| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 05/22/2013 | CN103113871A Selecting and blocking ball for performing profile control of water injection well in medium-high temperature oilfield and preparation method and application thereof |
| 05/22/2013 | CN103113864A Temporary blocking agent, composite blockage removal agent and combined blockage removal method using temporary blocking agent and composite blockage removal agent |
| 05/22/2013 | CN102453471B Fresh water-based micro bubble drilling fluid for drilling coal bed gas |
| 05/22/2013 | CN102061903B Ash pouring cylinder with function of pouring at fixed depth |
| 05/22/2013 | CN101709632B Rotary variable-diameter expansion device |
| 05/21/2013 | US8444346 Method of installing geothermal heat pump system and device for installation |
| 05/21/2013 | US8444344 Temporary containment of oil wells to prevent environmental damage |
| 05/21/2013 | US8444109 Blowout preventer translating shaft locking system |
| 05/21/2013 | US8443907 Apparatus and method for sealing portions of a wellbore |
| 05/21/2013 | US8443890 Methods of stimulating liquid-sensitive subterranean formations |
| 05/21/2013 | US8443885 Consolidating agent emulsions and associated methods |
| 05/21/2013 | US8443880 Blowout preventer with shearing blades |
| 05/21/2013 | US8443879 Blowout preventer with shearing blades |
| 05/21/2013 | US8443878 Dual stripper assembly for slick cable |
| 05/21/2013 | CA2716533C Gripping element for gripping a tubular in the construction and maintenance of oil and gas wells |
| 05/21/2013 | CA2549484C Well cap method and apparatus |
| 05/18/2013 | CA2795883A1 Method and composition for cementing a casing in a wellbore |
| 05/16/2013 | WO2013070668A1 Blowout preventer shut-in assembly of last resort |
| 05/16/2013 | WO2013070193A1 Preemptive setpoint pressure offset for flow diversion in drilling operations |
| 05/16/2013 | WO2013070084A1 Method and device for riserless drilling fluid recovery |
| 05/16/2013 | WO2013070082A1 Use of swellable elastomeric polymer materials |
| 05/16/2013 | WO2013068739A2 Improved monitoring of subsea installations |
| 05/16/2013 | WO2012174571A3 Subterranean tool with sealed electronic passage across multiple sections |
| 05/16/2013 | WO2012106130A3 Blowout preventer translating shaft locking system |
| 05/16/2013 | WO2012102775A3 Monitoring the health of a blowout preventer |
| 05/16/2013 | WO2012083047A3 Multi-zone fracturing completion |
| 05/16/2013 | WO2012071231A3 Modular hydraulic packer-and-port system |
| 05/16/2013 | WO2012051584A3 Method and apparatus for isolating and treating discrete zones within a wellbore |
| 05/16/2013 | WO2012051148A3 Marine subsea assemblies |
| 05/16/2013 | US20130119283 Blowout preventer with shearing blades and method |
| 05/16/2013 | US20130118762 Wireline supported bi-directional shifting tool with pumpdown feature |
| 05/16/2013 | US20130118756 Method and device for emergency killing of an underwater oil/gas well |
| 05/16/2013 | US20130118755 Blowout Preventer Shut-In Assembly of Last Resort |
| 05/16/2013 | US20130118752 Managed pressure cementing |
| 05/16/2013 | US20130118751 Formation fracturing |
| 05/16/2013 | US20130118749 Rotating Control System and Method for Providing a Differential Pressure |
| 05/16/2013 | US20130118744 Self-Degrading High Temperature Stable Gel for Downhole Applications |
| 05/16/2013 | US20130118743 Nonionic hydrophobically substituted cellulose ethers |
| 05/16/2013 | US20130118742 Engineered Fibers for Well Treatments |
| 05/16/2013 | CA2876482A1 Managed pressure cementing |
| 05/16/2013 | CA2854755A1 Method and device for riserless drilling fluid recovery |
| 05/16/2013 | CA2854076A1 Preemptive setpoint pressure offset for flow diversion in drilling operations |
| 05/16/2013 | CA2853938A1 Apparatus and method of forming a plug in a wellbore |
| 05/16/2013 | CA2851504A1 Engineered methods and materials for wellbore strengthening in subterranean operations |
| 05/16/2013 | CA2795818A1 Managed pressure cementing |
| 05/15/2013 | EP2592218A1 Valve assembly for a hydrocarbon wellbore, method of retro-fitting a valve assembly and sub-surface use of such valve assembly |
| 05/15/2013 | EP2592129A1 Swellable material using soy spent flakes |
| 05/15/2013 | EP2591207A1 Systems and methods for killing a well |
