| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 08/10/2011 | CN102146786A Polymer flooding and water flooding double-function external adjusting stopper |
| 08/10/2011 | CN102145989A Corrosion resistant cement system and application thereof |
| 08/10/2011 | CN101672196B Method for improving amount of drained, extracted and pressure released gas in surface well drilling |
| 08/10/2011 | CN101598020B Energy-saving and heat-preserving novel technology for exploring bittern by natural flow |
| 08/10/2011 | CN101165309B Compression type packer |
| 08/10/2011 | CN101165308B Forced slip shrinkage packer |
| 08/09/2011 | US7994257 Downwell system with swellable packer element and composition for same |
| 08/09/2011 | US7992643 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 08/09/2011 | US7992642 Polished bore receptacle |
| 08/09/2011 | US7992635 System and apparatus for sealing a fracturing head to a wellhead |
| 08/09/2011 | US7992633 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 08/09/2011 | CA2629441C Valve within a control line |
| 08/09/2011 | CA2480228C Gas operated automatic, liquid pumping system for wells |
| 08/09/2011 | CA2451587C Conductor system |
| 08/04/2011 | WO2011094274A2 Collet system |
| 08/04/2011 | WO2011094115A2 An openable port and method |
| 08/04/2011 | WO2011093902A1 Method and apparatus for sealing an annulus of a wellbore |
| 08/04/2011 | WO2011093714A1 Underwater stuffing box and a method for running a drill string through the stuffing box |
| 08/04/2011 | WO2011071619A3 Ultra high temperature packer by high-temperature elastomeric polymers |
| 08/04/2011 | WO2011059743A3 Tubular actuator, system and method |
| 08/04/2011 | WO2011044070A3 Formation testing planning and monitoring |
| 08/04/2011 | US20110186308 Asymmetric seal and method |
| 08/04/2011 | US20110186307 Downhole Tool Having Setting Valve for Packing Element |
| 08/04/2011 | US20110186306 Oilfield isolation element and method |
| 08/04/2011 | US20110186297 Applications of smart fluids in well service operations |
| 08/04/2011 | US20110186294 Outside casing conveyed low flow impedance sensor gauge system and method |
| 08/04/2011 | US20110186290 Use of Micro-Electro-Mechanical Systems (MEMS) in Well Treatments |
| 08/04/2011 | CA2788553A1 Method and apparatus for sealing an annulus of a wellbore |
| 08/04/2011 | CA2787705A1 An openable port and method |
| 08/04/2011 | CA2691891A1 Applications of smart fluids in well service operations |
| 08/03/2011 | EP2351904A1 Methods and apparatus for a downhole tool |
| 08/03/2011 | EP2350434A2 Elastic hollow particles for annular pressure buildup mitigation |
| 08/03/2011 | EP2350433A2 Use of swellable material in an annular seal element to prevent leakage in subterranean well |
| 08/03/2011 | CN201915954U 沥青封堵模拟试验装置 Asphalt sealing simulation test device |
| 08/03/2011 | CN201915930U 一种热采专用三通 A heat-recoverable special tee |
| 08/03/2011 | CN201915926U 防蠕动注水管柱 Anti-peristaltic injection string |
| 08/03/2011 | CN201915916U 分层压裂防砂管柱 Stratified sand fracturing string |
| 08/03/2011 | CN201915907U 油井套管油收油移动装置 Well casing oil skimmers mobile devices |
| 08/03/2011 | CN201915900U 投灰式油管堵塞器 Cast gray type tubing plug device |
| 08/03/2011 | CN201915899U 一种防倒流关闭式注水泥固井器 An anti-backflow device cementing closing |
| 08/03/2011 | CN201915898U 裸眼井封隔器胶筒 Openhole packer cones |
| 08/03/2011 | CN201915897U 一种裸眼完井分段压裂封隔器 One kind of staged fracturing openhole completion packer |
| 08/03/2011 | CN201915896U 锥形丢手式油管堵塞器 Cone-type tubing plug is throwing hand |
| 08/03/2011 | CN201915895U 封隔器 Packer |
| 08/03/2011 | CN201915894U 一种锁球式坐封球座 One kind of lock packer tee ball |
| 08/03/2011 | CN201915893U 反应型泡沫封孔系统 Reactive foam sealing system |
| 08/03/2011 | CN201915892U 膨胀封隔器 Inflatable packer |
| 08/03/2011 | CN201915891U Overflow prevention structure for underground drilling construction of coal mine |
| 08/03/2011 | CN201915890U 抽油井井口防喷装置 Pumping wellhead blowout preventer |
| 08/03/2011 | CN201915889U 液控四闸板防喷器 Pilot four ram BOP |
| 08/03/2011 | CN201915888U 连续油管井口悬挂密封装置 Coiled tubing wellhead seal suspension |
