| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 08/29/1989 | US4862426 Method and apparatus for operating equipment in a remote location |
| 08/29/1989 | US4860826 Apparatus for sealing a tubing string in a high pressure wellbore |
| 08/23/1989 | CN1034973A Method of isolation of troublesorne zones in well with profile patch liners |
| 08/22/1989 | US4859196 Underwater electric connector |
| 08/22/1989 | US4858882 Blowout preventer with radial force limiter |
| 08/22/1989 | US4858692 Cementing apparatus and method for execution of cementing operation |
| 08/22/1989 | US4858687 Non-rotating plug set |
| 08/22/1989 | CA1258621A1 Wellhead sealing assembly |
| 08/16/1989 | EP0327752A2 Wellhead slip & seal assembly |
| 08/15/1989 | US4856594 Wellhead connector locking device |
| 08/15/1989 | US4856592 Annulus cementing and washout systems for wells |
| 08/15/1989 | US4856583 Apparatus for treating well bores |
| 08/15/1989 | CA1258422A1 Well packer |
| 08/15/1989 | CA1258366A1 High temperature well cementing methods and compositions |
| 08/10/1989 | WO1989007198A1 Sea water well and aquaculture preserve, and the combination with a power generation system |
| 08/10/1989 | WO1989007190A1 A method for sealing an elongated, hollow cavity, and a device for carrying out the method |
| 08/09/1989 | EP0327405A1 Well cementing stage tool and method and device for alleviating a hydraulic lock |
| 08/08/1989 | US4854778 Caisson tower platform and method of setting same |
| 08/08/1989 | US4854615 Metal sealed joint for large diameter rocket motor casings |
| 08/08/1989 | US4854386 Method and apparatus for stage cementing a liner in a well bore having a casing |
| 08/08/1989 | US4854383 Manifold arrangement for use with a top drive power unit |
| 08/08/1989 | CA1258278A1 Connector, ratcheting type |
| 08/03/1989 | DE3802286A1 Borehole plug with double piston |
| 08/02/1989 | EP0326493A1 Well head lubricator bleed valve for a hydrocarbon deposit or a subterranean gas reservoir |
| 08/02/1989 | EP0269630B1 Process for strengthening geological formations |
| 08/01/1989 | US4852654 Wireline hydraulic isolation packer system |
| 08/01/1989 | US4852649 Packer seal means and method |
| 08/01/1989 | US4852648 Well installation in which electrical current is supplied for a source at the wellhead to an electrically responsive device located a substantial distance below the wellhead |
| 08/01/1989 | US4852611 Wellhead connection of hydraulic control lines |
| 08/01/1989 | US4852394 Anti-extrusion sealing means |
| 07/27/1989 | WO1989006739A1 Method of constructing a well |
| 07/27/1989 | WO1989006738A1 A method and apparatus for repairing casing and the like |
| 07/27/1989 | WO1989006731A1 Injection device for introducing fluids under pressure into cracked structures |
| 07/26/1989 | EP0325541A1 Apparatus and process for isolating productive intervals in a well |
| 07/26/1989 | EP0203003B1 Remotely-controlled assembling device for two items |
| 07/26/1989 | CN1034237A Subsea template and method for using the same |
| 07/25/1989 | US4850702 Method of blending materials |
| 07/25/1989 | US4850432 Manual port closing tool for well cementing |
| 07/25/1989 | US4850428 Plastic well with plastic well adapter |
| 07/18/1989 | US4848777 Pressure energized/pressure intensified casing seal |
| 07/18/1989 | US4848480 Method and apparatus for wire line protection in a well |
| 07/18/1989 | US4848472 Insert choke and control module therefor |
| 07/18/1989 | US4848464 Injection solidifiable gel mixture |
| 07/18/1989 | US4848462 Rotatable liner hanger |
| 07/18/1989 | US4848459 Apparatus for installing a liner within a well bore |
| 07/18/1989 | US4848458 Lockable well cap |
| 07/18/1989 | US4848457 Annulus sliding sleeve valve |
| 07/18/1989 | US4848404 Hydraulic valve |
| 07/18/1989 | US4848401 Isolation chamber valve |
