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 7 - Special methods or apparatus for drilling
Patents for E21B 7 - Special methods or apparatus for drilling (22,064)
10/2003
10/22/2003CN2581680Y Movable engineering drilling machine
10/22/2003CN1451075A Method and apparatus for hydrocarbon subterranean recovery
10/21/2003US6634444 Drill bit for trenchless drilling
10/21/2003US6634436 Mobile land drilling apparatus and method
10/21/2003US6634430 Method for installation of evacuated tubular conduits
10/16/2003US20030192719 Drilling apparatus
10/16/2003US20030192718 Nozzle for jet drilling
10/16/2003US20030192705 Forming a wellbore casing while simultaneously drilling a wellbore
10/15/2003EP1352131A1 Method and apparatus for vibratory kinetic energy generation and application thereof
10/15/2003CN2580087Y Oil field branch well reentry device
10/15/2003CN2580086Y Drilling machine
10/14/2003CA2088924C Controlled fracture method and apparatus for breaking hard compact rock and concrete materials
10/09/2003WO2003083250A1 One trip through tubing window milling apparatus and method
10/09/2003WO2002090707A3 Drilling device comprising a drive body with nozzles
10/09/2003US20030188892 Rotary steerable drilling tool
10/08/2003EP1350003A1 Method of drilling and operating a subsea well
10/08/2003CN2578509Y Jet hole digger
10/08/2003CN2578508Y Controllable liquid inlet valve for rotary guiding drilling tool
10/07/2003US6629571 Downhole motor assembly
10/07/2003CA2226970C Branch boreholes
10/02/2003WO2003080988A2 Drill head and method for controlled horizontal drilling
10/02/2003WO2003080987A1 Method and device for coring and/or directional drilling
10/02/2003US20030183423 Rotary control of rotary steerables using servo-accelerometers
10/02/2003US20030183388 One trip through tubing window milling apparatus and method
10/02/2003DE20311847U1 Drilling machine for drilling screwable struts has drilling drive and drilling axis with drilling support strut on which drilling drive sits with resting axle moving up and down
10/01/2003EP1198654B1 Lockable motor assembly for use in a well bore
10/01/2003EP1075585B1 Device relating to a boring assembly
10/01/2003EP0991845B1 Earth formation surveying device
10/01/2003CN1445432A Subdevice with changable module
09/2003
09/30/2003US6626254 Drilling assembly with a steering device for coiled-tubing operations
09/30/2003US6626253 Oscillating shear valve for mud pulse telemetry
09/30/2003US6626250 Ice auger shroud system
09/30/2003US6626249 Dry geothermal drilling and recovery system
09/30/2003US6626248 Assembly and method for jarring a drilling drive pipe into undersea formation
09/30/2003CA2293427C System for drilling and completing multilateral wells
09/30/2003CA2214695C Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts
09/25/2003WO2003078790A1 Lining and drilling a wellbore with an expandable bit
09/24/2003EP1347150A1 Apparatus with exchangeable modules
09/24/2003CN2575301Y High polymer chock awning top beam and plate shoe
09/24/2003CN2575284Y Oil casing threaded joints
09/24/2003CN2575283Y Single-oil cylinder jib lubbing mechanism for rockbolting drilling machine
09/24/2003CN2575282Y Adjustable drilling guide mechanism for engineering drilling machine
09/24/2003CN1443920A Directional drilling machine with continuous propelling wate jet flow
09/24/2003CN1443919A Well-digging method and its equipment
09/23/2003US6622803 Stabilizer for use in a drill string
09/23/2003US6622792 Apparatus and method for improving multilateral well formation and reentry
09/23/2003CA2167795C Articulated directional drilling motor assembly
09/18/2003WO2003076760A2 Steerable soil penetration system
09/18/2003WO2003076759A1 Method and device for directional down-hole drilling
09/18/2003WO2003012248A3 Pipe feed
09/18/2003US20030173115 Sub apparatus with exchangeable modules
09/18/2003US20030173113 Automated bore planning method and apparatus for horizontal directional drilling
09/18/2003US20030173090 Lubrication and self-cleaning system for expansion mandrel
09/18/2003CA2478442A1 Steerable soil penetration system
09/17/2003EP1343994A1 Apparatus and method for inserting and removing a flexible first material into a second material
09/17/2003EP1343947A1 Igniter for oxygen lance for thermal cutting, drilling etc.
09/17/2003CN2573650Y Bore-change stabilizer
09/17/2003CN2573649Y Shift stabilizer
09/17/2003CN2573648Y Improved drilling tool centering device
09/17/2003CN1443266A Backreaming tool
09/16/2003US6619413 Flightless rock auger for use with pressure drills with quick attachment and method of use
09/16/2003US6619400 Apparatus and method to complete a multilateral junction
09/12/2003WO2003074836A1 Conductor system
09/12/2003WO2003074834A1 Drill equipped with vibrating hammer with eccentric masses for tool support
09/11/2003US20030168218 Conductor system
09/11/2003DE20310467U1 Drill head fabricated from metal plate welded to main supporting strut for horizontal drilling through soil or rock
09/10/2003CN2571989Y Guide joint
09/09/2003US6616378 Device and method for storing and protecting data relating to pipe installation
09/09/2003US6616244 Method and arrangement for determining position of unmanned mining vehicles
09/09/2003US6615932 Arrangement in rock drilling apparatus
09/09/2003CA2147891C Vibrating hole forming device for seismic exploration
09/04/2003US20030165360 Method and apparatus for replacement of underground pipe
09/04/2003US20030164253 Fluid drilling system
09/04/2003US20030164252 Chemically enhanced drilling methods
09/04/2003US20030164251 Expandable apparatus for drift and reaming borehole
09/04/2003US20030164242 Displacement and support device for a portable power tool
09/03/2003EP1339939A1 A drilling tool used in horizontal drilling applications
09/03/2003EP1339938A2 Boring apparatus
09/03/2003EP0800609B1 A drilling method and bit assembly to realize the method
08/2003
08/28/2003WO2003071084A2 System for forming a window and drilling a sidetrack wellbore
08/27/2003EP1338754A2 Method for forming a window in a tubular and apparatus for use in said method
08/27/2003EP1068425B1 Drillstring with stabilisers for re-entering a primary wellbore
08/27/2003CN1119499C Downhole milling device
08/26/2003US6609668 Cavitation and cleaning tool
08/26/2003US6609579 Drilling assembly with a steering device for coiled-tubing operations
08/26/2003US6609576 Method and apparatus for vibratory kinetic energy generation and applications thereof
08/21/2003WO2003069114A1 Casing reaming assembly
08/21/2003WO2003069110A1 Plasma channel drilling process
08/21/2003US20030155140 Method of opening joints between drilling components, and rock drill
08/21/2003DE20307631U1 Method for removal of worn out subterraneous supply duct and simultaneous positioning of new duct
08/21/2003CA2476459A1 Casing reaming assembly
08/20/2003EP1336720A2 Method for forming a window in a tubular and apparatus for use in said method
08/20/2003EP0886720B1 Underwater installation and method for building of an underwater installation
08/20/2003EP0866910B1 Apparatus and method for forming a window or an outline thereof in the casing of a cased wellbore
08/20/2003EP0836667B1 Locating a discrete in-ground boring device
08/20/2003CN2567334Y High-pressure jet drilling tool
08/20/2003CN2567333Y Diameter and position regulating stabalizer
08/20/2003CN1437674A System for creating conduit in a borehole formed in an earth formation
08/20/2003CN1436913A Gas-underbalance well drilling plant and method
08/19/2003US6607045 Steering apparatus
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