| 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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| 12/06/2001 | US20010047872 In-tubing wellbore sidetracking operations |
| 12/06/2001 | US20010047871 Use of helically wound tubular structure in the downhole environment |
| 12/06/2001 | US20010047870 Apparatus for forming wellbore casing |
| 12/06/2001 | US20010047866 Wellbore casing |
| 12/06/2001 | CA2408514A1 Use of helically wound tubular structure in the downhole environment |
| 12/05/2001 | EP1159510A2 Wellbore primary barrier and related systems |
| 12/04/2001 | US6325164 Device and method for creating bore-hole branches |
| 11/29/2001 | US20010045289 Wellbore casing |
| 11/29/2001 | US20010045284 Apparatus and methods for expanding tubulars in a wellbore |
| 11/29/2001 | US20010045283 Control line cutting tool and method |
| 11/29/2001 | US20010045282 Combined notching and jetting methods and related apparatus |
| 11/22/2001 | WO2001088336A1 Well reference apparatus and method |
| 11/22/2001 | WO2001088330A1 Control line cutting tool and method |
| 11/21/2001 | EP1155215A2 Mills for wellbore operations |
| 11/20/2001 | US6318466 Method and apparatus for accurate milling of windows in well casings |
| 11/15/2001 | WO2001086111A1 Apparatus and methods for forming a lateral wellbore |
| 11/15/2001 | US20010040054 Apparatus and methods for forming a lateral wellbore |
| 11/15/2001 | US20010039711 Installing a scrolled resilient sheet alongside the inner surface of a fluid conduit |
| 11/14/2001 | EP1153195A1 Downhole apparatus and method for milling a window and at least one key-way in a well casing |
| 11/08/2001 | WO2001014090B1 Explosive pipe cutting device |
| 11/07/2001 | EP1151180A1 Tubing anchor |
| 11/01/2001 | WO2001081710A1 Central circulation completion system |
| 11/01/2001 | US20010035302 Method for milling casing and drilling formation |
| 10/24/2001 | EP1147287A2 Procedures and equipment for profiling and jointing of pipes |
| 10/23/2001 | US6305880 Device and method for trenchless replacement of underground pipe |
| 10/18/2001 | WO2001077484A1 Method and device for testing a well |
| 10/18/2001 | WO2001077481A1 Whipstock asssembly |
| 10/17/2001 | EP1144802A2 Profile formation |
| 10/16/2001 | US6302205 Method for locating a drill bit when drilling out cementing equipment from a wellbore |
| 10/16/2001 | US6302198 One trip milling system |
| 10/10/2001 | EP1141518A1 Downhole sealing for production tubing |
| 10/10/2001 | EP1141517A1 Drilling method |
| 10/10/2001 | EP1141515A1 Method and apparatus for expanding a liner patch |
| 10/09/2001 | US6298913 Explosive pipe cutting device |
| 10/04/2001 | US20010026736 Cutting matrix and method applying the same |
| 10/04/2001 | EP1138873A1 System and method for communicating hydraulic control to a wireline retrievable downhole device |
| 10/03/2001 | CN2451723Y Reducing hydrophthalmia dredging apparatus |
| 10/02/2001 | US6296066 Well system |
| 10/02/2001 | US6296053 Controlled breaking of cables in a well casing |
| 09/19/2001 | CN1313927A Grouting pipe equipment and method of grouting using the same for an underground water well |
| 09/13/2001 | WO2001066901A1 Deflecting tool including millable or drillable plug and method of use |
| 09/13/2001 | WO1997027380A3 Method for forming a window in a tubular and apparatus for use in said method |
| 09/12/2001 | EP1132567A1 Hydrajet window cutting in well casing |
| 09/12/2001 | EP1132566A2 Double shearing rams for ram type blowout preventer |
| 09/11/2001 | US6286599 Method and apparatus for lateral casing window cutting using hydrajetting |
| 09/10/2001 | CA2340268A1 Method and apparatus for lateral casing window cutting using hydrajetting |
| 09/07/2001 | CA2331579A1 Double shearing rams for ram type blowout preventer |
| 09/05/2001 | EP1129271A1 Shearing arrangement for subsea umbilicals |
