| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/13/2013 | CN102966328A Novel electro-hydraulic integral bridge plug release tool |
| 03/13/2013 | CN102966327A Expansion pipe |
| 03/13/2013 | CN102966315A Continuous pumping oil rod device |
| 03/13/2013 | CN102518432B Test device capable of simulating plugging of high temperature and high pressure dropping strata |
| 03/13/2013 | CN101906946B Hydraulic expansion-type rotary liner hanger |
| 03/13/2013 | CN101532600B Method for leak stoppage of solid expansion pipe |
| 03/13/2013 | CN101316981B Packer cups for use inside a wellbore |
| 03/12/2013 | US8394744 Low density cementitious compositions |
| 03/12/2013 | US8393411 Method for controlling loss of drilling fluid |
| 03/12/2013 | US8393400 Metal-to-metal seal with wiper element and wellhead system incorporating same |
| 03/12/2013 | US8393394 Methods for strengthening fractures in subterranean formations |
| 03/12/2013 | US8393391 Dry cement formulation for cementing holes in the earth |
| 03/12/2013 | US8393388 Retractable petal collet backup for a subterranean seal |
| 03/12/2013 | CA2668552C Spring energized debris barrier for mechanically set retrievable packer |
| 03/12/2013 | CA2545565C Device which is expandable to engage the interior of a tube |
| 03/07/2013 | WO2013033531A1 Downhole sealing system using cement activated material and method of downhole sealing |
| 03/07/2013 | WO2013033286A1 Liner wiper plug with bypass option |
| 03/07/2013 | WO2013032856A1 Sealing system, method of manufacture thereof and articles comprising the same |
| 03/07/2013 | WO2013030681A2 Wave-inducing device, casing system and method for cementing a casing in a borehole |
| 03/07/2013 | WO2013030599A1 A connector arrangement for a subsea pipeline |
| 03/07/2013 | WO2013030284A1 Annular barrier with compensation device |
| 03/07/2013 | WO2013030283A1 Annular barrier with pressure amplification |
| 03/07/2013 | WO2013002848A3 Extrusion-resistant seals for expandable tubular assembly |
| 03/07/2013 | WO2012112825A3 Anchoring seal |
| 03/07/2013 | WO2012090050A4 Downhole packer tool with safety systems for preventing undue set and release operations |
| 03/07/2013 | WO2012025714A3 Subsea running tool with emergency release |
| 03/07/2013 | WO2011150223A3 Method and apparatus for maintaining pressure in well cement during curing |
| 03/07/2013 | US20130056274 Underwater stuffing box and method for running a drill string through the stuffing box |
| 03/07/2013 | US20130056228 Annular Seal for Expanded Pipe with One Way Flow Feature |
| 03/07/2013 | US20130056227 Swell-based inflation packer |
| 03/07/2013 | US20130056226 Diverter spool and methods of using the same |
| 03/07/2013 | US20130056218 Riserless single trip hanger and packoff running tool |
| 03/07/2013 | US20130056207 Downhole sealing system using cement activated material and method of downhole sealing |
| 03/07/2013 | US20130056206 Valve for hydraulic fracturing through cement outside casing |
| 03/07/2013 | US20130056200 Hydraulic Deployment Of A Well Isolation Mechanism |
| 03/07/2013 | US20130056198 Enhanced geothermal systems and reservoir optimization |
| 03/07/2013 | CA2846636A1 Liner wiper plug with bypass option |
| 03/07/2013 | CA2846458A1 A connector arrangement for a subsea pipeline |
| 03/07/2013 | CA2846101A1 Wave-inducing device, casing system and method for cementing a casing in a borehole |
| 03/07/2013 | CA2845495A1 Annular barrier with compensation device |
| 03/07/2013 | CA2845366A1 Downhole sealing system using cement activated material and method of downhole sealing |
| 03/06/2013 | EP2565369A1 Annular barrier with compensation device |
| 03/06/2013 | EP2565368A1 Annular barrier with pressure amplification |
| 03/06/2013 | EP2565367A1 Subsea docking station |
| 03/06/2013 | EP2565366A2 Method, device and system for monitoring subsea components |
| 03/06/2013 | EP2564017A1 Stuffing box for a fluid production well, and associated surface assembly |
| 03/06/2013 | CN202767963U Eccentric bottom-hole regulator |
| 03/06/2013 | CN202767961U Separated recovery device capable of adjusting layers arbitrarily |
| 03/06/2013 | CN202767957U Fracture high pressure packing and filling mechanism |
