| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/30/2008 | CN201013297Y Pump recovery well mis-pressing underbalanced pump operation environment protection spraying-proof apparatus |
| 01/30/2008 | CN201013296Y Rotating blowout preventer rubber core suspension adaptor |
| 01/30/2008 | CN201013295Y Double-purpose antimagnetic mine mouth device |
| 01/30/2008 | CN201013294Y Special tool for pressure-plugging oil-stolen orifice |
| 01/30/2008 | CN201013293Y Novel bias-adjustable well mouth |
| 01/30/2008 | CN201013292Y Bias-adjustable self-compensating sealer |
| 01/30/2008 | CN201013291Y Double-floating type packing box |
| 01/30/2008 | CN201013290Y Oil extraction injection-pumping packing box |
| 01/30/2008 | CN201013289Y Oil well burglarproof pipe plug |
| 01/30/2008 | CN201013288Y Steam-injection oil extraction dual-purpose mine mouth device |
| 01/30/2008 | CN101113663A Mechanical water-shutoff construction method of mine hydrophthalmos and plugging apparatus for water-shutoff |
| 01/29/2008 | US7322422 Inflatable packer inside an expandable packer and method |
| 01/29/2008 | US7322418 Continuous circulation drilling method |
| 01/29/2008 | US7322416 Methods of servicing a well bore using self-activating downhole tool |
| 01/29/2008 | US7322413 Equalizer valve assembly |
| 01/29/2008 | US7322412 Casing shoes and methods of reverse-circulation cementing of casing |
| 01/29/2008 | US7322410 Controllable production well packer |
| 01/29/2008 | US7322408 Downhole tool with actuable barrier |
| 01/29/2008 | US7322407 Wellhead isolation tool and method of fracturing a well |
| 01/29/2008 | CA2564290C Downhole sealing for production tubing |
| 01/29/2008 | CA2473015C Method and apparatus for treating a well |
| 01/29/2008 | CA2413070C Drillable bridge plug |
| 01/29/2008 | CA2356131C Downhole sealing for production tubing |
| 01/29/2008 | CA2334470C Method and system for moving equipment into and through a conduit |
| 01/29/2008 | CA2284639C Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/24/2008 | WO2008011331A1 Pressure energized radial seal |
| 01/24/2008 | WO2008011280A1 Flow diverter tool assembly and methods of using same |
| 01/24/2008 | WO2008011189A1 Packer variable volume excluder and sampling method therefor |
| 01/24/2008 | WO2008009957A1 Improved methods and materials for subterranean fluid forming barriers in materials surrounding wells |
| 01/24/2008 | WO2008009955A1 Method for removing a sealing plug from a well |
| 01/24/2008 | US20080020961 Low Molecular Weight Graft Copolymers |
| 01/24/2008 | US20080017814 Pressure energized radial seal |
| 01/24/2008 | US20080017416 Method of drilling from a shaft for underground recovery of hydrocarbons |
| 01/24/2008 | US20080017390 Isolation tool |
| 01/24/2008 | US20080017387 Methods for expanding tubular strings and isolating subterranean zones |
| 01/24/2008 | US20080017386 Externally activated seal system for wellhead |
| 01/24/2008 | US20080017383 Collapse arrestor tool |
| 01/24/2008 | US20080017379 Method for removing a sealing plug from a well |
| 01/24/2008 | US20080017377 Well fluid formulation and method |
| 01/24/2008 | US20080017376 Swellable Elastomers and Associated Methods |
| 01/24/2008 | US20080017375 Apparatus and Method for Use in a Well Bore |
| 01/24/2008 | US20080017374 Methods and materials for subterranean fluid forming barriers in materials surrounding wells |
| 01/24/2008 | US20080017368 Well Operations System |
| 01/24/2008 | CA2658669A1 Pressure energized radial seal |
| 01/23/2008 | EP1881017A2 Sulfonated graft copolymers |
| 01/23/2008 | EP1881016A2 Low molecular weight graft copolymers |
| 01/23/2008 | EP1781897A4 Shearing sealing ram |
| 01/23/2008 | CN201011300Y Hydraulic pumping blowout preventer |
| 01/23/2008 | CN101111661A Method of installing an expandable tubular in a wellbore |
| 01/23/2008 | CN101111660A Blowout preventer and locking mechanism |
| 01/23/2008 | CN101109281A High-temperature high-pressure clay cake interface agglutination simulating-estimating device |
