| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/10/2007 | CN2856398Y High pressure durable expanding packer |
| 01/10/2007 | CN2856397Y Constant flow regulatable obturator |
| 01/10/2007 | CN2856396Y Combined conic spiral packing |
| 01/10/2007 | CN2856395Y Anti-leakage wellhead device |
| 01/10/2007 | CN2856394Y Antitheft, anti cracking box of wellhead device |
| 01/10/2007 | CN2856393Y Plunger type well shutdown appts. |
| 01/10/2007 | CN2856392Y Folding well compensator |
| 01/10/2007 | CN2856391Y Blowout hookup of oil well |
| 01/10/2007 | CN1891974A Underbalance well completion method and apparatus |
| 01/09/2007 | US7159673 Drilling system with expandable sleeve |
| 01/09/2007 | US7159669 Internal riser rotating control head |
| 01/09/2007 | US7159667 Method of coupling a tubular member to a preexisting structure |
| 01/09/2007 | US7159666 Method to install a cylindrical pipe in a wellbore |
| 01/09/2007 | US7159663 Hybrid wellhead system and method of use |
| 01/09/2007 | US7159662 System for controlling a hydraulic actuator, and methods of using same |
| 01/09/2007 | US7159656 using mixtures of water and hydrophobically modified water-soluble polymer comprising copolymers of dimethylaminoethyl methacrylate and hexadecyldimethylammoniumethyl methacrylate bromide |
| 01/09/2007 | US7159652 Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use |
| 01/09/2007 | CA2465865C Bop handling system |
| 01/09/2007 | CA2360098C Soap stick launcher and method for launching soap sticks |
| 01/09/2007 | CA2260358C Sealed lateral wellbore junction assembled downhole |
| 01/09/2007 | CA2238467C Method and material for cementing bored wells |
| 01/04/2007 | WO2007001887A2 Pipe running tool having a cement path |
| 01/04/2007 | WO2006057996A3 Dual bore well jumper |
| 01/04/2007 | WO2006033906A3 A subsea wellhead arrangement for hydraulically pumping a well |
| 01/04/2007 | US20070000667 Subsea Communication System and Technique |
| 01/04/2007 | US20070000665 Isolation assembly for coiled tubing |
| 01/03/2007 | EP1739278A2 Reverse circulation cementing process |
| 01/03/2007 | EP1556458B1 Self-destructing filter cake |
| 01/03/2007 | EP1264074B1 Intervention device for a subsea well, and method and cable for use with the device |
| 01/03/2007 | CN2854080Y Wellhead anti-blowout completed equipment with fibre-optical TV |
| 01/03/2007 | CN2854073Y Three-D gas injection wellhead compensator |
| 01/03/2007 | CN2854063Y Test tube suspension sealing device of thickened oil horinontal well |
| 01/03/2007 | CN2854062Y Improved sealing structure of three-way pipe cecum for wellhead of heat producing well |
| 01/03/2007 | CN2854061Y Anti-theft device for wellhead packing box |
| 01/03/2007 | CN2854059Y Semi-automatic packing setting device for oil well |
| 01/03/2007 | CN1888374A High-temperature and High-Salt resisting gel water packing-off method |
| 01/03/2007 | CN1293282C In-situ casting of well equipment |
| 01/03/2007 | CN1293281C Wellbore system with annular seal member |
| 01/02/2007 | US7156578 Aquifer recharge valve and method |
| 01/02/2007 | US7156183 Electric hydraulic power unit and method of using same |
| 01/02/2007 | US7156179 Expandable tubulars |
| 01/02/2007 | US7156174 Contained micro-particles for use in well bore operations |
| 01/02/2007 | US7156173 Cement compositions useful in oil and gas wells |
| 01/02/2007 | US7156172 Method for accelerating oil well construction and production processes and heating device therefor |
| 01/02/2007 | US7156169 Electrically operated actuation tool for subsea completion system components |
| 01/02/2007 | CA2480267C Compositions for restoring lost circulation |
| 01/02/2007 | CA2368899C Inflatable packer |
| 12/28/2006 | WO2006121340B1 Packer-anchoring device |
| 12/28/2006 | WO2006119129A3 High pressure expandable packer |
| 12/28/2006 | WO2006057995A3 Well production and multi-purpose intervention access hub |
| 12/28/2006 | WO2005078235A9 Suppressing fluid communication to or from a wellbore |
| 12/28/2006 | WO2005038188A3 Inline compensator for a floating drilling rig |
| 12/28/2006 | US20060290066 Reinforcement ring |
| 12/28/2006 | US20060289173 Packer |
