| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 09/04/2008 | US20080210428 Method of removing filter cake |
| 09/03/2008 | CN201110167Y Sand-prevention overload-prevention glue-valve-abscission-prevention barrel oil pump capable of shaving residual oil of casing tube |
| 09/03/2008 | CN201110166Y Conversion device for oil tube inner lower hollow stem well-washing |
| 09/02/2008 | US7419937 Antiscaling agent for well bores; sustained release |
| 08/28/2008 | WO2007134297A3 Wellbore cleaning tool system and method of use |
| 08/28/2008 | US20080202756 Magnetic Assemblies for Deposit Prevention |
| 08/28/2008 | CA2579970A1 Method of using and transporting a non-emulsified organic peroxide-containing composition |
| 08/27/2008 | CN101251002A Device for continuously adding medicine into oil well down-hole liquid |
| 08/27/2008 | CN101250997A Anti-stop pullker |
| 08/27/2008 | CN101250994A Oil well sand-pumping system as well as sand-pumping method thereof |
| 08/27/2008 | CN101250993A Horizontal oil well sand-pumping device as well as sand-pumping method thereof |
| 08/27/2008 | CN101250992A Oil well sand-pumping device as well as sand-pumping method thereof |
| 08/27/2008 | CN101250991A Oil well horizontal sand-pumping device as well as sand-pumping method thereof |
| 08/27/2008 | CN101250990A Oil well horizontal sand-pumping device as well as sand-pumping method thereof |
| 08/21/2008 | US20080196881 Wellbore Cleaning Tool and Method |
| 08/20/2008 | CN201103382Y Oil tube cleaner of water injection well |
| 08/20/2008 | CN201103381Y Electrically heated wax clearing and preventing device for non-lever oil production well |
| 08/20/2008 | CN201103380Y Multifunctional self-washing car for oil-pumping well |
| 08/19/2008 | US7413023 Wellhead seal unit |
| 08/13/2008 | CN201100117Y Self well washing device |
| 08/13/2008 | CA2620788A1 Fracture clean up method |
| 08/07/2008 | US20080185150 Apparatus and Method for Cleaning a Well |
| 08/05/2008 | CA2394028C Process for treating an oil well |
| 07/30/2008 | EP1532346B1 Method for controlled placement of oilfield chemicals and composition useful for practicing same |
| 07/30/2008 | CN101233294A System for cyclic injection and production from a well |
| 07/29/2008 | US7404436 Downhole tool |
| 07/29/2008 | US7404416 Apparatus and method for creating pulsating fluid flow, and method of manufacture for the apparatus |
| 07/29/2008 | CA2307689C Two-component oil well swab |
| 07/29/2008 | CA2293686C Control and monitoring system for chemical treatment of an oilfield well |
| 07/24/2008 | WO2008037069B1 Placement of fluids in ground by pulse-injection |
| 07/24/2008 | WO2008024035A3 Device for acoustic action on paraffin deposits in oil-well tubing (owt) in oil wells |
| 07/23/2008 | CN201090182Y Apparatus for filling movable agentia |
| 07/23/2008 | CN201090181Y Device for washing well internal wall |
| 07/17/2008 | WO2008008697A3 Compositions, methods and uses for sterically-hindered quaternary ammonium compounds |
| 07/16/2008 | EP1438481B8 Treating composition |
| 07/16/2008 | CN201087729Y Novel high-efficiency energy-saving oil-field flooding well washing vehicle |
| 07/16/2008 | CN201087697Y Drilling rod mud scraping device |
| 07/16/2008 | CN101220807A Lever oil pump capable of eliminating eccentric wear and directly flushing well |
| 07/15/2008 | US7398824 Method for inhibiting or controlling inorganic scale formations with copolymers of acrylamide and quaternary ammonium salts |
| 07/09/2008 | CN201083114Y Electric heating device for cleaning and resisting wax of oil well |
| 07/09/2008 | CN201083113Y Oil pipe and oil pumping rod automatic washing device |
| 07/08/2008 | US7396216 Submersible pump assembly for removing a production inhibiting fluid from a well and method for use of same |
| 07/03/2008 | US20080161222 Use of Polyaminomethylenephosphonates as Dispersing Agents |
| 07/01/2008 | US7392846 Reducing the adhesiveness of tar in a well bore by introducing a silicate tar-treating and allowing it to react with the tar; may be used in drilling fluids; sodium silicate or potassium silicate |
| 07/01/2008 | US7392845 Method of treating oil or gas well with biodegradable emulsion |
| 07/01/2008 | US7392844 Method of treating an oil or gas well with biodegradable low toxicity fluid system |
| 06/26/2008 | WO2008076952A2 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 06/25/2008 | CN201078218Y Explosion-proof heater of far-infrared well head |
