| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 02/13/2013 | EP2557266A1 Downhole swivel apparatus and method |
| 02/13/2013 | EP2556207A1 Underwater device and method for blocking outflow a fluid like oil or gas by an underwater well |
| 02/13/2013 | CN202731864U Rupture-proof packing tool |
| 02/13/2013 | CN202731842U Injection valve capable of throwing and salvaging for injecting chemical agent |
| 02/13/2013 | CN202731840U Antitheft sample valve for wellhead of oil well |
| 02/13/2013 | CN202731833U Novel float collar float shoe |
| 02/13/2013 | CN202731832U Grouting pipe for underground water plugging |
| 02/13/2013 | CN202731831U High-temperature-resistant and high-pressure-resistant well packer for offshore oil |
| 02/13/2013 | CN202731830U Removable and drillable type packer for oil well |
| 02/13/2013 | CN202731829U Sealer for non-well-killing operation |
| 02/13/2013 | CN202731828U Oil layer anti-leakage device |
| 02/13/2013 | CN202731827U Multilayer injector fusing type oil pipe blanking plug |
| 02/13/2013 | CN202731826U Constant-pressure opening blanking plug used for separated-layer water injection |
| 02/13/2013 | CN202731825U Core shaft type closed oil pipe shoe |
| 02/13/2013 | CN202731824U Annular mud flow guide device for steam injection wellhead |
| 02/13/2013 | CN202731823U Casing hanger and sealing lowering tool for ocean deepwater well drilling |
| 02/13/2013 | CN202731822U Compensation type thermal recovery casing head |
| 02/13/2013 | CN202731821U Casing connection device for thermal production well head |
| 02/13/2013 | CN202731820U Combination device for jackscrew-free composite sealed casing head |
| 02/13/2013 | CN202731819U Single-grade clip type casing head |
| 02/13/2013 | CN202731818U Novel casing head |
| 02/13/2013 | CN202731817U Novel lubricating polish rod sealer |
| 02/13/2013 | CN202731816U Self-sealing spherical blowout preventer |
| 02/13/2013 | CN202731815U Oil well head security sampler |
| 02/13/2013 | CN202731814U Self-lubricating packing box for oil production wellhead |
| 02/13/2013 | CN202731813U Anti-theft plug |
| 02/13/2013 | CN202731812U Blowout prevention case of air-tight seal drill pipe |
| 02/13/2013 | CN202731811U Polished rod eccentric wear preventing sealing packing box for oil pumping well |
| 02/13/2013 | CN202731810U Polished rod break off blowout preventing connector of rod-pumped well |
| 02/13/2013 | CN202731809U Multifunctional well-shut and anti-theft well mouth |
| 02/13/2013 | CN202731808U Flow guide type high-pressure oil cup of oil-water well test |
| 02/13/2013 | CN202731773U Double-eccentric correction device of well opening packaging box |
| 02/13/2013 | CN202731772U Clamping claw and support ring control suspended type blowout prevention connecting-tripping device |
| 02/13/2013 | CN202731760U Hot-water-injection high-pressure insulating tubular column |
| 02/13/2013 | CN202730778U Well sealing structure of relief well in foundation pit |
| 02/13/2013 | CN102926701A Continuous mixing type water plugging technique |
| 02/13/2013 | CN102926700A Grouting bag type hole packer with multi-section seal |
| 02/13/2013 | CN102926699A Pipeline plugging device for heavy oil thermal production wells |
| 02/13/2013 | CN102926698A Rotary control device |
| 02/13/2013 | CN102926697A Orifice plugging device, gas extraction system and orifice plugging method |
| 02/13/2013 | CN102926693A Method for plugging and reloading wellhead by using oil pipe plugging device |
| 02/13/2013 | CN102925124A Temporary plugging composition of oil layer and application method |
| 02/13/2013 | CN102061899B Hydraulic pressure balance work over rig |
| 02/13/2013 | CN101967966B Anti-sand burying salvaging single-rubber barrel downhole choke |
| 02/13/2013 | CN101629480B Inner blowout preventer of full-port drilling tool |
| 02/13/2013 | CN101592023B Thermal production snubbing device |
| 02/12/2013 | US8372787 Electrically and/or magnetically active coated fibres for wellbore operations |
| 02/12/2013 | US8371385 Christmas tree and wellhead design |
| 02/12/2013 | US8371384 Methods for strengthening fractures in subterranean formations |
| 02/12/2013 | US8371382 Methods relating to improved stimulation treatments and strengthening fractures in subterranean formations |
