| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/25/2001 | CN2427621Y Short type well head used specially for screw pump |
| 04/24/2001 | US6220787 Ship type floating oil production system |
| 04/24/2001 | US6220363 Wellhead isolation tool and method of using same |
| 04/24/2001 | US6220362 Conduit and cable bypass for downhole tools |
| 04/24/2001 | US6220360 Downhole ball drop tool |
| 04/24/2001 | US6220351 System to lower the depth equipment in hydrocarbons wells |
| 04/24/2001 | US6220350 High strength water soluble plug |
| 04/24/2001 | US6220349 Low pressure, high temperature composite bridge plug |
| 04/24/2001 | US6220348 Retrievable bridge plug and retrieving tool |
| 04/24/2001 | CA2218030C Valve having pressure equalizing conduit |
| 04/19/2001 | WO2000077431A3 Expandable connector |
| 04/19/2001 | WO2000073622A8 Method for carrying out operations on petroleum and gas fields and deep-sea platform for realising the same |
| 04/19/2001 | DE19949247A1 Process for supporting unlined trial bores comprises inserting flexible tubing in the bore hole and using a medium to place the tubing under pressure so that the bore hole is supported by controlled radial pressure |
| 04/19/2001 | DE19909231C2 Wasserlösliche Copolymere auf AMPS-Basis und ihre Verwendung als Bohrhilfsmittel Water-soluble copolymers based on AMPS and their use as drilling aids |
| 04/18/2001 | EP1092078A1 Flying lead workover interface system |
| 04/18/2001 | CN2426915Y Float collar and float shoe |
| 04/18/2001 | CN2426914Y Integrated double-layer casing head |
| 04/18/2001 | CN2426913Y High-pressure rod less sealing device for pumping unit well head |
| 04/18/2001 | CN1292059A Compositions for use in well construction, repair and/or abandonment |
| 04/17/2001 | US6216799 Subsea pumping system and method for deepwater drilling |
| 04/17/2001 | US6216785 System for installation of well stimulating apparatus downhole utilizing a service tool string |
| 04/17/2001 | CA2220189C Primary and secondary seal assemblies with contacting convex surfaces |
| 04/12/2001 | WO2001025596A1 Method for processing the production layer in a bottom hole area, packer therefor and method for securing a packer inside the bottom of a hole |
| 04/12/2001 | WO2001025594A1 Method and plugging material for reducing formation fluid migration in wells |
| 04/12/2001 | WO2001025593A1 Subsea lubricator device and methods of circulating fluids in a subsea lubricator |
| 04/12/2001 | CA2388799A1 Method and packer for processing a productive formation in bottom-hole zone of a well, and method for fixing a packer inside a well |
| 04/11/2001 | EP1091087A2 Measurement port coupler and probe interface |
| 04/11/2001 | EP1090238A1 Seal |
| 04/11/2001 | CN2426522Y 地锚 Anchor |
| 04/11/2001 | CN2426521Y Anchoring packer capable of flushing |
| 04/11/2001 | CN1290804A Method for preparing controlled size microgel |
| 04/10/2001 | US6214159 Curable epoxide composition and its use |
| 04/10/2001 | US6213217 Gas operated apparatus and method for maintaining relatively uniformed fluid pressure within an expandable well tool subjected to thermal variants |
| 04/10/2001 | US6213215 System, vessel, seabed installation and method for producing oil or gas |
| 04/10/2001 | US6213212 Spherical stemming plug and method of use |
| 04/10/2001 | US6213204 High load, thin slip system |
| 04/10/2001 | CA2156984C Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion |
| 04/05/2001 | WO2001023702A1 A device in a subsea system for controlling a hydraulic actuator and a subsea system with a hydraulic actuator |
| 04/05/2001 | WO2001007748A3 Mechanism for dropping a plurality of balls into tubulars |
| 04/04/2001 | EP0894353A4 Underground well electrical cable transition, seal and method |
| 04/04/2001 | CN2426013Y Hydraulic controlled casing valve for well cementing |
| 04/04/2001 | CN2426012Y Novel casing head |
| 04/04/2001 | CN2426006Y Moveable sealing device |
| 04/03/2001 | US6210075 Spar system |
| 04/03/2001 | US6209652 Deployment system method and apparatus for running bottomhole assemblies in wells, particularly applicable to coiled tubing operations |
| 04/03/2001 | US6209650 Subsea well |
