| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 03/23/2005 | CN1598240A Enviromental protection wax recoverying vehicle for oil field |
| 03/22/2005 | US6868904 Well development tool and method for use thereof |
| 03/22/2005 | US6868903 Production tool |
| 03/19/2005 | CA2654524A1 Improving reservoir communication by creating a local underbalance and using treatment fluid |
| 03/19/2005 | CA2654384A1 Improving reservoir communication by creating a local underbalance and using treatment fluid |
| 03/17/2005 | WO2005023959A2 Oil-based drilling fluid comprising a non-polluting emulsifying system which can be used for any base oil and which is stable in respect of gas hydrates formation |
| 03/17/2005 | US20050056423 Methods of removing filter cake from well producing zones |
| 03/16/2005 | CN2685556Y Gas-drive filling chemical agent device |
| 03/16/2005 | CN2685555Y Mechanical-drive filling chemical agent device |
| 03/16/2005 | CN2685543Y Cement paste vortex generator |
| 03/16/2005 | CN1594826A Formation contaminant proof air sac packer |
| 03/15/2005 | CA2245886C A process and a formulation to inhibit scale in oil field production |
| 03/10/2005 | US20050051335 Method and apparatus for well bore cleaning |
| 03/10/2005 | US20050051331 Reducing number and prevent migration of particles; preflushing with aqueous solution containing surfactant; noncatalytic reaction |
| 03/10/2005 | CA2535834A1 Drag reducing agents for multiphase flow |
| 03/09/2005 | EP1268975B1 Sand removal and device retrieval tool |
| 03/09/2005 | EP1242556A4 Acid based micro-emulsions |
| 03/09/2005 | CN2683842Y Scraping-washing pipe go-devil |
| 03/09/2005 | CN2683841Y One trip pumping rod automatic flushing device |
| 03/09/2005 | CN1592816A Thermoacoustic electric power generator |
| 03/08/2005 | CA2353900C Closed loop chemical injection and monitoring system for oilfield operations |
| 03/03/2005 | WO2004025067A8 Reducing paraffin, asphaltene, and hydrate accumulations in wells |
| 03/03/2005 | US20050045336 Propellant treatment and continuous foam removal of well debris |
| 03/03/2005 | US20050045334 Propellant treatment and continuous foam removal of well debris |
| 03/02/2005 | EP1510650A2 Downhole surge pressure reduction and filtering apparatus |
| 03/02/2005 | EP1264073B1 Downhole surge pressure reduction and filtering apparatus |
| 03/02/2005 | CN2682192Y Well washing device |
| 02/24/2005 | WO2003098104A3 Stimulation and injection system |
| 02/24/2005 | US20050039906 Flameless hot oiler |
| 02/23/2005 | EP1508667A2 Sand removal and device retrieval tool |
| 02/23/2005 | EP1272734A4 New and improved method and apparatus for cleaning wellbore casing |
| 02/10/2005 | US20050028983 Vibrating system and method for use in scale removal and formation stimulation in oil and gas recovery operations |
| 02/09/2005 | CN2677613Y Scaler for internal wall of eccentric testing working cylinder |
| 02/09/2005 | CN2677593Y Casing scraping sand washer |
| 02/08/2005 | US6851472 Convertible tubular scraper |
| 02/08/2005 | US6851444 Closed loop additive injection and monitoring system for oilfield operations |
| 02/08/2005 | CA2384475C Screened boot basket/filter |
| 02/08/2005 | CA2206497C Drill pipe wiper assembly |
| 02/03/2005 | US20050022995 Apparatus and methods of cleaning and refinishing tubulars |
| 02/03/2005 | US20050022994 Well chemical treatment utilizing plunger lift delivery system |
| 01/30/2005 | CA2473017A1 Well chemical treatment utilizing plunger lift deliver system |
| 01/27/2005 | WO2005007980A1 Well, and method for regenerating a well |
| 01/27/2005 | WO2004020775A3 Method and apparatus for removing cuttings |
| 01/27/2005 | US20050016772 Method of drilling a borehole into an earth formation |
| 01/27/2005 | US20050016731 Subterranean sandstone formation; oil and gas wells; flushing using hydrofluoric acid |
| 01/27/2005 | US20050016302 Traction apparatus |
| 01/26/2005 | CN1186518C Sealed oil well as oil reservoir |
| 01/22/2005 | CA2474321A1 Acidizing stimulation method using a ph buffered acid solution |
| 01/20/2005 | WO2004092633A3 Spoolable composite coiled tubing connector |
| 01/20/2005 | US20050012036 Providing a light cell in a wellbore |
| 01/19/2005 | EP1497526A2 Bi-directional thruster pig apparatus and method of utilizing same |