| 05/15/2013 | EP2591205A2 Method and device for sealing leaks on media-conducting structures |
| 05/15/2013 | EP2591204A2 Packing element system with profiled surface |
| 05/15/2013 | EP2591203A2 Closure for a drill hole |
| 05/15/2013 | EP2591202A1 Circulation sub and method for using same |
| 05/15/2013 | CN202937284U Shattered medium downward casing pipe pore-forming and bolt-grouting substep reinforcing device |
| 05/15/2013 | CN202937225U Novel high-pressure grouting orifice pipe |
| 05/15/2013 | CN202937224U Packer capable of performing well flushing |
| 05/15/2013 | CN202937223U 组合密封压裂封隔器 Combined sealing fracturing packer |
| 05/15/2013 | CN202937222U Well-flushing packer capable of achieving downhole secondary setting |
| 05/15/2013 | CN202937221U Dual-drive tubing plug |
| 05/15/2013 | CN202937220U Automatic deviation regulation type wellhead packing box |
| 05/15/2013 | CN202937219U Lip type conical surface self-seal blowout-preventive well repair device |
| 05/15/2013 | CN202937208U Device for adding packing into mouth of rod-pumped well |
| 05/15/2013 | CN202937207U Special electric submersible pump well head for oil extraction |
| 05/15/2013 | CN103109419A Subsea container electrical through connector |
| 05/15/2013 | CN103109037A Retractable downhole backup assembly for circumferential seal support |
| 05/15/2013 | CN103109036A Ratchet and latch mechanisms |
| 05/15/2013 | CN103109035A Multi-purpose fill and circulate well tool |
| 05/15/2013 | CN103104219A Method using same-layer equivalent in-site extraction well group to extract underground heat energy |
| 05/15/2013 | CN103104216A Air pressure self-balancing check valve |
| 05/15/2013 | CN103104215A Deep drilling compression and sealing device |
| 05/15/2013 | CN103104214A Double-pressurizing-channel packer applied to oil tube sealing and detection |
| 05/15/2013 | CN103104213A High temperature and high pressure test packer |
| 05/15/2013 | CN103104212A Packer applied to water injection craft tubular column |
| 05/15/2013 | CN103104211A Soft skin metal seal and technique of manufacture |
| 05/15/2013 | CN101793128B Blowout preventing tubing anchor |
| 05/15/2013 | CN101705802B Anti-crossflow packing particles for production sections of oil and gas wells |
| 05/14/2013 | US8439327 Shear block and blade interface and method |
| 05/14/2013 | US8439120 Method of sealing annular space between inner and outer upright tubes |
| 05/14/2013 | US8439113 Pump in reverse outliner drilling system |
| 05/14/2013 | CA2795810A1 Seat assembly for isolating fracture zones in a well |
| 05/14/2013 | CA2752135C Method of retreiving a mobilty enhanced formation fluid sample |
| 05/14/2013 | CA2692794C Methods and compositions for preventing high density well completion fluid loss |
| 05/14/2013 | CA2585061C Method and apparatus for well treatment |
| 05/10/2013 | WO2013066825A2 Traversable, segmented wellbore obstructions |
| 05/10/2013 | WO2013066817A2 Subsurface release cementing plug |
| 05/10/2013 | WO2013066715A1 Misalignment connector utilizing interleaved bearings |
| 05/10/2013 | WO2013066655A1 Power generation at a subsea location |
| 05/10/2013 | WO2013066311A1 A contigency release device that uses right-hand torque to allow movement of a collet prop |
| 05/10/2013 | WO2013028384A3 Surface controlled subsurface safety valve |
| 05/10/2013 | WO2013003111A3 Through tubing expandable frac sleeve with removable barrier |
| 05/10/2013 | WO2012052726A3 Drillable slip with buttons and cast iron wickers |
| 05/10/2013 | WO2012051705A9 Tools and methods for use in completion of a wellbore |
| 05/10/2013 | CA2854123A1 Power generation at a subsea location |
| 05/10/2013 | CA2850879A1 Subsurface release cementing plug |
| 05/10/2013 | CA2844709A1 A contigency release device that uses right-hand torque to allow movement of a collet prop |
| 05/10/2013 | CA2794291A1 Swellable material using soy spent flakes |
| 05/09/2013 | US20130115012 Tensioner Cylinder Connections with Multiaxial Degrees of Freedom |
| 05/09/2013 | US20130112436 Completion Method for Stimulation of Multiple Intervals |
| 05/09/2013 | US20130112434 Apparatus and method of forming a plug in a wellbore |
| 05/09/2013 | US20130112420 Blowout preventor actuation tool |
| 05/09/2013 | US20130112414 Engineered Methods and Materials for Wellbore Strengthening in Subterranean Operations |