Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 33 - Sealing or packing boreholes or wells
Patents for E21B 33 - Sealing or packing boreholes or wells (33,564)
05/2008
05/28/2008CN101187300A Rotary hydraulic machinery double function expansion type tail pipe hanger
05/28/2008CN100390371C Compressed high-temperature packer with gas propelling
05/28/2008CA2581581A1 Direct connecting downhole control system
05/27/2008US7377334 Rotating drilling head drive
05/27/2008US7377327 Variable choke valve
05/27/2008US7377323 Blowout preventer stack landing assist tool
05/27/2008US7377319 Downhole device to measure and record setting motion of packers and method of sealing a wellbore
05/27/2008US7377311 Wellhead valves
05/27/2008CA2528694C Wellbore tool with disintegratable components
05/27/2008CA2509414C Method and apparatus for positioning a sleeve down hole in a hydrocarbon producing well and pipelines
05/22/2008WO2008060893A2 Large bore packer and methods of setting same
05/22/2008WO2008060297A2 Well tool including swellable material and integrated fluid for initiating swelling
05/22/2008WO2008059260A2 Improved tree plug
05/22/2008WO2008024264A3 Fluid saving blowout preventer operator system
05/22/2008US20080115944 Well barrier apparatus and associated methods
05/22/2008US20080115943 Perforating gun assembly to control wellbore fluid dynamics
05/22/2008US20080115939 Radial Expansion of Tubular Members
05/22/2008US20080115938 Method of cementing using polymeric retarder
05/22/2008US20080115937 Servicing a Wellbore with Wellbore Fluids Comprising Perlite
05/22/2008US20080115928 Packoff nipple
05/22/2008US20080115692 Foamed resin compositions and methods of using foamed resin compositions in subterranean applications
05/22/2008CA2667794A1 Improved tree plug
05/22/2008CA2611459A1 Well barrier apparatus and associated methods
05/21/2008EP1697614B1 Device of a test plug
05/21/2008CN201062505Y Hollow suspension sub-releasing axle plug
05/21/2008CN201062504Y Cement head inner-pressure balancing unit
05/21/2008CN201062503Y Barefoot well cement-injection well-completion pipe column
05/21/2008CN201062502Y Mine buckling hole packer
05/21/2008CN201062501Y Barefoot horizontal well packing sand-proof tool
05/21/2008CN201062500Y Swabbing work sealing spraying-proof observe and control apparatus
05/21/2008CN201062499Y Detachable oil extraction mine pore burglarproof box
05/21/2008CN201062498Y Anti-theft clamp
05/21/2008CN101182760A Under balance drilling revolution control device
05/20/2008US7374146 Dual-cylinder blowout preventer operator system
05/20/2008US7373991 Swellable elastomer-based apparatus, oilfield elements comprising same, and methods of using same in oilfield applications
05/20/2008US7373990 Method and apparatus for expanding and separating tubulars in a wellbore
05/20/2008US7373982 Cements for use across formations containing gas hydrates
05/20/2008US7373981 Methods of cementing with lightweight cement compositions
05/20/2008US7373980 Mono-trip cement thru completion
05/20/2008US7373978 Method for drilling and completing wells
05/20/2008US7373973 Packer element retaining system
05/20/2008CA2506556C Shear activated inflation fluid system for inflatable packers
05/20/2008CA2414867C Slip spool and method of using same
05/17/2008CA2601957A1 Method of cementing using polymeric retarder
05/15/2008WO2008058209A2 Offshore universal riser system
05/15/2008WO2008057726A2 System and method for protecting downhole components during deployment and wellbore conditioning
05/15/2008WO2008057690A1 Casing make-up and running tool adapted for fluid and cement control
05/15/2008WO2008057102A1 Controlling pressure and static charge within a wellbore
05/15/2008WO2008056301A1 Method of plugging fractured formation
05/15/2008WO2008056182A1 An underwater apparatus for operating underwater equipment
05/15/2008WO2008056109A1 Improved sealing apparatus
