| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/11/2012 | CN202108456U Multifunctional long-stopped well shut-in device for oil field |
| 01/11/2012 | CN202108455U Well opening system of abnormally-high-pressure gas well |
| 01/11/2012 | CN202108454U Test oil wellhead device with metal sealing structure |
| 01/11/2012 | CN202108444U Recycling type hanger for sleeve well drilling |
| 01/11/2012 | CN202108441U Hanging device of oil sleeve |
| 01/11/2012 | CN202108430U Well-cementing high-pressure line fixing and protecting device |
| 01/11/2012 | CN102317566A Inhibiting rock fractures within a well-bore by creating LCM from the surrounding strata by the downhole crushing/grinding of rock debris |
| 01/11/2012 | CN102312667A Concentric pipe layered steam injection system and method |
| 01/11/2012 | CN102312663A Leakage blocking device for leaking oil well |
| 01/11/2012 | CN102312662A External position indicator of ram blowout preventer |
| 01/11/2012 | CN102312661A Drilling gas blow-out preventing system |
| 01/11/2012 | CN101942978B Preparation method of continuous expansion pipe with high strength and high plastic elasticity |
| 01/11/2012 | CN101806199B Sea deepwater hydraulic connector |
| 01/11/2012 | CN101338654B Method for controlling toxic harmful gas overflow from well head for well repairing |
| 01/11/2012 | CN101315024B Jackrod one-way pump injection type sealing/sealing releasing device for hole-inside base |
| 01/10/2012 | US8091855 Fluorinated elastomeric blowout preventer packers and method |
| 01/10/2012 | US8091648 Direct connecting downhole control system |
| 01/10/2012 | US8091642 Cement composition for carbon dioxide supercritical environment |
| 01/10/2012 | US8091641 Method and apparatus to cement a perforated casing |
| 01/10/2012 | US8091640 Method and device for cementing a well or a pipe |
| 01/10/2012 | US8091639 Geothermal well diversion agent formed from in situ decomposition of carbonyls at high temperature |
| 01/10/2012 | US8091630 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| 01/10/2012 | US8091628 Apparatus and method for providing fluid and projectiles to downhole tubulars |
| 01/10/2012 | CA2723012C Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| 01/10/2012 | CA2679495C Improved system and method for stimulating multiple production zones in a wellbore |
| 01/10/2012 | CA2660505C Methods and apparatus for a downhole tool |
| 01/10/2012 | CA2658994C Revised cure cycle for annular packing units |
| 01/10/2012 | CA2622531C System and method for capping abandoned wells |
| 01/10/2012 | CA2476575C Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device |
| 01/05/2012 | WO2012003425A2 Apparatus and methods for producing oil and plugging blowouts |
| 01/05/2012 | WO2012003196A2 Shape memory cement annulus gas migration prevention apparatus |
| 01/05/2012 | WO2012003146A2 Blowout preventer monitoring system and method of using same |
| 01/05/2012 | WO2012001426A2 Retrievable subsea device and method |
| 01/05/2012 | WO2012001402A2 Oilfield equipment and related apparatus and method |
| 01/05/2012 | WO2012001342A2 Sealing method and apparatus |
| 01/05/2012 | WO2012000098A1 Wellbore control device |
| 01/05/2012 | WO2012000027A1 Measurement of slurry density |
| 01/05/2012 | WO2012000009A1 Device for sealing and fixing a pipe which is inserted into a bore hole or into a pipe, in the bore hole |
| 01/05/2012 | US20120001101 External Position Indicator of Ram Blowout Preventer |
| 01/05/2012 | US20120001100 Blowout preventer-backup safety system |
| 01/05/2012 | US20120000676 Mitigating leaks in production tubulars |
| 01/05/2012 | US20120000675 Multiple activation-device launcher for a cementing head |
| 01/05/2012 | US20120000667 Subsea wellhead assembly |
| 01/05/2012 | US20120000666 Method and arrangement for sealing a subsea oil wellhead |
| 01/05/2012 | US20120000656 Apparatus And Methods For Producing Oil and Plugging Blowouts |
| 01/05/2012 | US20120000655 Methods and apparatus for improved cement plug placement |
| 01/05/2012 | US20120000654 Method for stabilization of mine voids using waste material and a binding agent |
| 01/05/2012 | US20120000650 Methods and apparatus for improved cement plug placement |
| 01/05/2012 | US20120000649 Apparatus and methods for improved cement plug placement |
