| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/11/2013 | DE102011085540B3 Device for closing and opening borehole of well, has expansible anchor that is deformed in active state so that axial length of expansion anchor is shortened and radial diameter is widened |
| 04/11/2013 | CA2850500A1 Seal assemblies in subsea rotating control devices |
| 04/10/2013 | EP2579438A1 Power cell for deepwater application |
| 04/10/2013 | EP2576980A2 Surface detection of failed open-hole packers using tubing with external tracer coatings |
| 04/10/2013 | EP2576973A2 Compact cable suspended pumping system for lubricator deployment |
| 04/10/2013 | EP2576969A1 Enhanced smear effect fracture plugging process for drilling systems |
| 04/10/2013 | EP2576968A1 Method and apparatus for use in well abandonment |
| 04/10/2013 | EP2576967A1 Process for transporting fracture ("frac") fluid additives to oil and gas wells utilizing ion exchange resin |
| 04/10/2013 | EP2576966A1 Improved process for manufacturing swellable downhole packers and associated products |
| 04/10/2013 | EP2576965A2 Well intervention method and apparatus |
| 04/10/2013 | EP2576964A1 Method and system for containing uncontrolled flow of reservoir fluids into the environment |
| 04/10/2013 | EP2576962A2 System and method for severing a tubular |
| 04/10/2013 | EP2576961A2 Tubular severing system and method of using same |
| 04/10/2013 | EP2576960A2 Tubular severing system and method of using same |
| 04/10/2013 | CN202866867U Hole packer for drawing out gas and grouting |
| 04/10/2013 | CN202866747U Drilling liner hanger drill rod rubber plug with anti-dropping mechanism |
| 04/10/2013 | CN202866746U Squeeze film-formation wall protection tool for well drilling |
| 04/10/2013 | CN202866745U Cement plug positioner |
| 04/10/2013 | CN202866744U Flow restricting self-filling float collar for manifold cycles |
| 04/10/2013 | CN202866743U High-temperature-resisting and high-pressure-resisting washable well packer |
| 04/10/2013 | CN202866742U Self-locking well flushing packer |
| 04/10/2013 | CN202866741U Expanding open hole packer with hydraulic control lock |
| 04/10/2013 | CN202866740U Discharge type well flushing packer |
| 04/10/2013 | CN202866739U Oil extraction seal device for oil well |
| 04/10/2013 | CN202866738U Cylindrical hole sealed bag for mine |
| 04/10/2013 | CN202866737U Rotary-piston-type underground water plugging device |
| 04/10/2013 | CN202866736U Slurry blowout-prevention box |
| 04/10/2013 | CN202866735U Well mouth anti-spurting box deviation correcting device of oil well |
| 04/10/2013 | CN202866734U Oil field sucker rod sealing device |
| 04/10/2013 | CN202866733U Novel well repair seal device for oil field |
| 04/10/2013 | CN202866732U Hole opening plugging device and gas extraction system |
| 04/10/2013 | CN202866731U Anti-hanging device for construction operation well mouth |
| 04/10/2013 | CN202866730U Discontinued well anti-theft shut-in well device |
| 04/10/2013 | CN202866729U Anti-theft well head device |
| 04/10/2013 | CN202866728U Temporary plugging device of oil casing annulus |
| 04/10/2013 | CN202866727U Fall prevention device for wellhead sealer |
| 04/10/2013 | CN202866726U Automatic correction anticorrosive double-layer polished rod sealing device |
| 04/10/2013 | CN202866725U Special unequal-diameter sealing device for intelligent intermittent bailing-type oil pumping unit |
| 04/10/2013 | CN103038442A Subsea wellhead with a segmented fatigue reduction sleeve |
| 04/10/2013 | CN103038441A Subsea wellhead with controlled access to the annulus |
| 04/10/2013 | CN103038440A Insertion of a packoff into a wellhead |
| 04/10/2013 | CN103032051A Casing float collar for well cementation |
| 04/10/2013 | CN103032050A Unstable formation treatment technique for rock salt well construction |
| 04/10/2013 | CN103032049A Movable blowout preventer platform for ocean platform |
| 04/10/2013 | CN103032048A Remote communication with subsea running tools via blowout preventer |
| 04/10/2013 | CN103032047A A bi-directional pressure energised axial seal and a swivel connection application |
| 04/10/2013 | CN103032046A Novel self-installing four-cylindrical-foundation two-upright wellhead platform |
