| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 07/25/2012 | EP2479376A1 Annular barrier with a diaphragm |
| 07/25/2012 | EP2478181A2 Fracturing and gravel packing tool with multi movement wash pipe valve |
| 07/25/2012 | CN202348239U Sand control process pipe string for sealing check of sand control hung filter of horizontal well and sealing |
| 07/25/2012 | CN202348223U Automatic shackle-assembling device for anti-spraying plug valve |
| 07/25/2012 | CN202348219U Fluidized bed |
| 07/25/2012 | CN202348218U Closed type cementing tool |
| 07/25/2012 | CN202348217U Syringe-type grout injector |
| 07/25/2012 | CN202348216U Novel well cementation device for preventing cement backflow at well bottom |
| 07/25/2012 | CN202348215U Cement-injection leaking stoppage separation balancer |
| 07/25/2012 | CN202348214U Plugging device |
| 07/25/2012 | CN202348213U Underground drill-rod-outside blow-out preventer |
| 07/25/2012 | CN202348212U Annular hydraulic compression type packer |
| 07/25/2012 | CN202348211U Complete equipment for preventing gas emission from drill hole |
| 07/25/2012 | CN202348210U Orifice blowout preventer for drilling |
| 07/25/2012 | CN202348209U Anti-spraying sealer assembly |
| 07/25/2012 | CN202348208U Automatic blowout prevention system of oilfield workover rig |
| 07/25/2012 | CN202348207U Paraffin scraping blowout preventer for sucker rod |
| 07/25/2012 | CN202348206U Leakage-proof and blowout-proof device for wellhead packing box |
| 07/25/2012 | CN202348205U Simple casing head device |
| 07/25/2012 | CN202348204U Self-compensation well head sealing device |
| 07/25/2012 | CN202348203U Opening device dedicated for wellhead oil recovery antitheft device |
| 07/25/2012 | CN202348202U Multifunctional polish rod sealer |
| 07/25/2012 | CN202348201U Slip-type spraying device |
| 07/25/2012 | CN202348200U High-pressure blowout-prevention two-stage packing box |
| 07/25/2012 | CN202348199U Crossing prolonging sealing assembly for oil extraction tree wellhead |
| 07/25/2012 | CN102612588A Sealing apparatus and method |
| 07/25/2012 | CN102606143A Downward hole pressure measuring device and process |
| 07/25/2012 | CN102606118A Subdivision water injection, ball-off and profile control integrated tubular column for water injection well of oilfield and process of tubular column |
| 07/25/2012 | CN102606107A Halfway cementing well completion tube column and halfway cementing method |
| 07/25/2012 | CN102606106A Ring seal assembly of bidirectional metal seal structure |
| 07/25/2012 | CN102606091A Automatic treatment assembly for top drive pipe |
| 07/25/2012 | CN101844902B High-strength expandable mine sealing material capable of being solidified quickly |
| 07/25/2012 | CN101787268B Gel profile control agent for delaying generation of precipitation granules and preparation method thereof |
| 07/25/2012 | CN101624904B Open hole completion well sand resistant pipe string of sidetracking branch well and inserting type acid cleaning filling inner pipe string thereof |
| 07/24/2012 | US8225880 Method and system for zonal isolation |
| 07/24/2012 | US8225879 Ram blowout preventer stroke limiting and method |
| 07/24/2012 | US8225861 Sealing feed through lines for downhole swelling packers |
| 07/24/2012 | US8225857 Breech lock mechanisms for blowout preventer and method |
| 07/24/2012 | CA2605201C Lubricator system |
| 07/24/2012 | CA2573489C Wellhead assembly for hydraulic pumping system |
| 07/19/2012 | WO2012097257A2 Electrically engaged, hydraulically set downhole devices |
| 07/19/2012 | WO2012097071A2 Oilfield apparatus and method comprising swellable elastomers |
| 07/19/2012 | WO2012096755A1 Flowline divertor seal with spring-energized lips |
| 07/19/2012 | WO2012096738A2 Gravel packing in lateral wellbore |
| 07/19/2012 | WO2012096581A1 Bore protector |
| 07/19/2012 | WO2012096580A1 Method for combined cleaning and plugging in a well, a washing tool for directional washing in a well, and uses thereof |
| 07/19/2012 | WO2012094854A1 Multi-phase underground syringe and sidewall reinforcement method |
| 07/19/2012 | WO2012071189A3 Swellable packer having thermal compensation |
| 07/19/2012 | WO2012067842A3 Sealing devices having a non-elastomeric fibrous sealing material and methods of using same |