| 03/06/2013 | CN202767942U Difunctional release bridge plug for horizontal well |
| 03/06/2013 | CN202767941U Cementing truck for random injection allocation of liquid-solid-gas three-phase water slurry |
| 03/06/2013 | CN202767940U Self-service slurry grouting device |
| 03/06/2013 | CN202767939U Shut-in well device capable of achieving shut-in well under oil field well |
| 03/06/2013 | CN202767938U Adjustable plug |
| 03/06/2013 | CN202767937U Novel blowout preventer hydraulic locking device |
| 03/06/2013 | CN202767936U Controllable blowout preventer of pumping well |
| 03/06/2013 | CN202767935U Automatic blowout-prevention deviation-adjusting packer |
| 03/06/2013 | CN202767934U Clamp connection type well shutting device |
| 03/06/2013 | CN202767933U Adjustable higher pressure self-sealing device |
| 03/06/2013 | CN202762270U Gas-slag separation device and blowout prevention system |
| 03/06/2013 | CN102959178A Shape memory cement annulus gas migration prevention apparatus |
| 03/06/2013 | CN102953752A Sealing method of water-containing drill hole for gas extraction |
| 03/06/2013 | CN102953727A System and method for measuring subsurface gas pressure of coal mine |
| 03/06/2013 | CN102953707A Top-drive drill rod well cementing head |
| 03/06/2013 | CN102953706A Washable well packer for realizing underground secondary setting |
| 03/06/2013 | CN102953705A Method of step-by-step setting in layered construction |
| 03/06/2013 | CN102953704A Thick-oil thermal recovery device in oil fieldSelf-sealing type thermal recovery packer. |
| 03/06/2013 | CN102953703A BOP (blow out preventer) moving device applied to deep sea floating drilling |
| 03/06/2013 | CN102953702A Horizontal well logging hanging unlocking device |
| 03/06/2013 | CN102953698A Expansion-type rotatable tail pipe hanger |
| 03/06/2013 | CN102952527A Asphalt water-based drilling fluid additive and preparation method thereof |
| 03/06/2013 | CN101979820B Process for sealing elevation drill hole water-stopping sleeves |
| 03/06/2013 | CN101892839B Method for formation evaluation |
| 03/05/2013 | US8387710 Downhole fluid recirculation valve and method for recirculating fluid in a well |
| 03/05/2013 | US8387702 Multicoupler |
| 03/05/2013 | US8387701 Intervention system dynamic seal and compliant guide |
| 03/05/2013 | US8387695 Compositions and processes for downhole cementing operations |
| 03/05/2013 | US8387694 Methods for placement of sealant in subterranean intervals |
| 03/05/2013 | US8387693 Systems and methods for using a passageway through subterranean strata |
| 03/05/2013 | US8387688 Method of forming subterranean barriers with molten wax |
| 03/05/2013 | CA2500520C System and method to seal using a swellable material |
| 02/28/2013 | WO2013028799A2 Downhole tool and method of use |
| 02/28/2013 | WO2013028517A2 Universal pipe thread protector |
| 02/28/2013 | WO2013028446A1 Subsea electro-optical connector unit for electro-optical ethernet transmission system |
| 02/28/2013 | WO2013028384A2 Surface controlled subsurface safety valve |
| 02/28/2013 | WO2013028383A2 Chemical injection system |
| 02/28/2013 | WO2013028342A2 Completing underwater wells |
| 02/28/2013 | WO2013028332A1 Degradable slip element |
| 02/28/2013 | WO2013028329A2 Systems and methods for gravel packing wells |
| 02/28/2013 | WO2013028079A1 Sealing device for well components |
| 02/28/2013 | WO2013027081A1 A subsea wellhead assembly, a subsea installation using said wellhead assembly, and a method for completing a wellhead assembly |
| 02/28/2013 | WO2013002986A3 Permeable material compacting method and apparatus |
| 02/28/2013 | WO2012167240A3 Sealing devices for sealing inner wall surfaces of a wellbore and methods of installing same in a wellbore |
| 02/28/2013 | WO2012118772A3 Metal expandable element back-up ring for high pressure/high temperature packer |
| 02/28/2013 | WO2012112823A3 Stage tool |
| 02/28/2013 | WO2012103474A3 Improving diversion by combining dissolvable and degradable particles and fibers |
| 02/28/2013 | WO2012090051A4 Downhole packer tool with dummy slips |
| 02/28/2013 | US20130048314 Downhole tool and method of use |
| 02/28/2013 | US20130048313 Downhole tool and method of use |
| 02/28/2013 | US20130048312 Pipe End Plug Apparatus and Method |