Patents for E21B 29 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground (5,744) |
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06/05/1996 | EP0699271A4 Sand screen structure |
06/04/1996 | US5522461 Mill valve |
05/22/1996 | EP0712993A2 A milling insert and a milling tool |
05/15/1996 | CN1122619A Preform or matrix tubular structure for well casing |
05/14/1996 | US5515916 Blowout preventer |
05/07/1996 | US5513570 Pressure actuated pipe cutting tool |
05/01/1996 | EP0708873A1 Downhole milling tool |
04/23/1996 | US5509480 Chemical cutter and method for high temperature tubular goods |
04/23/1996 | US5509440 Device for cutting a pipe in order to stop a fluid flow |
04/17/1996 | EP0688393A4 Method for isolating a wellbore formation zone |
04/16/1996 | US5507346 Composite well flow conductor |
04/16/1996 | US5507343 Apparatus for repairing damaged well casing |
04/04/1996 | DE4434700A1 Method of repairing buried, cracked reinforced concrete pipes |
04/03/1996 | CN2223775Y Tool for cutting or milling castings |
03/28/1996 | WO1996009460A2 Apparatus for milling a well casing |
03/26/1996 | US5501424 Wire cutting insert for gate valve |
03/26/1996 | US5501281 Torque-resistant, seal setting force-limited, hydraulically settable well packer structure and associated methods |
03/19/1996 | US5499681 Centralizing liner hanger method and system for subterranean multilateral well drilling |
03/19/1996 | US5499680 Diverter, diverter retrieving and running tool and method for running and retrieving a diverter |
03/13/1996 | EP0701045A2 Multilateral well drilling and completion method and apparatus |
03/06/1996 | EP0699271A1 Sand screen structure |
02/28/1996 | EP0698175A1 Well plugging apparatus and method |
02/28/1996 | EP0698136A1 Preform or matrix tubular structure for well casing |
02/27/1996 | US5494106 Method for sealing between a lining and borehole, casing or pipeline |
02/15/1996 | WO1996004457A1 Device and method for making a slot in an underground formation |
02/01/1996 | DE4439546C1 Method for permanent closure of earth drillings |
01/31/1996 | CN1115827A Explosive patching process of oil well casing |
01/30/1996 | CA2014145C Milling tool and combined stabiliser |
01/03/1996 | EP0690201A2 Forming casing window off whipstock set in cement plug |
12/28/1995 | WO1995035429A1 Pipe cutter |
12/28/1995 | CA2152638A1 Forming casing window off whipstock set in cement plug |
12/27/1995 | EP0688393A1 Method for isolating a wellbore formation zone |
12/19/1995 | CA2007461C Whipstock starter mill with pressure drop tattletale |
12/12/1995 | US5474126 Retrievable whipstock system |
12/05/1995 | US5472052 Method of abandoning a well and apparatus therefor |
11/21/1995 | US5467824 Apparatus for and a method of severing multiple casing strings using explosives |
11/02/1995 | EP0679796A2 Ball valve |
10/25/1995 | EP0678656A2 Ram-type blowout preventor |
10/20/1995 | CA2145145A1 Ram-type blowout preventer |
10/18/1995 | EP0677135A1 Method and apparatus for setting a whipstock |
10/17/1995 | US5457995 Horizontal boring pipe penetration detection system and method |
10/11/1995 | EP0676002A1 Anti-rotation devices for use with well tools |
10/10/1995 | US5456319 Apparatus and method for blocking well perforations |
10/10/1995 | US5456312 For removing material from a well bore |
10/03/1995 | US5454419 Method for lining a casing |
09/28/1995 | WO1995025875A1 Milling tool |
09/26/1995 | US5452759 Whipstock system |
09/21/1995 | WO1995025002A1 Improvements relating to the lining of pipelines and passageways |
08/29/1995 | US5445222 Whipstock and staged sidetrack mill |