| 04/10/2013 | CN103032045A Plugging method and plugging device for high sub-level open draw shaft mouth |
| 04/10/2013 | CN103032044A Multipurpose well shutting machine |
| 04/10/2013 | CN103032043A Special hydraulic orifice sealer by orifice sealed grouting method |
| 04/10/2013 | CN103032042A Damage tolerant casing hanger seal |
| 04/10/2013 | CN103032040A Continuous cycle short circuit suitable for air drilling |
| 04/10/2013 | CN102071902B Drilling-free cement filling device for horizontal well |
| 04/10/2013 | CN102029649B Automatic control method of well-cementing cement mixing operation |
| 04/10/2013 | CN101871334B Blocking technological method of drillable oil layer |
| 04/09/2013 | US8413730 Wellhead assembly with telescoping casing hanger |
| 04/09/2013 | US8413719 Relative permeability modification |
| 04/09/2013 | US8413717 System and method for enhancing packer operation and longevity |
| 04/09/2013 | US8413716 Position data based method, interface and device for blowout preventer |
| 04/09/2013 | CA2743362C Fluorinated elastomeric blowout preventer packers and method |
| 04/06/2013 | CA2791468A1 Enhanced oilfield swellable elastomers and methods for making and using same |
| 04/04/2013 | WO2013048810A1 Multizone treatment system |
| 04/04/2013 | WO2013048666A1 Enhancing swelling rate for subterranean packers and screens |
| 04/04/2013 | WO2013045553A2 A downhole injection tool |
| 04/04/2013 | WO2013013147A3 High pressure tie back receptacle and seal assembly |
| 04/04/2013 | WO2012166930A3 Method of reducing deflection through a rod piston in a subsurface safety valve |
| 04/04/2013 | WO2012140201A3 Bridge plug tool |
| 04/04/2013 | WO2012128644A3 Apparatus and method for positioning of a fluidized plugging material in an oil well or gas well |
| 04/04/2013 | WO2012051149A3 Marine subsea free-standing riser systems and methods |
| 04/04/2013 | US20130081827 Multizone treatment system |
| 04/04/2013 | US20130081801 Methods for Improving Coatings on Downhole Tools |
| 04/04/2013 | CA2848821A1 A downhole injection tool |
| 04/04/2013 | CA2848420A1 Apparatus and method for galvanically removing from or depositing onto a device a metallic material downhole |
| 04/03/2013 | EP2574720A1 A downhole injection tool |
| 04/03/2013 | CN202851054U Mining hole-sealing capsule |
| 04/03/2013 | CN202851052U A delay self-expanding capsule and paste body combination hole sealing device for drilled holes of gas extraction |
| 04/03/2013 | CN202850942U Well cementing device capable of vibrating in multi-direction |
| 04/03/2013 | CN202850941U Drilling-free-type grading cementing device |
| 04/03/2013 | CN202850940U Float collar of controllable check valve |
| 04/03/2013 | CN202850939U Novel classification cement injector of sealing device |
| 04/03/2013 | CN202850938U Upper seal inner string cementing device |
| 04/03/2013 | CN202850937U Setting tool assembly capable of integrating well cementation and well completion |
| 04/03/2013 | CN202850936U Cementing well cementation sliding sleeve device |
| 04/03/2013 | CN202850935U Y521 packer |
| 04/03/2013 | CN202850934U Water injection separated layer packer |
| 04/03/2013 | CN202850933U Oil-water self expansion packer |
| 04/03/2013 | CN202850932U Motive seal device for underground exploitation and injection in same well |
| 04/03/2013 | CN202850931U Blowout prevention device of oil well mouth |
| 04/03/2013 | CN202850930U Overflow automatic control device for drilling |
| 04/03/2013 | CN202850929U Swabbing blowout prevention box |
| 04/03/2013 | CN202850928U Mud spray-proof box |
| 04/03/2013 | CN202850927U Buckle screwer for casing head |
| 04/03/2013 | CN202850926U Anti-flushing type underwater wellhead sedimentation prevention device for deepwater well drilling |
| 04/03/2013 | CN202850925U Pumping well polish rod sealing element installer |
| 04/03/2013 | CN202850924U Bailing well wellhead sealing device |
| 04/03/2013 | CN202850923U Oil well sealing device |
| 04/03/2013 | CN202850922U Pumping unit well mouth wear-resisting spiral packing |
| 04/03/2013 | CN202850921U Anti-oil-spill belt packing box |
| 04/03/2013 | CN202850920U Floating type well head splash-proof protecting device for mechanized well workover operation |
| 04/03/2013 | CN202850913U Turbo-type down-hole vibration cementing device |