Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 33 - Sealing or packing boreholes or wells
Patents for E21B 33 - Sealing or packing boreholes or wells (33,564)
03/2005
03/23/2005CN2687325Y Integrated underground tool string
03/23/2005CN2687321Y Plug-injection type sand trap packer
03/23/2005CN2687320Y Slips stripping packer
03/23/2005CN2687319Y One-way flow flushing packer
03/23/2005CN2687318Y Underground gas-stealing prevention device
03/23/2005CN2687317Y Split packing box
03/23/2005CN2687316Y Improved oil-pumping polish rod well head offset sealing structure
03/23/2005CN2687315Y Well control device for overhaul well
03/23/2005CN2687314Y Dust-free anti-theft well head cap for oil field
03/23/2005CN1599835A Method and device for injecting a fluid into a formation
03/23/2005CN1597837A Water-solubility acidity temporary plugging agent for press cracking
03/22/2005US6869080 Metal-to-metal sealing system
03/22/2005US6868908 Anti-rotation method and apparatus for limiting rotation of cementing plugs
03/22/2005US6868906 Closed-loop conveyance systems for well servicing
03/22/2005CA2288479C Gimbal and seal for the drivehead of a downhole rotary pump
03/22/2005CA2229800C Apparatus and method for performing imaging and downhole operations at work site in wellbores
03/22/2005CA2204329C External casing packer with element end sleeve to collar retainer and method
03/17/2005WO2005024178A1 Device and method of lining a wellbore
03/17/2005WO2005024175A1 Dual function cement additive
03/17/2005WO2004079145A3 Method for drilling and completing wells
03/17/2005WO2004035983A3 Open water running tool and lockdown sleeve assembly
03/17/2005US20050057005 Seal arrangement
03/17/2005US20050056432 Compact mid-grip fastener
03/17/2005US20050056425 Method and apparatus for temporarily maintaining a downhole foam element in a compressed state
03/17/2005US20050056419 Apparatus for wellbore communication
03/17/2005DE102004038704A1 Steuermittel für eine Quelle Control means for a source
03/16/2005EP1399643A4 Rotational mounts for blowout preventer bonnets
03/16/2005EP1386055A4 Quick release blowout preventer bonnet
03/16/2005EP1226336A4 Drilling formation tester, apparatus and methods of testing and monitoring status of tester
03/16/2005CN2685554Y Device for cementing and supporting at external casing
03/16/2005CN2685553Y Self-examining water injection packer
03/16/2005CN2685552Y Static hydraulic washable well packer
03/16/2005CN2685551Y Rotary blowout preventer safety operating platform
03/16/2005CN2685550Y Safety antitheft device for shut-in well
03/16/2005CN2685549Y Sealing cover type glass fiber reinforced plastic well head oil pipe head upper flange
03/16/2005CN2685548Y Wellhead crue oil antitheft lock
03/16/2005CN2685547Y Parallel offset double-sealing rod sealing device
03/16/2005CN2685546Y Chlorine black packing
03/16/2005CN2685545Y Multifunction pumping well head rod packer
03/16/2005CN2685544Y Antiwater entering loop device for oil tank
03/16/2005CN1594827A Water shut off technological process for viscous crude well
03/16/2005CN1594826A Formation contaminant proof air sac packer
03/16/2005CN1594631A Expanding metal material and bulged tube device for petroleum oil well
03/15/2005US6865934 System and method for sensing leakage across a packer
03/15/2005US6865933 Multi-level monitoring well
03/15/2005CA2236011C Method for verifying positive inflation of an inflatable element
03/15/2005CA2188343C Horizontal inflation tool selective mandrel locking device
03/15/2005CA2117943C High-pressure, tubing-to-liner annulus seal for a well
03/10/2005WO2005022012A1 Improved seal
03/10/2005US20050054760 Lightweight without losing strength by using mixture of water, calcium sulfate hemihydrate, and a styrene butadiene polymer latex having sodium 2-acrylamido-2-methylpropanesulfonate monomeric units, which has stability against divalent ions