| 12/28/2006 | US20060289164 Treating drilling fluids for oil wells in clay and/or shale with an ion exchanging mixture of amine salts and cationic polymers, such as polydiallyldimethylammoniium chloride and quaternized hexamethylenediamine; antiswelling agents; minimize fines migration; pore penetration; broad pH effective |
| 12/28/2006 | US20060289163 Oil-well cement slurry |
| 12/28/2006 | US20060289162 Methods of retarding the setting of a cement composition using biodegradable monomers |
| 12/28/2006 | US20060289161 Method and apparatus for ECP element inflation utilizing solid laden fluid mixture |
| 12/28/2006 | US20060289158 Introducing a water-soluble polymer having carbonyl groups, an organic crosslinking agent with an amine group capable of crosslinking the carbonyl groups, and a water-soluble carbonate retarder into a subterranean formation, crosslinking to form a gel |
| 12/28/2006 | US20060289154 Top drive swivel apparatus and method |
| 12/27/2006 | CN2851566Y Thermal-recovery sand-proof filling tool |
| 12/27/2006 | CN2851549Y 可控式注射仪 Controllable injection analyzer |
| 12/27/2006 | CN2851548Y Slip type packer |
| 12/27/2006 | CN2851547Y High-pressure well packer |
| 12/27/2006 | CN2851546Y Leak proof packer |
| 12/27/2006 | CN2851545Y Fixing hoop for hydraulic looped pipeline of downhole blowout preventer |
| 12/27/2006 | CN2851544Y Metal sealing structure by using expansion pipe technology |
| 12/27/2006 | CN2851543Y Blowout prevention cap for sleeve grouting in drilling |
| 12/27/2006 | CN2851542Y Drilling anti-blowout device in downhole water exploring and water-draining |
| 12/27/2006 | CN2851541Y Device for mounting belt to packing box |
| 12/27/2006 | CN2851540Y Drilling and extraction four-way connector for use in underbalance drilling |
| 12/27/2006 | CN2851539Y Improved polished rod deflect-correcting sealing structure for pumping well head |
| 12/27/2006 | CN2851538Y Multifunctional polished rod sealing device for well head of pumping well |
| 12/27/2006 | CN2851533Y Blowout-prevention tubing anchor |
| 12/27/2006 | CN2851531Y Well-cleaning protection device for oil well |
| 12/27/2006 | CN1884790A Grouting sealing method and apparatus for borehole and conductor pipe for water prospection of mine |
| 12/27/2006 | CN1884789A Self-fishing type release packer |
| 12/27/2006 | CN1884346A Preparation method of fiber composite gelatin for plugging oil coat macropore |
| 12/26/2006 | US7154411 Reservoir management system and method |
| 12/26/2006 | US7152689 System and method to seal by bringing the wall of a wellbore into sealing contact with a tubing |
| 12/26/2006 | US7152687 Expandable tubular with port valve |
| 12/26/2006 | US7152684 Tubular hanger and method of lining a drilled bore |
| 12/26/2006 | US7152680 Slickline power control interface |
| 12/26/2006 | US7152676 Techniques and systems associated with perforation and the installation of downhole tools |
| 12/26/2006 | US7152673 Contractable and expandable tubular wellbore system |
| 12/26/2006 | US7152657 In-situ casting of well equipment |
| 12/21/2006 | US20060283607 Bore isolation |
| 12/21/2006 | US20060283602 Mounts for blowout preventer bonnets |
| 12/21/2006 | US20060283600 Electric-hydraulic power unit |
| 12/21/2006 | US20060283595 Methods of improving the shelf life of a cement composition comprising a coated gas-generating material |
| 12/21/2006 | US20060283594 Method and apparatus for transferring rig weight to tubulars |
| 12/21/2006 | US20060283593 Double swivel apparatus and method |
| 12/21/2006 | US20060283592 Method useful for controlling fluid loss in subterranean formations |
| 12/20/2006 | CN2849167Y Under well hydraulic tool drillstem pressure testing device |
| 12/20/2006 | CN2849146Y Compounding gun device of new type blocking agent |
| 12/20/2006 | CN2849145Y Interpolation well cementation C type disc |
| 12/20/2006 | CN2849144Y Cement admixture wet mixing liquid supply device |
| 12/20/2006 | CN2849143Y Steam pushing type packer |
| 12/20/2006 | CN2849142Y High temperature high pressure resistant polish rod sealing device |
| 12/20/2006 | CN2849141Y Inner layer nitriding anticorrusion oil proof paraffin removal blowout prevention device |