08/22/1995 | US5443129 Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole |
07/25/1995 | US5435394 Anchor system for pipe cutting apparatus |
07/25/1995 | US5435388 Well plugging apparatus and method |
07/19/1995 | EP0663040A1 Method for forming a window in a subsurface well conduit |
07/11/1995 | US5431220 Whipstock starter mill assembly |
07/11/1995 | US5431219 Forming casing window off whipstock set in cement plug |
07/04/1995 | US5429187 Milling tool and operations |
06/27/1995 | CA2085567C Cutter blades for rotary tubing tools |
06/20/1995 | US5425417 Wellbore tool setting system |
06/15/1995 | WO1995016102A1 Method for abandonment of subseawells |
06/13/1995 | US5423387 Method for sidetracking below reduced-diameter tubulars |
05/17/1995 | EP0653548A2 Method of cutting a structural substrate with liquid-borne abrasives |
05/13/1995 | CA2135565A1 Method of cutting high strength materials with water soluble abrasives |
05/09/1995 | US5413184 Method of and apparatus for horizontal well drilling |
05/04/1995 | WO1995007404A3 Apparatus for use in a wellbore |
05/04/1995 | DE4337340A1 Reaming bit for drainage filter wells |
04/25/1995 | US5409060 Wellbore tool orientation |
04/19/1995 | EP0596040B1 Device for cutting a pipe in order to stop a fluid flow |
04/18/1995 | US5407011 Downhole mill and method for milling |
04/13/1995 | WO1995009963A1 Method of and apparatus for horizontal well drilling |
04/13/1995 | CA2172498A1 Method of and apparatus for horizontal well drilling |
04/11/1995 | US5404950 Enhanced oil recovery |
04/04/1995 | US5402855 Coiled tubing tools for jet drilling of deviated wells |
03/28/1995 | US5400857 Oilfield tubular shear ram and method for blowout prevention |
03/22/1995 | EP0643794A1 Method of creating a wellbore in an underground formation. |
03/16/1995 | WO1995007404A2 Apparatus for use in a wellbore |
03/15/1995 | CN1100177A Jet-recoil type underground pipe cutter and method for exposing ore bed |
03/14/1995 | US5396950 Apparatus and methods for horizontal completion of a water well |
03/01/1995 | EP0511254B1 Centralizers for oil well casings |
03/01/1995 | CN2190692Y Sleeve explosion mending device |
02/28/1995 | US5392862 Flow control sub for hydraulic expanding downhole tools |
02/21/1995 | US5390742 Internally sealable perforable nipple for downhole well applications |
02/21/1995 | US5390737 Downhole tool with sliding valve |
02/21/1995 | US5390736 Anti-rotation devices for use with well tools |
02/02/1995 | WO1995003474A1 Downhole milling tool |
02/02/1995 | WO1995003473A1 Downhole milling tool |
02/01/1995 | CN2188646Y Side drilling tool |
01/31/1995 | CA2021672C Coiled tubing velocity string hangoff method and apparatus |
01/17/1995 | US5381631 Method and apparatus for cutting metal casings with an ultrahigh-pressure abrasive fluid jet |
01/04/1995 | EP0631646A1 Well conduit cutting and milling apparatus and method |
01/03/1995 | US5377757 Low temperature epoxy system for through tubing squeeze in profile modification, remedial cementing, and casing repair |
12/20/1994 | US5373906 Orientable guide assembly and method of use |
12/20/1994 | US5373900 In a cutting tool |
12/20/1994 | CA2126289A1 Method of abandoning a well and apparatus therefor |
12/13/1994 | US5372198 Abandonment of sub-sea wells |
12/08/1994 | WO1994028284A1 Sand screen structure |
12/08/1994 | CA2163754A1 Sand screen structure |
12/06/1994 | US5370362 Gate valve |
12/06/1994 | US5370183 Well casing guide string and repair method |
11/22/1994 | US5366015 Method of cutting high strength materials with water soluble abrasives |
11/10/1994 | WO1994025725A1 Well plugging apparatus and method |