| 08/03/2011 | CN201915887U 水下井口用密封总成 Subsea wellhead seal assembly |
| 08/03/2011 | CN201915886U 油井自动调节光杆密封器 Well automatically adjust the light bar sealer |
| 08/03/2011 | CN201915885U 防泄漏自动寻正油井封堵器 Leak-proof closure device automatically find the positive wells |
| 08/03/2011 | CN201915884U 可调整中心的采油树井口装置 Christmas tree wellhead adjustable center |
| 08/03/2011 | CN201915883U 油田新型井口盘根密封装置 The new oilfield wellhead seal packing |
| 08/03/2011 | CN201915882U 火驱注汽井口电缆密封装置 Fire Flooding steam injection wellhead cable sealing device |
| 08/03/2011 | CN201915881U 限位定芯扶正胶皮闸门 Limit fixed core righting rubber gate |
| 08/03/2011 | CN201915880U 油气钻修井井口伸缩式溢流管 Oil and gas drilling and workover wellhead telescopic overflow pipe |
| 08/03/2011 | CN201915873U 带过流槽的卡瓦式套管悬挂器 Casing with overcurrent slip hanger slot |
| 08/03/2011 | CN102140901A High pressure resistant drilled hole sealing method |
| 08/03/2011 | CN102140900A Design method of expanding type anti-sticking packer |
| 08/03/2011 | CN101265792B Hydraulic switch sliding bush |
| 08/03/2011 | CN101165310B One-way slip hydraulic base sealed packer |
| 08/02/2011 | US7987915 Circulating sub with mudsaver for dispensing and circulating fluid in a well bore |
| 08/02/2011 | US7987914 Controlling actuation of tools in a wellbore with a phase change material |
| 08/02/2011 | CA2666591C Downhole wet connect using piezoelectric contacts |
| 08/02/2011 | CA2653093C Downhole servicing compositions having high thermal conductivities and methods of using the same |
| 08/02/2011 | CA2617072C Subterranean wellbore apparatus |
| 07/29/2011 | CA2691902A1 Casing annulus isolation device |
| 07/28/2011 | WO2011090639A2 Method and apparatus for releasing a packer |
| 07/28/2011 | WO2011090546A1 Lifting device and method for lifting a bonnet |
| 07/28/2011 | WO2011090491A1 Downhole device actuator and method |
| 07/28/2011 | WO2011089443A2 Apparatus and method for abandoning a well |
| 07/28/2011 | WO2011088572A1 Outside casing conveyed low flow impedance sensor gauge system and method |
| 07/28/2011 | WO2011066044A3 Breech lock mechanisms for blowout preventer and method |
| 07/28/2011 | WO2011062991A3 Apparatus and methods for multi-layer wellbore construction |
| 07/28/2011 | WO2011059756A3 Hydraulic control system minitoring apparatus and method |
| 07/28/2011 | WO2011015911A3 Stuffing box assembly |
| 07/28/2011 | US20110180275 Bi-Metallic Annular Seal and Wellhead System Incorporating Same |
| 07/28/2011 | US20110180274 Deformable dart and method |
| 07/28/2011 | US20110180266 Drill ship for deep sea intervention operations |
| 07/28/2011 | US20110180264 Method and device for filling a void incompletely filled by a cast material |
| 07/28/2011 | US20110180261 Method of removing cutters |
| 07/28/2011 | CA2787534A1 Outside casing conveyed low flow impedance sensor gauge system and method |
| 07/27/2011 | EP2347097A1 Injecting device, drill rig and method of rock bolting |
| 07/27/2011 | EP2347090A1 Support tube for a swell packer, method of manufacturing a swell packer, and method of using a swell packer |
| 07/27/2011 | EP2347089A1 Disposal of well control fluids |
| 07/27/2011 | CN201908640U Anti-buried horizontal well staged fracturing tubular column |
| 07/27/2011 | CN201908636U Multi-functional eccentric separated-injection packing water distributor |
| 07/27/2011 | CN201908616U Tool for quickly closing borehole |
| 07/27/2011 | CN201908615U Delaminated steam injecting packer |
| 07/27/2011 | CN201908614U Packer for long rubber tube |
| 07/27/2011 | CN201908613U Opening valve type expansion packer |
| 07/27/2011 | CN201908612U Blanking plug of eccentric water distributor |
| 07/27/2011 | CN201908611U Lubrication device of blowout preventing box for oil pumping well |
| 07/27/2011 | CN201908610U Blowout control box of oil well |
| 07/27/2011 | CN201908609U Packing material of oil pumping unit well packing box |
| 07/27/2011 | CN201908608U Fixing and sealing structure of wellhead device |
| 07/27/2011 | CN201908607U ET jack screw device |