| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 01/15/2009 | US20090014177 Method to Cement a Perforated Casing |
| 01/15/2009 | CA2790667A1 Methods and compositions for preventing high density well completion fluid loss |
| 01/15/2009 | CA2692794A1 Methods and compositions for preventing high density well completion fluid loss |
| 01/14/2009 | EP2014868A1 Method and apparatus to complete a well having tubing inserted through a valve |
| 01/14/2009 | EP2013443A1 Apparatus and method for severing a wellbore tubular |
| 01/14/2009 | EP1812681B1 Apparatus and method for use in a well bore |
| 01/14/2009 | EP1756395B1 A method and a device for expanding a body under overpressure |
| 01/14/2009 | CN201180517Y Antiskid rubber plug |
| 01/14/2009 | CN201180516Y Well cementing instrument system |
| 01/14/2009 | CN201180515Y Automatic continuous grouting apparatus for pulling out of hole in oil field well drilling |
| 01/14/2009 | CN201180514Y Multifunctional gripper pipe blowout preventer |
| 01/14/2009 | CN201180513Y Multifunctional shaft mouth blowout apparatus |
| 01/14/2009 | CN201180512Y Anti-theft packing box |
| 01/14/2009 | CN201180511Y Gas injection, oil extraction shaft mouth apparatus |
| 01/14/2009 | CN201180510Y Pumping rod blowout preventer |
| 01/14/2009 | CN201180494Y Sweeping device of well plugging device for gas drilling |
| 01/14/2009 | CN101346530A Controlling pressure and static charge within a wellbore |
| 01/14/2009 | CN101343993A Demixing injection-production column jacket segmenting obstruction pressed operation technique and apparatus |
| 01/14/2009 | CN101343988A Deep layer cement-soil mixing pile grouting water-blocking method for artesian area |
| 01/13/2009 | US7475736 Self centralizing non-rotational slip and cone system for downhole tools |
| 01/13/2009 | US7475731 Sand plunger |
| 01/13/2009 | US7475729 Method for construction and completion of injection wells |
| 01/13/2009 | US7475727 Polyacrylamide gel mixed with chromium acetae crosslinker is injected into the formation immediately following mixing so that the gel solution remains in a liquid state during injection; allowing gel solution to set, thereby reducing fracture permeability in the downhole formation |
| 01/13/2009 | US7475726 Continuous monobore liquid lining system |
| 01/13/2009 | US7475721 Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use |
| 01/13/2009 | CA2485777C Method for controlling the fluid loss properties of viscoelastic surfactant based fluids |
| 01/08/2009 | WO2009006326A2 Gravel-packing carrier fluid with internal breaker |
| 01/08/2009 | US20090008100 Fixed-point packoff element with primary seal test capability |
| 01/08/2009 | US20090008099 Centralization and Running Tool and Method |
| 01/08/2009 | US20090008095 Wellbore Fluid Comprising a Base Fluid and a Particulate Bridging Agent |
| 01/08/2009 | US20090008083 Method and apparatus for wellbore fluid treatment |
| 01/08/2009 | CA2691804A1 Gravel-packing carrier fluid with internal breaker |
| 01/07/2009 | EP2011960A2 An arrangement adapted for a subsea application |
| 01/07/2009 | CN201176862Y Plugging slurry preparation device |
| 01/07/2009 | CN201176861Y Polish-rod sealing device |
| 01/07/2009 | CN201176860Y Packer sealing sleeve |
| 01/07/2009 | CN201176859Y Oil anti-theft device for oil production tree |
| 01/07/2009 | CN101341311A Improved gland box for driving head of oil well pump |
| 01/07/2009 | CN101338658A Hermetic electric submersible pump production completion system capable of proceeding steel wire operation |
| 01/07/2009 | CN101338656A High temperature and high pressure resistant compression packer rubber cartridge |
| 01/07/2009 | CN101338655A Waste and old belt fuel-resistant rubber pack |
| 01/07/2009 | CN101338654A Method for controlling toxic harmful gas overflow from well head for well repairing |
| 01/07/2009 | CN100449113C Method for drilling and completing wells |
| 01/07/2009 | CN100449111C System for sealing a space in a wellbore |
| 01/06/2009 | US7472757 Well packing |
| 01/06/2009 | US7472753 Cementing system for wellbores |
