| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 02/02/2011 | CN201730586U Four-rubber cylinder compression packer |
| 02/02/2011 | CN201730585U Inflatable tubing plug |
| 02/02/2011 | CN201730584U Release for oil casing drilling |
| 02/02/2011 | CN201730583U Thermosensitive metal expanding packer |
| 02/02/2011 | CN201730582U Constant flow adjustable blanking plug |
| 02/02/2011 | CN201730581U Regulable constant current stopper |
| 02/02/2011 | CN201730580U Flow-stabilizing adjustable and multifunctional blocking device |
| 02/02/2011 | CN201730579U High-temperature resistant well control device for double-pipe operation in horizontal wells |
| 02/02/2011 | CN201730578U Forced self-grouting arrow-shaped check valve |
| 02/02/2011 | CN201730577U Blowout preventer for hydraulic pressure gate |
| 02/02/2011 | CN201730576U Straight pipe type thermal production casing pipe head |
| 02/02/2011 | CN201730575U Offset regulation positioning type polish rod sealing device |
| 02/02/2011 | CN201730574U Wellhead device oil pipe hanging metal sealing device |
| 02/02/2011 | CN201730573U Direct drive type screw pump well eccentric testing head |
| 02/02/2011 | CN101963051A Oil well packer |
| 02/02/2011 | CN101963050A Sucker rod deviation-based anti-eccentric wear sealing packing box |
| 02/01/2011 | US7879965 Gypsum wallboard |
| 02/01/2011 | US7878256 Burst plug for a downhole fluid passage |
| 02/01/2011 | US7878245 introducing a treatment fluid into a well bore containing a high density particulate fluoroelastomer ( e.g. polytetrafluoroethyene, ethylene-tetrafluoroethyene copolymer, hexafluoropropylene-tetrafluoroethylene copolymer, polyvinylidene fluoride etc.) to separate drilling fluid from another fluid |
| 02/01/2011 | US7878239 Fluid collecting apparatus |
| 02/01/2011 | US7878237 Actuation system for an oilfield tubular handling system |
| 01/31/2011 | CA2855020A1 Rotating control device |
| 01/31/2011 | CA2711621A1 Rotating control device |
| 01/31/2011 | CA2710079A1 Esp for perforated sumps in horizontal well applications |
| 01/29/2011 | CA2674703A1 Method of servicing high temperature wells |
| 01/27/2011 | WO2011011574A2 Use of a spoolable compliant guide and coiled tubing to clean up a well |
| 01/27/2011 | WO2010115188A3 Nitinol spring through tubing bridge plug |
| 01/27/2011 | WO2010114592A3 Anchor and hydraulic setting assembly |
| 01/27/2011 | US20110017475 Nitinol Spring Through Tubing Bridge Plug |
| 01/27/2011 | US20110017472 Vented plug assemblies for wellbores |
| 01/27/2011 | US20110017471 Downhole valve assembly |
| 01/27/2011 | US20110017452 Spacer Fluids Containing Cement Kiln Dust and Methods of Use |
| 01/27/2011 | US20110017450 Method for making gravel filters in oil wells |
| 01/27/2011 | US20110017444 Dual Stripper Assembly for Slick Cable |
| 01/26/2011 | EP2278123A2 Focused sampling of formation fluids |
| 01/26/2011 | EP2278118A2 Adjustable wireline sheave for stuffing box |
| 01/26/2011 | EP2278117A2 Adjustable wireline sheave for wireline pulley |
| 01/26/2011 | EP2278114A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2278113A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2278112A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2278111A2 Apparatus and methods for drilling a wellbore using casing |
| 01/26/2011 | EP2276907A1 Plug construction comprising a hydraulic crushing body |
| 01/26/2011 | EP2118436B1 Downhole apparatus and method |
| 01/26/2011 | CN201723245U Liquid injection type hole plugging device in gas drainage |
| 01/26/2011 | CN201723243U Disposable infusion set for gas drainage grouting equipment |
| 01/26/2011 | CN201723217U Underground open-type seal checking device for pack-off strings |
| 01/26/2011 | CN201723205U Swabbing rubber cylinder body |
| 01/26/2011 | CN201723201U Perforated pipe for coal mine |
| 01/26/2011 | CN201723200U Pneumatic stirring and slurry conveying all-in-one machine for draining gas |
| 01/26/2011 | CN201723199U Compressed water-plugging packer |
| 01/26/2011 | CN201723198U Two-way opening pressure differential sliding sleeve |
