| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/05/2008 | CN201031655Y Pumping well adjustable polarization rod seal device |
| 03/05/2008 | CN201031654Y Upper hanging universal adaptor |
| 03/05/2008 | CN201031653Y Lower hanging universal adaptor |
| 03/05/2008 | CN201031652Y Double tube mouth stuffing type sealing device |
| 03/05/2008 | CN201031651Y Grief stem well head rotary sealing device |
| 03/05/2008 | CN201031650Y Pumping rod blowout preventer |
| 03/05/2008 | CN201031649Y B grade deviation correcting packing kit |
| 03/05/2008 | CN201031648Y Auto-compensation conical packing kit |
| 03/05/2008 | CN201031647Y Stop production well head packer |
| 03/05/2008 | CN201031646Y Improved oil production screw pump blowout preventer high voltage isolation device |
| 03/05/2008 | CN201031645Y Well head thermal expansion compensator |
| 03/05/2008 | CN201031644Y Open type fully floating deviation correcting packing kit |
| 03/05/2008 | CN101135237A Method for preparing down-hole gel valve and construction method thereof |
| 03/05/2008 | CN101135236A Collectively monitored throttling and controlling device |
| 03/04/2008 | US7338925 Chabazite or clinoptilolite with a particle size of 1.0 to 10 microns, activator (calcium hydroxide), and organic acid or salt (acetic, citric, tartaric, or gluconic acids); wellbore treating fluids |
| 03/04/2008 | US7338923 Settable drilling fluids comprising cement kiln dust |
| 03/04/2008 | US7338027 Fluid saving blowout preventer operator system |
| 03/04/2008 | US7337851 Rotating stuffing box with split standpipe |
| 03/04/2008 | US7337842 Above ground or subterranean formation cementing using partially calcined kiln feed that is removed from a gas stream and collected in a dust collector during the manufacture of cement and soluble phosphate |
| 03/04/2008 | US7337841 Casing comprising stress-absorbing materials and associated methods of use |
| 03/04/2008 | US7337840 One trip liner conveyed gravel packing and cementing system |
| 02/29/2008 | CA2599802A1 Downhole isolation valve and methods for use |
| 02/29/2008 | CA2560229A1 Pipe guides and methods of guiding pipes in snubbing units |
| 02/28/2008 | WO2008024645A2 Autonomous inflow restrictors for use in a subterranean well |
| 02/28/2008 | WO2008024265A2 Dual-cylinder blowout preventer operator system |
| 02/28/2008 | WO2008024264A2 Fluid saving blowout preventer operator system |
| 02/28/2008 | WO2008024257A2 Blowout preventer operator locking system |
| 02/28/2008 | WO2008023203A1 Flow block |
| 02/28/2008 | US20080048140 Fluid saving blowout preventer operator system |
| 02/28/2008 | US20080048139 Dual-cylinder blowout preventer operator system |
| 02/28/2008 | US20080047749 Methods and apparatus for applying torque and rotation to connections |
| 02/28/2008 | US20080047717 Method and apparatus for stimulating hydrocarbon wells |
| 02/28/2008 | US20080047714 High pressure large bore utility line connector assembly |
| 02/28/2008 | US20080047709 Method for Controlling Water Influx Into Wellbores by Blocking High-Permeability Channels |
| 02/28/2008 | US20080047708 Method and apparatus for plugging perforations |
| 02/28/2008 | US20080047704 Expandable slip ring |
| 02/28/2008 | CA2658943A1 Composition and method for using waxy oil-external emulsions to modify reservoir permeability profiles |
| 02/27/2008 | EP1892372A1 Flow block |
| 02/27/2008 | EP1891296A2 Packer with positionable collar |
| 02/27/2008 | EP1743083B1 Wellbore control device |
| 02/27/2008 | CN201027529Y Automatic fill-up float collar of casing tube |
| 02/27/2008 | CN201027528Y Multifunctional releasing hydraulic packer |
| 02/27/2008 | CN201027527Y Plugging device |
| 02/27/2008 | CN201027526Y Supercharging equilibration packer |
| 02/27/2008 | CN201027525Y Novel glue barrel |
| 02/27/2008 | CN201027524Y Starter of packer with large drift diameter |
| 02/27/2008 | CN201027523Y Blowout preventer for drilling rod pulling out of drilling hole |
| 02/27/2008 | CN201027522Y Well head device for double-pipe thermal oil-extraction |
| 02/27/2008 | CN201027521Y Split type packing device for drilling test |