| 02/12/2013 | US8371381 Engineered fibers for well treatments |
| 02/12/2013 | US8371374 Sealing feed through lines for downhole swelling packers |
| 02/12/2013 | US8371373 Method and apparatus for plugging leaking oil and gas wells |
| 02/12/2013 | US8371370 Apparatus for isolating and completing multi-zone frac packs |
| 02/12/2013 | CA2701883C Water sensing adaptable in-flow control device and method of use |
| 02/12/2013 | CA2632319C Method for applying remedial cement to a wellbore |
| 02/09/2013 | CA2748207A1 Anti-rotation device for wellhead stuffing box |
| 02/07/2013 | WO2013019721A2 Recovery valve |
| 02/07/2013 | WO2013016822A1 Wellbore tool with indexing mechanism and method |
| 02/07/2013 | WO2012173834A3 Temperature resistant downhole elastomeric device |
| 02/07/2013 | WO2012025713A3 Preloading device |
| 02/07/2013 | US20130032361 Recovery Valve |
| 02/07/2013 | US20130032360 Alignment of bop stack to facilitate use of a rotating control device |
| 02/07/2013 | US20130032359 Rotating head |
| 02/07/2013 | US20130032353 Hydrocarbon Recovery Drill String Apparatus, Subterranean Hydrocarbon Recovery Drilling Methods, and Subterranean Hydrocarbon Recovery Methods |
| 02/07/2013 | US20130032347 Method for Generating Discrete Fracture Initiation Sites and Propagating Dominant Planar Fractures Therefrom |
| 02/07/2013 | US20130032327 Method and apparatus for launching multiple balls in a well |
| 02/07/2013 | CA2844342A1 Wellbore tool with indexing mechanism and method |
| 02/06/2013 | EP2553213A2 Convertible downhole isolation plug |
| 02/06/2013 | EP2553212A1 Device for a plug construction for conducting well tests |
| 02/06/2013 | CN202718672U Packer experiment shaft based on high-temperature and high-pressure environment |
| 02/06/2013 | CN202718666U Plug-in coiled tubing induced-spraying device |
| 02/06/2013 | CN202718660U Separate exploitation and joint exploitation tubular column in screen-pipe completed horizontal well |
| 02/06/2013 | CN202718659U Full-bore type blowout prevention valve |
| 02/06/2013 | CN202718658U Modularized double-machine double-pump well cementation cement sled |
| 02/06/2013 | CN202718657U Packer |
| 02/06/2013 | CN202718656U Step-by-step deblocking and water plugging technique pipe of bridge plug |
| 02/06/2013 | CN202718655U Accurate quantification injection seal-examination integrated tubular column |
| 02/06/2013 | CN202718654U 封隔器 Packer |
| 02/06/2013 | CN202718653U C-shaped plate for lifting well mouth |
| 02/06/2013 | CN202718652U Pipe column coupling safety pouring automatic control device for pressure operation device |
| 02/06/2013 | CN202718651U Under-pressure operating device for automatically and safely reversing pipe column coupling |
| 02/06/2013 | CN202718650U Offshore oil and gas field wellhead quick connecting device |
| 02/06/2013 | CN202718630U Well cementation cement head fast connecting clamp hoop |
| 02/06/2013 | CN102918227A Convertible downhole isolation plug |
| 02/06/2013 | CN102913273A Autonomous dynamic sealing and gas extraction intelligent system for coal mine |
| 02/06/2013 | CN102913185A Cement slurry backflow restraining device |
| 02/06/2013 | CN102913184A Secondary composite high-pressure grouting and sealing process of gas drainage drilling artificial separation barrier |
| 02/06/2013 | CN102913183A Multifunctional pneumatic sealing device and matched sealing process thereof |
| 02/06/2013 | CN102913182A Slip type puller damper |
| 02/06/2013 | CN102913181A Throwing type washable downhole pressure-bearing plugging device and plugging method thereof |
| 02/06/2013 | CN102913180A Disconnecting device |
| 02/06/2013 | CN102913179A Blowout preventer for manual pumping rod |
| 02/06/2013 | CN102913178A Underwater wellhead connecting device for marine oil and gas wells |
| 02/06/2013 | CN102913177A Template type underwater dry-type well head structure |
| 02/06/2013 | CN102913176A Metal seal structure |
| 02/06/2013 | CN102913175A Oil well plugging device |
| 02/05/2013 | US8366114 Stuffing box cooling system |
| 02/05/2013 | US8365835 Method and downhole tool actuator |
| 02/05/2013 | US8365830 Multi-deployable subsea stack system |