| 01/26/2011 | CN201723197U Adjustable constant-flow intelligent stopper |
| 01/26/2011 | CN201723196U Self-sealing setting ball seat |
| 01/26/2011 | CN201723195U Fool-type gas drainage hole sealing device |
| 01/26/2011 | CN201723194U High-temperature and high-pressure metal skeleton sealing rubber barrel |
| 01/26/2011 | CN201723193U Sucker rod hydraulic blowout preventer |
| 01/26/2011 | CN201723192U Device for desilting plug-drilling tool |
| 01/26/2011 | CN101956547A Wellsite surface equipment system |
| 01/26/2011 | CN101956539A Follow-up centering sealing device of pumping well head |
| 01/25/2011 | US7874365 Methods and devices for treating multiple-interval well bores |
| 01/25/2011 | US7874361 Methods and devices for forming a wellbore with casing |
| 01/25/2011 | US7874354 Packer-anchoring device |
| 01/25/2011 | CA2637082C Reverse-circulation cementing of surface casing |
| 01/25/2011 | CA2626487C Expandable liner hanger with bypass |
| 01/25/2011 | CA2626179C Apparatus and method for reverse circulation cementing a casing in an open-hole wellbore |
| 01/25/2011 | CA2585489C Sealed branch wellbore transition joint |
| 01/25/2011 | CA2504988C Tubular expansion fluid production assembly and method |
| 01/25/2011 | CA2468433C A wellhead assembly for communicating with the casing hanger annulus |
| 01/21/2011 | CA2708851A1 Dual stripper assembly for slick cable |
| 01/20/2011 | WO2011006519A1 Actuator |
| 01/20/2011 | WO2010131119A3 System and method for enhancing packer operation and longevity |
| 01/20/2011 | WO2010127801A3 Activation-device launcher for a cementing head |
| 01/20/2011 | WO2010126777A9 System and method for subsea control and monitoring |
| 01/20/2011 | WO2010120523A3 Expansion against cement for zonal isolation |
| 01/20/2011 | WO2009093069A3 Method and apparatus for facilitating continuous circulation of drilling mud during construction and maintenance of a well |
| 01/20/2011 | US20110012311 Body to Bonnet Seal on a Blowout Preventer |
| 01/20/2011 | US20110011599 Methods and devices for isolating wellhead pressure |
| 01/20/2011 | US20110011598 Internal lockdown snubbing plug |
| 01/20/2011 | US20110011557 System to enable geothermal field interaction with existing hvac systems, method to enable geothermal field interaction with existing hvac system |
| 01/20/2011 | DE202010006660U1 Erdöl-Bohrloch-Verschluss Oil well closure |
| 01/19/2011 | EP2274501A1 Device for injection and stimulation of fluids in a well bore |
| 01/19/2011 | CN201714364U Tubular column for horizontal well barefoot well completion staged fracturing acidizing tool |
| 01/19/2011 | CN201714339U Underground valve for preventing formation loss |
| 01/19/2011 | CN201714338U Multifunctional double-slip packer |
| 01/19/2011 | CN201714337U Hole sealing device |
| 01/19/2011 | CN201714336U Step-by-step releasable well-flushing packer |
| 01/19/2011 | CN201714335U Compressed double-sealed open hole packer |
| 01/19/2011 | CN201714334U Oilwell deblocking communication device |
| 01/19/2011 | CN201714333U Steam channeling prevention well sealing device of oil pumping well |
| 01/19/2011 | CN201714332U Drilling gas spraying-preventing system |
| 01/19/2011 | CN201714331U Multifunctional convenient well head connector |
| 01/19/2011 | CN201714330U Oil-guide and leakage-control device for offshore oil production blowout |
| 01/19/2011 | CN201714329U Cylindrical well plugging device |
| 01/19/2011 | CN201714328U Improved polished-rod sealer |
| 01/19/2011 | CN201714327U Overflow prevention device of spray pipe for borehole operation |
| 01/19/2011 | CN101949273A Method for plugging spring opening in drilling |
| 01/19/2011 | CN101949272A Method for performing workover on oil and gas wells by using chemical gel |
| 01/19/2011 | CN101482026B Gas extraction secondary high-pressure slip-casting hole-sealing apparatus and its hole-sealing method |
| 01/18/2011 | US7870909 Deployable zonal isolation system |
| 01/18/2011 | US7870905 Controlling the pressure within an annular volume of a wellbore |