| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/17/2008 | US20080087430 Double swivel apparatus and method |
| 04/17/2008 | US20080087423 Method and Apparatus for a Monodiameter Wellbore, Monodiameter Casing, Monobore, and/or Monowell |
| 04/17/2008 | US20080087418 Pipeline |
| 04/17/2008 | US20080087417 Downhole tools having a seal ring with reinforcing element |
| 04/17/2008 | US20080087416 Casing Shoes and Methods of Reverse-Circulation Cementing of Casing |
| 04/17/2008 | US20080087415 Hybrid wellhead system and method of use |
| 04/16/2008 | EP1581718B1 Anchoring device for a wellbore tool |
| 04/16/2008 | CN201047292Y Plugging apparatus for mechanical water-shutoff construction of mine lane oculus elephantinus |
| 04/16/2008 | CN201047268Y Anti-jack packer |
| 04/16/2008 | CN201047267Y Oil gas well emergency casing head |
| 04/16/2008 | CN201047266Y Double tube blowout preventer |
| 04/16/2008 | CN201047265Y Oil pumping motor-pumped well elastic dynamic seal well head sealing device |
| 04/16/2008 | CN201047264Y Multifunctional oil well protecting equipment |
| 04/16/2008 | CN101161983A Method for improving cementing plugging effect |
| 04/16/2008 | CN101161982A Hydraulic buckling type tail pipe hanger |
| 04/16/2008 | CN101161981A Hydraulic mechanical double-action buckling type tail pipe hanger |
| 04/15/2008 | US7357190 Radial expansion of tubular members |
| 04/15/2008 | US7357189 Seal |
| 04/15/2008 | US7357188 Mono-diameter wellbore casing |
| 04/15/2008 | US7357187 BOP conversion apparatus |
| 04/15/2008 | US7357185 Subsea tubing hanger assembly for an oil or gas well |
| 04/15/2008 | US7357181 Apparatus for autofill deactivation of float equipment and method of reverse cementing |
| 04/15/2008 | US7357177 Restriction tolerant packer cup |
| 04/15/2008 | CA2527387C Seal or fluid barrier using strands |
| 04/15/2008 | CA2385474C Method and plugging material for reducing formation fluid migration in wells |
| 04/15/2008 | CA2225570C Method and apparatus for making a pig in a vertical riser pipe |
| 04/10/2008 | WO2008041006A1 Methods and apparatus for reverse circulation cementing of casing strings in wellbores |
| 04/10/2008 | US20080083535 Methods and Apparatus for Completion of Well Bores |
| 04/09/2008 | WO2008104675A1 Mandrel and associated positioning method |
| 04/09/2008 | EP1907665A1 Sealing material used for building wells and filling underground hollow spaces, especially deep boreholes |
| 04/09/2008 | EP1907664A1 System and method for dynamic sealing around a drill stem |
| 04/09/2008 | EP1907663A1 Dth-hammer drilling device and overburden drilling method |
| 04/09/2008 | EP1563161B1 Re-entry in multilateral wellbores |
| 04/09/2008 | CN201045288Y Controllable type amplificate packer |
| 04/09/2008 | CN201045287Y injection-extraction integrated well head device |
| 04/09/2008 | CN201045286Y Novel test blowout preventer |
| 04/09/2008 | CN201045285Y Dropping in and taking off type theft preventing installation |
| 04/09/2008 | CN101158281A Cement through side pocket mandrel |
| 04/09/2008 | CN101158280A Oil well high water-bearing layer pressure blocking method |
| 04/09/2008 | CN101158279A Novel SAGD process thermal recovery well head device |
| 04/09/2008 | CN101158278A Novel thermal recovery well head device |
| 04/09/2008 | CN101158277A Multifunctional polish rod sealing device |
| 04/09/2008 | CN100379937C Device for harnessing bittern burst of brine well by blasting |
| 04/08/2008 | US7354026 Unitary blade seal for a shearing blind ram in a ram type blowout preventer |
| 04/08/2008 | US7353887 Control systems and methods for active controlled bottomhole pressure systems |
| 04/08/2008 | US7353879 Biodegradable downhole tools |
| 04/08/2008 | US7353878 Apparatus and method for wellbore isolation |
| 04/08/2008 | US7353870 cementing with an additive comprising at least one material selected shale, zeolite, slag cement, metakaolin into a well bore or in a subterranean formation; vitrified shale provides compressive strengths; free of Portland cement to reduce cost, eliminate waste |
| 04/08/2008 | CA2616182A1 Dual-stage valve straddle packer for selective stimulation of wells |
| 04/08/2008 | CA2534307C Fracturing isolation sleeve |
| 04/08/2008 | CA2518283C Pressure activated release member for an expandable drillbit |
| 04/08/2008 | CA2517410C Automated chemical stick loader for gas wells and method of loading |
