Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 37 - Methods or apparatus for cleaning boreholes or wells
Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
09/2012
09/27/2012US20120241145 Downhole scraping and/or brushing tool and related methods
09/26/2012EP2501898A2 Heat generation process for treating oilfield deposits
09/26/2012CN202451115U Chemical injection sledge for ocean platform
09/26/2012CN202451114U High-frequency electromagnetic heating and cleaning device
09/26/2012CN202451113U Thermally-cleaning, wax-removing and oil layer pollution-preventing oil pumping pipe column
09/26/2012CN202451110U Wellhead one-way valve
09/25/2012US8272442 In situ extraction of hydrocarbons from hydrocarbon-containing materials
09/25/2012CA2685607C Methods for stimulating oil or gas production
09/25/2012CA2657245C Compositions, methods and uses for sterically hindered quaternary ammonium compounds
09/20/2012WO2012125660A2 Dual wiper plug system
09/20/2012US20120234548 Oil well cleaning compositions
09/19/2012CN202441334U Oil well measuring dosing device
09/19/2012CN202441333U Pumping well oil tube paraffin knife
09/19/2012CN202441332U Cleaning device of oil rod and oil tube in well casing
09/19/2012CN202441331U Paraffin removal device for oil well
09/18/2012US8267176 Formation conditioning fluids comprising peroxides and methods relating thereto
09/12/2012CN102667051A Downhole tool for borehole cleaning or for moving fluid in a borehole
09/12/2012CN102661137A Constant-current constant-temperature self-injection oil well chemical dosing device
09/12/2012CN102661131A Self-compensating uniform large-deformation oil extracting and dragging-for pump
09/07/2012WO2012096945A3 Method for cleaning drill cuttings
09/07/2012WO2012082466A3 Debris collection device with enhanced circulation feature
09/05/2012CN202417438U Novel oil well medicine feeding device
09/05/2012CN202417437U Scale-borer for oilfield well logging
09/05/2012CN101737019B Release packer capable of well-flushing
08/2012
08/30/2012CA2825340A1 Method of introducing treatment agents into a well or flow conduit
08/29/2012CN202402009U Hydraulic scraper
08/29/2012CN202402008U Fuel processing system and natural gas well washing paraffin removal equipment
08/28/2012US8251144 Flow diverter
08/23/2012US20120211229 Cable deployed downhole tubular cleanout system
08/22/2012CN202391393U Novel bailing type barrel oil pump
08/22/2012CN202391387U Spiral edge scale scraper for inner wall of oil pipe
08/22/2012CN202391386U Combination clearing device for seriously-formed scale of oil-water well drivepipe
08/22/2012CN102644449A Cable type downhole descaling device
08/22/2012CN102643635A Stratum water-injection augmented injection agent of oil field
08/22/2012CN101628546B Pressure reducing system for fuel gas and natural gas dewaxing vehicle
08/21/2012US8245775 Wellbore consolidating tool for rotary drilling application
08/21/2012CA2676517C Method of treating flow conduits and vessels with foamed composition
08/16/2012WO2012066514A4 Artificial system for simultaneous production and maintenance with mechanical pumping with flexible pipe for fluid extraction
08/16/2012WO2012058144A3 Hydrate deposit inhibition with surface-chemical combination
08/16/2012US20120205108 Apparatus and method for abrasive perforating and cleanout using a multi-cycle open/close valve
08/15/2012CN202381044U Downhole injection device of oil-gas field
08/15/2012CN202381043U Downhole injector
08/15/2012CN202381042U Anti-wax viscosity reduction and oil enhancement device with Lorentz magnetic effect
08/15/2012CN202381011U Integrated multipurpose drift size gauge tool
08/15/2012CN102635332A Special cylindrical wax scraper for intelligent intermittently bailing type pumping unit
08/15/2012CN102635331A Mechanical descaling system for geothermal well
08/15/2012CN102635330A Fuel treating system and natural gas well-washing and wax-cleaning equipment
08/14/2012US8240379 Shear-activated viscoelastic surfactant fluid and method
08/14/2012US8240373 Apparatus and method for removing debris from a well