| 06/25/2008 | CN101205804A Magnetic-heat wax preventing device for oil production |
| 06/25/2008 | CN101205803A Well washing apparatus |
| 06/24/2008 | US7389787 Closed loop additive injection and monitoring system for oilfield operations |
| 06/19/2008 | US20080145139 Clamp |
| 06/19/2008 | US20080142226 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 06/19/2008 | US20080142224 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 06/19/2008 | CA2672627A1 Improved downhole scraping and/or brushing tool and related methods |
| 06/18/2008 | CN201074504Y Device for hot washing and cleaning wax of hollow sucker rod |
| 06/17/2008 | CA2490346C Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well |
| 06/17/2008 | CA2315374C A method of improving the flow properties of a crude oil or natural gas liquid |
| 06/12/2008 | US20080135232 Subsea Conduit Cleaning Tool |
| 06/12/2008 | CA2610894A1 Fluid loss control and well cleanup methods |
| 06/11/2008 | CN101196104A Rotation preventing electric dirty shaving device for down-hole oil tube |
| 06/10/2008 | US7383881 Stabiliser, jetting and circulating tool |
| 06/10/2008 | CA2461297C Viscous well treating fluids and methods |
| 06/05/2008 | WO2006093863A3 Method and composition for forming protective precipitate on cement surfaces |
| 06/05/2008 | US20080128136 Well maintenance equipment and procedure |
| 06/04/2008 | CN201068783Y Thermal washing wax-clearing anti-pollution apparatus |
| 06/04/2008 | CN201068775Y Anti-pollution thermal washing anchoring and sealing device |
| 06/03/2008 | US7380606 Composition and process for well cleaning |
| 06/03/2008 | CA2498437C Method for increasing the reaction efficiency of acetic and/or formic acid |
| 05/28/2008 | CN201065751Y Movable board type water injection filter |
| 05/27/2008 | US7377283 Coiled tubing wellbore cleanout |
| 05/21/2008 | CN201062509Y Pumping rod righting paraffin scraper |
| 05/21/2008 | CN101183253A Paraffin removing vehicle automatic control method |
| 05/15/2008 | US20080110621 Managing lost returns in a wellbore |
| 05/15/2008 | US20080110618 In Situ Fluid Formation for Cleaning Oil- or Synthetic-Oil-Based Mud |
| 05/14/2008 | EP1766184B1 Use of lithium salts of fatty alcohol sulphates for cleaning boreholes, boring devices and borings |
| 05/14/2008 | EP1497526B1 Bi-directional thruster pig apparatus and method of utilizing same |
| 05/14/2008 | CN201059180Y Antifouling diverting protector |
| 05/14/2008 | CN201059179Y Oil pipe sand cleaning paraffin scraper |
| 05/08/2008 | CA2667005A1 Process for the enzymatic removal of filter-cakes produced by water-based drilling and completion fluids |
| 05/07/2008 | EP1918507A1 Shaped charge comprising an acid |
| 05/07/2008 | EP1272734B1 New and improved method and apparatus for cleaning wellbore casing |
| 05/07/2008 | EP1208285B1 Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members |
| 05/07/2008 | CN201057024Y Safe paraffin removal bracket |
| 05/07/2008 | CN201057023Y Electrical heating well washing vehicle |
| 05/06/2008 | CA2460219C Packer with integral cleaning device |
| 05/01/2008 | US20080099241 Characterizing a reservoir in connection with drilling operations |
| 05/01/2008 | US20080099199 Automatic chemical treatment system with integral flush fluid dispenser |
| 05/01/2008 | US20080099196 Casing make-up and running tool adapted for fluid and cement control |
| 04/30/2008 | CN201053312Y Environment-friendly type wax-proof anti-scaling viscosity reduction equipment |
| 04/30/2008 | CN101169032A Drilling well drilling bar inner sludge scraper |
| 04/30/2008 | CN101169030A Method for preparing magnetic scale-inhibiting wax-proof antisepsis oil pipe used for oil field |
| 04/29/2008 | CA2486091C Controlling a pressure transient in a well |
| 04/29/2008 | CA2474991C Oil well servicing vehicle |
| 04/29/2008 | CA2339715C Side entry sub |
| 04/24/2008 | WO2008048817A2 Engine/steam generator with afterburner |
| 04/24/2008 | WO2008047107A1 Cement evaluation method and tool |
| 04/24/2008 | US20080097735 System for predicting changes in a drilling event during wellbore drilling prior to the occurrence of the event |
| 04/23/2008 | EP1913233A1 System for cyclic injection and production from a well |
| 04/23/2008 | EP1639228B1 Method for stimulating an oilfield comprising using different scale-inhibitors |