| 01/23/2008 | CN101109277A Buoyant device used for blowout preventer in deepwater drilling water |
| 01/23/2008 | CN101109269A Deepwater drilling device based on near surface deviation |
| 01/22/2008 | US7320367 Annular isolators for expandable tubulars in wellbores |
| 01/22/2008 | CA2565917C Wellbore packer with movable tube |
| 01/22/2008 | CA2496036C High expansion sealing device with leak path closures |
| 01/22/2008 | CA2494484C Annular barrier tool |
| 01/22/2008 | CA2475671C Method of repair of collapsed or damaged tubulars downhole |
| 01/22/2008 | CA2349988E Polish rod locking clamp |
| 01/17/2008 | WO2008008687A1 Delaying swelling in a downhole packer element |
| 01/17/2008 | WO2008008684A1 Closeable open cell foam for downhole use |
| 01/17/2008 | US20080011489 Cup tool, cup tool cup and method of using the cup tool |
| 01/17/2008 | US20080011488 Extruded and configured lathe-cut packer elements |
| 01/17/2008 | US20080011482 Systems for Reverse-Circulation Cementing in Subterranean Formations |
| 01/17/2008 | US20080011481 Methods for Reverse-Circulation Cementing in Subterranean Formations |
| 01/17/2008 | US20080011480 Downhole surge pressure reduction and filtering apparatus |
| 01/17/2008 | US20080011479 Wellbore plug |
| 01/17/2008 | US20080011478 Methods and Compositions for Controlling Formation Fines and Reducing Proppant Flow-Back |
| 01/17/2008 | US20080011473 Delaying swelling in a downhole packer element |
| 01/17/2008 | US20080011471 Low pressure-set packer |
| 01/17/2008 | US20080011469 Fracturing isolation sleeve |
| 01/17/2008 | CA2656831A1 Apparatus and method for mixing fluids at the surface for subterranean treatments |
| 01/16/2008 | EP1877645A1 Annular packer device |
| 01/16/2008 | CN201007194Y Anti-jack device special for drill plug |
| 01/16/2008 | CN201007193Y Casing tube anti-theft well mouth cap |
| 01/16/2008 | CN201007192Y High pressure blowout prevention polish rod sealer |
| 01/16/2008 | CN201007191Y Well head matching bearing |
| 01/16/2008 | CN101107422A Methods for prodcing fluids from acidized and consolidated portions of subterranean formations |
| 01/16/2008 | CN101107418A System and method for making hydrocarbon |
| 01/16/2008 | CN101105117A Multifunctional spout stopper |
| 01/15/2008 | US7318482 Balanced continuous well string injection unit |
| 01/15/2008 | US7318480 Tubing running equipment for offshore rig with surface blowout preventer |
| 01/15/2008 | US7318479 Assembly for connecting a jumper to a subsea structure |
| 01/15/2008 | US7318478 Downhole ball circulation tool |
| 01/15/2008 | CA2528973C Expansion set packer |
| 01/15/2008 | CA2187432C Production wells having permanent downhole formation evaluation sensors |
| 01/10/2008 | WO2008003184A1 Method for sealing the walls of deep drilled hole |
| 01/10/2008 | US20080006412 Adapter sleeve for wellhead housing |
| 01/10/2008 | US20080006411 Electric-hydraulic power unit |
| 01/10/2008 | US20080006406 Introducing a preflush fluid comprising an oil-soluble diverting agent into a portion of a subterranean formation; introducing a resin and an aqueous soluble diverting agent into subterranean formation; allowing the oil-soluble diverting agent to at least partially dissolve; allowing resin to consolidate |
| 01/10/2008 | US20080006405 Methods and compositions for enhancing proppant pack conductivity and strength |
| 01/10/2008 | US20080006404 Storable nonaqueous cement slurries and methods of using same |
| 01/10/2008 | US20080006403 Pump-down pressure plug |
| 01/10/2008 | CA2656619A1 Method for improved well control with a downhole device |
| 01/09/2008 | EP1875323A1 Control system design for a mixing system with multiple inputs |
| 01/09/2008 | CN201003392Y Polished rod centralizing sealer |
| 01/09/2008 | CN201003391Y Multifunctional polish rod sealing device |
| 01/09/2008 | CN201003390Y Screwed plug for preventing gas-theft |
| 01/09/2008 | CN201003389Y Blowout prevention on-off connector |
| 01/09/2008 | CN201003372Y Modular drilling machine |