| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 06/08/2011 | CN201857932U Layered and integrated water distribution packer of horizontal well |
| 06/08/2011 | CN201857931U Tubing plug |
| 06/08/2011 | CN201857930U Well cleanup packer capable of realizing step-by-step unpacking |
| 06/08/2011 | CN201857929U Novel packer |
| 06/08/2011 | CN201857928U Hydraulic expanding packer |
| 06/08/2011 | CN201857927U Dual-unsealing packer |
| 06/08/2011 | CN201857926U Sealing inserting tube for hydraulic release grip for oil and gas fields |
| 06/08/2011 | CN201857925U Packing device for thermal recovery |
| 06/08/2011 | CN201857924U Slip clamping type blowout preventer for sucker rod |
| 06/08/2011 | CN201857923U Centralized casing head guider |
| 06/08/2011 | CN201857922U Simple wellhead working platform |
| 06/08/2011 | CN201857921U Dual-sliding-cover anti-theft wellhead cap of bailing well |
| 06/08/2011 | CN201857920U Lubricating device for polish rod of beam-pumping unit |
| 06/08/2011 | CN201857919U Oil stealing prevention device of sampling valve of well mouth |
| 06/08/2011 | CN201857918U Oil-filled wellhead sealing and anti-deviating prevention device |
| 06/08/2011 | CN201857917U Anti-theft device of oil-gas well |
| 06/08/2011 | CN1806088B Submarine workover assembly and manufacture method thereof |
| 06/08/2011 | CN102089494A Sealing arrangement and sealing method |
| 06/08/2011 | CN102089493A Offshore unit and method of installing wellhead platform using the offshore unit |
| 06/08/2011 | CN102086759A Oil well polished rod sealer |
| 06/07/2011 | US7954550 Tubing pressure insensitive control system |
| 06/07/2011 | US7954549 Methods of using colloidal silica based gels |
| 06/07/2011 | CA2585321C Multipart frac head with replaceable components |
| 06/07/2011 | CA2506321C Well treating process and system |
| 06/03/2011 | WO2011066044A2 Breech lock mechanisms for blowout preventer and method |
| 06/03/2011 | WO2011034695A3 Fracturing and gravel packing tool with multi movement wash pipe valve |
| 06/03/2011 | WO2011028559A3 Fracturing and gravel packing tool with upper annulus isolation in a reverse position without closing a wash pipe valve |
| 06/03/2011 | WO2011028375A3 Fiber optic inner string position sensor system |
| 06/03/2011 | WO2011025752A3 Selective placement of conformance treatments in multi-zone well completions |
| 06/03/2011 | CA2781268A1 Breech lock mechanisms for blowout preventer and method |
| 06/02/2011 | US20110130505 Gypsum wallboard |
| 06/02/2011 | US20110127727 Sealing arrangement and sealing method |
| 06/02/2011 | US20110127047 Method and apparatus for wellbore fluid treatment |
| 06/02/2011 | US20110127045 Method of Sealing Annular Space Between Inner and Outer Upright Tubes |
| 06/02/2011 | US20110127042 Apparatus and method for treating a subterranean formation using diversion |
| 06/02/2011 | US20110127034 Preparation of setting slurries |
| 06/02/2011 | US20110127033 Single well dual/multiple horizontal fracture stimulation for oil production |
| 06/02/2011 | CA2687643A1 Method of sealing annular space between inner and outer upright tubes |
| 06/01/2011 | EP2326792A2 Pressure relieving transition joint |
| 06/01/2011 | EP2326791A1 Subsea apparatus |
| 06/01/2011 | EP2013443B1 Apparatus and method for severing a wellbore tubular |
| 06/01/2011 | CN201851078U Underground isolation bridge plug |
| 06/01/2011 | CN201851077U Anti-rotation device of well cementing rubber stopper |
| 06/01/2011 | CN201851076U Seat-sealed tieback insertion head |
| 06/01/2011 | CN201851075U Unlimited-position float collar |
| 06/01/2011 | CN201851074U Slips type anti-retreat hydraulic packer |
| 06/01/2011 | CN201851073U Recyclable packer |
| 06/01/2011 | CN201851072U Corrosion-resistant packer for oil well |
| 06/01/2011 | CN201851071U Multistage fracturing hole-sealing tool |
| 06/01/2011 | CN201851070U Packer with expandable base pipe expanding secondarily in case of meeting medium |
| 06/01/2011 | CN201851069U Multi-purpose anchor packer |
| 06/01/2011 | CN201851068U Anti-reversing hydraulic packer |
