| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 05/30/1989 | US4834185 Method and apparatus for manipulating a well bore liner |
| 05/30/1989 | US4834184 Drillable, testing, treat, squeeze packer |
| 05/30/1989 | US4834176 Well valve |
| 05/30/1989 | US4834175 Hydraulic versa-trieve packer |
| 05/30/1989 | US4834139 Radial seal hydraulic coupler |
| 05/23/1989 | US4832381 Seal |
| 05/23/1989 | US4832129 Multi-position tool and method for running and setting a packer |
| 05/23/1989 | US4832128 Wellhead assembly for injection wells |
| 05/23/1989 | US4832126 Diverter system and blowout preventer |
| 05/23/1989 | US4832125 Wellhead hanger and seal |
| 05/23/1989 | US4832120 Inflatable tool for a subterranean well |
| 05/23/1989 | CA1254596A1 Pitless adaptor |
| 05/23/1989 | CA1254506A1 Wireline set/tubing retrievable bridge plug |
| 05/23/1989 | CA1254504A1 Well cementing apparatus |
| 05/23/1989 | CA1254502A1 Gravel packer |
| 05/17/1989 | EP0316071A2 Wellhead structure |
| 05/16/1989 | US4830541 Suction-type ocean-floor wellhead |
| 05/10/1989 | EP0315124A1 Plug for rock consolidation |
| 05/09/1989 | US4828293 Wellhead slip and seal assembly |
| 05/09/1989 | US4828033 Apparatus and method for treatment of wells |
| 05/09/1989 | US4828025 Blowout control means |
| 05/09/1989 | US4828024 Diverter system and blowout preventer |
| 05/09/1989 | CA1253795A1 Method and apparatus for treating down hole equipment from corrosion in production well |
| 05/09/1989 | CA1253680A2 Method of cementing a subterranean zone |
| 05/03/1989 | EP0205367B1 Under pressure inflatable device for obturating a conduit comprising a self-clamping device for reinforced layers |
| 05/03/1989 | CN2036993U Self-closed type confining device for water-filling well |
| 05/03/1989 | CN1032667A Plugging agent for exploration drilling |
| 05/02/1989 | US4826357 Device for the internal occlusion of tubular foundation piles |
| 05/02/1989 | US4826216 Well housing and landing shoulder |
| 05/02/1989 | US4825953 Well servicing system |
| 05/02/1989 | US4825948 Remotely variable multiple bore ram system and method |
| 05/02/1989 | US4825945 Wellhead valve |
| 05/02/1989 | US4825938 Rotating blowout preventor for drilling rig |
| 05/02/1989 | CA1253437A1 Metal casing hanger seal with expansion slots |
| 04/26/1989 | EP0192704B1 Oilfield closing device operating system |
| 04/25/1989 | US4823882 Multiple-set packer and method |
| 04/25/1989 | US4823879 Guidelineless reentry system with nonrotating funnel |
| 04/25/1989 | US4823878 Guidelineless reentry system with fixed rollers |
| 04/25/1989 | US4823871 Hanger and seal assembly |
| 04/25/1989 | US4823594 Container for a fluid to be tested under pressure |
| 04/18/1989 | US4822212 Subsea template and method for using the same |
| 04/18/1989 | US4821817 Actuator for an appliance associated with a ducted body, especially a drill rod |
| 04/18/1989 | US4821799 Grease injection control system |
| 04/13/1989 | DE3739533C1 Rotary preventer for drilling rigs as pressure-maintaining rotary leadthrough transmission for the drill string |
| 04/13/1989 | DE3733365A1 Process and apparatus for introducing a liquid and/or gaseous medium into a piece of soil |
| 04/12/1989 | EP0311585A2 Apparatus and method for improving the integrity of coupling sections in high performance tubing and casing |
| 04/12/1989 | CN1032378A Method and implements for retarding subsiding of earth surface above coal mine |
| 04/11/1989 | US4819967 Conductor tieback connector |
| 04/11/1989 | US4819727 Adding pumpable gel plug, solididying, cementing |
| 04/11/1989 | US4819726 Method for indicating the position of a cement wiper plug prior to its bottomhole arrival |
| 04/11/1989 | US4819723 Injection of alkali metal silicate in hydrocarbon; breaking emulsion adjacent well bore with microwave energy |