| 07/19/2012 | WO2012047351A4 Seal assembly and method |
| 07/19/2012 | US20120181050 Method and apparatus for setting a packer |
| 07/19/2012 | US20120181049 Electrically Engaged, Hydraulically Set Downhole Devices |
| 07/19/2012 | US20120181048 Debris barrier assembly |
| 07/19/2012 | US20120181032 Disintegrating ball for sealing frac plug seat |
| 07/19/2012 | US20120181021 Rotational test valve with tension reset |
| 07/19/2012 | US20120181018 Rotational wellbore test valve |
| 07/19/2012 | US20120181017 Expandable Device for Use in a Well Bore |
| 07/19/2012 | CA2843868A1 Controlled hydrostatic pressure completion system |
| 07/19/2012 | CA2824132A1 Gravel packing in lateral wellbore |
| 07/19/2012 | CA2822383A1 Method for combined cleaning and plugging in a well, a washing tool for directional washing in a well, and uses thereof |
| 07/18/2012 | EP2475842A2 Tubular seat and tubular actuating system |
| 07/18/2012 | CN202338317U Tie-back inserting and sealing device for fracturing |
| 07/18/2012 | CN202338304U 易打捞可打掉防砂罩卡瓦式井下节流器 Easy salvage can knock down sand cover slip type downhole choke |
| 07/18/2012 | CN202338290U 带双封气举完井一体化管柱 With double sealing gas lift completion integration string |
| 07/18/2012 | CN202338273U 可取可钻盲板 Advisable to drill blind plate |
| 07/18/2012 | CN202338272U 井下专用组合胶塞 Downhole special combination stopper |
| 07/18/2012 | CN202338271U Mechanism for stopping generating fixed point rotation in process of drilling out well cementing accessory |
| 07/18/2012 | CN202338270U 无内管免钻塞分级注水泥装置 No inner tube stage cementing plug drill-free device |
| 07/18/2012 | CN202338269U Mud return preventing device for sidetrack horizontal well |
| 07/18/2012 | CN202338268U Hydraulic type oil-line plugging device |
| 07/18/2012 | CN202338267U Embedded bidirectional suspended packer |
| 07/18/2012 | CN202338266U 一种可锚定式皮碗封隔器 One kind may be anchored style cup packer |
| 07/18/2012 | CN202338265U 丝杠式封隔堵水器 Screw packer shutoff device |
| 07/18/2012 | CN202338264U 微电脑控制式封隔器 Microcomputer control packer |
| 07/18/2012 | CN202338263U 膨胀管二次膨胀的自密封膨胀锥 Since the second expansion of the expandable tubes expanding cone seal |
| 07/18/2012 | CN202338262U Cutting preventing device for opening window on casing and sidetrack drilling of retrievable whipstock for multilateral well |
| 07/18/2012 | CN202338261U 重复油管堵塞器 Repeat pipe clogged filter |
| 07/18/2012 | CN202338260U 防喷器组合护板 BOP combination guard |
| 07/18/2012 | CN202338259U 抽油机井口光杆密封器 Pumping wellhead rod sealer |
| 07/18/2012 | CN202338258U 分体式自封封井器 Split self-styled blowout preventer |
| 07/18/2012 | CN202338257U 连续油管排水采气密封悬挂一体化井口装置 Coiled tubing drainage gas wellhead seal suspension integration |
| 07/18/2012 | CN202338256U 自喷井自动泄压导向油嘴 Self-guided automatic pressure relief wells spray nozzle |
| 07/18/2012 | CN202338255U 多功能压井管汇连接装置 Multifunction kill manifold connecting device |
| 07/18/2012 | CN202338254U 两瓣型油管封闭引流器 Two closed shunt tubing |
| 07/18/2012 | CN202338224U 抽油光杆与盘根盒的保护装置 Shiny rod pumping protector packing boxes |
| 07/18/2012 | CN202338211U Anti-overflow pipe |
| 07/18/2012 | CN102597415A Hydraulic control system minitoring apparatus and method |
| 07/18/2012 | CN102587896A Mechanical water exploration and water plugging channeling detection composite tubular column |
| 07/18/2012 | CN102587876A Method for improving recovery ratio of oil field by use of blasting type pre-crosslinking gel particles |
| 07/18/2012 | CN102587859A Technology for blocking mine water bursting through backflow grouting |
| 07/18/2012 | CN102587858A Method for blocking water for fracture and hole type reservoir |
| 07/18/2012 | CN102587852A Liner hanger and setting tool |
| 07/18/2012 | CN101550825B Double- stroke flexible pumping unit annular gas test wellhead |
| 07/18/2012 | CN101333916B Closed well washing device |
| 07/18/2012 | CN101182760B Under balance drilling revolution control device |
| 07/18/2012 | CN101012738B Corrosion resistant multifunctional high-pressure well mouth apparatus |
| 07/17/2012 | US8220773 Rechargeable subsea force generating device and method |
| 07/17/2012 | US8220538 Plug |
| 07/17/2012 | US8220536 Downhole fluid communication apparatus and method |
| 07/17/2012 | US8220535 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |