| 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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| 08/28/2002 | EP0979344B1 A cutting insert for use in a wellbore milling tool |
| 08/28/2002 | EP0851963B1 Milling apparatus |
| 08/27/2002 | US6439313 Downhole machining of well completion equipment |
| 08/22/2002 | US20020112338 Profile formation |
| 08/21/2002 | EP1232327A2 Sealing off openings through the wall of a well tubular |
| 08/21/2002 | CN1365418A Method for creating a weld in a wellbore |
| 08/15/2002 | WO2002063132A1 Oil well perforator |
| 08/15/2002 | WO2002032634A3 Fluid cutting tool and method for cutting tubular member with a jet of fluid |
| 08/15/2002 | WO2001038692A8 Sealing off openings through the wall of a well tubular |
| 08/08/2002 | US20020104647 Expander |
| 08/08/2002 | DE4302447C2 Absperrgerät für Flüssigkeiten und Gase in Rohren Shut-off device for liquids and gases in pipes |
| 08/01/2002 | WO2002058868A1 Cutting matrix and method of applying the same |
| 08/01/2002 | WO2001009481A9 Anti-rotation device for use with well tools |
| 07/30/2002 | US6425444 Method and apparatus for downhole sealing |
| 07/30/2002 | US6425442 Anti-rotation device for use with well tools |
| 07/26/2002 | CA2563145A1 Sand barrier for a level 3 multilateral wellbore junction |
| 07/24/2002 | EP1224376A1 Sleeve for stiffening an output shaft on a mill |
| 07/24/2002 | CN2502004Y Hydraulic inner cutter |
| 07/23/2002 | US6422328 Dual cutting mill |
| 07/17/2002 | EP1223304A2 Apparatus and method for forming a window or an outline thereof in the casing of a cased wellbore |
| 07/17/2002 | EP1222357A1 One trip milling system |
| 07/16/2002 | US6419025 Method of selective plastic expansion of sections of a tubing |
| 07/04/2002 | WO2002052124A2 Method and apparatus for repair operations downhole |
| 06/27/2002 | US20020079106 Procedures and equipment for profiling and jointing of pipes |
| 06/25/2002 | US6408944 Apparatus and method to shut down a pipeline |
| 06/18/2002 | US6405804 Method and apparatus for retrieving a deflecting tool |
| 06/13/2002 | US20020070021 Guide device |
| 06/11/2002 | US6401821 Method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 06/06/2002 | US20020067954 Device and method for trenchless replacement of underground pipe |
| 06/06/2002 | US20020066577 Well reference apparatus and method |
| 06/06/2002 | US20020066576 Isolation of subterranean zones |
| 06/05/2002 | EP1210501A1 Expandable downhole tubing |
| 06/04/2002 | US6397959 Mill |
| 06/04/2002 | US6397950 Apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing |
| 06/04/2002 | US6397948 Shearing arrangement for subsea umbilicals |
| 05/30/2002 | US20020062956 Self-lubricating swage |
| 05/23/2002 | WO2002040825A1 Expander |
| 05/23/2002 | US20020060079 Method and apparatus for downhole sealing |
| 05/23/2002 | US20020060078 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/23/2002 | US20020060076 Abandonment and retrieval apparatus and method |
| 05/23/2002 | US20020060074 Window forming by flame cutting |
| 05/23/2002 | US20020060073 One-trip milling system |
| 05/23/2002 | US20020060069 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/23/2002 | US20020060068 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/22/2002 | EP1206623A1 Anti-rotation device for use with well tools |
| 05/16/2002 | WO2002038343A2 Apparatus and methods for separating and joining tubulars in a wellbore |
| 05/02/2002 | WO2002035055A1 Combined milling and scraping tool |
| 05/02/2002 | US20020050360 Forming a wellbore casing while simultaneously drilling a wellbore |
| 04/25/2002 | WO2002032634A2 Fluid cutting tool and method for cutting tubular member with a jet of fluid |
| 04/25/2002 | US20020046840 Expandanble tubing and method |
| 04/24/2002 | EP1198658A1 Method of creating a weld in a wellbore |
