| 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) |
|---|
| 11/10/1994 | WO1994025655A1 Preform or matrix tubular structure for well casing |
| 11/08/1994 | US5362318 Consolidation agent and method |
| 11/08/1994 | US5361843 Method for completing a well |
| 11/08/1994 | US5361840 Well plugging apparatus and method |
| 11/01/1994 | US5360061 Blowout preventer with tubing shear rams |
| 11/01/1994 | CA2041900C Hydraulic drilling jar |
| 10/11/1994 | US5353876 Method and apparatus for sealing the juncture between a verticle well and one or more horizontal wells using mandrel means |
| 10/05/1994 | CN2178782Y Waterpower expanding casing window opening tool |
| 10/04/1994 | US5351758 Tubing and profile reaming tool |
| 10/01/1994 | CA2120108A1 Internally sealable perforable nipple for downhole well applications |
| 09/29/1994 | WO1994021886A1 Method for isolating a wellbore formation zone |
| 09/29/1994 | CA2157409A1 A method for isolating a zone of a formation or reservoir penetrated by a wellbore |
| 09/27/1994 | US5350015 Rotary downhole cutting tool |
| 09/21/1994 | CN2177801Y Hydraulic anchor for diameter 168mm casing |
| 09/21/1994 | CN2177798Y Casing explosion expanding machine |
| 09/20/1994 | US5348095 Method of creating a wellbore in an underground formation |
| 09/15/1994 | WO1994020727A1 Guide assembly and method |
| 09/06/1994 | US5343965 Apparatus and methods for horizontal completion of a water well |
| 08/18/1994 | WO1994018429A1 Sealing device for sealing of holes in the wall of a pipe in a curved oil well, an anchoring device for the sealing device and a tool for mounting of the sealing device and the anchoring device |
| 08/16/1994 | US5337809 Well casing liner suspension hanger |
| 08/04/1994 | WO1994009243A3 Retrievable whipstock system |
| 08/04/1994 | DE4302447A1 Pipeline shut=off device |
| 07/21/1994 | WO1994016190A1 Method and apparatus for setting a whipstock |
| 07/07/1994 | WO1994015062A1 Anti-rotation devices for use with well tools |
| 06/29/1994 | CN2170370Y Casing cathode protector special for oil field |
| 06/28/1994 | CA2067817C Muscarinic receptor antagonists |
| 06/21/1994 | US5322118 Downhole chemical cutter |
| 06/21/1994 | US5322019 System for the initiation of downhole explosive and propellant systems |
| 06/14/1994 | US5320178 Sand control screen and installation method for wells |
| 06/14/1994 | US5320174 Downhole chemical cutting tool and process |
| 06/07/1994 | US5318122 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means |
| 05/17/1994 | CA2036674C Pipe bursting and replacement apparatus and method |
| 05/10/1994 | US5310000 Foil wrapped base pipe for sand control |
| 04/28/1994 | WO1994009248A1 Method for forming a window in a subsurface well conduit |
| 04/28/1994 | WO1994009243A2 Retrievable whipstock system |
| 04/28/1994 | CA2125772A1 Retrievable whipstock system |
| 04/26/1994 | US5306750 Polymer containing epoxy compound; storage stability; road paving, roofing |
| 04/26/1994 | US5306101 Cutting/expanding tool |
| 04/20/1994 | EP0593280A1 Blowout preventer with tubing shear rams |
| 04/19/1994 | US5303776 Device for a down-hole assembly |
| 04/15/1994 | CA2106920A1 Blowout preventer with tubing shear rams |
| 04/12/1994 | US5301760 Completing horizontal drain holes from a vertical well |
| 04/12/1994 | CA2012290C Shearing gate valve |
| 03/29/1994 | US5297630 Downhole milling tool |
| 03/25/1994 | CA2106921A1 Dedicated perforatable nipple with integral isolation sleeve |
| 03/22/1994 | US5295541 Casing repair using a plastic resin |
| 03/22/1994 | CA2106530A1 Downhole milling tool |
| 03/02/1994 | EP0436706B1 Apparatus for recovering a wellhead |
| 03/01/1994 | US5289876 Completing wells in incompetent formations |
| 02/22/1994 | US5287921 Method and apparatus for setting a whipstock |
| 02/22/1994 | US5287920 Large head downhole chemical cutting tool |