| 01/05/2012 | US20120000648 Shape Memory Cement Annulus Gas Migration Prevention Apparatus |
| 01/05/2012 | US20120000647 Blowout preventers and methods of use |
| 01/05/2012 | US20120000646 Blowout preventer monitoring system and method of using same |
| 01/05/2012 | US20120000645 Flow controller, particularly blowout preventer (BOP) and smart pipe plug (SPP) |
| 01/05/2012 | US20120000644 Fluorinated elastomeric blowout preventer packers and method |
| 01/05/2012 | DE102010025717A1 Verschließen und Abdichten eines Unterwasser-Bohrlochs Closing and sealing of the subsea borehole |
| 01/05/2012 | CA2840538A1 Sealing method and apparatus |
| 01/05/2012 | CA2804184A1 Wellbore control device |
| 01/05/2012 | CA2804028A1 Shape memory cement annulus gas migration prevention apparatus |
| 01/05/2012 | CA2803957A1 Oilfield equipment and related apparatus and method |
| 01/05/2012 | CA2803533A1 Blowout preventer monitoring system and method of using same |
| 01/05/2012 | CA2803129A1 Retrievable subsea device and method |
| 01/04/2012 | EP2402553A1 Downhole apparatus and support structure therefor |
| 01/04/2012 | EP2402552A1 Downhole apparatus and method |
| 01/04/2012 | EP2402551A1 Fluorinated elastomeric blowout preventer packers and method |
| 01/04/2012 | EP2402550A2 External position indicator of ram blowout preventer |
| 01/04/2012 | EP2402549A1 Downhole apparatus and method |
| 01/04/2012 | EP2402548A1 Downhole apparatus and method |
| 01/04/2012 | EP2402547A1 Downhole apparatus and method |
| 01/04/2012 | EP2401464A2 Sealing array for high temperature applications |
| 01/04/2012 | CN202100835U Detachable combination type self-sealing mechanism for oil well cable penetrator |
| 01/04/2012 | CN202100237U Electromagnetic heating and thermal insulation device of blowout preventer |
| 01/04/2012 | CN202100233U Self-locking rubber plug |
| 01/04/2012 | CN202100232U Excitation rubber plug |
| 01/04/2012 | CN202100231U Novel packer slip mechanism |
| 01/04/2012 | CN202100230U Large-radian arch-shaped sealing rubber cylinder |
| 01/04/2012 | CN202100229U Plane arc-shaped sealing rubber bucket |
| 01/04/2012 | CN202100228U Oil extraction testing blowout preventing device |
| 01/04/2012 | CN202100227U Outwards-hanging type telescopic blowout-preventive pipe |
| 01/04/2012 | CN202100226U Stress joint based on top tensioning type stand pipe |
| 01/04/2012 | CN202100220U Oil pipe and casing hanger with controllable sealing performance |
| 01/04/2012 | CN102305055A Air foam flooding shaft bottom foaming process pipe column |
| 01/04/2012 | CN102305049A Using method for inorganic particle plugging control agent for oil-water well |
| 01/04/2012 | CN102305048A Controlling the pressure within an annular volume of a wellbore |
| 01/04/2012 | CN102305047A Controlling the pressure within an annular volume of a wellbore |
| 01/04/2012 | CN102305046A Controlling the pressure within an annular volume of a wellbore |
| 01/04/2012 | CN102305045A Shaft crack simulator |
| 01/04/2012 | CN102305044A Flexible drilling-free self-grouting sealing box structure for tail pipe hanger |
| 01/04/2012 | CN102305043A Novel polish rod sealer |
| 01/04/2012 | CN102305042A Anti-freezing process for blowout-preventing pipe and cable matched with water injection well test |
| 01/04/2012 | CN101397896B Water-shutoff method for sealing gas well effluent section by combination of incline cement and gas injection compression |
| 01/04/2012 | CN101105117B Multifunctional spout stopper |
| 01/03/2012 | US8090227 Purging of fiber optic conduits in subterranean wells |
| 01/03/2012 | US8087466 Centralization and running tool and method |
| 01/03/2012 | US8087462 Process for transporting fracture (“FRAC”) fluid additives to oil and gas wells utilizing ion exchange resin |
| 01/03/2012 | US8087459 Packer providing multiple seals and having swellable element isolatable from the wellbore |
| 01/03/2012 | US8087458 Removable hydraulic-set packer |
| 01/03/2012 | CA2707738C Riser rotating control device |
| 01/03/2012 | CA2669778C Delaying swelling in a downhole packer element |
| 01/03/2012 | CA2663534C Retractable ball seat having a time delay material |
| 01/03/2012 | CA2660839C A fluid loss control system and method for controlling fluid loss |