dirt scraper ring |
| 08/03/2011 | CN201915904U 变频电磁油管电热高效清蜡洗井装置 Frequency Electromagnetic tubing efficient electric wax flushing device |
| 08/03/2011 | CN102140902A Underground explosive loading device and method for estimating flash vaporization depth of geothermal well |
| 08/02/2011 | US7987906 Well bore tool |
| 07/28/2011 | WO2011091165A2 Wellbore filter screen and related methods of use |
| 07/28/2011 | WO2011091157A2 Differential pressure wellbore tool and related methods of use |
| 07/28/2011 | WO2011090481A1 Method and apparatus for making resistivity measurements in a wellbore |
| 07/28/2011 | WO2011088576A1 Wellbore obstruction-clearing tool and method of use |
| 07/28/2011 | CA2787145A1 Wellbore filter screen and related methods of use |
| 07/27/2011 | CN201908626U Gyroscope cable cleaner |
| 07/27/2011 | CN201908625U Electromagnetic wax proofing and viscosity reducing device for oil well |
| 07/27/2011 | CN102134982A Multilayer gravel packing method and tool |
| 07/27/2011 | CN102134981A Paraffin cleaning shuttle |
| 07/26/2011 | US7984761 Openhole perforating |
| 07/21/2011 | WO2011085753A1 Deep-well pump system |
| 07/21/2011 | DE102010010181B3 Vorrichtung und Verfahren zum Erzeugen von Hochdruck-Impulsen Apparatus and method for generating high-pressure pulses |
| 07/20/2011 | EP2345790A2 Downhole chemical injection tool |
| 07/20/2011 | CN201902197U Novel oil well wax-proof device |
| 07/20/2011 | CN101270636B Oil well dirty-blocking device |
| 07/14/2011 | WO2011038107A3 Method and apparatus for injecting fluid in a wellbore |
| 07/14/2011 | WO2011017105A3 Wellbore cleanout tool |
| 07/14/2011 | US20110168404 Downhole tool |
| 07/14/2011 | US20110168397 Apparatus for use in top filling of tubulars and associated methods |
| 07/14/2011 | US20110168383 Cleaning Device |
| 07/13/2011 | EP2343416A1 Borehole pump system |
| 07/13/2011 | CN201896604U Self-operated integrated medicine feeding device |
| 07/13/2011 | CN201896603U Clock program-controlled timed and quantitative chemical feeding device for oil well |
| 07/12/2011 | CA2705597C Methods and compositions for acidization in a wellbore using an ester or polyester of a glycerol |
| 07/12/2011 | CA2494200C Method for controlled placement of oilfield chemicals and composition useful for practicing same |
| 07/07/2011 | WO2011080759A1 Additive and method for removal of impurities formed due to sulfur compounds in crude oils containing calcium naphthenate |
| 07/07/2011 | CA2786077A1 Additive and method for removal of impurities formed due to sulfur compounds in crude oils containing calcium naphthenate |
| 07/06/2011 | EP2340352A1 Work string mounted cleaning tool and assembly method |
| 07/06/2011 | CN201891407U Novel paraffin scraper |
| 07/06/2011 | CN201891406U Intensified magnetic wax control unit |
| 06/30/2011 | WO2011076935A1 Downhole tool for borehole cleaning or for moving fluid in a borehole |
| 06/30/2011 | WO2011043872A3 Multi-point chemical injection system for intelligent completion |
| 06/30/2011 | US20110155393 Generating power in a well |
| 06/30/2011 | CA2785588A1 Downhole tool for borehole cleaning or for moving fluid in a borehole |
| 06/29/2011 | EP2339110A1 Downhole tool for borehole cleaning or for moving fluid in a borehole |
| 06/29/2011 | CN201883980U Anti-object falling mud scraping device |
| 06/29/2011 | CN201883975U Drift size gauge tool for dredging, scraping and flushing well |
| 06/29/2011 | CN201880717U Spherical-pig launching device |
| 06/29/2011 | CN101082001B Aloe derived scale inhibitor |
| 06/28/2011 | US7968500 Gas hydrate protection with heat producing two-component gas hydrate inhibitors |
| 06/23/2011 | US20110146999 Method and Apparatus for Dewatering Using Methane |
| 06/23/2011 | US20110146998 Methods for using or removing unused rock debris from a passageway through subterranean strata using rock breaking apparatus |
| 06/22/2011 | EP2336485A2 Continuous slow dissolving chemical treatment for oil and gas wells |
| 06/22/2011 | EP2334874A2 Device and method for activating or cleaning wells |
| 06/22/2011 | CN201874534U Bidirectional rubber cup type sand filter puller |
| 06/22/2011 | CN201874533U Intelligent electromagnetic paraffin-prevention device in oil field |
| 06/22/2011 | CN201874532U Double-sealing oil drain valve |
| 06/22/2011 | CN201874531U DC (direct current) electric paraffin cleaning hoist |
| 06/22/2011 | CN201874530U Oil well and pipeline ground anti-wax device |
| 06/16/2011 | WO2011035251A3 Open-hole mudcake cleanup |
| 06/16/2011 | US20110139457 System and method for lateral wellbore entry, debris removal, and wellbore cleaning |
| 06/15/2011 | CN201865632U Wax removing and preventing device for oil wells |
| 06/15/2011 | CN201865631U Electric oil tube wax removing device |
| 06/15/2011 | CN201865630U Wax-removing current collector for petroleum pipe column |
| 06/15/2011 | CN201865629U Well control equipment cleaning device |
| 06/15/2011 | CN102094609A Controllable constant-pressure medicament feeding device |
| 06/15/2011 | CN102093868A Novel microbial wax removal and control system and application thereof |
| 06/14/2011 | US7959743 Lithium salts of fatty alcohol sulphates for cleaning boreholes, boring devices and borings |
| 06/14/2011 | US7958939 Composition and method for producing a pumpable hydrocarbon hydrate slurry at high water-cut |
| 06/08/2011 | CN201857938U Oil tube scraper for steel wire operation |
| 06/08/2011 | CN201857906U Nylon paraffin-scraping and centering device of sucker rod |
| 06/07/2011 | US7954553 Use of low impact expansion to reduce flow friction |
| 06/01/2011 | CN201851088U Annular pressure manual chemical agent adding device for oil well |
| 06/01/2011 | CN201851087U Long-effect scale inhibition device |
| 06/01/2011 | CN201851086U Frequency conversion paraffin cleaning hoist |
| 06/01/2011 | CN201851085U Hollowing and anti-scaling device of pipeline |