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