| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 01/13/2010 | EP2143874A1 Sealing arrangement and sealing method |
| 01/13/2010 | EP2142615A1 Fluid pressure transmission pill |
| 01/13/2010 | EP1963617B1 Slotted slip element for expandable packer |
| 01/13/2010 | EP1812680B1 Improved valve |
| 01/13/2010 | CN201381851Y Water injection well blockage leakage testing device |
| 01/13/2010 | CN201381836Y Oilfield multiwell short-distance cascading oil collecting device |
| 01/13/2010 | CN201381825Y Removable multifunctional bridge plug |
| 01/13/2010 | CN201381824Y Sealed circulation device for stage-cementing device invalidation |
| 01/13/2010 | CN201381823Y Rotation-prevention mechanism for packer |
| 01/13/2010 | CN201381822Y Casing head |
| 01/13/2010 | CN201381821Y Automatic hydraulic lifting device for wellheads |
| 01/13/2010 | CN201381820Y Polished rod cleaner for oil pumping unit |
| 01/13/2010 | CN201381819Y Wellhead packing box |
| 01/13/2010 | CN201381818Y Well cleaning oil gas anti-theft system |
| 01/12/2010 | US7644764 Polyelectrolyte complexes as delayed gelling agents for oil and gas applications |
| 01/12/2010 | US7644757 Fixed-point packoff element with primary seal test capability |
| 01/12/2010 | CA2582751C Secondary lock for a downhole tool |
| 01/12/2010 | CA2490523C Well cementing compositions and methods |
| 01/12/2010 | CA2407983C Radial expansion of tubular members |
| 01/12/2010 | CA2335266C Solids-free viscous fluids |
| 01/07/2010 | WO2010003116A1 Variable buoyancy subsea running tool |
| 01/07/2010 | WO2010002686A1 Metal-to-metal seal for smooth bore |
| 01/07/2010 | WO2010001002A1 Novel method for the treatment of rock formations and novel polyampholytes |
| 01/07/2010 | WO2009114704A3 Subsea tool changer |
| 01/07/2010 | WO2009074785A3 Sealing apparatus |
| 01/07/2010 | WO2009074780A3 Improved packing element |
| 01/07/2010 | US20100000730 Acoustically Measuring Annulus Probe Depth |
| 01/07/2010 | CA2637330A1 Snubbing jack |
| 01/06/2010 | EP2140098A1 Running tool for expandable liner hanger and associated methods |
| 01/06/2010 | EP2139945A1 Swellable compositions and methods and devices for controlling them |
| 01/06/2010 | CN201377312Y Layered water injection tool |
| 01/06/2010 | CN201377303Y Multifunctional internal blowout preventer |
| 01/06/2010 | CN201377302Y Oil well casing collection device |
| 01/06/2010 | CN201377301Y No-killing balanced feeding type switching valve device |
| 01/06/2010 | CN201377300Y Easily assembled self-sealing blowout preventor |
| 01/06/2010 | CN201377299Y Pressure-relief type casing oil-stealing preventing screwed plug, dismantling device and pressure-relief ejector rod thereof |
| 01/05/2010 | US7642926 Control system of an actuator for the actuation of submarine devices |
| 01/05/2010 | US7642223 encapsulation; for servicing well bores |
| 01/05/2010 | US7640985 Placing where desired in the well bore a self-degrading cement composition and a source of acid, base or water; setting, hardening, and degrading to allow fluidcommunication where the plug is partially restored; removing plug with a drill string and continue drilling enhanced oil recovery |
| 01/05/2010 | US7640984 Method for drilling and casing a wellbore with a pump down cement float |
| 01/05/2010 | US7640983 Method to cement a perforated casing |
| 01/05/2010 | US7640982 Method of injection plane initiation in a well |
| 01/05/2010 | US7640974 Spool apparatus to connect to underground well pipe |
| 01/05/2010 | US7640965 Creating a well abandonment plug |
| 01/05/2010 | CA2451263C Methods and apparatus for applying torque and rotation to connections |
| 01/05/2010 | CA2259638C Apparatus and method for installing a pipe in a wellbore |
| 12/31/2009 | US20090322030 Metal-to-Metal Seal for Smooth Bore |
| 12/31/2009 | US20090322029 Metal-to-Metal Seal for Smooth Bore |
| 12/31/2009 | US20090321088 Shear activated safety valve system |
| 12/31/2009 | US20090321087 Expandable plug |
| 12/31/2009 | US20090321074 Mechanically modified filter cake |
