| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 04/28/1999 | EP0911485A2 Formation evaluation testing apparatus and method |
| 04/28/1999 | EP0910725A1 Wellbores utilizing fiber optic-based sensors and operating devices |
| 04/28/1999 | CN2316453Y Drilling rod self-packer |
| 04/27/1999 | US5897094 BOP with improved door connectors |
| 04/27/1999 | US5896927 Stabilizing and cementing lateral well bores |
| 04/27/1999 | US5896926 Packer type groundwater sampling system and water sampling method |
| 04/27/1999 | CA2077167C Wellhead isolation tool and method of use |
| 04/22/1999 | WO1999019601A1 An apparatus and a method for launching plugs |
| 04/22/1999 | WO1999019600A1 Method for drilling a well in unconsolidated and/or abnormally pressured formations |
| 04/22/1999 | CA2306365A1 An apparatus and a method for launching plugs |
| 04/21/1999 | EP0804678B1 Method of creating a casing in a borehole |
| 04/21/1999 | CN2315290Y Thermal production packer of marmen spring |
| 04/21/1999 | CN1214756A Method and sytsem for monitoring characteristic of earth formation in well |
| 04/20/1999 | US5895619 Method for casting a bidirectional foam pig |
| 04/20/1999 | US5894897 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 04/15/1999 | WO1999018329A1 Slimbore subsea completion system and method |
| 04/15/1999 | WO1999018323A1 Rotating drilling head |
| 04/14/1999 | EP0908600A2 Formation testing apparatus |
| 04/14/1999 | EP0907821A1 Christmas tree |
| 04/14/1999 | EP0599964B1 Pack-off tool |
| 04/14/1999 | CN2314089Y Apparatus for preventing formation testing from blowout |
| 04/13/1999 | US5893417 Wireline lubrication wiper |
| 04/13/1999 | US5893413 Hydrostatic tool with electrically operated setting mechanism |
| 04/07/1999 | EP0614505B1 Template and process for drilling and completing multiple wells |
| 04/07/1999 | CN1042859C Apparatus for testing shear thickening plugging fluid |
| 04/07/1999 | CN1042848C Temporary plugging technique for injection distribution working construction of oil field |
| 04/06/1999 | US5890698 Valve having pressure equalizing conduit |
| 04/06/1999 | US5890541 BOP isolation test tool |
| 04/06/1999 | US5890538 Reverse circulation float equipment tool and process |
| 04/06/1999 | US5890537 Wiper plug launching system for cementing casing and liners |
| 04/06/1999 | US5890535 Diverter flow line seal |
| 04/06/1999 | US5890534 Variable injector |
| 04/01/1999 | WO1999015760A1 Production fluid control device for oil/gas wells |
| 04/01/1999 | WO1999015758A2 Subsea drill fluid pumping and treatment system for deepwater drilling |
| 04/01/1999 | DE19747468C1 Pipe clamp for manipulating double pipe strings |
| 03/31/1999 | EP0905349A1 Hydraulic wiper plug launcher |
| 03/31/1999 | CN2312322Y Oil well casing sealing device |
| 03/31/1999 | CN2312321Y Dual strilling well head equipment |
| 03/30/1999 | US5887660 Liner packer assembly and method |
| 03/30/1999 | US5887658 OIL well production string hanger |
| 03/30/1999 | US5887657 Pressure test method for permanent downhole wells and apparatus therefore |
| 03/25/1999 | WO1999014461A2 A plug for use in wellbore operations, an apparatus for receiving said plug, a plug landing system and a method for cementing tubulars in a wellbore |
| 03/24/1999 | EP0903462A1 Method of maintaining the integrity of a well cementing sheath |
| 03/24/1999 | CN2311601Y Plunger type large pump snubbing serving apparatus |
| 03/23/1999 | US5884715 Method and apparatus for injecting drilling waste into a well while drilling |
| 03/23/1999 | US5884706 Horizontal subsea tree pressure compensated plug |
| 03/23/1999 | US5884702 Liner assembly and method |
| 03/23/1999 | US5884701 Dual downhole injection system utilizing coiled tubing |
| 03/23/1999 | US5884699 Retrievable torque-through packer having high strength and reduced cross-sectional area |
| 03/18/1999 | WO1999013198A1 Close proximity wellheads |