08/14/2012CA2637304C Coiled tubing wellbore cleanout
08/09/2012WO2012105852A1 Tool and method to plug and abandon a well
08/09/2012US20120198637 Downhole brush tool
08/09/2012CA2823816A1 Tool and method to plug and abandon a well
08/08/2012CN202370484U Anti-rotating type electric scale-scraping device for water injection well oil pipe
08/07/2012US8235120 Mesophase fluids with extended chain surfactants for downhole treatments
08/07/2012CA2482362C Service tool with flow diverter and associated method
08/02/2012WO2012102694A1 Wellbore knock-out chamber and related methods of use
08/02/2012US20120193100 Oilfield jetting tool
08/01/2012CN102619489A Quantitative constant-current continuous-feeding anti-scale and anti-separation device for closed wellhead
08/01/2012CN102618235A pH regulation unblocking liquid used for well completion
08/01/2012CN101806203B High-pressure hydraulic rotary plug-removing device
07/2012
07/31/2012CA2560938C Process for treating underground formations
07/26/2012WO2012099668A2 Expanding mill having camming sleeve for extending cutting blade
07/25/2012CN202348235U Energy-saving over-pump thermal recovery system device for thick oil
07/25/2012CN202348232U Steel brush cleaner for underground sleeve
07/25/2012CN202348207U Paraffin scraping blowout preventer for sucker rod
07/25/2012CN202348155U Reusable follow-up wax removal device for oil pumping well tube poles
07/24/2012US8227382 Breaker fluids and methods of using the same
07/24/2012US8225884 Rotor underreamer, section mill, casing cutter, casing scraper and drill string centralizer
07/19/2012WO2012096945A2 Method for cleaning drill cuttings
07/18/2012CN202338286U 固体酸棒投放器 Solid acid stick dispensers
07/18/2012CN202338285U 稠油井空心抽油杆清洗连接器 Heavy oil cleaning hollow rod connector
07/18/2012CN202338284U 带压套管自动加药装置 Pressure sleeve automatic dosing device
07/18/2012CN202338283U 一种稠油生产井用的套管刮削装置 Casing scraper with a heavy oil production wells
07/18/2012CN202338282U 油井环保防漏热洗管柱 Well environmental leakproof hot wash column
07/18/2012CN102587863A Paraffin removal device for oil wells
07/18/2012CN102587862A Method for dredging drill hole for underground coal gasification by using compressed air
07/18/2012CN102585791A Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well
07/17/2012US8220548 Surfactant wash treatment fluids and associated methods
07/17/2012US8220532 Magnet fixing device in a cleaning tool
07/11/2012CN202325416U 油井清蜡控制装置 Paraffin oil control device
07/11/2012CN202325415U 降噪放压加药装置 Noise put pressure dosing device
07/11/2012CN202325414U 一种油水管柱内清垢封堵器 Within a water column clean dirt occluder
07/11/2012CN202325413U 多功能油田洗井车 Multifunctional oil washing cars
07/11/2012CN202325412U 双管循环捞砂 Dual circulation bailing
07/11/2012CN202325339U 调幅震荡防蜡降粘增油装置 AM shocks increase viscosity paraffin oil installations
07/11/2012CN202325323U 冲砂、刮蜡、封隔一体式井下作业工具 Sand washing, scraping wax, packers integrated Downhole Tools
07/11/2012CN102561978A Long-stroke no-killing well working device of oil-water well
07/11/2012CN102559163A Chlorine dioxide compound blockage remover, as well as preparation method and use method for same
07/11/2012CN101469605B Multi-magnetic field constant temperature energy-saving electromagnetic de-waxing apparatus for oilfield
07/10/2012CA2660097C Well treatment composition for increasing lifetime of scale inhibiting treatments
07/10/2012CA2606541C Degradable gels in zonal isolation applications
07/05/2012WO2012091986A2 Process for the preparation of conformable materials for downhole screens
07/04/2012CN202300325U 一种渐开线自封刮油器 One kind of self-styled involute scraping oil
07/04/2012CN202300324U 一种套管刮垢器 One kind of scraping dirt filter casing
07/04/2012CN202300323U 配套油嘴清蜡装置 Wax devices supporting glib
07/04/2012CN202300322U 利用油井自身液量循环加热的超导清蜡装置 Well superconducting device itself wax heated circulating fluid volume
07/04/2012CN202300321U 水平井捞砂装置 Horizontal wells bailing device
07/04/2012CN202300320U 封闭式热辐射油管隔热管清洗装置 Enclosed heat radiation pipe insulation tube cleaning device
07/04/2012CN1690357B Openhole perforating device
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