| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/28/2000 | US6041862 Ground heat exchange system |
| 03/28/2000 | US6041860 Apparatus and method for performing imaging and downhole operations at a work site in wellbores |
| 03/28/2000 | US6041859 Anti-rotation device |
| 03/28/2000 | US6041858 High expansion downhole packer |
| 03/28/2000 | CA2178856C Blowout preventer protector and method of using same during oil and gas well stimulation |
| 03/23/2000 | WO2000015944A2 Plug and plug set for use in wellbore |
| 03/23/2000 | CA2341980A1 Plug and plug set for use in wellbore |
| 03/22/2000 | CN2370154Y Small diameter compressing packer |
| 03/21/2000 | US6039122 Methods and apparatus for automatically lauching sticks of various materials into oil and gas wells |
| 03/21/2000 | US6039120 Adjustable isolation sleeve |
| 03/21/2000 | US6039119 Completion system |
| 03/16/2000 | WO2000014377A1 System for inflation and deflation of borehole packers |
| 03/15/2000 | CN2368974Y Bottom sealing device for spiral sand feeder of sand mixing vehicle |
| 03/15/2000 | CN2368973Y Packer |
| 03/15/2000 | CN2368972Y Monohole top device |
| 03/15/2000 | CN1050404C High temp.-resistant sand-slidifying agent and preparing method |
| 03/14/2000 | US6036451 Shaft assemblies for lineshaft turbine pump |
| 03/14/2000 | US6035938 Wellhead system and method for use in drilling a subsea well |
| 03/09/2000 | WO2000012863A1 Method for sealing rocks or building material and corresponding device |
| 03/09/2000 | WO2000012862A1 Hydraulic well packer |
| 03/09/2000 | WO2000012861A1 Casing hanger |
| 03/09/2000 | DE19839873A1 Arrangement for raising and lowering cleaning device in vertical, clad earth shaft, e.g. well shaft, has motor-driven winch above ground with pipe section on drum with central connector |
| 03/08/2000 | EP0984135A2 Formation pressure measurement with remote sensors in cased boreholes |
| 03/08/2000 | EP0984133A1 Actuation module |
| 03/08/2000 | EP0742968A4 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 03/08/2000 | CN2367762Y Packer capable of drilling |
| 03/08/2000 | CN1246909A Seal for longitudinally movable drillstring component |
| 03/07/2000 | US6032958 Bi-directional pressure-energized metal seal |
| 03/07/2000 | US6032744 Universal pipe and tubing injection apparatus and method |
| 03/07/2000 | US6032742 Blowout preventer control system |
| 03/07/2000 | US6032736 Multi-gage blowout preventer test tool and method |
| 03/07/2000 | US6032734 Activating means for a down-hole tool |
| 03/03/2000 | CA2280208A1 Actuation module |
| 03/02/2000 | WO2000011379A1 Spring compression seal |
| 03/02/2000 | WO2000011312A1 Grouting pipe equipment and method of grouting using the same for an underground water well |
| 02/24/2000 | WO2000009855A1 Hydraulic well control system |
| 02/24/2000 | WO2000009852A1 Bottom-supported guidance device for alignment of multiple wellbores in a single conductor |
| 02/23/2000 | CN2365393Y Packer |
| 02/23/2000 | CN2365392Y Packer capable of cleaning well |
| 02/23/2000 | CN2365391Y Universal self-aligning packing box |
| 02/22/2000 | US6026903 Bidirectional disappearing plug |
| 02/22/2000 | US6026898 Integral tubing head and rotator |
| 02/22/2000 | US6026897 Communication conduit in a well tool |
| 02/17/2000 | WO2000008298A1 Lubricator |
| 02/17/2000 | WO2000008297A1 Subsea control module |
| 02/17/2000 | WO2000008295A1 An apparatus and method for killing a subsea well |
| 02/16/2000 | EP0979925A1 Subsea wellhead assembly |
| 02/16/2000 | EP0979921A1 Method for installing an oil production installation |
| 02/16/2000 | EP0865563B1 Plug launching device |
| 02/16/2000 | CN2364215Y Annular water-finding instrument flow concentrating device |
| 02/16/2000 | CN2364204Y Vapour pressure drive thermal recovery packer |
