| 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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| 06/28/2000 | CN2385076Y Casing damaged well shaping diameter-expanding cable tool impacter |
| 06/21/2000 | EP1009909A1 Installing a scrolled resilient sheet alongside the inner surface of a fluid conduit |
| 06/21/2000 | EP0815344B1 Whipstock |
| 06/21/2000 | CN2383965Y Movable grinding milling drilling appliance straightening device |
| 06/21/2000 | CN2383964Y Controller for grinding, milling, drilling and pressing |
| 06/21/2000 | CN2383963Y Eccentric casing roller |
| 06/21/2000 | CN2383962Y Movable guiding grinding shoe |
| 06/20/2000 | US6076602 Apparatus for completing a subterranean well and associated methods of using same |
| 06/20/2000 | US6076601 Collapsible cutter apparatus and method for cutting tubular members |
| 06/14/2000 | CN1256351A Casing repairing method utilizing reel |
| 06/08/2000 | WO2000032902A1 Downhole apparatus and method for milling a window and at least one key-way in a well casing |
| 06/07/2000 | EP0900320A4 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
| 06/07/2000 | CA2666668A1 Wellbore casing |
| 06/06/2000 | US6070665 Wellbore milling |
| 06/06/2000 | CA2141005C Wire cutting insert for gate valve |
| 05/24/2000 | EP1002932A2 Process and device for trenchless replacement of conduits |
| 05/23/2000 | US6065209 Method of fabrication, tooling and installation of downhole sealed casing connectors for drilling and completion of multi-lateral wells |
| 05/16/2000 | US6062265 Conduit and continuous coiled tubing system and method of assembly thereof |
| 05/11/2000 | WO2000026502A1 Connector for an expandable tubing string |
| 05/11/2000 | WO2000026496A1 Shearing arrangement for subsea umbilicals |
| 05/10/2000 | CN1052292C Cutting device for making a slot in an underground formation |
| 05/09/2000 | US6059037 Apparatus for completing a subterranean well and associated methods of using same |
| 05/04/2000 | WO1999002815A8 Device and method for creating ramifications in a bore hole |
| 05/02/2000 | US6056056 Whipstock mill |
| 04/26/2000 | EP0952899A4 Device for trenchless replacement of underground pipe |
| 04/25/2000 | US6053247 Method and apparatus for severing a tubular |
| 04/19/2000 | EP0993540A1 Device and method for creating ramifications in a bore hole |
| 04/18/2000 | US6050334 Single trip whipstock assembly |
| 04/12/2000 | EP0839254B1 Branch boreholes |
| 04/06/2000 | WO1999057409A3 A method and a plug for plugging a casing in a petroleum well and a tool for milling an opening in a casing in a petroleum well |
| 04/06/2000 | CA2249729A1 Producing fluids from subterranean formations through lateral wells |
| 04/05/2000 | CN2372446Y High-pressure hydraulic sand-blasting cutting device with fire |
| 03/28/2000 | US6041860 Apparatus and method for performing imaging and downhole operations at a work site in wellbores |
| 03/28/2000 | US6041855 High torque pressure sleeve for easily drillable casing exit ports |
| 03/14/2000 | US6035939 Wellbore anchor system |
| 03/14/2000 | US6035935 Method for establishing connectivity between lateral and parent wellbores |
| 03/07/2000 | US6032740 Hook mill systems |
| 03/07/2000 | US6032739 Method of locating wellbore casing collars using dual-purpose magnet |
| 03/02/2000 | WO2000011312A1 Grouting pipe equipment and method of grouting using the same for an underground water well |
| 03/01/2000 | EP0853715B1 Apparatus and method for milling a well casing |
| 02/16/2000 | EP0979344A1 A cutting insert for use in a wellbore milling tool |
| 02/15/2000 | US6024169 Method for window formation in wellbore tubulars |
| 02/15/2000 | US6024168 Wellborne mills & methods |
| 02/15/2000 | US6024166 Apparatus for forming a slot in a wellbore |
| 02/08/2000 | US6021850 Downhole pipe expansion apparatus and method |
| 01/25/2000 | USRE36526 Retrievable through tubing tool and method |
| 01/25/2000 | US6016753 Explosive pipe cutting |
| 01/20/2000 | DE19831661A1 Recovery of jammed drill strings, in which tool including cutters separates drill pipe permitting expansive sections to grip interior, for extraction by existing surface equipment |
