| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 04/23/2008 | CN201050343Y Automatic extraction device for paraffin removal |
| 04/23/2008 | CN101165312A Oil well long-lasting wax-preventing method |
| 04/22/2008 | US7360998 Method of cleaning out blockages which prevent operation of a reciprocating downhole tubing pump |
| 04/22/2008 | US7360596 Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells |
| 04/22/2008 | CA2524666C Wellbores utilizing fiber optic-based sensors and operating devices |
| 04/22/2008 | CA2447308C Method and apparatus for cleaning a fractured interval between two packers |
| 04/17/2008 | WO2008045734A2 In situ fluid formation for cleaning oil-or synthetic-oil-based mud |
| 04/17/2008 | US20080087438 Self-propelled swabbing device and method |
| 04/17/2008 | US20080087434 Engine/steam generator with afterburner |
| 04/17/2008 | US20080087433 Screen apparatus and method |
| 04/16/2008 | EP1911927A2 Method and apparatus for displacing drilling fluids with completion and workover fluids |
| 04/16/2008 | CN101161984A Trace heating for oil well viscosity,coagulation reduction and dewaxing |
| 04/10/2008 | WO2008017019A3 Annular flow shifting device |
| 04/09/2008 | EP1907705A1 Device and method for cleaning a compressor |
| 04/08/2008 | US7353873 Magnetic assemblies for deposit prevention and methods of use |
| 04/03/2008 | WO2008037069A1 Placement of fluids in ground by pulse-injection |
| 04/03/2008 | CA2663703A1 Placement of fluids in ground by pulse-injection |
| 04/02/2008 | CN201043127Y Process control device for paraffin removal from oil well or swab of swab vehicle |
| 04/02/2008 | CN100378435C Electronic measuring device |
| 04/02/2008 | CN100378189C Self-destructing filter cake |
| 04/01/2008 | CA2437730C Method of diminishing the size of the cross section of an opening of a hollow device located in a flow pipe |
| 03/27/2008 | US20080073072 Dual point adjustable depth air sparging well system |
| 03/25/2008 | CA2390647C Method and composition for the triggered release of polymer-degrading agents for oil field use |
| 03/20/2008 | WO2008032067A1 Methods and compositions for thermally treating a conduit used for hydrocarbon production or transmission to help remove paraffin wax buildup |
| 03/20/2008 | US20080066920 Providing a cleaning tool having a coiled tubing and an electrical pump assembly for cleaning a well |
| 03/20/2008 | CA2628645A1 Methods and compositions for thermally treating a conduit used for hydrocarbon production or transmission to help remove paraffin wax buildup |
| 03/19/2008 | EP1900902A1 Improved internal breaker |
| 03/18/2008 | US7343978 Scale dissolver fluid |
| 03/13/2008 | US20080060816 Wellhead seal unit |
| 03/13/2008 | US20080060815 Wellhead seal unit |
| 03/13/2008 | CA2663456A1 Method for controlled placement of additives in oil and gas production |
| 03/11/2008 | CA2231734C Improved oil-based drilling fluid |
| 03/06/2008 | WO2008010923A3 Method for removing asphaltene deposits |
| 03/06/2008 | US20080053651 Wellbore cleanup tool |
| 03/05/2008 | EP1895092A1 Pulse generator |
| 03/05/2008 | CN201031678Y Oil well automatically power feeding device |
| 03/05/2008 | CN201031665Y High-pressure well head unpowered power feeding device |
| 03/04/2008 | US7337845 Well maintenance equipment and procedure |
| 03/04/2008 | US7337660 Method and system for reservoir characterization in connection with drilling operations |
| 02/28/2008 | WO2008024547A2 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal |
| 02/28/2008 | US20080047712 Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells |
| 02/27/2008 | CN201027531Y Adjustable shaft mouth sucker rod paraffin scraper |
| 02/27/2008 | CN101133135A 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 co |
| 02/27/2008 | CN101131073A Paraffin removal and control method for oil well |
| 02/20/2008 | CN201024998Y Automatic drug addition device |
| 02/20/2008 | CN201024997Y A surrounding drug addition device for under-well eccentric and dragging bushing |
| 02/20/2008 | CN201024996Y Slave tube thermal washing bender for dense oil horizontal well |
| 02/20/2008 | CN201024995Y High voltage quick thorn washing oil tube device |
| 02/20/2008 | CN201024920Y Wax cleaning, friction deviation preventive and antiseptic tool |