| 03/18/1999 | WO1999013196A1 Casing filling and circulating apparatus |
| 03/17/1999 | EP0902161A2 Improved variable bore ram packer for a ram type blowout preventer |
| 03/16/1999 | US5881815 Drilling, production, test, and oil storage caisson |
| 03/16/1999 | US5881807 Injector for injecting a tracer into an oil or gas reservior |
| 03/16/1999 | CA2215652A1 Chemical treatment device for well and pipeline applications |
| 03/16/1999 | CA2152383C Assembly and process for drilling and completing multiple wells |
| 03/11/1999 | WO1999011904A1 Coiled tubing completion system |
| 03/11/1999 | CA2245405A1 Improved variable bore ram packer for a ram type blowout preventer |
| 03/10/1999 | EP0900320A1 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
| 03/10/1999 | CN2310152Y Centring polished rod sealer |
| 03/10/1999 | CN1210195A Heat-resistant packering agent for oil bearing reservoirs |
| 03/09/1999 | US5879010 Seal assembly with mechanically joined anti-extrusion rings |
| 03/09/1999 | US5878816 Adjustable casing hanger |
| 03/09/1999 | US5878815 Assembly and process for drilling and completing multiple wells |
| 03/09/1999 | US5878812 Misaligning wellhead system |
| 03/09/1999 | CA2002562C Wireline blowout preventer having mechanical and hydraulic sealing |
| 03/03/1999 | EP0899418A1 Modifying subterranean strata |
| 03/03/1999 | EP0899417A1 Method of modifying subterranean strata properties |
| 03/03/1999 | EP0899416A1 Method of sealing conduits in lateral well bores |
| 03/03/1999 | EP0899415A1 Method of sealing pipe string in well bores |
| 03/03/1999 | EP0899317A1 Well drilling fluid |
| 03/02/1999 | US5875852 Apparatus and associated methods of producing a subterranean well |
| 03/02/1999 | US5875851 Static wellhead plug and associated methods of plugging wellheads |
| 03/02/1999 | US5875850 Universal pipe and tubing injection apparatus and method |
| 03/02/1999 | US5875849 Apparatus and method for recompleting wells with coiled tubing |
| 03/02/1999 | US5875846 Methods of modifying subterranean strata properties |
| 03/02/1999 | US5875845 Methods and compositions for sealing pipe strings in well bores |
| 03/02/1999 | US5875844 Methods of sealing pipe strings in well bores |
| 03/02/1999 | US5875841 Oil well blow-out preventer |
| 02/24/1999 | EP0898050A1 Methods and compositions for sealing pipe strings in well bores |
| 02/24/1999 | EP0898049A1 Remedial well bore sealing method |
| 02/24/1999 | EP0898048A2 Slip for use in a subterranean well |
| 02/24/1999 | CN1042253C Bentonite gel plugging agent |
| 02/23/1999 | US5873416 In an offshore structure designed to drill for/produce hydrocarbons |
| 02/23/1999 | US5873413 Methods of modifying subterranean strata properties |
| 02/23/1999 | CA2176296C Rotating rod string position adjusting device |
| 02/20/1999 | CA2245154A1 Slip having passageway for lines therethrough |
| 02/18/1999 | WO1998038411A3 Apparatus for use in drilling operations |
| 02/18/1999 | CA2245627A1 Methods of sealing pipe strings in well bores |
| 02/18/1999 | CA2245610A1 Well drilling fluids containing epoxy sealants and methods |
| 02/18/1999 | CA2245215A1 Method of sealing conduits in lateral well bores |
| 02/18/1999 | CA2245211A1 Methods of modifying subterranean strata properties |
| 02/18/1999 | CA2245205A1 Methods of modifying subterranean strata properties |
| 02/18/1999 | CA2245033A1 Remedial well bore sealing methods |
| 02/18/1999 | CA2245032A1 Methods and compositions for sealing pipe strings in well bores |
| 02/17/1999 | CN2307907Y Anti-backstop eccentric water distribution plug |
| 02/11/1999 | WO1999006668A1 A method of injecting drilling waste into a well while drilling |
| 02/10/1999 | EP0896125A2 Control module system for a subterranean well |
| 02/09/1999 | US5868523 For in-situ remediation of contaminated soil and ground water |
| 02/09/1999 | US5868204 Tubing hanger vent |