| 02/16/2000 | CN2364203Y High-pressure blowout preventing centering polish rod sealer |
| 02/16/2000 | CN2364202Y Sucker rod blow-out preventer |
| 02/16/2000 | CN2364201Y High-pressure commingled water injection well top shut-in packer |
| 02/16/2000 | CN1244907A Transmission assembly |
| 02/15/2000 | US6024172 Blow-out preventer |
| 02/15/2000 | CA2268223C A method of cleaning a well that is contaminated by accumulations of sa nd |
| 02/15/2000 | CA2111252C Converting drilling fluids to cementitious compositions |
| 02/09/2000 | CN2363050Y Conductor casing well cementing device |
| 02/09/2000 | CN2363049Y Hydraulic packer for drilling |
| 02/09/2000 | CN2363048Y 气举封隔器 Gas lift packer |
| 02/08/2000 | USRE36556 Method and apparatus for drilling bore holes under pressure |
| 02/08/2000 | US6022421 Method for remotely launching subsea pigs in response to wellhead pressure change |
| 02/03/2000 | WO2000005483A1 Connection of tubulars using a top drive |
| 02/02/2000 | EP0975854A1 Apparatus for launching at least one plug into a tubular in a wellbore |
| 02/02/2000 | CN2361829Y Production tree for pumping well |
| 02/02/2000 | CN2361827Y Packing water-distributing tool |
| 02/02/2000 | CN2361826Y Easy-to-change packing |
| 02/01/2000 | US6019175 Tubing hanger to permit axial tubing displacement in a well bore and method of using same |
| 01/29/2000 | CA2267716A1 Caisson wellhead system |
| 01/27/2000 | WO2000004269A2 Subsea wellbore drilling system for reducing bottom hole pressure |
| 01/27/2000 | WO2000003600A2 Improved tubing handling for subsea oilfield tubing operations |
| 01/27/2000 | WO1999061864A8 Borehole closure plug |
| 01/27/2000 | DE19832669A1 Härtbare Epoxidmasse und deren Verwendung A curable epoxy compound and use thereof |
| 01/26/2000 | EP0974610A2 Curable epoxy compound and its use |
| 01/26/2000 | EP0840834A4 Apparatus and process for drilling and completing multiple wells |
| 01/26/2000 | CN2360595Y Stratified extruding clogging tube pole |
| 01/26/2000 | CN2360594Y Self-checking stratified filling packer able to wash well |
| 01/26/2000 | CN2360593Y Two-layer symmetric eccentric water distribution packer |
| 01/26/2000 | CN2360592Y Well safety control device |
| 01/26/2000 | CN2360591Y Double pressure sealing device |
| 01/26/2000 | CN2360590Y Bearing centering disk root box |
| 01/25/2000 | USRE36525 Spoolable flexible hydraulically set, straight pull release well packer |
| 01/25/2000 | US6017065 Remotely operable underwater connector assembly and method |
| 01/25/2000 | US6016880 Rotating drilling head with spaced apart seals |
| 01/20/2000 | WO2000003112A1 Floating spar for supporting production risers |
| 01/19/2000 | CN2359457Y Packer with multiple differential pressure double piston and capable of flushing |
| 01/19/2000 | CN2359456Y Oil-discharge type heat-extraction packer |
| 01/19/2000 | CN2359455Y Sucker rod sealing ring |
| 01/19/2000 | CN2359454Y Polish rod sealer for pumping well |
| 01/19/2000 | CN2359453Y Self-sealing sucker rod well sealing apparatus on pumping well head |
| 01/19/2000 | CN2359452Y Protective group box for oil production well head |
| 01/18/2000 | US6015015 Insulated and/or concentric coiled tubing |
| 01/18/2000 | US6015014 Downhole lubricator and method |
| 01/18/2000 | US6015013 Lightweight intervention system for use with horizontal tree with internal ball valve |
| 01/18/2000 | US6015009 Casing and tubing hanger system |
| 01/13/2000 | WO2000001922A1 Flying lead workover interface system |
| 01/13/2000 | WO2000001915A2 Control system for the workover of oil wells |
| 01/12/2000 | EP0830531A4 Primary and secondary seal assemblies with contacting convex surfaces |
| 01/12/2000 | CN2358221Y Wellhead slip diverting blowout preventer box |