| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/25/2005 | US6845815 Temporary abandonment cap |
| 01/25/2005 | CA2288377C Launching tool for objects downhole |
| 01/25/2005 | CA2285853C Bolt-on well adapter |
| 01/20/2005 | WO2005005770A1 Systems and methods for constructing subsea production wells |
| 01/20/2005 | WO2005005764A2 Spiral tubular tool and method |
| 01/20/2005 | WO2004094775A3 Screen for blanking plug |
| 01/20/2005 | US20050014655 Aqueous solution of borate ions, alkali, alkali earth and annonium ions and sugar; antiswelling mixture for well bores |
| 01/20/2005 | US20050012036 Providing a light cell in a wellbore |
| 01/20/2005 | US20050011678 Method and device for injecting a fluid into a formation |
| 01/20/2005 | US20050011650 Method and apparatus for expanding and separating tubulars in a wellbore |
| 01/20/2005 | US20050011642 Stuffing box for progressing cavity pump drive |
| 01/20/2005 | US20050011641 Wellhead |
| 01/19/2005 | EP1497529A1 Method to form a barrier in a reservoir with a magnetorheological fluid |
| 01/19/2005 | EP1497528A2 Split carrier annulus seal assembly for wellhead systems |
| 01/19/2005 | EP1497527A1 Method of drilling with magnetorheological fluid |
| 01/19/2005 | CN2672284Y Oil pipe blocking device |
| 01/19/2005 | CN2672283Y Controller of blowout preventer switch |
| 01/19/2005 | CN1566613A Hydraulic fracturing process for generating multiple fractures |
| 01/19/2005 | CN1566254A Cement fly ash profile control agent for plugging of oil and water well |
| 01/19/2005 | CN1566011A Impervious oil well cement |
| 01/18/2005 | US6843480 Seal ring for well completion tools |
| 01/18/2005 | US6843463 Pressure regulated slip ram on a coil tubing blowout preventer |
| 01/18/2005 | US6843331 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 01/18/2005 | US6843321 Intervention device for a subsea well, and method and cable for use with the device |
| 01/18/2005 | US6843315 Compression set, large expansion packing element for downhole plugs or packers |
| 01/14/2005 | CA2473476A1 Isolation of subterranean zones |
| 01/13/2005 | WO2005003648A1 A method of constructing a geothermal heat exchanger |
| 01/13/2005 | WO2005003617A1 A sealing device for temporarily closing a well or a pipe |
| 01/13/2005 | WO2004044368A3 Orientation system for a subsea well |
| 01/13/2005 | WO2003087520A3 Apparatus and method of detecting interfaces between well fluids and for detecting the launch of a device in oilfield applications |
| 01/13/2005 | US20050006148 Assembly for drilling low pressure formation |
| 01/13/2005 | US20050006107 One trip string tensioning and hanger securing method |
| 01/13/2005 | US20050006103 Adapters for double-locking casing mandrel and method of using same |
| 01/13/2005 | US20050006098 Method and apparatus for treating a well |
| 01/13/2005 | US20050006087 Variable bore ram |
| 01/13/2005 | US20050006020 Method of hardening a fluid mass |
| 01/13/2005 | US20050005966 Shut-off device |
| 01/13/2005 | CA2532914A1 A method of constructing a geothermal heat exchanger |
| 01/13/2005 | CA2529728A1 A sealing device for temporarily closing a well or a pipe |
| 01/13/2005 | CA2527860A1 Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications |
| 01/12/2005 | EP1496194A2 Method and apparatus for treating a well |
| 01/12/2005 | EP1496193A1 Method and apparatus for selective release of cementing plugs downhole |
| 01/12/2005 | CN2670591Y Pin fixed cementing front separate plug |
| 01/12/2005 | CN2670590Y Self-sealing rubber plug of casing drilling and well cementation |
| 01/12/2005 | CN2670589Y Cemtn plug positioner |
| 01/12/2005 | CN2670588Y Offset sealed blowout preventer of pumping well hole |
| 01/12/2005 | CN2670587Y Safety hole cap |
| 01/12/2005 | CN2670586Y Security anti-blow-out stuffnig box on hole of sucking well |
| 01/12/2005 | CN1564903A Contractable and expandable tubular wellbore system |
| 01/12/2005 | CN1563663A Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement |
| 01/12/2005 | CN1563259A Block up and concoction agnet of inorganic delayed siliceous gel |
