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)
11/2003
11/04/2003US6640897 Method and apparatus for through tubing gravel packing, cleaning and lifting
10/2003
10/30/2003US20030200995 Cleaning bore hole using high energy, low energy jets
10/29/2003EP1357403A2 A method of generating electric power in a wellbore
10/29/2003EP1357402A2 A light actuated system for use in a wellbore
10/29/2003EP1357401A2 A system for controlling a downhole device in a wellbore
10/23/2003WO2003087533A1 Apparatus and method for treating the borehole wall and expanding a screen
10/23/2003WO2003087526A1 Stabiliser, jetting and circulating tool
10/23/2003WO2003046333A3 Thermoacoustic electric power generation
10/23/2003WO2000062074A8 Use of 13c-nmr to detect binding
10/23/2003US20030198562 Submersible pump assembly for removing a production inhibiting fluid from a well and method for use of same
10/23/2003US20030196816 Method for reduction of scale during oil and gas production and apparatus for practicing same
10/22/2003EP1355170A2 A method of controlling production from a wellbore
10/22/2003EP1355169A2 Method and apparatus for controlling chemical injection of a surface treatment system
10/22/2003EP1355168A2 A method for avoiding injection induced unintentional fracture growth
10/22/2003EP1355167A2 An injection well with a fibre optic cable to measure fluorescence of bacteria present
10/22/2003EP1355166A2 An injection evaluation system
10/22/2003CN2581687Y Sleeve scale remover
10/16/2003WO2003085604A1 Servicing system for wells
10/15/2003CN2580105Y Screw fixing type oil pump rod centralizer paraffin scraper
10/15/2003CN2580091Y Anti-dropout centralizer
10/15/2003CN1448612A Gasified reactive water-cleaning well squeeze-adding expand-proof agent test charging process
10/14/2003US6633236 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
10/09/2003WO2003083253A1 Junk removal tool
10/09/2003US20030188874 Treating apparatus and method for expandable screen system
10/08/2003CN2578519Y Assembled wax remover
10/08/2003CN2578510Y Sucker rods
10/07/2003US6630428 Blend of fatty acid alkyl esters and lower alkyl glycol ethers; high flash point, low vapor pressure; environmentally safe
10/02/2003US20030183382 Servicing system for wells
10/01/2003CN1122750C Method for washing well by screw pump with hollow rotor
09/2003
09/16/2003CA2137007C Method for removing alkaline sulfate scale
09/10/2003EP1341988A1 Bi-directional traction apparatus
09/10/2003CN2571990Y Two-piece type stabilizer for sucker rod
09/09/2003US6616716 Method of improving the flow properties of a crude oil or natural gas liquid
09/09/2003US6615917 Computer controlled injection wells
09/04/2003US20030164240 Controllable gas-lift well and valve
09/03/2003EP1339937A2 Improved method for stimulation of liquid flow in a well
09/03/2003CN2570450Y High power piston for oil-field water well washing
09/03/2003CN2570438Y Multiple function pumping rod
09/02/2003US6613899 Method for preventing deposits in oil extraction
09/02/2003US6613154 Well cleaning apparatus and method for its use
08/2003
08/28/2003WO2003071245A2 Pressure reading tool
08/27/2003CN2568801Y Short section wax scraping centering guide of self rotating sucker rod
08/27/2003CN1119500C Method for preventing deposits in oil extraction
08/26/2003US6611763 Method of early predicting paraffin deposition risks during production and transport
08/26/2003US6609668 Cavitation and cleaning tool
08/21/2003WO2003069112A1 Wellhead seal unit
08/21/2003US20030155153 Pressure reading tool
08/21/2003US20030155123 Method of treating reservoir zone of hydrocarbon producing well to inhibit water production problerms
08/21/2003US20030155113 Production tool
08/20/2003EP0853651B1 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use
08/19/2003US6607607 Coiled tubing wellbore cleanout
08/19/2003US6607031 Screened boot basket/filter
08/14/2003WO2003067016A2 Bi-directional thruster pig apparatus and method of utilizing same
