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)
03/2014
03/27/2014US20140083700 Compositions and Methods for Plug Cementing
03/27/2014US20140083698 Cement Compositions for Cementing in Confined Locales and Methods for Use Thereof
03/27/2014US20140083697 Wellbore cementing tool
03/27/2014US20140083679 Method for microbial control of injection liquid flow in a hydrocarbon reservoir
03/27/2014US20140083678 Ball seat for a well fracturing apparatus and method of making and using same
03/27/2014US20140083677 Setting and retrieval device
03/27/2014CA2875943A1 Swellable packer having reinforcement plate
03/26/2014EP2711498A1 An active external casing packer (ecp) for frac operations in oil and gas wells
03/26/2014EP2710225A2 Verification of swelling in a well
03/26/2014EP2710219A1 Cement head with hammer union
03/26/2014EP2710218A1 Cutting device safety valve, method and uses for severing a pipe-string-related object in a safety valve for a well
03/26/2014EP2710088A1 Wellbore fluid used with swellable elements
03/26/2014CN203499632U Small casing pipe suspending repair process tubular column of casing damage horizontal well
03/26/2014CN203499631U Well-washing anchor packer
03/26/2014CN203499630U Hydraulic sealing packer
03/26/2014CN203499629U Hydraulic water-injection packer
03/26/2014CN203499628U Well washing type step-by-step deblocking expandable long rubber sleeve packer
03/26/2014CN203499627U Hydraulic oil well packer
03/26/2014CN203499626U Rod-type rotation oil tube blanking plug
03/26/2014CN203499625U Sealing inserting pipe for separated layer water injection to oil-water well
03/26/2014CN203499624U Oil pipeline pressure relief blowout preventer
03/26/2014CN203499623U Sucker rod blowout preventer with hamper bodies automatically centered
03/26/2014CN203499622U Annular preventer used in low temperature
03/26/2014CN203499621U Gate type manual bidirectional linkage locking blowout preventer
03/26/2014CN203499620U Wellhead annular plate for single-shaft twin-well well drilling and well cementing
03/26/2014CN203499619U Novel suspension device of surface sleeve pipe
03/26/2014CN203499618U Gas drive oil production annular test decentralized wellhead device
03/26/2014CN203499617U Dry grinding prevention stuffing box
03/26/2014CN203499616U Simple wellhead
03/26/2014CN203499615U Tubing hanger retaining device
03/26/2014CN203499614U Detachable and combined type well head
03/26/2014CN203499608U Multifunctional sand flushing and well washing valve
03/26/2014CN203499581U Velocity tube device and coiled tubing thereof
03/26/2014CN103688017A Seal around braided cable
03/26/2014CN103688015A Wellbore apparatus and methods for multi-zone well completion, production and injection
03/26/2014CN103670328A Two-stage composite well-cementing rubber plug
03/26/2014CN103670327A Four-stage compression type packer applicable to high-temperature and high-pressure construction conditions
03/26/2014CN103670326A Naked eye packer
03/26/2014CN103670325A Expansion packer rubber barrel
03/26/2014CN103670324A Claw sleeve type hydraulic packer
03/26/2014CN103670323A Well completion device of thief formation
03/26/2014CN103670322A Gate valve tubular blowout preventer
03/26/2014CN103670321A Manual operation flashboard type sucker rod blowout preventer
03/26/2014CN103670320A Comprehensive dust prevention method for large-mining-height working face
03/26/2014CN103670319A Oilfield blowout control operation device and method
03/26/2014CN103657481A Grouting stirring barrel
03/26/2014CN102400655B Butt-joint positioning device of underwater horizontal type oil-production-tree oil-pipe hanger
03/26/2014CN102089493B Offshore unit and method of installing wellhead platform using the offshore unit
03/26/2014CN101915072B Method for extracting coal bed gas in stable mining region by ground well drilling
03/25/2014US8678100 Method of deploying nanoenhanced downhole article