| 04/03/2001 | US6209640 Method of obtaining improved geophysical information about earth formations |
| 04/03/2001 | US6209638 Casing accessory equipment |
| 04/03/2001 | US6209636 Wellbore primary barrier and related systems |
| 04/03/2001 | CA2222205C Spoolable coiled tubing completion system |
| 04/03/2001 | CA2202174C Apparatus for increasing the transfer rate of production stimulation fluids through a wellhead of a hydrocarbon well |
| 03/30/2001 | CA2321377A1 Expandable borehole packer |
| 03/28/2001 | EP1086976A1 Process for preparing microgels of controlled size |
| 03/28/2001 | CN2425196Y Removable bridge plug |
| 03/27/2001 | US6206100 Separable one-trip perforation and gravel pack system and method |
| 03/27/2001 | US6206095 Apparatus for dropping articles downhole |
| 03/27/2001 | US6206094 Launching tool for objects downhole |
| 03/21/2001 | EP1084325A1 Arrangement for the removal of cuttings and gas arising from drilling operations |
| 03/21/2001 | EP0996812A4 Deformed multiple well template and process of use |
| 03/21/2001 | CN1288036A High temp. temporary plugging agent and its prepn. method |
| 03/20/2001 | US6203020 Downhole packer with element extrusion-limiting device |
| 03/20/2001 | US6202764 Straight line, pump through entry sub |
| 03/20/2001 | US6202753 Subsea accumulator and method of operation of same |
| 03/20/2001 | US6202748 Multi-stage maintenance device for subterranean well tool |
| 03/20/2001 | US6202747 Hydraulic well packer and method |
| 03/20/2001 | US6202745 Wellhead apparatus |
| 03/20/2001 | US6202743 Underground well electrical cable transition with seals and drain |
| 03/20/2001 | US6202742 Pack-off device for use in a wellbore having a packer assembly located therein |
| 03/17/2001 | CA2319602A1 Hydraulic tensioning device for inflatable packer element |
| 03/16/2001 | CA2318703A1 Compositions and methods for cementing using elastic particles |
| 03/15/2001 | WO2001018357A2 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 03/14/2001 | EP1083298A2 Plug release indicator in a well |
| 03/14/2001 | EP1082515A1 Offshore drilling system |
| 03/14/2001 | EP0935718A4 Transmission assembly |
| 03/14/2001 | CN2423399Y Current-limiting self fill-up type floating coupling and floating shoe |
| 03/14/2001 | CN2423398Y Spillover type pumping packing box |
| 03/13/2001 | US6200152 Electrical connection |
| 03/13/2001 | US6199914 Drilling quick connectors |
| 03/13/2001 | US6199630 Pull-through tubing string rotator for an oil well |
| 03/09/2001 | CA2281727A1 Single string rotary pump system |
| 03/07/2001 | CA2317261A1 Detector apparatus and method for oil or gas well, and object to be detected therein |
| 03/06/2001 | US6196323 Well head system |
| 03/06/2001 | US6196316 Compositions for use in well construction, repair and/or abandonment |
| 03/06/2001 | US6196311 Universal cementing plug |
| 02/28/2001 | EP1079065A2 Subsea tree coupling for mudline suspension system |
| 02/28/2001 | EP1078022A1 Injection molded degradable casing perforation ball sealers |
| 02/28/2001 | EP0705379B1 Tool for use in wellbore operations |
| 02/28/2001 | CN2421409Y Semi-sealing and fully-sealing universal preventer for producing crude oil |
| 02/28/2001 | CN2421408Y Anti-theft pressing cap for stuffing box of pump well wellhead |
| 02/28/2001 | CN1062637C Method of creating casing in borehole |
| 02/27/2001 | USRE37066 Soil sampling system with sample container rigidly coupled to drive casing |
| 02/27/2001 | US6192983 Coiled tubing strings and installation methods |
| 02/27/2001 | US6192982 System for individual inflation and deflation of borehole packers |
| 02/27/2001 | US6192981 Coiled tubing hanger assembly |
| 02/27/2001 | US6192680 Subsea hydraulic control system |
| 02/22/2001 | WO2001012948A1 Methods and apparatus for the emergency actuation of control systems |
| 02/22/2001 | WO2001012946A1 Smart shuttles to complete oil and gas wells |
| 02/21/2001 | EP1076758A2 A method for the formation of a plug in a petroleum well |
| 02/21/2001 | EP1076757A1 Method and apparatus for sealing between casing and wellhead connector structure |
| 02/21/2001 | CN2420420Y High efficiency polished rod seal capable of automatic collecting oil |