08/13/2003CN2565977Y Tubular high magnetic field paraffin control device
08/07/2003US20030145991 Subsea production system
08/07/2003US20030145990 Rotary pump for well
08/06/2003CN2564743Y Hot washing reservoir non-pressing device
07/2003
07/30/2003EP0910725B1 Wellbores utilizing fiber optic-based sensors and operating devices
07/30/2003CN2563301Y Well flushing device for oil well conventional well-flushing
07/30/2003CN2563300Y Controllable well head chemial adder
07/30/2003CN1116495C Apparatus for perforating and stimulating subterranean formation
07/29/2003US6598682 Reservoir communication with a wellbore
07/29/2003CA2255536C Method and apparatus for treating long formation intervals
07/23/2003CN2561924Y Magnetic chemical composite dewaxing device
07/23/2003CN2561923Y Fixed point multi-stage hydraulic oscillating block eliminator
07/22/2003US6596911 Composition and method for inhibition of formation of gas hydrates
07/17/2003US20030131990 Wellbores utilizing fiber optic-based sensors and operating devices
07/16/2003EP1327053A2 Method and pumping out means for improving the supply of water to a source or a water procurement well
07/16/2003CN2560750Y Road-type solid anti-wax and pour depressing device for oil well
07/16/2003CN1429963A Water injection well nitric acid powder-acid liquid system and acidification process
07/15/2003US6593279 Anionic surfactant, a nonionic surfactant, a co- solvent, a solvent and an oxidizer; cleaning oil sludges and drilling mud residues from well cuttings, well formations and down hole and surface oil well drilling and production equipment.
07/10/2003US20030127228 Well treatment tool and method of treating a well
07/09/2003EP1226335B1 Asphaltenes monitoring and control system
07/09/2003CN2559785Y Electric heating cleaning well apparatus
07/09/2003CN1428498A Automatic screen-cleaning bottomhole sand-preventing machine driven by reservoir pressure
07/08/2003US6588266 Monitoring of downhole parameters and tools utilizing fiber optics
07/02/2003CN2558762Y Dropout- and blowout-preventing testing discharge swab for oil well
07/02/2003CN2558761Y Eccentric self-adjusting wellhead pumping rod wax scraper
07/02/2003CN2558760Y Improved automatic wax removal device for pumping well
06/2003
06/25/2003EP0819207B1 Method for improved water well production
06/25/2003CN2557692Y Descaling robot for oil well
06/19/2003US20030111226 Combination surge/pressure wash tool for oil wells and method therefor
06/12/2003US20030106694 Method for disposal of liquid from gas wells
06/11/2003CA2372987A1 Method of disposal of liquid from gas wells
06/10/2003US6575239 Well cleaning tool
06/05/2003WO2003046333A2 Thermoacoustic electric power generation
06/05/2003US20030102163 Method for determining sweep efficiency for removing cuttings from a borehole
06/03/2003US6571869 Downhole surge pressure reduction and filtering apparatus
05/2003
05/30/2003WO2003044317A1 Method of drilling a borehole into an earth formation
05/29/2003US20030098159 Method and apparatus for unloading well tubing
05/28/2003CN2553107Y Beam-pumping unit power-aid wellhead chemicals-feeder
05/27/2003US6568472 Method and apparatus for washing a borehole ahead of screen expansion
05/21/2003EP1311336A2 Non-cryogenic production of nitrogen for on-site injection in well clean out
05/21/2003EP1171685A4 Method and apparatus for reducing fouling of injection and recovery wells
05/21/2003EP1093541B1 Method for preventing deposits in oil extraction
05/16/2003CA2363183A1 Production tool
05/15/2003US20030089505 Downhole surge pressure reduction and filtering apparatus
05/15/2003US20030089498 Controlling transient underbalance in a wellbore
05/13/2003US6561280 Method of injecting tubing down pipelines
05/13/2003US6561274 Combustible fuel cell can be placed in the tubular member below the fluid and ignited to generate gas
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