| 04/08/2008 | CA2326995C Rotating casing assembly and method |
| 04/03/2008 | WO2008039801A1 Reinforcement of irregular pressure vessels |
| 04/03/2008 | WO2008039589A1 Annular bop packing unit |
| 04/03/2008 | WO2008037730A1 Method and assembly for producing oil and/or gas through a well traversing stacked oil and/or gas bearing earth layers |
| 04/03/2008 | WO2008020232A3 Wellhead assembly |
| 04/03/2008 | WO2007140266A3 Configurable wellbore zone isolation system and related methods |
| 04/03/2008 | US20080078561 Swellable Packer Construction |
| 04/03/2008 | US20080078553 Downhole isolation valve and methods for use |
| 04/03/2008 | US20080078550 Prevention of latex inversion in saltwater cement compositions for use in subterranean formations and associated methods |
| 04/03/2008 | US20080078081 High pressure-rated ram blowout preventer and method of manufacture |
| 04/03/2008 | CA2664622A1 Reinforcement of irregular pressure vessels |
| 04/03/2008 | CA2664117A1 Method and assembly for producing oil and/or gas through a well traversing stacked oil and/or gas bearing earth layers |
| 04/03/2008 | CA2658708A1 Annular bop packing unit |
| 04/02/2008 | EP1905946A1 Well productivity enhancement method |
| 04/02/2008 | CN201043451Y Hydraulic cylinder supercharging device of blowout preventer |
| 04/02/2008 | CN201043450Y Pendulum direction self-sealing device |
| 04/02/2008 | CN201043446Y Lifting and hanging device of blowout preventer unit |
| 04/02/2008 | CN101153102A Water uptake expansion composition, water uptake expansion material and water uptake expansion packer |
| 04/02/2008 | CN100378293C Drilled hole fixing device |
| 04/02/2008 | CN100378290C Pump plug |
| 04/02/2008 | CN100378189C Self-destructing filter cake |
| 04/01/2008 | US7351681 viscosity of the servicing fluid increases as it passes down the well bore due to its temperature increasing; cement slurry, drilling fluid, gravel packing fluid, fracturing fluid, completion fluid, or a work-over fluid; water-soluble hydrophobically modified polymer comprising a hydrophobic substituent |
| 04/01/2008 | US7350583 One trip string tensioning and hanger securing method |
| 04/01/2008 | US7350580 Subsea pass thru switching system |
| 04/01/2008 | US7350578 Diverter plugs for use in well bores and associated methods of use |
| 04/01/2008 | US7350576 Methods of sealing subterranean formations using rapid setting plugging compositions |
| 04/01/2008 | US7350575 Introducing surfactant, an oleaginous fluid and a cement comprising a metal oxide and a soluble salt into well bore in contact with a subterranean formation , allowing to set |
| 04/01/2008 | US7350574 Methods of retarding the setting of a cement composition using biodegradable monomers |
| 04/01/2008 | US7350573 Servicing a wellbore with wellbore fluids comprising perlite |
| 04/01/2008 | US7350562 Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use |
| 04/01/2008 | CA2308944C Well reference apparatus and method |
| 03/29/2008 | CA2642078A1 Method of heating hydrocarbons |
| 03/27/2008 | WO2008036575A1 Retractable ball seat having a time delay material |
| 03/27/2008 | WO2008036002A1 Device used in the form of a packer or a temporary plug |
| 03/27/2008 | WO2008035091A1 Improved well bore control valve |
| 03/27/2008 | WO2007149622A3 Sulfur barrier for use with in situ processes for treating formations |
| 03/27/2008 | WO1999057417A3 Chemical actuation system for downhole tools and method for detecting failure of an inflatable element |
| 03/27/2008 | US20080073086 Apparatus for controlling slip deployment in a downhole device |
| 03/27/2008 | US20080073075 Pressure Barrier Apparatus |
| 03/27/2008 | US20080073074 Composite cement retainer |
| 03/27/2008 | CA2663969A1 Improved well bore control valve |
| 03/27/2008 | CA2662210A1 Internal breaker for oilfield treatments |
| 03/26/2008 | EP1903180A1 Compressible darts and methods for using these darts in subterranean wells |
| 03/26/2008 | EP1203177B1 Expandable joint connector |
| 03/26/2008 | CN201041029Y Oil well cement weight loss and gas-liquid cross flow simulated test device |
| 03/26/2008 | CN201041021Y Double passage oil-doped type pumping mechanical water-plugging and oil extraction integral pipe column |
| 03/26/2008 | CN201041014Y Detachable type releasing equipment suspension packer |
| 03/26/2008 | CN201041013Y Well mouth coupling device |