| 02/20/2008 | CN101126307A Wax-proof anti-scaling equipment and mating oil pipe short section |
| 02/19/2008 | CA2479294C Method for operating a well jet device during cleaning of the downhole area of a formation and device for carrying out said method |
| 02/19/2008 | CA2446525C Method for treating a subterranean formation |
| 02/14/2008 | WO2008017849A1 Treating liquids in oil extraction |
| 02/14/2008 | CA2663963A1 Treating liquids in oil extraction |
| 02/13/2008 | CN201021616Y Online wax device for petroleum single well pipe |
| 02/13/2008 | CN101124384A Additives for hydrate inhibition in fluids gelled with viscoelastic surfactants |
| 02/13/2008 | CN101122219A Well-repairing process for casing deformed oil and water well |
| 02/13/2008 | CN101122218A Drift sand well harnessing process |
| 02/12/2008 | US7328746 Method and composition for forming protective precipitate on cement surfaces prior to formation acidizing treatment |
| 02/07/2008 | WO2008016965A1 Cleaning apparatus and method |
| 02/07/2008 | WO2008016961A1 Drilling method and downhole cleaning tool |
| 02/07/2008 | WO2008014559A1 Well cleaning apparatus |
| 02/07/2008 | US20080029268 Flow Diverter |
| 02/07/2008 | CA2659430A1 Well cleaning apparatus |
| 02/06/2008 | CN101120155A Integrated magnetic ranging tool |
| 02/06/2008 | CN101120153A Method and system for cleaning a well bore |
| 01/31/2008 | US20080023203 Apparatus and method for delivering chemicals into an underground well |
| 01/31/2008 | US20080023202 Method for removing oilfield mineral scale from pipes and tubing |
| 01/31/2008 | US20080023199 Cement Compositions Comprising Environmentally Compatible Defoaming Agents and Methods of Use |
| 01/30/2008 | EP1882080A1 Wellbore cleaning tool and method |
| 01/30/2008 | CN201013336Y Non-powered mine mouth dosing device |
| 01/30/2008 | CN201013311Y Oil field hot-washing paraffin removal device |
| 01/30/2008 | CN101113664A Oil passageway cleaning telescopic roll doctor and working method |
| 01/29/2008 | US7322408 Downhole tool with actuable barrier |
| 01/24/2008 | WO2008011280A1 Flow diverter tool assembly and methods of using same |
| 01/24/2008 | CA2658189A1 Method for removing asphaltene deposits |
| 01/23/2008 | EP1880075A2 Flow through subassembly for a downhole drill string and method for making same |
| 01/23/2008 | CN101109179A Gas lifting reverse circulation porus cleaning construction method for slurry bulkhead cast-in-situ bored pile |
| 01/22/2008 | US7321293 Integrated magnetic ranging tool |
| 01/17/2008 | US20080011480 Downhole surge pressure reduction and filtering apparatus |
| 01/16/2008 | CN201007197Y Vehicle mounted type oilfield superconducting automatically heat washing wax device |
| 01/16/2008 | CN101105118A Solid anti-scaling agent and preparation process thereof |
| 01/15/2008 | US7318477 Method and composition for cleaning a well bore prior to cementing |
| 01/15/2008 | US7318476 Automatic chemical treatment system with integral flush fluid dispenser |
| 01/15/2008 | US7318471 System and method for monitoring and removing blockage in a downhole oil and gas recovery operation |
| 01/15/2008 | CA2393302C Method for cleaning a gas well |
| 01/10/2008 | US20080006408 Contacting an emulsion of water, detergent, hydrocarbon solvent and acid with the interior of the oil well; one-step cleaning |
| 01/09/2008 | CN101100933A Centering paraffin scraper for sucker rod |
| 01/08/2008 | CA2503057C Multi-function well servicing vehicle |
| 01/08/2008 | CA2405970C Expandable bit |
| 01/03/2008 | US20080000636 Method of repairing failed gravel packs |
| 01/02/2008 | CN200999717Y Oil-well pump downhole operation auxiliary device |
| 01/02/2008 | CN200999605Y Oil well well-washing apparatus |
| 01/02/2008 | CN200999600Y Sucker rod wax scraping blow-out preventer |
| 01/01/2008 | US7314083 Slow rotation fluid jetting tool for cleaning a well bore |
| 12/26/2007 | CN200996284Y Spiral impelling solid chemical feeder at wellhead |
| 12/26/2007 | CN200996283Y Scale scraper of multifunctional well gauge |
| 12/26/2007 | CN200996279Y Washing well packer |
| 12/26/2007 | CN101094968A Magnetic assemblies for deposit prevention |
| 12/25/2007 | US7311158 Silicate-containing additives for well bore treatments and associated methods |