03/10/2005US20050051363 Treatment fluids comprising starch and ceramic particulate bridging agents and methods of using these fluids to provide fluid loss control
03/10/2005US20050051362 Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use
03/10/2005US20050051343 Apparatus for facilitating the connection of tubulars using a top drive
03/10/2005US20050051341 Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device
03/10/2005US20050051339 Riser control device
03/10/2005US20050051337 Collet load shoulder
03/10/2005US20050051336 Subsea tubing hanger lockdown device
03/10/2005US20050051333 Wiper plug with packer
03/10/2005US20050051331 Reducing number and prevent migration of particles; preflushing with aqueous solution containing surfactant; noncatalytic reaction
03/10/2005CA2797648A1 Improved seal
03/10/2005CA2537153A1 Improved seal
03/09/2005EP1082515B1 Offshore drilling system
03/09/2005CN2683836Y Hydraulic twin-tub anchoring packer
03/09/2005CN2683835Y Rolling type well killing device
03/09/2005CN2683834Y Modified oil pumping polished rod well mouth seal structure
03/09/2005CN2683833Y Pressure testing, sampling and theft protection device of oil well production tree
03/08/2005US6864801 Reservoir monitoring through windowed casing joint
03/08/2005CA2210028C Hydrostatic tool with electrically operated setting mechanism
03/03/2005WO2005019596A1 Method and apparatus for adding a tubular to drill string with diverter
03/03/2005WO2004113158A3 Lightweight and compact subsea intervention package and method
03/03/2005WO2004051049A3 Non-rotating cement wiper plugs
03/03/2005WO2004044367A3 Drilling and producing deep water subsea wells
03/03/2005US20050045341 Radial expansion of tubular members
03/03/2005US20050045340 Method of forming a bore
03/03/2005US20050045330 Strengthening near well bore subterranean formations
03/03/2005US20050045324 Radial expansion of tubular members
03/03/2005DE102004035783A1 Bohrlochwerkzeug und Verfahren zum Verringern von Schutt in einer Perforation in einem Bohrloch The downhole tool and method for reducing debris in a perforation in a wellbore
03/03/2005CA2539039A1 Method and apparatus for adding a tubular to drill string with diverter
03/02/2005EP1510651A2 Method and apparatus for expanding a liner patch
03/02/2005EP1510650A2 Downhole surge pressure reduction and filtering apparatus
03/02/2005EP1509675A1 Method for construction and completion of injection wells
03/02/2005EP1264073B1 Downhole surge pressure reduction and filtering apparatus
03/02/2005EP1226332B1 Hydraulically set straddle packers
03/02/2005CN2682194Y Well repairing device
03/02/2005CN1587638A Profile control and sand fixing integrated technology for heat oil production well
03/02/2005CN1587637A Use of modified flyash as profile control agent
03/01/2005US6860320 Bottom member and heat loops
03/01/2005CA2468602A1 A method of forming a bore
02/2005
02/24/2005WO2005017309A1 Apparatus and methods for preventing or limiting rotation of cementing plugs
02/24/2005WO2005017300A2 Continuous monobore liquid lining system
02/24/2005WO2005016581A2 Casing cutter
02/24/2005WO2004111379A3 Removable seal carrier for blowout preventer bonnet assembly
02/24/2005WO2004090067A3 Drilling fluids with improved shale inhibition and methods of use in subterranean formations
02/24/2005WO2004083590A3 Method and apparatus for drilling a borehole with a borehole liner
02/24/2005US20050039928 Radial expansion of tubular members
02/24/2005US20050039923 Well control means
02/24/2005US20050039917 Isolation packer inflated by a fluid filtered from a gravel laden slurry
02/24/2005US20050039916 Expanding well tools
02/24/2005US20050039908 Sealing system for the interspace in the transition region between two well pipes of different diameters, and mounting tool for this
02/24/2005CA2535230A1 Subterranean fluids and methods of using these fluids in subterranean formations
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