| Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712) |
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| 06/08/1999 | US5909770 Retrievable whipstock |
| 06/08/1999 | US5909769 Fluid loss device |
| 06/03/1999 | WO1999027230A2 Method for locating placement of a guide stock in a multilateral well and apparatus therefor |
| 06/03/1999 | WO1999027223A2 Method and apparatus for injecting coil tubing down pipelines |
| 05/27/1999 | WO1999025524A1 Method and apparatus for manufacturing an expandable slotted tube |
| 05/25/1999 | US5906242 Method of suspending and ESP within a wellbore |
| 05/25/1999 | US5906240 Slip having passageway for lines therethrough |
| 05/25/1999 | CA2134273C Spoolable coiled tubing completion system |
| 05/20/1999 | WO1999024691A1 Reciprocating running tool |
| 05/20/1999 | WO1999024689A1 Assembly and process for drilling and completing multiple wells |
| 05/20/1999 | CA2308464A1 Reciprocating running tool |
| 05/19/1999 | EP0916014A1 Apparatus and method for milling a hole in casing |
| 05/14/1999 | WO1999023354A1 Expandable downhole tubing |
| 05/11/1999 | US5901799 Connection for first and second members |
| 05/11/1999 | US5901796 Circulating sub apparatus |
| 05/11/1999 | US5901787 For use in an oil or gas well |
| 05/11/1999 | CA2137936C Retrievable whipstock arrangement and method |
| 05/11/1999 | CA2096820C Directional drilling with downhole motor on coiled tubing |
| 05/06/1999 | WO1999022116A1 An apparatus for the removal of sand in an underwater well and use of a jet pump (ejector) in connection with such sand removal |
| 05/06/1999 | WO1999022114A1 Method and apparatus for shutting in a well while leaving drill stem in the borehole |
| 05/05/1999 | CN1215789A Well system |
| 04/29/1999 | WO1999020871A1 Flexible sinker bar assemblies |
| 04/29/1999 | DE19746511A1 Pipeline test apparatus |
| 04/28/1999 | EP0911483A2 Well system including composite pipes and a downhole propulsion system |
| 04/28/1999 | EP0910725A1 Wellbores utilizing fiber optic-based sensors and operating devices |
| 04/27/1999 | US5896926 Packer type groundwater sampling system and water sampling method |
| 04/20/1999 | US5895619 Method for casting a bidirectional foam pig |
| 04/20/1999 | US5894890 Normally closed retainer valve with fail-safe pump through capability |
| 04/14/1999 | EP0907822A1 Method for expanding a steel tubing and well with such as tubing |
| 04/13/1999 | US5893414 Device for intensification of hydrocarbon production and hydrocarbons production system |
| 04/13/1999 | US5893413 Hydrostatic tool with electrically operated setting mechanism |
| 04/08/1999 | WO1999005478A3 Flow measurement mandrel |
| 04/07/1999 | EP0906490A2 Downhole apparatus |
| 04/06/1999 | US5890542 Apparatus for early evaluation formation testing |
| 04/06/1999 | US5890540 Downhole tool |
| 03/31/1999 | EP0904479A1 Multi-cycle circulating sub |
| 03/30/1999 | US5887668 Wellbore milling-- drilling |
| 03/30/1999 | US5887660 Liner packer assembly and method |
| 03/30/1999 | US5887657 Pressure test method for permanent downhole wells and apparatus therefore |
| 03/30/1999 | US5887655 Wellbore milling and drilling |
| 03/30/1999 | US5887654 Method for performing downhole functions |
| 03/23/1999 | US5884716 Constant bottom contact thruster |
| 03/23/1999 | US5884708 Normally closed retainer valve with fail-safe pump through capability |
| 03/23/1999 | US5884707 Normally closed retainer valve with fail-safe pump through capability |
| 03/23/1999 | US5884704 Methods of completing a subterranean well and associated apparatus |
| 03/23/1999 | US5884703 Normally closed retainer valve with fail-safe pump through capability |
| 03/23/1999 | US5884702 Liner assembly and method |
| 03/18/1999 | WO1999013196A1 Casing filling and circulating apparatus |
| 03/17/1999 | EP0901561A1 A hydraulic device to be connected in a pipe string |