| 12/31/2009 | US20090321068 Plug member and mounting and dismounting device therefor |
| 12/31/2009 | US20090321067 Releasing slips for oil well tool |
| 12/31/2009 | US20090321066 Packer Insert for Sealing on Multiple Items Used in a Wellbore |
| 12/31/2009 | US20090321065 Resettable antiextrusion backup system and method |
| 12/30/2009 | WO2009158340A2 Improved well drilling method for prevention of lost circulation of drilling muds |
| 12/30/2009 | WO2009157772A1 Pressure control head system |
| 12/30/2009 | WO2009156168A1 Apparatus for improving well safety and recovery and installation process thereof |
| 12/30/2009 | WO2009137840A9 Oil well plug and abandonment method |
| 12/30/2009 | WO2009120759A3 Wellbore anchor and isolation system |
| 12/30/2009 | WO2009108742A3 Apparatus and methods for setting one or more packers in a well bore |
| 12/30/2009 | WO2009094245A3 Connection methods and systems |
| 12/30/2009 | EP2137280A1 Method for treating a fractured formation |
| 12/30/2009 | CN201372768Y Gas well sliding sleeve throttling one-way valve |
| 12/30/2009 | CN201372766Y Fullering cup unsealing tool |
| 12/30/2009 | CN201372765Y Testing device of rubber cylinder of packer |
| 12/30/2009 | CN201372764Y Underground blowout preventer clamp |
| 12/30/2009 | CN201372763Y Anti-ejecting device of wellhead ram |
| 12/30/2009 | CN201372762Y Anti-theft screwed plug for wellhead |
| 12/30/2009 | CN201372761Y Device for mining wellhead of salt deposit by drilling solution mining method |
| 12/30/2009 | CN201372760Y Wellhead blowout preventer for polished rod dropout |
| 12/30/2009 | CN201372751Y Wellhead packing loader for rod-pumped well |
| 12/30/2009 | CN100575659C Underbalance well completion method |
| 12/30/2009 | CN100575658C Blowout-prevention blocking device for oil pipe used in oil and gas well |
| 12/30/2009 | CN100575657C Anti-theft valve of anti-theft oil-production tree |
| 12/30/2009 | CA2728304A1 Apparatus for improving well safety and recovery and installation process thereof |
| 12/29/2009 | USRE41059 Expandable wellbore junction |
| 12/29/2009 | US7637508 High temperature high pressure seal stack having run-dry capability |
| 12/29/2009 | US7637474 Fluid saving blowout preventer operator system |
| 12/29/2009 | US7637325 Subsea trees and caps for them |
| 12/29/2009 | US7637319 Biodegradable; acid-based cements |
| 12/29/2009 | CA2506428C Selective stimulation with selective water reduction |
| 12/24/2009 | US20090314544 Well Drilling and Production Using a Surface Blowout Preventer |
| 12/24/2009 | US20090314499 Downhole Shut Off Assembly for Artificially Lifted Wells |
| 12/24/2009 | US20090314494 Wellhead Housing Bootstrap Device |
| 12/23/2009 | WO2009154913A2 Thermally expansive fluid actuator devices for downhole tools and methods of actuating downhole tools |
| 12/23/2009 | WO2009154901A2 Mineral extraction system having multi-barrier lock screw |
| 12/23/2009 | WO2009154881A1 Frac adapter for wellhead |
| 12/23/2009 | WO2009152918A2 Actively energized dynamic seal system |
| 12/23/2009 | WO2009133438A3 Swellable compositions for borehole applications |
| 12/23/2009 | WO2009129307A3 Multi-section tree completion system |
| 12/23/2009 | WO2009129059A3 Zero-relaxation packer setting lock system |
| 12/23/2009 | WO2009120935A3 Wellhead hanger shoulder |
| 12/23/2009 | WO2009120578A3 Telescoping wiper plug |
| 12/23/2009 | WO2009099946A4 Variable bore packer for a blowout preventer |
| 12/23/2009 | EP2136031A1 Casing strings and methods of using such strings in subterranean cementing operations |
| 12/23/2009 | CN201367882Y Thermal recovery stuffing box capable of adjusting center with low pretightening force |
| 12/23/2009 | CN201367881Y Multi-base quick-installation well head device |
| 12/23/2009 | CN101608538A External packer of expanding sealing sleeve of internal pipe string tool and construction technique |
| 12/23/2009 | CN101608537A Multifunctional oil-extractor polish-rod double-aligning anti-theft mobile packing box |