| 01/06/2009 | US7472752 Apparatus and method for forming multiple plugs in a wellbore |
| 01/06/2009 | US7472746 Packer apparatus with annular check valve |
| 01/06/2009 | CA2636949A1 Independent wellhead drilling adapter |
| 01/01/2009 | US20090000792 Retrievable bridge plug |
| 01/01/2009 | US20090000783 Apparatus and method |
| 01/01/2009 | US20090000782 Cementing Valve |
| 12/31/2008 | WO2009001073A2 Downhole apparatus |
| 12/31/2008 | WO2009000396A2 Method and apparatus to cement a perforated casing |
| 12/31/2008 | WO2009000322A1 A sealing device for a tubing arrangement |
| 12/31/2008 | WO2008135167A3 Method and apparatus for measuring a parameter within the well with a plug |
| 12/31/2008 | EP2009230A2 Plug systems and methods for using plugs in subterranean formations |
| 12/31/2008 | EP2009229A2 Plug systems and methods for using plugs in subterranean formations |
| 12/31/2008 | EP2009228A2 Packer with integral mixer |
| 12/31/2008 | EP2009227A1 Method and apparatus to cement a perforated casing |
| 12/31/2008 | EP2009226A2 Apparatus and method for sealing an annulus |
| 12/31/2008 | EP2007968A2 Wellbore method and apparatus for sand and inflow control during well operations |
| 12/31/2008 | EP2007967A2 A system and method for estimating supercharge pressure and initial pressure of a formation |
| 12/31/2008 | EP2007841A1 Drilling fluid and method for reducing lost circulation |
| 12/31/2008 | EP1660795B1 Improved seal |
| 12/31/2008 | CN201173101Y Outer brake type transverse auto-compensation packing kit |
| 12/31/2008 | CN201173098Y Cable penetrating metal seal mandrel hanger positioning apparatus |
| 12/31/2008 | CN101336333A Plug intended to be inserted into a duct on which a fluid flows and associated fluid prospecting well |
| 12/31/2008 | CN101333917A Elastic tube-type thermal production casing head |
| 12/31/2008 | CN101333916A Closed well washing device |
| 12/31/2008 | CN100447372C Shallow drill assembly with separate jet pump |
| 12/30/2008 | US7469931 Connection device |
| 12/30/2008 | US7469750 Expandable seal |
| 12/30/2008 | US7469748 Submersible pumping system |
| 12/30/2008 | US7469746 Downhole sampling tool and method for using same |
| 12/30/2008 | US7469742 Well cap method and apparatus |
| 12/30/2008 | CA2583484C Drilling fluid and method for reducing lost circulation |
| 12/28/2008 | CA2636531A1 Apparatus and method |
| 12/25/2008 | US20080314600 Well Treatment Device, Method and System |
| 12/25/2008 | US20080314596 Apparatus and method for wellbore isolation |
| 12/25/2008 | US20080314591 Single trip well abandonment with dual permanent packers and perforating gun |
| 12/25/2008 | US20080314583 Retrievable Bridge Plug |
| 12/25/2008 | US20080314579 Method and System for Inserting a Fiber Optical Sensing Cable Into an Underwater Well |
| 12/25/2008 | US20080314577 Stress, strain and fatigue measuring of well piping |
| 12/24/2008 | WO2008155565A1 Swellable apparatus and method of forming |
| 12/24/2008 | WO2008155564A1 Apparatus and method with hydrocarbon swellable and water swellable body |
| 12/24/2008 | WO2008155046A1 Apparatus for subsea intervention |
| 12/24/2008 | WO2008134371A3 Use of curable liquid elastomers to produce gels for treating a wellbore |
| 12/24/2008 | WO2008132496A3 Blowout preventer |
| 12/24/2008 | WO2008097396A3 Imputing strength gradient in pressure vessels |
| 12/24/2008 | EP2006486A2 Single trip well abandonment with dual permanent packers and perforating gun |
| 12/24/2008 | EP2004955A1 Improved probe for pressure meter |
| 12/24/2008 | EP2004951A2 Well servicing methods and systems |
| 12/24/2008 | CN201170094Y Antifreeze joint of oil pumping well head pressure gauge |
| 12/24/2008 | CN201170081Y Clamp water packer |
| 12/24/2008 | CN201170080Y Shearing shutter of blowout preventer |
| 12/24/2008 | CN201170079Y Shutter shaft seal flow leakage valve |
| 12/24/2008 | CN201170078Y Ram blowout preventer manual control component |
| 12/24/2008 | CN201170077Y Ram block shaft seal components |
| 12/24/2008 | CN201170076Y Blowout preventer hinge |