| 02/27/2008 | CN201027520Y Winding type polished rod sealer |
| 02/27/2008 | CN201027519Y Slope mouth oriented fluid director of workover |
| 02/27/2008 | CN201027518Y Self-sealing blowout preventer |
| 02/27/2008 | CN201027517Y Oil-extracting well head device of inclined shaft |
| 02/27/2008 | CN201027516Y Screw pump wellhead device |
| 02/27/2008 | CN101133231A Degradable polymers for wellbore fluids and processes |
| 02/27/2008 | CN101131072A Encrypted sealing joint for oil gas well |
| 02/27/2008 | CN101131071A Liquid fill adapter for gas well |
| 02/26/2008 | US7334650 Apparatus and methods for drilling a wellbore using casing |
| 02/26/2008 | US7334639 In-situ solidification of invert emulsion fluids to form gas tight annular barrier |
| 02/26/2008 | US7334638 Methods of improving the shelf life of a cement composition comprising a coated gas-generating material |
| 02/26/2008 | US7334637 Assembly and method for determining thermal properties of a formation and forming a liner |
| 02/26/2008 | US7334634 High pressure adaptor assembly for use on blow out preventors |
| 02/26/2008 | US7334633 Stripper rubber adapter |
| 02/26/2008 | CA2376211C Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 02/26/2008 | CA2350545C Cementation product and use for cementing oil wells or the like |
| 02/23/2008 | CA2558115A1 Mechanical setting tool for an expandable packer |
| 02/21/2008 | WO2008021328A2 Position indicator for a blowout preventer |
| 02/21/2008 | WO2008020759A1 Sealing device |
| 02/21/2008 | WO2008020232A2 Wellhead assembly |
| 02/21/2008 | WO2008020226A1 Turbulent flow tool |
| 02/21/2008 | WO2007136978A3 Dropping sub method and apparatus |
| 02/21/2008 | WO2007021422A3 Triple valve blow out preventer |
| 02/21/2008 | US20080042362 Closeable open cell foam for downhole use |
| 02/21/2008 | US20080041631 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 02/21/2008 | US20080041595 Fluid loss control system and method for controlling fluid loss |
| 02/21/2008 | US20080041591 Methods of Using Casing Strings in Subterranean Cementing Operations |
| 02/21/2008 | US20080041590 Methods for Reverse-Circulation Cementing in Subterranean Formations |
| 02/21/2008 | US20080041581 Apparatus for controlling the inflow of production fluids from a subterranean well |
| 02/21/2008 | US20080041580 Autonomous inflow restrictors for use in a subterranean well |
| 02/21/2008 | US20080041578 Seal configuration for top drive swivel apparatus and method |
| 02/21/2008 | CA2656827A1 Sealing device |
| 02/20/2008 | EP1888875A1 Packer-anchoring device |
| 02/20/2008 | EP1888874A1 Rod lock for ram blowout preventers |
| 02/20/2008 | CN201025025Y High-layer oil exploration and sealing verification assembly |
| 02/20/2008 | CN201025014Y Under-well dual-layer distribution water supply device |
| 02/20/2008 | CN201025007Y Two-section hierarchical high pressure filling and sand prevention tool |
| 02/20/2008 | CN201025006Y Once extrusion and cycling filling tool for high pressure sealing |
| 02/20/2008 | CN201024999Y Middle and low voltage gas collection device |
| 02/20/2008 | CN201024987Y Separated multi-channel rotary valve |
| 02/20/2008 | CN201024984Y Automatic control tube assembly for surrounding air pressure |
| 02/20/2008 | CN201024982Y A concrete extrusion and injection control tool |
| 02/20/2008 | CN201024981Y Physical leakage and lockage prevention under-well toll with a driller |
| 02/20/2008 | CN201024980Y An oil field well fixing and self irrigation collision assembly |
| 02/20/2008 | CN201024979Y Air flow blocker |
| 02/20/2008 | CN201024978Y A fixing device for hierarchical concrete injection tool |
| 02/20/2008 | CN201024977Y A multi-function concrete injection well fixing device |
| 02/20/2008 | CN201024976Y An automatic close hydraulic pressure hierarchical concrete injection well fixing device |
| 02/20/2008 | CN201024975Y Rotary expansion sealing multi-time sealing and unsealing tool |
| 02/20/2008 | CN201024974Y Sealer for cable penetrating under well |
| 02/20/2008 | CN201024973Y Expansion pressure crack tool |