| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 02/20/1991 | EP0413428A1 Blowout preventer |
| 02/20/1991 | EP0413410A1 Location of tubular members |
| 02/20/1991 | CN2071699U Stuffing box of polish rod for thermal recovery |
| 02/19/1991 | US4993492 Method of inserting wireline equipment into a subsea well |
| 02/19/1991 | US4993489 Wellhead isolation tool |
| 02/19/1991 | US4993488 Well casing packers |
| 02/19/1991 | CA1280362C Whipstock packer assembly |
| 02/19/1991 | CA1280361C Adjustable cement head manifold |
| 02/14/1991 | DE3926133A1 Test line for rock permeability testing - has measurement bells and packers on tube sections with connecting lines to earth's surface |
| 02/14/1991 | CA2018260A1 Location of tubular members |
| 02/13/1991 | EP0412535A1 Tubing collar position sensing apparatus, and associated methods, for use with a snubbing unit |
| 02/13/1991 | CN2071248U Slurry filling device for well wall |
| 02/13/1991 | CN1049213A Method for fixing rocklayer of contain minerals in drilling well |
| 02/12/1991 | US4991654 A sliding sleeve |
| 02/12/1991 | US4991653 Wash tool |
| 02/12/1991 | US4991650 Wellhead isolation tool |
| 02/12/1991 | CA1280107C Foamed slurry generator |
| 02/10/1991 | CA2022770A1 Tubing collar position sensing apparatus, and associated methods, for use with a snubbing unit |
| 02/08/1991 | CA2022680A1 Device for measuring properties of underground water and method therefor |
| 02/06/1991 | EP0411967A1 Subsea protective housing |
| 02/06/1991 | EP0411260A2 Equipment for a drill string with a side entry sub and emergency release |
| 02/06/1991 | CN2070816U Packer used for injected steam |
| 02/05/1991 | US4989672 Packer locking apparatus |
| 02/04/1991 | WO1991002138A1 Apparatus for recovering a wellhead |
| 01/30/1991 | CN2070353U Blow-out preventer for smooth rod break out |
| 01/29/1991 | US4987956 Apparatus for use in drilling a well at an offshore location |
| 01/23/1991 | EP0409633A1 An actuator |
| 01/23/1991 | EP0409547A2 Inflatable straddle packer |
| 01/22/1991 | US4986511 Seal structure for elevated temperature service |
| 01/22/1991 | US4986361 Well casing flotation device and method |
| 01/22/1991 | US4986360 System for handling reeled tubing |
| 01/22/1991 | US4986359 Release apparatus and method for threaded conductor pipe |
| 01/22/1991 | CA1279259C Load carrying and hydraulic fluid transmission connecting device |
| 01/22/1991 | CA1279256C Rotating and supporting drive assembly for down hole rotary pumps |
| 01/17/1991 | DE3922379A1 Cut=off arrangement for artesian well - has shut=off valve in pipe packing which can be directly opened from sample extracting pipe above ground level |
| 01/17/1991 | DE3921949A1 Burner for burning gas given off from refuse dump - has burner head mounted telescopically over perforated pipe |
| 01/16/1991 | EP0275304B1 Calcium-free clear high density fluids |
| 01/16/1991 | CN1048579A Combined multifunctional oil wellhead assembly |
| 01/15/1991 | US4984830 Collet type connector |
| 01/15/1991 | US4984636 Geothermal wellhead repair unit |
| 01/15/1991 | US4984631 System and plug for plugging a conduit |
| 01/15/1991 | US4984527 Device for the remote assembly of two members |
| 01/15/1991 | CA1279004C Tubular connector |
| 01/08/1991 | US4982795 Method and apparatus for supporting one tubular member within another |
| 01/08/1991 | US4982787 Pipe wiper system |
| 01/07/1991 | CA2015966A1 Casing head connector |
| 01/06/1991 | CA2018366A1 Pressure compensating apparatus and method for chemical treatment of subterranean well bores |
| 01/02/1991 | EP0405951A1 A releasable connector |
| 01/02/1991 | EP0405734A2 Subsea hanger and running tool |