| 07/13/1989 | DE3801824C1 Method and apparatus for the trenchless laying of supply lines |
| 07/11/1989 | US4846647 Air circulation and exhaust control system for commercial ovens |
| 07/11/1989 | US4846278 Borehole plug and method |
| 07/11/1989 | CA1257197A1 Well tool for testing or treating a well |
| 07/04/1989 | US4844839 In situ treatment and analysis of wastes |
| 07/04/1989 | US4844807 Insitu hazardous waste treating apparatus and method of using same |
| 07/04/1989 | US4844511 Tubular connector |
| 07/04/1989 | US4844510 Tubular connector |
| 07/04/1989 | US4844406 Blowout preventer |
| 07/04/1989 | US4844166 Method and apparatus for recompleting wells with coil tubing |
| 07/04/1989 | US4844165 TFL assembly for a dual diameter flow-line/riser system and flow-line/riser system for use with the assembly |
| 07/04/1989 | US4844164 Injecting a water solution of lime and compound that increases solubility of lime |
| 07/04/1989 | US4844163 Closing pores; enhanced oil recovery |
| 07/04/1989 | US4844160 Parking mandrel |
| 07/04/1989 | US4844154 Well packer |
| 07/04/1989 | CA1256793A1 Casing hanger running tool |
| 06/27/1989 | US4842307 Wellhead load supporting system |
| 06/27/1989 | US4842082 Variable outside diameter tool for use in pikewells |
| 06/27/1989 | US4842070 Procedure for improving reservoir sweep efficiency using paraffinic or asphaltic hydrocarbons |
| 06/27/1989 | US4842069 Apparatus and method for cementing a liner in a well bore |
| 06/27/1989 | US4842068 Process for selectively treating a subterranean formation using coiled tubing without affecting or being affected by the two adjacent zones |
| 06/27/1989 | US4842066 Method for isolation of intake beds in drill holes and a device for carrying same into effect |
| 06/27/1989 | US4842062 Hydraulic lock alleviation device, well cementing stage tool, and related methods |
| 06/27/1989 | US4842061 Casing hanger packoff with C-shaped metal seal |
| 06/27/1989 | US4842060 Plastic well with plastic well adapter |
| 06/27/1989 | US4842057 Retrievable gravel packer and retrieving tool |
| 06/21/1989 | EP0321035A2 Low-viscosity cement composition |
| 06/21/1989 | CN2039738U Water-compression well packer |
| 06/20/1989 | US4840517 Soil displacement tools |
| 06/20/1989 | US4840346 Apparatus for sealing a well blowout |
| 06/20/1989 | US4840231 Method and apparatus for setting an inflatable packer |
| 06/20/1989 | CA1256019A1 Mechanical drive packer |
| 06/14/1989 | EP0320135A1 Method and apparatus for operating equipment in a remote location |
| 06/14/1989 | CN2039344U Mud filling controller of oil-gas well |
| 06/13/1989 | US4838699 Cement mixing process |
| 06/13/1989 | US4838352 Process for plugging subterranean formations |
| 06/13/1989 | US4838349 Apparatus for testing selected zones of a subterranean bore |
| 06/13/1989 | US4838348 Well packer brake |
| 06/13/1989 | US4838079 Multi-channel pipe for monitoring groundwater |
| 06/13/1989 | CA1255584A1 Packer and service tool assembly |
| 06/07/1989 | CN2038952U Electric cable wellhead sealing device |
| 06/06/1989 | US4836579 Subsea casing hanger suspension system |
| 06/06/1989 | US4836299 Sonic method and apparatus for installing monitor wells for the surveillance and control of earth contamination |
| 06/06/1989 | US4836289 Method and apparatus for performing wireline operations in a well |
| 06/06/1989 | US4836288 Casing hanger and packoff running tool |
| 06/06/1989 | US4836279 Non-rotating plug |
| 06/06/1989 | US4836278 Apparatus for isolating a plurality of vertically spaced perforations in a well conduit |
| 06/06/1989 | CA1255265A1 Dry pellet dispensing device for wells |
| 06/06/1989 | CA1255208A1 Retrievable packoff |
| 05/31/1989 | CN2038544U High pressure sealing device for deep well |
| 05/30/1989 | US4834194 Method and apparatus for detection of volatile soil contaminants in situ |