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)
11/1996
11/27/1996EP0744004A1 A protective device for an installation mounted on the seabed
11/26/1996US5579283 Method and apparatus for communicating coded messages in a wellbore
11/26/1996US5577737 Method and apparatus for establishing and maintaining a fluid seal around a polishing rod
11/26/1996US5577560 Fluid-actuated wellbore tool system
11/26/1996US5577556 For hanging a production tubing string
11/20/1996EP0743422A2 Downhole packing assembly
11/20/1996EP0742968A1 Apparatus for terminating and interconnecting rigid electrical cable and method
11/20/1996EP0643794B1 Method of creating a wellbore in an underground formation
11/19/1996US5576485 Single fracture method and apparatus for simultaneous measurement of in-situ earthen stress state and material properties
11/19/1996US5575452 For controlling the opening and closing of a ram block
11/19/1996US5575451 Blowout preventer ram for coil tubing
11/16/1996CA2175940A1 Control system with collection chamber
11/14/1996WO1996035858A1 Foam mixture for oil production flooding operations
11/13/1996EP0742344A2 Blowout preventer for coiled tubing
11/13/1996EP0742343A2 Hydraulic tubing head assembly
11/13/1996EP0674744B1 Assembly and process for drilling and completing multiple wells
11/10/1996CA2148968A1 Application of microspheres to in situ separation of water and oil
11/06/1996EP0741230A2 Method of detecting the location of well treating fluid
11/06/1996EP0741229A2 Well packer and well stimulation apparatus
11/06/1996EP0566615B1 Connecting apparatus
11/06/1996CN2239502Y Rotary self-closing well closing appts.
11/06/1996CA2175851A1 Downhole tool release mechanism
11/05/1996US5572021 Methods of detecting the locations of well treating fluids
11/05/1996US5571281 Automatic cement mixing and density simulator and control system and equipment for oil well cementing
11/05/1996CA2056917C Apparatus for regaining control over oil and gas flowing from "blow out" walls
11/04/1996CA2175629A1 Coiled tubing deployed inflatable stimulation tool
10/1996
10/31/1996WO1996034175A2 Cementing plug
10/31/1996WO1996034174A1 Mechanism for anchoring a well tool
10/30/1996EP0740047A2 Device for controlling underwater pressure
10/30/1996CN2238902Y Packer
10/30/1996CN1134499A Bimetallic expanding thermal packer
10/29/1996US5570437 Apparatus for the remote measurement of physical parameters
10/29/1996US5568837 Method of inserting tubing into live wells
10/28/1996CA2155139A1 Borehole ventilation sealcover
10/22/1996US5566772 Telescoping casing joint for landing a casting string in a well bore
10/22/1996US5566763 Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion
10/22/1996US5566762 Thru tubing tool and method
10/22/1996US5566761 Internal drilling riser tieback
10/22/1996US5566758 Method and apparatus for drilling wells in to geothermal formations
10/22/1996US5566757 Method and apparatus for setting sidetrack plugs in open or cased well bores
10/22/1996US5566753 Stripper/packer
10/22/1996CA2148576C Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms
10/17/1996WO1996025582A3 One trip cement and gravel pack system
10/17/1996WO1996024745A3 Computer controlled downhole tools for production well control
10/17/1996DE19524502C1 Pile-boring equipment for building work
10/16/1996EP0469140B1 Device for protecting wells from corrosion or deposits caused by the nature of the fluid produced or located therein
10/16/1996CN2237714Y Heat-production packer for oil well
10/16/1996CN1133389A Artificial well-wall sand-proof technology for steam-injection thermal-recovery well of viscous crude oil
10/15/1996US5564504 Programmed shape inflatable packer device and method
10/15/1996US5564503 Methods and systems for subterranean multilateral well drilling and completion
10/15/1996US5564501 Control system with collection chamber
10/15/1996US5564244 Device for the injection and retention of a treatment product in a masonry structure
10/09/1996EP0736666A2 Method and apparatus for determining the stress state and material properties
10/09/1996EP0735919A1 Solvent soaps and methods employing same
10/09/1996CN1133087A Apparatus for testing shear thickening plugging fluid
10/09/1996CN1132820A Method and apparatus forintermittent production of oil with mechanical interface
10/03/1996WO1996030628A1 Formation isolation and testing apparatus and method
10/02/1996EP0735236A1 Assembly and process for drilling and completing multiple wells
10/02/1996CN2236542Y Heat sensitive separator for well by heating process
10/01/1996US5561516 Casingless down-hole for sealing an ablation volume and obtaining a sample for analysis
10/01/1996US5560436 Single drilling guide base for subsea oil wells
10/01/1996US5560258 Release mechanism for use with a remote tool
10/01/1996CA2145784C Plugging of underground strata to eliminate gas and water coning during oil production
09/1996
09/25/1996EP0733917A2 Measuring probe for hydrogeologie measurements
09/25/1996EP0733775A2 Method and apparatus for setting a sidetrack plug in a well bore
09/25/1996EP0578681B1 Retrievable bridge plug and a running tool therefor
09/24/1996US5558532 Electrical connection
09/19/1996WO1996028633A2 Universal pipe injection apparatus for wells and method
09/18/1996EP0732467A1 Injection-packing for holes in brick-work
09/18/1996CN2235501Y Integral type plane sealing and packing ring
09/17/1996US5556900 Modified asphalts for paving and roofing
09/17/1996US5555945 For testing a zone of interest in subsurface formation intersected by a well
09/17/1996US5555935 Fluid connector for well
09/11/1996EP0731253A2 Combating lost circulation during the drilling of wells
09/11/1996EP0638137B1 Method for excavating tunnels, utilisation of a foaming agent and new composition
09/10/1996US5553671 Piston sub for isolating drilling fluids from hydraulic fluids
09/10/1996US5553670 Phosphate ions
09/10/1996US5553667 Plug holding device
09/03/1996US5551521 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
09/03/1996US5551511 Drilling fluid containment apparatus for use in disconnecting a kelly from a drill string
09/03/1996CA2096765C Acceleration of gelation of water soluble polymers
08/1996
08/28/1996EP0728914A2 Cementing tool for wells
08/28/1996EP0728253A1 Cellulose injection system and method
08/28/1996CN1032672C Connecting apparatus
08/27/1996US5549170 Method of removing material from a subsurface
08/27/1996US5549165 Valve for inflatable packer system
08/27/1996US5549163 Piston sleeve valve for use with oilfield fishing operations
08/27/1996US5549159 Formation testing method and apparatus using multiple radially-segmented fluid probes
08/27/1996US5549156 Shock absorber & Wiper
08/27/1996CA2067303C Whipstock
08/22/1996WO1996025582A2 One trip cement and gravel pack system
08/22/1996DE19604518A1 Injection packer for borehole closure in brickwork, concrete, wood, etc.
08/21/1996EP0727007A1 Pressurized sheave mechanism for high pressure wireline service
08/20/1996US5547027 Low temperature, low rheology synthetic cement
08/15/1996WO1996024748A1 Production wells having permanent downhole formation evaluation sensors
08/15/1996WO1996024745A2 Computer controlled downhole tools for production well control
08/14/1996CN2232976Y Anchor hot washing spacer for oil pipeline
08/13/1996US5544707 Wellhead
08/13/1996US5544706 Retrievable sealing plug coil tubing suspension device
08/13/1996US5544705 Method for injecting fluid into a wellbore
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