| 02/17/1994 | WO1994003702A1 Method and apparatus for sealing the juncture between a vertical and horizontal well |
| 02/17/1994 | WO1994003701A1 Method and apparatus for sealing the juncture between a vertical and horizontal well |
| 02/16/1994 | EP0397875B1 Pipe roller-expanding device |
| 02/15/1994 | US5285706 Pipe threading apparatus |
| 02/08/1994 | US5284209 Coiled tubing cutting modification |
| 02/01/1994 | US5282509 Method for cleaning cement plug from wellbore liner |
| 01/26/1994 | EP0579660A1 Plumbling apparatus |
| 01/25/1994 | US5280823 Apparatus for regaining control over oil and gas flowing from "blow out" wells |
| 01/11/1994 | US5277251 Method for forming a window in a subsurface well conduit |
| 01/05/1994 | CN1023419C Hydraulic drilling jar |
| 01/04/1994 | CA1325802C Cutting tool for removing man-made members from well bore |
| 12/28/1993 | CA1325545C Milling tool for cutting well casing |
| 12/23/1993 | WO1993025799A1 Method of creating a wellbore in an underground formation |
| 12/22/1993 | EP0575116A1 Downhole chemical cutting tool and process |
| 12/22/1993 | EP0575115A1 Downhole chemical cutter |
| 12/22/1993 | EP0575114A1 Large head downhole chemical cutting tool |
| 12/21/1993 | US5271468 Downhole tool apparatus with non-metallic components and methods of drilling thereof |
| 11/30/1993 | US5265675 Well conduit cutting and milling apparatus and method |
| 11/18/1993 | EP0570157A2 Downhole tool apparatus with non-metallic slips |
| 11/16/1993 | US5261488 Centralizers for oil well casings |
| 11/09/1993 | US5259454 Process for controlling oil well fires |
| 11/02/1993 | CA2007557C Shearing gate valve |
| 10/19/1993 | US5253714 Well service tool |
| 10/06/1993 | EP0528801A4 Pipe bursting and replacement apparatus and method |
| 10/05/1993 | US5249630 Perforating type lockout tool |
| 09/30/1993 | WO1993019283A1 Anti-rotation devices for use in wellbores |
| 09/30/1993 | WO1993019281A1 Well conduit cutting and milling apparatus and method |
| 09/30/1993 | CA2132858A1 Well conduit cutting and milling apparatus and method |
| 09/28/1993 | CA1322520C Method and apparatus for repairing wall casings and the like |
| 09/21/1993 | US5246069 Self-aligning well apparatuses and anti-rotation device for well apparatuses |
| 09/16/1993 | DE4218627C1 Tubing constriction appts. for burning oil well - has slide with jaws provided with explosive charge |
| 09/15/1993 | CN1022120C Pipe-expanding device |
| 09/14/1993 | CA1322151C Device for expanding pipes |
| 09/07/1993 | US5242017 Cutter blades for rotary tubing tools |
| 09/06/1993 | CA2062360A1 Emergency release device for drilling |
| 09/02/1993 | WO1993016833A1 Broaching tool for tubing |
| 08/24/1993 | US5238069 System for preventing cutting gas explosion during subterranean pipe cutting operations |
| 08/11/1993 | CN2139986Y Automatic anti-stopping system for oil extraction |
| 08/05/1993 | DE4218626C1 Arrangement for reducing cross=sectional area of pipe, e.g. oil conveying pipe - includes explosive charge on 1 of 2 jaws for detonating and forcing jaws against pipe |
| 08/04/1993 | CN1074970A Explosives for underground welding and expanding well casing in oil field |
| 07/20/1993 | CA1320437C Method of placing a body of shape memory material within a cavity |
| 07/20/1993 | CA1320434C Method of casing off a producing formation in a well |
| 07/06/1993 | US5224540 Downhole tool apparatus with non-metallic components and methods of drilling thereof |
| 06/15/1993 | US5219028 Well casing and well casing method |
| 05/18/1993 | US5211715 Coring with tubing run tools from a producing well |
| 05/18/1993 | US5211233 Consolidation agent and method |
| 05/11/1993 | US5209600 Method and apparatus for repairing casings and the like |
| 05/11/1993 | US5209175 Emergency release device for drilling |
| 05/04/1993 | US5207779 Method and apparatus for closing a wellhead casing |