| 01/18/2005 | US6843316 Method for improving well quality |
| 01/12/2005 | CN2670592Y Self released connector for clean hole valve |
| 01/11/2005 | US6840337 Method and apparatus for removing cuttings |
| 01/11/2005 | US6840315 Device for cleaning an inner pipe inserted into a gas or oil producing well |
| 01/06/2005 | US20050003968 Drilling fluids |
| 01/05/2005 | CN1560175A Clear type high-efficient paraffin removal agent |
| 12/30/2004 | US20040263350 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |
| 12/29/2004 | WO2004113669A1 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas |
| 12/29/2004 | CN2667150Y Multiphase flow rotary wing mixer |
| 12/29/2004 | CN2667149Y Pipe type high magnetic field oil well salt preventing device |
| 12/29/2004 | CN1182319C Apparatus and method for removing wax from internal surface of oil delivering pipe by high-pressure steam |
| 12/23/2004 | WO2004111386A1 Method and system for recirculating fluid in a well system |
| 12/23/2004 | US20040256104 Removing any scale or deposits in gas wells, by injecting a liquid carbon dioxide at a pressure below the formation fracturing pressure, depressurization to vaporize carbon dioxide, and blow out any dissolved scale materials |
| 12/23/2004 | US20040256100 Method and apparatus of providing an optical fiber along a power supply line |
| 12/21/2004 | US6832655 Method for cleaning gravel packs |
| 12/16/2004 | US20040251023 Downhole surge pressure reduction and filtering apparatus |
| 12/15/2004 | CN2663650Y Paraffin cutting cleaner for pumping well |
| 12/09/2004 | US20040246468 Electronic surveying apparatus |
| 12/09/2004 | US20040244974 Method and system for recirculating fluid in a well system |
| 12/08/2004 | CN2661914Y Integrative tool for drifting and tube scraping |
| 12/08/2004 | CN1553985A Method of controlling asphaltene precipitation in a fluid |
| 12/07/2004 | US6828547 Wellbores utilizing fiber optic-based sensors and operating devices |
| 12/02/2004 | WO2004104367A1 Sludge control in crude oil |
| 12/02/2004 | US20040238220 Apparatus and method for cleaning and sealing a well borehole portion for formation evaluation |
| 12/02/2004 | US20040238174 Down hole well cleaning apparatus |
| 12/01/2004 | CN2660112Y Anti-sand tool by utilizing down flushing process |
| 12/01/2004 | CN2660111Y Down flushing anti-sand one-way fluid valve |
| 11/25/2004 | WO2004051055A3 Welbore cleanout tool and method |
| 11/25/2004 | US20040231840 Controlling Transient Pressure Conditions In A Wellbore |
| 11/24/2004 | CN2658392Y Tool for drifting of casing |
| 11/24/2004 | CN2658391Y Self-rotary scraper |
| 11/18/2004 | US20040226718 Method and device to reduce asphaltene and paraffin accumulations in wells |
| 11/17/2004 | CN2656625Y Screw oil extraction pump driving well washing device |
| 11/17/2004 | CN2656624Y Negative pressure swabbing device for oil well |
| 11/16/2004 | US6817412 Method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
| 11/10/2004 | EP1210500B1 Borehole cleaning apparatus and method |
| 11/09/2004 | CA2254563C High-volume sand trap and method |
| 11/01/2004 | CA2427410A1 Flameless hot oiler |
| 10/28/2004 | WO2004092633A2 Spoolable composite coiled tubing connector |
| 10/28/2004 | WO2003067016A3 Bi-directional thruster pig apparatus and method of utilizing same |
| 10/26/2004 | US6808019 Sucker rod guide and paraffin scraper for oil wells |
| 10/21/2004 | WO2004090281A1 Methods and compositions for stabilizing unconsolidated subterranean formations |
| 10/21/2004 | US20040206508 Remedial system to flush contaminants from tubing string |
| 10/21/2004 | US20040206507 Manifold device and method of use for accessing a casing annulus of a well |
| 10/20/2004 | EP1469281A2 Electronic surveying apparatus |
| 10/20/2004 | CN1538147A Electronic measuring device |
| 10/14/2004 | US20040204323 boring well bores using mixtures of water, nanoparticles comprising polyvinyl pyrrolidone or rubber latex, and optionally salts, antifoams, biocides,corrosion inhibitors, dispersants, flocculants,scavengers, lubricants, scavengers, antiscaling or flow control agents |
| 10/13/2004 | CN2648060Y Whirl pigging device |
| 10/13/2004 | CN2648059Y Movable self energy hot washing device for oil well |