| 03/17/1999 | EP0901559A1 Multicut window mill |
| 03/17/1999 | CN1210934A Method and apparatus for conveying logging tool through earth formation |
| 03/16/1999 | US5881824 Bottomhole assembly orienting sub |
| 03/16/1999 | US5881816 Packer mill |
| 03/16/1999 | CA2152383C Assembly and process for drilling and completing multiple wells |
| 03/10/1999 | EP0900914A2 Method and apparatus for conveying a logging tool through an earth formation |
| 03/10/1999 | EP0900317A1 Apparatus and method for downhole drilling communications |
| 03/10/1999 | EP0772725B1 Method of installing a whipstock |
| 03/10/1999 | EP0769092B1 Hydraulic shifting tool for sliding sleeves |
| 03/09/1999 | US5878818 Mechanical set anchor with slips pocket |
| 03/09/1999 | US5878815 Assembly and process for drilling and completing multiple wells |
| 03/02/1999 | US5875851 Static wellhead plug and associated methods of plugging wellheads |
| 02/25/1999 | WO1999009291A1 Method and apparatus for moving a piston |
| 02/25/1999 | CA2300087A1 Method and apparatus for moving a piston |
| 02/24/1999 | EP0898048A2 Slip for use in a subterranean well |
| 02/24/1999 | EP0898046A2 Method and apparatus for releasably connecting a wireline to a downhole tool |
| 02/24/1999 | CN1208809A Formation data sensing with deployed remote sensors during well drilling |
| 02/20/1999 | CA2245154A1 Slip having passageway for lines therethrough |
| 02/18/1999 | WO1998038411A3 Apparatus for use in drilling operations |
| 02/16/1999 | US5871052 Apparatus and method for downhole tool deployment with mud pumping techniques |
| 02/16/1999 | US5871051 Method and related apparatus for retrieving a rotary pump from a wellbore |
| 02/16/1999 | US5871050 Well completion method |
| 02/10/1999 | EP0895561A1 Method and apparatus for remote control of multilateral wells |
| 02/09/1999 | US5868201 Computer controlled downhole tools for production well control |
| 02/04/1999 | WO1999005478A2 Flow measurement mandrel |
| 02/04/1999 | WO1999005390A1 Releasable connector assembly for a perforating gun |
| 02/04/1999 | WO1998050680A3 Monitoring of downhole parameters and tools utilizing fiber optics |
| 02/02/1999 | US5865255 Full bore nipple and associated lock mandrel therefor |
| 02/02/1999 | US5865252 Method of completing a well |
| 01/28/1999 | WO1999004173A1 Hydraulic fluid actuator with metal to metal seals |
| 01/28/1999 | WO1999004135A1 Deformed multiple well template and process of use |
| 01/28/1999 | CA2302376A1 Hydraulic fluid actuator with metal to metal seals |
| 01/27/1999 | EP0893573A2 Cable anchors |
| 01/26/1999 | US5864057 Method and apparatus for conducting well production tests |
| 01/26/1999 | US5862859 Side pocket mandrel orienting device with integrally formed locating slot |
| 01/26/1999 | CA2003434C Downhole chemical cutting tool |
| 01/20/1999 | EP0892148A2 Apparatus and method for achieving lock-out of a downhole tool |
| 01/19/1999 | US5861562 Flow measurement mandrel |
| 01/19/1999 | CA2104534C Retrievable whipstock |
| 01/13/1999 | EP0890013A1 Monobore riser bore selector |
| 01/12/1999 | US5857524 Liner hanging, sealing and cementing tool |
| 01/12/1999 | US5857521 Method of using a retrievable screen apparatus |
| 01/07/1999 | EP0888491A1 Hydraulic sliding side-door sleeve |
| 01/07/1999 | EP0888490A2 Mill for wellbore milling operations |
| 12/22/1998 | US5850879 Between a down hole well tool and surface equipment |
| 12/17/1998 | WO1998057028A1 Casing annulus remediation system |
| 12/16/1998 | EP0884451A2 Cable anchor assembly |
| 12/16/1998 | EP0884450A2 Apparatus operatively positionable within a subterranean well |
| 12/15/1998 | US5848646 Well completion apparatus for use under pressure and method of using same |
| 12/10/1998 | WO1998055731A1 Electro-hydraulic well tool actuator |
| 12/09/1998 | EP0882871A2 Formation data sensing with deployed remote sensors during well drilling |