| 01/18/2000 | US6015012 In-situ polymerization method and apparatus to seal a junction between a lateral and a main wellbore |
| 01/13/2000 | WO2000001921A1 Milling system for forming a window in the wall of a tubular |
| 01/11/2000 | US6013343 Patch for fabric air tubes |
| 01/11/2000 | US6012527 Method and apparatus for drilling and re-entering multiple lateral branched in a well |
| 01/11/2000 | US6012526 Method for sealing the junctions in multilateral wells |
| 01/05/2000 | DE19853198C1 Replacement of underground pipes of different diameter without digging, with optional expansion to greater conducting cross-sections |
| 01/05/2000 | CN1240493A System for controlling and stopping oil drilling fires |
| 01/04/2000 | US6009811 Charge assembly for a pipe-coupling cutting device |
| 12/23/1999 | WO1999066168A1 Method of and apparatus for horizontal well drilling |
| 12/23/1999 | DE19825582A1 Method for laying underground pipeline from access pit |
| 12/22/1999 | EP0837978B1 Single trip whipstock assembly |
| 12/21/1999 | US6003621 Methods and apparatus for drilling holes laterally from a well |
| 12/21/1999 | US6003601 Methods of completing a subterranean well and associated apparatus |
| 12/16/1999 | WO1999064715A1 Downhole milling device |
| 12/16/1999 | CA2334150A1 Downhole milling device |
| 12/15/1999 | EP0964132A2 Apparatus and method for cutting a tubular member |
| 12/11/1999 | CA2273799A1 Collapsible cutter apparatus and method for cutting tubular members |
| 12/07/1999 | US5996711 Method and apparatus for locating indexing systems in a cased well and conducting multilateral branch operations |
| 12/01/1999 | EP0961007A2 Expandable wellbore junction |
| 12/01/1999 | EP0960261A1 Tool and method for drilling a lateral well |
| 12/01/1999 | EP0960260A1 Tool for making an opening in a tubular in a wellbore |
| 12/01/1999 | CN1046976C Assembly for reinforcing well, special for drilling oil well |
| 12/01/1999 | CA2273396A1 Casing cutter blade support sleeve |
| 11/30/1999 | CA2120368C Method and apparatus for sealing the juncture between a vertical and horizontal well |
| 11/28/1999 | CA2443312A1 Expandable wellbore junction |
| 11/23/1999 | US5988272 Apparatus and method for milling a well casing |
| 11/18/1999 | WO1999058807A1 Guide device |
| 11/17/1999 | CN2349344Y High-efficient grind shoe |
| 11/16/1999 | US5984005 Wellbore milling inserts and mills |
| 11/11/1999 | WO1999057409A2 A method and a plug for plugging a casing in a petroleum well and a tool for milling an opening in a casing in a petroleum well |
| 11/10/1999 | EP0750716B1 Milling tool |
| 11/09/1999 | US5979943 Shearable completion riser joint |
| 11/09/1999 | US5979571 Combination milling tool and drill bit |
| 11/04/1999 | WO1999056000A1 Deformable liner tube |
| 11/04/1999 | WO1999055999A1 Foldable tube |
| 11/03/1999 | EP0952899A1 Device for trenchless replacement of underground pipe |
| 10/27/1999 | EP0952306A1 Foldable tube |
| 10/27/1999 | EP0952305A1 Deformable tube |
| 10/26/1999 | US5971074 Methods of completing a subterranean well and associated apparatus |
| 10/26/1999 | US5971073 Methods of completing a subterranean well and associated apparatus |
| 10/13/1999 | EP0948703A2 Apparatus and method for expanding a liner patch; a stroke indicator; and a tubular patch |
| 10/13/1999 | EP0948700A2 Whipstock |
| 10/07/1999 | WO1999050528A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 10/05/1999 | US5960873 Producing fluids from subterranean formations through lateral wells |
| 09/29/1999 | EP0944766A1 System for controlling and stopping oil drilling fires |
| 09/28/1999 | US5957195 Wellbore tool stroke indicator system and tubular patch |
| 09/28/1999 | CA2073332C Centralizers for oil well casings |
| 09/21/1999 | US5954134 Methods of completing a subterranean well and associated apparatus |
| 09/21/1999 | US5954132 Patching of injection and production well annular casing leaks for restoring mechanical integrity |
| 09/21/1999 | US5954130 For use in a subterranean well casing |
| 09/14/1999 | US5950742 Methods and related equipment for rotary drilling |
| 09/13/1999 | CA2261495A1 Method for milling casing and drilling formation |