| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 06/26/2001 | US6250848 Process for guidance, containment, treatment, and imaging in a subsurface environment utilizing ferro-fluids |
| 06/26/2001 | US6250638 Taper joint well sealing packer and method |
| 06/26/2001 | US6250392 Pump systems and methods |
| 06/26/2001 | US6250383 Lubricator for underbalanced drilling |
| 06/26/2001 | US6250371 Energy transfer systems |
| 06/26/2001 | US6250199 Subsea power module |
| 06/20/2001 | EP1108115A1 Method for sealing rocks or building material and corresponding device |
| 06/20/2001 | CN2435512Y Wellhead spilled oil recovery device |
| 06/19/2001 | US6247542 Non-rotating sensor assembly for measurement-while-drilling applications |
| 06/19/2001 | US6247534 Wellbore cable system |
| 06/14/2001 | WO2001042721A2 An energy transfer system and a method for providing energy transfer services |
| 06/14/2001 | WO2001042620A1 Sand control method and apparatus |
| 06/14/2001 | US20010003314 Rotating casing assembly and method |
| 06/13/2001 | EP1105620A1 Hydraulic well control system |
| 06/13/2001 | EP0824630A4 Mechanism for anchoring a well tool |
| 06/13/2001 | CN2434430Y Expansion clog prevention packer |
| 06/13/2001 | CN2434429Y Compensator for preventing packer from opening in advance |
| 06/13/2001 | CN2434428Y Hydraulic power expansion packer |
| 06/12/2001 | US6244642 Retrievable bridge plug and retrieving tool |
| 06/12/2001 | US6244560 Blowout preventer ram actuating mechanism |
| 06/12/2001 | US6244359 Subsea diverter and rotating drilling head |
| 06/12/2001 | US6244350 Apparatus for launching at least one plug into a tubular in a wellbore |
| 06/12/2001 | US6244348 Well production system with a hydraulically operated safety valve |
| 06/12/2001 | US6244342 Reverse-cementing method and apparatus |
| 06/12/2001 | US6244336 Double shearing rams for ram type blowout preventer |
| 06/07/2001 | WO2001040617A1 Creating multiple fractures in an earth formation |
| 06/07/2001 | WO2001040614A2 Ceramic components for high pressure oil wells |
| 06/07/2001 | US20010002626 Method of creating a wellbore in an underground formation |
| 06/07/2001 | US20010002621 Packer |
| 06/07/2001 | CA2396420A1 Ceramic components for high pressure oil wells |
| 06/06/2001 | EP1104517A1 Spring compression seal |
| 06/06/2001 | CN2433389Y High-reliability anti-sand washing well packer |
| 06/05/2001 | US6241023 Unlocking packer setting method and device |
| 06/05/2001 | US6241017 Caged slip system and release methods |
| 06/02/2001 | CA2291358A1 Improved blow-out preventer |
| 05/31/2001 | WO2001038692A2 Sealing off openings through the wall of a well tubular |
| 05/31/2001 | WO2001038691A2 Device for injecting a fluid into a formation |
| 05/31/2001 | WO2001038690A1 Setting an annular seal |
| 05/31/2001 | WO2000045024A3 Securing a well casing to a wellbore |
| 05/31/2001 | CA2391435A1 Setting an annular seal |
| 05/30/2001 | CN2432333Y Flushing packer |
| 05/30/2001 | CN2432332Y Throttling type natural gas well outward transmission pipeline safety device |
| 05/30/2001 | CN1066514C Method and apparatus for intermittent production of oil using gas-lift plug |
| 05/30/2001 | CA2291301A1 Rotating casing assembly |
| 05/29/2001 | US6237964 Socket pipe coupling for subsea pipeline systems |
| 05/29/2001 | US6237689 Method for confirming the integrity of a seal system within a subterranean well conduit Christmas tree valve assembly |
| 05/29/2001 | US6237686 Cementing plug |
| 05/29/2001 | US6237685 Bolt-on well adapter |
| 05/29/2001 | CA2208725C Above production disposal tool |
| 05/29/2001 | CA2024347C Sealing assembly for subterranean well packing unit |