| 01/11/2005 | US6840494 Gate valve with flow-through gate |
| 01/11/2005 | US6840328 Anti-extrusion apparatus and method |
| 01/11/2005 | US6840327 Annular pressure spool |
| 01/11/2005 | US6840323 Tubing annulus valve |
| 01/11/2005 | CA2351095C Combined sealing and gripping unit for retrievable packers |
| 01/11/2005 | CA2350149C Inflatable packer with feed-thru conduits |
| 01/11/2005 | CA2139583C Remote control for a plug-dropping head |
| 01/10/2005 | CA2434865A1 Apparatus for use in settling slips on a drill rig |
| 01/06/2005 | WO2005001237A1 Downhole activatable annular seal assembly |
| 01/06/2005 | WO2005001233A2 Improved horizontal tree assembly |
| 01/06/2005 | WO2005001232A2 Determination of thermal properties of a formation |
| 01/06/2005 | WO2004025068A3 System and method for well workover with horizontal tree |
| 01/06/2005 | WO2003027430A3 Sealing assembly with electroactive polymers |
| 01/06/2005 | US20050003968 Drilling fluids |
| 01/06/2005 | US20050001427 Low profile connector |
| 01/06/2005 | US20050000698 High pressure rotating drilling head assembly with hydraulically removable packer |
| 01/06/2005 | US20050000695 Filling and circulating apparatus for subsurface exploration |
| 01/06/2005 | US20050000693 Release tool for coiled tubing |
| 01/06/2005 | US20050000692 Spiral tubular tool and method |
| 01/06/2005 | US20050000691 Methods and apparatus for handling and drilling with tubulars or casing |
| 01/06/2005 | US20050000690 cementing in a subterranean formation penetrated by a well bore that comprises providing a cement composition comprising water, a cement, a strength-retrogression additive, and an acid like ethylenediamine tetra acetic acid, |
| 01/06/2005 | US20050000687 Device for performing a downhole operation |
| 01/06/2005 | US20050000686 Contractable and expandable tubular wellbore system |
| 01/05/2005 | CN2668850Y Well-control pressure-testing joint |
| 01/05/2005 | CN2668847Y Expanding device for solid expanding tube |
| 01/05/2005 | CN2668841Y Drilling and fixing well throttle device |
| 01/05/2005 | CN2668840Y Acidifying pressing-crack packaging device |
| 01/05/2005 | CN2668839Y Oil-well repair-operation blowout preventor |
| 01/05/2005 | CN2668838Y Semi-full blowout preventer with self blowout-preventing function for use in oil-field |
| 01/05/2005 | CN2668837Y Hydraulic rotary blowout preventer |
| 01/05/2005 | CN2668832Y Side-drilling-well hydraulic tail-pipe suspension device |
| 01/05/2005 | CN1560429A Disision method of plugging water for integral regulating profile of water flood oil field |
| 01/05/2005 | CN1560428A Disision method of water plugging for bottom-water oil reservoir well |
| 01/05/2005 | CN1560427A Sand consolidation water agent plugging agent |
| 01/05/2005 | CN1560179A Sealing blocking agent for blasthole |
| 01/04/2005 | CA2383683C Well completion method and apparatus |
| 01/04/2005 | CA2379094C Fluid filled drill pipe plug |
| 01/04/2005 | CA2376827C Composition and method for sealing an annular space between a well bore and a casing |
| 01/04/2005 | CA2286957C Caged slip system and release methods |
| 01/04/2005 | CA2206351C Downhole lubricator and method |
| 12/30/2004 | US20040263350 Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |
| 12/30/2004 | US20040262551 Wellhead production blowout preventer |
| 12/30/2004 | US20040262012 Multi-lock adapters for independent screwed wellheads and methods of using same |
| 12/30/2004 | US20040262010 Horizontal tree assembly |
| 12/30/2004 | US20040262009 Horizontal spool tree wellhead system and method |
| 12/30/2004 | US20040262003 Providing a hardenable, low density sealing comprising a hardenable furan liquid resin mixture, an organosilane coupling agent, a cationic surfactant, and hollow microspheres; placing sealing formulation in well bore; allowing to harden into an impermeable mass |
| 12/30/2004 | US20040261998 Borehole stabilisation |
| 12/30/2004 | US20040261992 Sample extraction system for boreholes |
| 12/30/2004 | US20040261991 Anti-rotation method and apparatus for limiting rotation of cementing plugs |