05/15/2008WO2008033536A3 Method of forming subterranean barriers with molten wax
05/15/2008WO2007062329A3 Rotatable flange adapter
05/15/2008US20080110673 Apparatus and methods for drilling a wellbore using casing
05/15/2008US20080110644 Sealing and communicating in wells
05/15/2008US20080110643 Large bore packer and methods of setting same
05/15/2008US20080110637 Top drive casing system
05/15/2008US20080110628 Method of Sealing an Annular Space in a Wellbore
05/15/2008US20080110627 Well Treating Method to Prevent or Cure Lost-Circulation
05/15/2008US20080110626 Well tool including swellable material and integrated fluid for initiating swelling
05/15/2008US20080110625 Stress reduced cement shoe or collar body
05/15/2008US20080110624 Methods for controlling water and particulate production in subterranean wells
05/15/2008US20080110619 Methods of using substantially hydrated cement particulates in subterranean applications
05/15/2008US20080110614 Wellbore filter for submersible motor-driver pump
05/15/2008CA2840725A1 Offshore universal riser system
05/15/2008CA2765069A1 Method of drilling using an offshore riser
05/15/2008CA2668505A1 Method of plugging fractured formation
05/15/2008CA2667937A1 Improved sealing apparatus
05/15/2008CA2667369A1 Casing make-up and running tool adapted for fluid and cement control
05/15/2008CA2634213A1 Controlling pressure and static charge within a wellbore
05/15/2008CA2610203A1 Stress reduced cement shoe or collar body
05/15/2008CA2610136A1 Wireline grease head
05/14/2008EP1920135A2 Multi-purpose downhole tool
05/14/2008EP1766182B1 Blowout preventer
05/14/2008CN201059175Y Polymer flooding eccentric sealing check sealing section
05/14/2008CN201059174Y Combined type bailing well mouth device
05/14/2008CN101178002A Safe oil well mouth protecting device
05/13/2008US7370708 Seal arrangement
05/13/2008US7370698 Method and apparatus for transferring rig weight to tubulars
05/13/2008CA2526102C Lightweight and compact subsea intervention package and method
05/13/2008CA2473511C Apparatus for wellbore communication
05/13/2008CA2118070C New, chemically crosslinked polyvinyl alcohol (pva), process for synthesizing same and its applications as a fluid loss control agent in oil fluids
05/08/2008WO2008054224A1 A method and a device for closing an underground conduit to throughput of particulate material
05/08/2008US20080108523 Acid ammonium salts of an imide of polymaleic anhydride; hydraulic fracturing fluids used in enhanced oil recovery; subterranean formations
05/08/2008US20080105463 Apparatus for, and method of, landing items at a well location
05/08/2008US20080105434 Offshore Universal Riser System
05/08/2008US20080105429 Method Of Cementing Expandable Well Tubing
05/08/2008US20080105428 Placing a slurry ofan alkaline earth metal oxide, a chloride or a phosphate salt, water, glass beads and a foaming agent or into a wellbore; and allowing the composition to set; displays a right angle set; rapidly develops compressive strength
05/08/2008US20080105340 Heat Treatment Method of Inlaid Pressure Vessels
05/07/2008EP1918509A2 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well
05/07/2008EP1917448A2 Modular backup fluid supply system
05/07/2008EP1917444A1 Pressure accumulator to establish sufficient power to handle and operate external equipment, and use thereof
05/07/2008EP1917415A2 Inner guide seal assembly for a ram type bop system
05/07/2008EP1272734B1 New and improved method and apparatus for cleaning wellbore casing
05/07/2008CN201057018Y Substituted block ring type self-sealing rubber plug
05/07/2008CN201057017Y Multilevel packing well completion technique tubular pile
05/07/2008CN201057016Y Hydraulic self-sealing slip packer
05/07/2008CN201057015Y Control device of electric-controlled ground blowout preventer
05/07/2008CN201057014Y Multifunctional casing head
05/07/2008CN201057013Y Wellhead sealing device
1 ... 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 ... 336