| 05/25/2001 | WO2001036785A1 Two-part connector for fluid carrying conduits |
| 05/24/2001 | US20010001419 Wellhead housing seal assembly with backup feature |
| 05/23/2001 | EP1101012A1 Mechanism for dropping a plurality of balls into tubulars used in drilling, completion and workover of oil, gas and geothermal wells, and method of using same |
| 05/22/2001 | US6236620 Integrated well drilling and evaluation |
| 05/22/2001 | US6234253 Method and apparatus for well workover or servicing |
| 05/22/2001 | US6234252 External tieback connector and method for tying back riser to subsea wellhead |
| 05/22/2001 | US6234249 Device for use with a retrievable bridge plug |
| 05/22/2001 | US6234247 Bore hole safety valves |
| 05/17/2001 | WO2001034938A1 Hydraulically set straddle packers |
| 05/17/2001 | WO2001034937A1 Method and device for exciting transversal oscillations of a pipe string in a borehole |
| 05/16/2001 | EP1082515A4 Offshore drilling system |
| 05/16/2001 | EP1071862A4 Rotating subsea diverter |
| 05/16/2001 | CN2430541Y Hydraulic graduation cementing joint |
| 05/16/2001 | CN2430540Y Anti-theft packing box |
| 05/16/2001 | CN2430539Y Combined sealing wellhead diverter main body |
| 05/16/2001 | CN1295645A Rotating connector with compensating unit |
| 05/15/2001 | US6230824 Rotating subsea diverter |
| 05/15/2001 | US6230808 Downhole apparatus |
| 05/15/2001 | US6230800 Methods and apparatus for long term monitoring of a hydrocarbon reservoir |
| 05/15/2001 | US6230798 Inflatable packer |
| 05/10/2001 | WO2001033045A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033044A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033029A2 Sub sea bottom hole assembly change out system and method |
| 05/10/2001 | CA2376544A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/09/2001 | EP1097287A1 Floating spar for supporting production risers |
| 05/09/2001 | CN2429624Y Rotary packer |
| 05/09/2001 | CN1294244A Cementing tool for plugging well underground |
| 05/08/2001 | US6227301 Christmas tree |
| 05/08/2001 | US6227300 Slimbore subsea completion system and method |
| 05/05/2001 | CA2325105A1 Downhole packoff assembly |
| 05/03/2001 | WO2001031166A1 Method and device for replacing equipment on the seabed |
| 05/03/2001 | WO2001031160A1 Method and apparatus for operations in underground/subsea oil and gas wells |
| 05/02/2001 | EP1096104A1 Apparatus and methods of testing and drilling a well |
| 05/02/2001 | EP1075582A4 Subsea mud pump |
| 05/02/2001 | CN2428565Y Super-short type packer capable of washing well |
| 05/01/2001 | US6223825 Swivel |
| 05/01/2001 | US6223823 Method of and apparatus for installing casing in a well |
| 05/01/2001 | US6223821 Inflatable packer inflation verification system |
| 05/01/2001 | US6223820 Inflatable packing device including cover means for effecting a uniform expansion profile |
| 05/01/2001 | US6223819 Wellhead for providing structure when utilizing a well pumping system |
| 04/27/2001 | CA2291989A1 Well pressure system |
| 04/26/2001 | WO2001029368A1 Apparatus and method for controlling fluid flow with sand control |
| 04/26/2001 | WO2001029367A1 Drillable inflatable packer & methods of use |
| 04/25/2001 | EP1094195A2 Packer with pressure equalizing valve |
| 04/25/2001 | EP1094193A2 Dual riser assembly |
| 04/25/2001 | EP1093540A1 Method and multi-purpose apparatus for control of fluid in wellbore casing |
| 04/25/2001 | CN2427625Y Telescopic and antisticking type fracture packer |
| 04/25/2001 | CN2427624Y Means for jacking-off sealing packinging over well pumping rod |
| 04/25/2001 | CN2427623Y Means for filling sealing packings over well pumping rod |
| 04/25/2001 | CN2427622Y Adjustable type well pump sealing means |