| 09/04/2001 | US6283211 Method of patching downhole casing |
| 08/29/2001 | EP1127210A1 Connector for an expandable tubing string |
| 08/28/2001 | US6279363 Method and device for controlling the deformation of an uncoiled metal pipe |
| 08/23/2001 | WO2001061141A1 Horizontal directional drilling in wells |
| 08/21/2001 | US6276690 Ribbed sealing element and method of use |
| 08/21/2001 | US6276452 Apparatus for removal of milling debris |
| 08/14/2001 | CA2142994C Method for forming a window in a subsurface well conduit |
| 08/09/2001 | US20010011591 Guide device |
| 08/01/2001 | EP0698175A4 Well plugging apparatus and method |
| 07/31/2001 | US6267179 Method and apparatus for accurate milling of windows in well casings |
| 07/31/2001 | CA2333250A1 Combined notching and jetting methods and related apparatus |
| 07/26/2001 | WO2001053650A1 Method and apparatus for a combined exit guide and sectional mill for sidetracking |
| 07/26/2001 | DE19947652C1 Schutzmantelerzeugung beim Verlegen von Leitungen Mantle generation when routing cables |
| 07/25/2001 | CN1305562A Downhole milling device |
| 07/24/2001 | US6263966 Expandable well screen |
| 07/17/2001 | US6260623 Apparatus and method for utilizing flexible tubing with lateral bore holes |
| 07/10/2001 | US6257353 Horizontal drilling method and apparatus |
| 07/05/2001 | WO2001014090A9 Explosive pipe cutting device |
| 07/04/2001 | CN2437844Y Explosion shaper |
| 07/04/2001 | CN2437843Y 爆炸整形器 Explosion shaper |
| 06/28/2001 | WO2001046549A1 Three dimensional steerable system |
| 06/14/2001 | WO2001014090A3 Explosive pipe cutting device |
| 06/13/2001 | CN2434427Y Expanding reshaping appts |
| 06/12/2001 | US6244336 Double shearing rams for ram type blowout preventer |
| 06/12/2001 | CA2201567C Method of longitudinally splitting a pipe coupling within a wellbore |
| 06/07/2001 | US20010002626 Method of creating a wellbore in an underground formation |
| 06/06/2001 | EP0888490B1 Mill for wellbore milling operations |
| 06/06/2001 | CN1298469A Foldable tube |
| 06/06/2001 | CN1298468A Deformable liner tube |
| 05/31/2001 | WO2001038693A1 Pipe expansion device |
| 05/31/2001 | WO2001038692A2 Sealing off openings through the wall of a well tubular |
| 05/29/2001 | US6237688 Pre-drilled casing apparatus and associated methods for completing a subterranean well |
| 05/15/2001 | US6230627 Method and apparatus for removing abandoned offshore fixed platform |
| 05/10/2001 | WO2001033037A1 Wellbore casing repair |
| 05/03/2001 | WO2001031163A1 Sleeve for stiffening an output shaft on a mill |
| 05/03/2001 | WO2001031160A1 Method and apparatus for operations in underground/subsea oil and gas wells |
| 05/03/2001 | WO2001031159A1 One trip milling system |
| 05/02/2001 | EP1095204A1 Borehole conduit cutting apparatus |
| 04/18/2001 | EP1092077A1 Milling system for forming a window in the wall of a tubular |
| 04/18/2001 | EP0900319B1 Process and device for separation of pipes or columns fixed in the ground |
| 04/12/2001 | WO2001025677A1 Creation of a protective jacket during the laying of lines |
| 04/11/2001 | CN2426520Y Borehole slotting device |
| 04/10/2001 | US6213210 Removal of lining from tubing |
| 04/04/2001 | EP1088151A1 Downhole milling device |
| 04/04/2001 | EP0852652A4 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
| 04/03/2001 | US6209645 Method and apparatus for accurate milling of windows in well casings |
| 04/03/2001 | US6209636 Wellbore primary barrier and related systems |
| 03/28/2001 | EP0800610B1 Apparatus for forming a slot in a wellbore |
| 03/27/2001 | US6206111 High pressure internal sleeve for use with easily drillable exit ports |
| 03/20/2001 | US6202761 Directional drilling method and apparatus |
| 03/20/2001 | US6202752 Wellbore milling methods |
| 03/15/2001 | WO2001018353A1 Expandable downhole tubing |