| 04/11/1989 | CA1252387A1 Method and apparatus for connecting a tubular element to an underwater wellhead |
| 04/11/1989 | CA1252386A1 Device for placing, activating and connecting the modules of a submerged oil producing unit |
| 04/11/1989 | CA1252385A1 Subsea wireline lubricator |
| 04/11/1989 | CA1252384A1 Wellhead connecting apparatus |
| 04/06/1989 | WO1989003002A1 Connector for fluid carrying conduits |
| 04/05/1989 | CN2035380U Automatic control inner-tube sealing device |
| 04/04/1989 | US4818146 Wellhead and conductor stabilized by a cable and anchor system |
| 04/04/1989 | US4817992 Joining two pipes or like structures together |
| 04/04/1989 | US4817724 Diverter system test tool and method |
| 04/04/1989 | US4817719 Method for suspending wells |
| 04/04/1989 | US4817669 Subsea production |
| 03/28/1989 | US4815770 Subsea casing hanger packoff assembly |
| 03/28/1989 | US4815538 Wash tool for well having perforated casing |
| 03/28/1989 | US4815295 Valve actuator system for controlling valves |
| 03/21/1989 | US4813495 Method and apparatus for deepwater drilling |
| 03/21/1989 | US4813486 Retractable slip assembly |
| 03/15/1989 | EP0161261B1 Cylindrical gate valve apparatus and method |
| 03/15/1989 | CN1031742A Rotary-track clamping-bush type packer |
| 03/14/1989 | US4811959 Layered rings, asbestos yarn impregnated with elastomer and wrapped with tfe-propylene polymer |
| 03/14/1989 | US4811799 Banjo box and blooie line spool |
| 03/14/1989 | US4811784 Running tool |
| 03/14/1989 | CA1251035A1 Methods for stabilizing fines contained in subterranean formations |
| 03/08/1989 | EP0306306A1 Sub-surface release for plug assembly |
| 03/08/1989 | EP0306145A1 Caisson tower platform and method of setting same |
| 03/08/1989 | EP0306127A2 Subsea casing hanger packoff assembly |
| 03/07/1989 | US4809989 Coil spring supported sealing element and device |
| 03/07/1989 | US4809952 System for remote anchoring and tensioning of an elongate element |
| 03/07/1989 | US4809784 Tool for underwater connections on an oil production station |
| 03/07/1989 | US4809781 Method for selectively plugging highly permeable zones in a subterranean formation |
| 03/07/1989 | US4809780 Method for sealing thief zones with heat-sensitive fluids |
| 03/07/1989 | US4809776 For use in a well casing |
| 03/01/1989 | EP0305240A1 Method and device for modifying the transmission coefficient of the energy created by a borehole's seismic source towards geological formations |
| 03/01/1989 | CN2033443U Well sealing adjustable automatic drilling mud device with double seal |
| 03/01/1989 | CN2033442U Cone sealing up type casting sealer |
| 02/28/1989 | US4807705 Casing hanger with landing shoulder seal insert |
| 02/28/1989 | US4807701 Method for thermal stimulation of a subterranean reservoir and apparatus therefor |
| 02/28/1989 | US4807700 Wireline downhole annulus valve |
| 02/28/1989 | CA1250521A1 Method and apparatus for sealing a well casing |
| 02/28/1989 | CA1250520A1 Dual string tension - set, tension-release well packer |
| 02/23/1989 | WO1989001562A1 Cementing method and arrangement |
| 02/22/1989 | CN1031282A Method and device for improving coefficient of transmission to geological formations of energy created by well seismic source |
| 02/21/1989 | US4806114 Underwater electrically conductive coupling |
| 02/21/1989 | US4805699 Method and apparatus for setting, unsetting, and retrieving a packer or bridge plug from a subterranean well |
| 02/21/1989 | US4805698 For providing electrical power |
| 02/21/1989 | CA1250281A1 Cement mixing process and apparatus |
| 02/21/1989 | CA1250228A1 Liner hanger with brass packer |
| 02/21/1989 | CA1250227A1 Marine riser structural core connector |
| 02/21/1989 | CA1250226A1 Subsea flowline connector |
| 02/14/1989 | US4804045 Oil and gas well diversionary spool assembly |