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)
09/2012
09/05/2012CN202417402U Dual-pipe operation blowout preventer of horizontal well
09/05/2012CN202417401U Integrated two-stage casing head
09/05/2012CN202417400U Quick installing type casing head for thermal production well
09/05/2012CN202417399U Pumping unit well mouth sealing device assembly
09/05/2012CN202417398U Non-leakage hydraulic cylinder type oil well head device
09/05/2012CN202417397U No-killing operation device
09/05/2012CN202417396U Anti-dismantling packing box
09/05/2012CN202417395U Liner type wellhead sealer
09/05/2012CN202417394U Adjustable well head plugging device
09/05/2012CN202417393U Protection cover plate of wellhead loading/unloading source
09/05/2012CN202417392U Anti-theft device for oil well casing oil
09/05/2012CN202417391U Universal eccentric polish rod sealing box
09/05/2012CN202417390U Sucker rod parting protective device
09/05/2012CN202417389U Dropout anti-pollution device for polish rod
09/05/2012CN202417388U Oil removing and blowout preventing tool for sucker rod
09/05/2012CN202417387U Sucker rod spraying device
09/05/2012CN202417386U Intelligent security system for natural gas well
09/05/2012CN202417385U Flexible sealing device for wellhead of underground gas storage well
09/05/2012CN202417384U Single-bore dual-well wellhead devices
09/05/2012CN202417383U Wellhead blowout prevention sealing device
09/05/2012CN202417382U Wellhead operation platform of oil well work
09/05/2012CN202417381U Automatic packing compensator
09/05/2012CN202417380U Autorotation oil producing well head device
09/05/2012CN202417379U Novel polished rod sealing device for wellhead of oil pumping well
09/05/2012CN202417367U Expandable tail pipe hanger
09/05/2012CN202417365U Tail pipe hanger with expandable horn mouth
09/05/2012CN102654043A Automatic set-down type tubing plug
09/05/2012CN102654042A Coiled tubing fracture packer
09/05/2012CN102654023A Main and auxiliary underwater system for deepwater drilling and setting method thereof
09/05/2012CN102071961B Downward gas drainage drill hole and pressure testing drill hole sealing method
09/05/2012CN101737019B Release packer capable of well-flushing
09/05/2012CN101550812B Blowout dealing workover rig
09/05/2012CN101403284B Down-hole tool and controllable segment sealing device for down-hole working barrel seal
09/05/2012CN101270634B Down-hole wall-fixing method
09/05/2012CN101260795B Circulating piping oil extraction device
09/04/2012US8259917 System and method for generating one-way speech signal samples
09/04/2012US8256523 Wellbore plug and method
09/04/2012US8256515 Method and apparatus for dropping a pump down plug or ball
09/04/2012US8256514 Down-hole actuation device storage apparatus and method for launching
09/04/2012US8256508 Downhole safety valve apparatus and method
09/04/2012CA2747140C Wellhead completion assembly capable of versatile arrangements
09/04/2012CA2666163C Subsea rov retrievable tree cap
09/04/2012CA2556563C Power generation system
08/2012
08/30/2012WO2012116284A1 Laser assisted riser disconnect and method of use
08/30/2012WO2012115889A2 Expandable packer with expansion induced axially movable support feature
08/30/2012WO2012115730A2 Expandable packer with mandrel undercuts and sealing boost feature
08/30/2012WO2012114065A1 Apparatus for deployment and retrieval of a payload
08/30/2012WO2012082514A3 Christmas tree installation using coiled tubing injector
08/30/2012WO2012078780A3 Bop stack with a universal intervention interface
08/30/2012WO2012074686A4 Anti-extrusion backup system, packing element system having backup system, and method
08/30/2012US20120217025 Metal expandable element back-up ring for high pressure/high temperature packer
08/30/2012US20120217020 Well containment system
08/30/2012US20120217019 Shear laser module and method of retrofitting and use
08/30/2012US20120217018 Laser assisted blowout preventer and methods of use
08/30/2012US20120217010 Open-Hole Packer For Alternate Path Gravel Packing, and Method For Completing An Open-Hole Wellbore
08/30/2012US20120217004 Expandable Packer with Expansion Induced Axially Movable Support Feature
08/30/2012US20120217003 Open Hole Expandable Packer with Extended Reach Feature
08/30/2012US20120217002 Stuffing box
08/30/2012CA2827979A1 Laser assisted riser disconnect and method of use
08/30/2012CA2827733A1 Subsea conductor anchor
08/29/2012CN202402007U Free falling type drill-free stage collar
08/29/2012CN202402006U External clamping type top-drive casing running device
08/29/2012CN202402005U High pressure water injection packer with long rubber barrel
08/29/2012CN202402004U Negative pressure de-plugging well-flushing anti-backflow multifunctional underground device
08/29/2012CN202402003U Lead sealing sand control packer for 4-inch small holes
08/29/2012CN202402002U Telescopic decompression steam-injection packer
08/29/2012CN202402001U Pumping rod blowout preventer
08/29/2012CN202402000U Three-way structure enabling cable and pipeline to achieve well head penetration
08/29/2012CN202401999U Multifunctional well mouth sealer
08/29/2012CN102650202A Expansion compression type packer
08/29/2012CN101718181B Lifting valve type underground inside-outside integrated blowout preventer
08/29/2012CN101598015B High-precision measuring method for high-pressure well cementation slurry and device thereof
08/29/2012CN101575956B Concentric integral water detecting and plugging pipe column
08/28/2012US8252731 Solid zirconium-based cross-linking agent and use in oil field applications
08/28/2012US8251154 Tubular system with selectively engagable sleeves and method
08/28/2012US8251143 Low permeability cement systems for steam injection application
08/28/2012US8251142 Super shoe swell packer
08/28/2012CA2660219C System and method for thru tubing deepening of gas lift
08/28/2012CA2557797C System for sealing an annular space in a wellbore
08/23/2012WO2012112825A2 Anchoring seal
08/23/2012WO2012112823A2 Stage tool
08/23/2012WO2012112673A2 Method and apparatus for protecting downhole components with inert atmosphere
08/23/2012WO2012112053A1 Well barrier
08/23/2012WO2012078468A3 Extending lines through, and preventing extrusion of, seal elements of packer assemblies
08/23/2012WO2011079169A8 Hydraulic deployment of a well isolation mechanism
08/23/2012US20120211219 Horizontal frac ball injector
08/23/2012CA2827462A1 Anchoring seal
08/23/2012CA2827460A1 Stage tool
08/22/2012EP2489825A1 In-situ solidification of invert emulsion fluids to form gas tight annular barrier
08/22/2012CN202391379U Umbrella-shaped thermosensitive packer for sublevel mining
08/22/2012CN202391378U Automatic ball injecting and receiving device for selective injection of casing deformation wells
08/22/2012CN202391377U Hydraulic top-spray prevention device
08/22/2012CN202391376U Multi-functional slip blowout preventer
08/22/2012CN202391375U Self-pressurizing self-lubricating offset-regulating sealing device for polish rod
08/22/2012CN202391346U Tensioned mooring underwater drilling system
08/22/2012CN102644477A Method for extracting gas of protected layer through wear layer drilling in protective layer airway high-position drilling field
08/22/2012CN102644476A Method for pumping gas of protected layer by layer penetration and hole drilling on high-position drilling fields of protecting layer machinery tunnel
08/22/2012CN102644447A Special rotary blowout preventer for 27/8' drilling tools
08/22/2012CN101644150B After-loading orifice tube and installation method thereof
08/22/2012CN101575969B Method for measuring pressure of coalbed gas
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