| 04/24/2002 | CN1083523C Method and apparatus for drilling and re-entering multiple lateral branches in well |
| 04/23/2002 | US6374918 In-tubing wellbore sidetracking operations |
| 04/23/2002 | US6374916 Method and apparatus for stiffening an output shaft on a cutting tool assembly |
| 04/17/2002 | EP0909363A4 Side pocket mandrel for a measuring instrument |
| 04/17/2002 | CN2486247Y Milling head for well repairing device |
| 04/16/2002 | US6371203 Method of creating a wellbore in an underground formation |
| 04/11/2002 | US20020040787 Forming a wellbore casing while simultaneously drilling a wellbore |
| 04/04/2002 | WO2001098623B1 Radial expansion of tubular members |
| 04/04/2002 | WO2000063521A9 Method and apparatus for accurate milling of windows in well casings |
| 04/03/2002 | EP0993540B1 Device and method for creating ramifications in a bore hole |
| 03/28/2002 | WO2002025050A2 Downhole machining of well completion equipment |
| 03/28/2002 | CA2423000A1 Downhole machining of well completion equipment |
| 03/21/2002 | WO2002023008A2 Methods and apparatus for forming a lateral wellbore |
| 03/20/2002 | EP0901559A4 Multicut window mill |
| 03/19/2002 | US6357528 One-trip casing cutting & removal apparatus |
| 03/14/2002 | US20020030325 Ribbed sealing element and method of use |
| 03/12/2002 | US6354375 Lateral well tie-back method and apparatus |
| 03/05/2002 | US6352118 System and method for communication hydraulic control to a wireline retrievable downhole device |
| 03/05/2002 | US6352112 Flexible swage |
| 02/28/2002 | US20020023755 Method of removing wellhead assemblies |
| 02/13/2002 | EP1179115A1 In-tubing wellbore sidetracking operations |
| 02/07/2002 | WO2002010551A1 Liner hanger with slip joint sealing members and method of use |
| 01/24/2002 | US20020007970 Well system |
| 01/23/2002 | EP1173655A1 Ribbed sealing element and method of use |
| 01/23/2002 | EP1173654A1 Controlled breaking of cables in a well casing |
| 01/17/2002 | WO2002004783A1 Deformable member |
| 01/17/2002 | WO2002004782A1 Apparatus and methods for orientation of a tubular string in a non-vertical wellbore |
| 01/17/2002 | US20020005286 Horizontal directional drilling in wells |
| 01/16/2002 | EP0815345B1 Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular |
| 01/10/2002 | WO2002002903A1 Milling of casing using coiled tubing |
| 01/10/2002 | US20020003040 Apparatus and methods for orientation of a tubular string in a non-vertical wellbore |
| 01/09/2002 | EP1169547A1 Method of creating a wellbore in an underground formation |
| 01/09/2002 | EP1169541A1 Method of selective plastic expansion of sections of a tubing |
| 01/09/2002 | EP1129271A4 Shearing arrangement for subsea umbilicals |
| 01/03/2002 | WO2002001176A1 Tubular isolation |
| 01/03/2002 | WO2002001043A1 Method and device for performing a portion of casing in a reservoir |
| 01/02/2002 | EP1165930A1 Whipstock casing milling system |
| 01/01/2002 | US6334487 Valve assembly |
| 12/27/2001 | WO2001098623A1 Radial expansion of tubular members |
| 12/27/2001 | US20010054506 Method and apparatus for forming an optimized window |
| 12/20/2001 | US20010052427 Three dimensional steerable system |
| 12/18/2001 | US6330919 Method of removing wellhead assemblies and cutting assembly for use therein |
| 12/13/2001 | WO2001094746A1 Wellbore liner system |
| 12/13/2001 | WO2001038692A3 Sealing off openings through the wall of a well tubular |
| 12/13/2001 | DE10022621C1 Underground pipeline renewal method uses micro-tunneling technology for removal of old pipeline and simultaneous laying of new pipeline |
| 12/12/2001 | CN2464929Y Adjustable sand-jetting hole-patching hole controller |
| 12/11/2001 | US6328113 Isolation of subterranean zones |
| 12/11/2001 | US6328110 Process for destroying a rigid thermal insulator positioned in a confined space |
| 12/06/2001 | WO2001092680A1 Use of helically wound tubular structure in the downhole environment |