| 01/02/1991 | EP0405731A2 Annular seal |
| 01/02/1991 | CN2068580U Inclined well heads blow-out preventer |
| 01/01/1991 | US4981176 Anionic surfactants |
| 01/01/1991 | US4981174 Leakproof stuffing box with external lubrication for polish rod |
| 12/31/1990 | CA2016758A1 Annular seal |
| 12/28/1990 | CA2010533A1 Insulating support for tubing string |
| 12/27/1990 | EP0403707A1 Wireline blowout preventer having mechanical and hydraulic sealing |
| 12/25/1990 | US4979570 Inflatable tool with rib expansion support |
| 12/25/1990 | US4979566 Running tool for installing a casing hanger in a subsea tubular conductor |
| 12/25/1990 | US4979562 Float equipment including float collars and modular plugs for well operations |
| 12/19/1990 | EP0403025A2 Method of drilling and lining a borehole |
| 12/19/1990 | CN1010863B Well bore recompletion |
| 12/19/1990 | CA2018909A1 System and plug for plugging a conduit |
| 12/18/1990 | US4978147 In a well |
| 12/18/1990 | US4977959 Method of positioning of plugs or screens by horizontal drilling |
| 12/18/1990 | CA1277936C Microbial process for selectively plugging a subterranean formation |
| 12/14/1990 | CA2017433A1 Pipeline packer improvements |
| 12/12/1990 | CN1047686A High temp.-resisting temporary stopping agent in drilling well |
| 12/11/1990 | US4976458 Internal tieback connector |
| 12/11/1990 | US4976402 Manual blowout preventer with invertible rams |
| 12/11/1990 | US4976322 Method of construction of multiple-string wells |
| 12/11/1990 | US4976316 Well completion |
| 12/11/1990 | CA1277593C Annulus pressure operated ratchet device |
| 12/11/1990 | CA1277592C Method and system for attaching and removing equipment from a wellhead |
| 12/11/1990 | CA1277591C Rod locking device |
| 12/11/1990 | CA1277590C Disposal of produced formation fines during oil recovery |
| 12/10/1990 | WO1990015324A1 Method and device for in-situ measurement of ground heave characteristics |
| 12/10/1990 | CA2058981A1 Method and device for in-situ measurement of ground heave characteristics |
| 12/05/1990 | EP0400039A1 A method for sealing an elongated, hollow cavity, and a device for carrying out the method |
| 12/04/1990 | US4974880 Reduction bushings in the casing of production and injection wells |
| 12/04/1990 | US4974677 Profile control process for use under high temperature reservoir conditions |
| 12/04/1990 | US4974676 Ground subsiding wellhead |
| 12/04/1990 | CA1277230C Wellhead isolation tool |
| 12/04/1990 | CA1277228C Mechanical system and process for diversion acidizing treatment of oil formations |
| 11/29/1990 | WO1990014495A1 Actuable mechanism and control therefor |
| 11/28/1990 | CN1047326A Leakage-stopping composition |
| 11/27/1990 | US4972908 Packer arrangement |
| 11/27/1990 | US4972906 Method for selective plugging of a zone in a well |
| 11/27/1990 | US4972905 Releasable air vent pipe for use on water well covers |
| 11/27/1990 | US4972904 Geothermal well chemical injection system |
| 11/27/1990 | CA1276875C Liner screen tieback packer apparatus and method |
| 11/22/1990 | EP0398838A1 Injection tube with anchor effect |
| 11/22/1990 | EP0397870A1 Method of casing the production seam in a well |
| 11/22/1990 | EP0397716A1 Injection device for introducing fluids under pressure into cracked structures. |
| 11/20/1990 | US4971152 Method and apparatus for repairing well casings and the like |
| 11/20/1990 | US4971150 Flooding with steam or carbon dioxide for oil wells |
| 11/20/1990 | US4971149 Flush mount monitoring well cover |
| 11/20/1990 | US4971148 Flow diverter |
| 11/20/1990 | CA1276547C Inflatable well packers |
| 11/20/1990 | CA1276546C Coiled tubing hanger |
| 11/20/1990 | CA1276545C Plastic well adapter |