03/25/2014US8678099 Sealing system
03/25/2014US8678093 Insertion of a pack-off into a wellhead
03/25/2014US8678081 Combination anvil and coupler for bridge and fracture plugs
03/25/2014CA2664117C Method and assembly for producing oil and/or gas through a well traversing stacked oil and/or gas bearing earth layers
03/25/2014CA2630337C Controlling the pressure within an annular volume of a wellbore
03/24/2014CA2855054A1 Non-rotating wellbore tool and sealing method therefor
03/24/2014CA2790548A1 Wellbore cementing tool
03/20/2014WO2014043396A2 Tachometer for a rotating control device
03/20/2014WO2014043181A1 Systems and methods for in situ monitoring of cement slurry locations and setting processes thereof
03/20/2014WO2014043101A2 Energizing ring divot back-out lock
03/20/2014WO2014043028A1 Multi-piston hydrostatic setting tool with locking feature and a single lock for multiple pistons
03/20/2014WO2014043022A2 Pin-actuated lock ring arrangement
03/20/2014WO2014042886A2 Annulus seal with stepped energizing ring
03/20/2014WO2014042880A2 Load enhanced locking arrangement
03/20/2014WO2014042874A1 Systems and methods for detecting microannulus formation and remediation
03/20/2014WO2014042867A1 Systems, methods, and apparatuses for in situ monitoring of cement fluid compositions and setting processes thereof
03/20/2014WO2014042657A1 Well tools with semi-permeable barrier for water-swellable material
03/20/2014WO2014042631A1 Rotating control device having seal responsive to outer diameter changes
03/20/2014WO2014041123A1 Drop device
03/20/2014WO2013115869A3 System for controlling the temperature of subsea equipment
03/20/2014WO2013102131A3 Annular sealing in a rotating control device
03/20/2014WO2013096127A3 Plug and abandonment system
03/20/2014US20140076574 Method and system for installing subsea well trees
03/20/2014US20140076563 Methods for Plug Cementing
03/20/2014US20140076561 Magnesium chloride in alcoholic solvent for sorel cement
03/20/2014US20140076560 Wellbore cementing tool having one way flow
03/20/2014US20140076546 Single Trip Multi-Zone Drill Stem Test System
03/20/2014US20140076544 Method of treating subterranean formation
03/20/2014US20140076539 Plugging device
03/20/2014US20140076538 Inner string cementing tool
03/20/2014US20140076534 Seal configuration for top drive swivel apparatus and method
03/20/2014US20140076532 Extendable conductor stand having multi-stage blowout protection
03/20/2014CA2827532A1 Use of aqueous alkali aluminosilicate for profile modification, water control and stabilization
03/20/2014CA2790432A1 Cementing system and method
03/19/2014EP2708694A1 Drop device
03/19/2014EP2707569A1 Mandrel arrangement and method of operating same
03/19/2014EP2707340A1 Settable compositions containing metakaolin having reduced portland cement content
03/19/2014CN203488169U Pressure testing device of inner blowout prevention tool
03/19/2014CN203488143U Automatic mud grouting float-collar float shoe
03/19/2014CN203488142U Rapid assembly type slip-casting hole-sealing device
03/19/2014CN203488141U Tubing plug
03/19/2014CN203488140U K344-type packer for preventing unscrewing of central pipe
03/19/2014CN203488139U Single-gate-disc blowout preventer
03/19/2014CN203488138U Suspension device of coiled tubing wellhead
03/19/2014CN203488137U Mechanical sealing plug capable of fast and simply stopping slurry/water
03/19/2014CN203488136U Anti-theft device of oil well packing box
03/19/2014CN203488110U Layered sand blocking simultaneous-extraction tubular column
03/19/2014CN103649456A Method of reducing deflection through a rod piston in a subsurface safety valve
03/19/2014CN103649454A Intervention blowout preventer and well intervention tool
03/19/2014CN103643918A Method for searching for and preventing mine water seepage of Ordovician limestone mine field
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