| 06/01/2011 | CN201851067U Drilling anti-jet orifice device |
| 06/01/2011 | CN201851066U Foldable well-testing blowout-prevention pipe |
| 06/01/2011 | CN201851065U Annular pressure test plug for underwater wellhead |
| 06/01/2011 | CN201851064U Ocean underwater horizontal Christmas tree for oil pipe suspender with double wire rope plugs |
| 06/01/2011 | CN201851063U Submarine horizontal type oil extraction tree in the ocean |
| 06/01/2011 | CN201851062U High-voltage well head cable sealer |
| 06/01/2011 | CN201851061U Blowout control oil extraction well mouth |
| 06/01/2011 | CN201851060U Device for constant pressure, gas release and heat preservation of oil well casing |
| 06/01/2011 | CN201851059U Belting pumping unit well-head packing feeding device |
| 06/01/2011 | CN201851051U Wearing-prevention bush taking-sending tool for underwater wellhead |
| 06/01/2011 | CN201851050U Conductor housing fetching and delivering tool for underwater wellheads |
| 06/01/2011 | CN1950585B Deploying an assembly into a well |
| 06/01/2011 | CN102084084A Choke trim assembly |
| 06/01/2011 | CN102080529A Coal-bed gas thermal cavity completion method |
| 06/01/2011 | CN102080514A Mechanical parameter measuring device of underground compression type packer and using method thereof |
| 06/01/2011 | CN102080513A Fire flooding oil recovery wellhead device |
| 06/01/2011 | CN102080512A Multiposition one-way bypass connection structure for deep-water abandoned well cutting device |
| 06/01/2011 | CN102080511A Deepwater abandoned well cutting device having cementing plug and operation method of cementing plug thereof |
| 06/01/2011 | CN102080510A Submarine mud suction system and method for realizing marine riser-free mud reclamation well drilling |
| 05/31/2011 | US7950469 Modular well tool system |
| 05/31/2011 | US7950468 Wellbore plug |
| 05/31/2011 | US7950466 Wellhead system and connector for wellheads |
| 05/31/2011 | US7950460 Controlling the pressure within an annular volume of a wellbore |
| 05/31/2011 | US7950456 Casing deformation and control for inclusion propagation |
| 05/31/2011 | CA2697139C Apparatus and method for inserting and retrieving a tool string through well surface equipment |
| 05/31/2011 | CA2462234C Contractable and expandable tubular wellbore system |
| 05/31/2011 | CA2437678C Apparatus and method for wellbore isolation |
| 05/26/2011 | WO2011062991A2 Apparatus and methods for multi-layer wellbore construction |
| 05/26/2011 | WO2011062884A1 Functionally graded swellable packers |
| 05/26/2011 | WO2011060897A2 Compositions and methods for mitigation of annular pressure buildup in subterranean wells |
| 05/26/2011 | WO2011060802A1 Control and supply unit |
| 05/26/2011 | WO2011060495A1 Sliding seal for an inflatable packer |
| 05/26/2011 | WO2011060493A1 External casing packer |
| 05/26/2011 | US20110121516 Method for sealing off a water zone in a production well downhole and a sealing arrangement |
| 05/26/2011 | US20110120734 RAM Blowout Preventer Stroke Limiting and Method |
| 05/26/2011 | US20110120733 Functionally graded swellable packers |
| 05/26/2011 | US20110120720 Wellhead Test Tool and Method |
| 05/26/2011 | US20110120716 Compositions and Methods for Mitigation of Annular Pressure Buildup in Subterranean Wells |
| 05/26/2011 | US20110120715 Self adaptive cement systems |
| 05/26/2011 | US20110120714 Method and System for Cementing |
| 05/26/2011 | US20110120705 Simulating Injection Treatments from Multiple Wells |
| 05/26/2011 | US20110120699 Breech Lock Mechanisms for Blowout Preventer and Method |
| 05/26/2011 | US20110120698 Regulator Dampening Device and Method |
| 05/26/2011 | US20110120697 Metal-to-metal seal with wiper element and wellhead system incorporating same |
| 05/26/2011 | US20110120696 Load bearing assembly |
| 05/26/2011 | CA2781001A1 External casing packer |
| 05/26/2011 | CA2779964A1 Open-hole packer for alternate path gravel packing, and method for completing an open-hole wellbore |
| 05/25/2011 | CN201843578U Handwheel fixing clamp for well mouth gate |