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 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings
Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
09/1998
09/17/1998WO1998040600A1 Abnormal torque absorber for drilling
09/17/1998WO1998040599A1 Rotary and longitudinal shock absorber for drilling
09/16/1998CN2291496Y Centralising device for drilling tool
09/15/1998US5808192 Arrangement for acquiring downhole information
09/15/1998US5806616 Arrangement in a rock drilling equipment
09/15/1998US5806615 Apparatus for use in a wellbore
09/15/1998US5806611 For drilling a borehole in an earth formation
09/15/1998US5806600 Whipstock system
09/15/1998US5806595 Wellbore milling system and method
09/15/1998US5806591 Rod guide
09/12/1998CA2231662A1 Coupled downhole pump for simultaneous injection and production in an oil well
09/11/1998WO1998039592A2 Apparatus and methods for lining of pipes
09/11/1998WO1998031915A3 Apparatus for directing and steering the foremost part of a drillpipe at drillings
09/09/1998EP0862682A2 Autonomous downhole oilfield tool
09/09/1998EP0862681A2 Downhole apparatus and method for expanding a tubing
09/09/1998EP0862679A1 Downhole equipment
09/09/1998EP0697057A4 Drill bit and other downhole tools
09/09/1998CN1192796A Adjustable stablizer for directional drilling
09/08/1998US5803196 Stabilizing drill bit
09/08/1998US5803195 System, method and cutterhead for dry full-area drilling
09/08/1998US5803194 Wear protector for a drilling tool
09/08/1998US5803193 Drill pipe/casing protector assembly
09/08/1998US5803192 Drill bit retainer for a down hole hammer assembly
09/08/1998US5803191 Well entry tool
09/08/1998US5803176 Sidetracking operations
09/08/1998US5803175 Perforating gun connection and method of connecting for live well deployment
09/08/1998US5803170 Well line protective apparatus
09/08/1998US5803167 Computer controlled downhole tools for production well control
09/03/1998WO1998038411A2 Apparatus for use in drilling operations
09/03/1998WO1998038410A1 Downhole clutch with flow ports
09/03/1998WO1998014685A3 Improved emergency release tool
09/02/1998EP0861363A1 Side pocket mandrel
09/02/1998EP0686244B1 Pipe connection with non-dovetail interlocking wedge threads
09/02/1998CN2289874Y No-pin braided annular tubes centering guide
09/01/1998US5801642 Device for exploring an underground formation crossed by a horizontal well comprising several sensors permanently coupled with the wall
09/01/1998US5799949 Annular chamber seal
09/01/1998CA2146323C Pipe connecting assembly and method for joining two lengths of steel pipe by a press-fit connection
08/1998
08/27/1998WO1998037350A1 Pipe connection assembly
08/27/1998WO1998037303A1 Composite spoolable tube
08/27/1998WO1998037302A1 Casing centraliser
08/27/1998WO1998037300A1 Bottomhole assembly and methods of use
08/27/1998WO1998021444A3 Apparatus and method for expanding a liner patch; a stroke indicator; and a tubular patch
08/27/1998CA2578726A1 Bottom hole assembly and methods of use
08/26/1998EP0860907A2 Female wet connector
08/26/1998EP0860902A2 Male pin connector
08/26/1998EP0860638A1 Device and process of laying ceramic tubes without excavation
08/26/1998CN2289050Y Combined sucker rod
08/26/1998CN2289049Y Weighting sucker rod
08/25/1998US5798153 Based on polymerizable resin and reinforcing fibers including a tubular sleeve tightly connected to one end of a rod by plastic deformation
08/25/1998US5797455 Casing centraliser
08/25/1998US5797454 Method and apparatus for downhole fluid blast cleaning of oil well casing
08/25/1998US5797453 For use in a well bore
08/25/1998CA2140203C Pipe alignment apparatus for use on wellhead derrick
08/20/1998WO1998036203A1 Tubular end connection using snap ring
08/20/1998WO1998036202A1 Tubular end connection
08/20/1998WO1998036153A1 Support of a number of parallel pipelines/hoses/cables etc. between a surface vessel and a point on the seabed
08/20/1998WO1998036150A1 Riser bundle
08/20/1998WO1998035875A1 Device by production vessel for oil and/or gas
08/19/1998EP0859122A2 Method and apparatus for completing wells with lateral branches
08/18/1998US5795169 Elevated electrical connector assembly
08/18/1998US5794985 Threaded pipe connection
08/18/1998US5794725 For use in the drilling of a subterranean formation
08/18/1998US5794700 Offshore fluid transfer system
08/18/1998US5794694 Running tool
08/18/1998CA2038378C Stabilized drill tube
08/12/1998EP0857853A2 Drill bit for horizontal directional drilling of rock formations
08/12/1998EP0857852A2 Method for horizontal directional drilling of rock formations
08/12/1998EP0800614B1 Downhole electricity transmission system
08/12/1998EP0765427B1 Hinged drilling tool
08/12/1998EP0720684B1 Method of and apparatus for horizontal well drilling
08/12/1998CN1190150A Drill bit for horizontal directional drilling of rock formations
08/12/1998CN1190149A Method for horizontal directional drilling of rock formations
08/11/1998US5791695 Flexible joint for facilitating bending of tubular segments
08/11/1998US5791416 Well completion device and method of cementing
08/07/1998CA2225153A1 Combination fiber-optic/electrical conductor well logging cable
08/06/1998WO1998034007A1 Tool and method for drilling a lateral well
08/06/1998WO1998034003A1 Drilling assembly with a steering device for coiled-tubing operations
08/06/1998CA2228353A1 High-load hydraulic disconnect
08/05/1998EP0856600A1 LiGa02 single crystal, single-crystal substrate, and method of manufacturing the same
08/05/1998EP0698136B1 Preform or matrix tubular structure for well casing
08/05/1998EP0558534B1 Well completion system
08/04/1998US5788401 Rod joint
08/04/1998US5787982 Hydraulic disconnection device
08/04/1998US5787981 Oil field converting axial force into torque
07/1998
07/30/1998WO1998032946A1 A release equipment for a drill string
07/29/1998EP0855490A2 Drilling apparatus and downhole torque generator
07/29/1998CA2228343A1 Reverse circulation drill assembly
07/28/1998US5785360 Thread coupling for drill string elements for percussive drilling
07/28/1998US5785357 Locking joint
07/28/1998US5785133 Multiple lateral hydrocarbon recovery system and method
07/28/1998US5785125 Mechanical thru-tubing centralizer
07/28/1998US5785120 Tubular patch
07/28/1998US5785092 High-pressure fiber reinforced composite pipe joint
07/28/1998CA2090758C Variable depth grooved drill string member
07/23/1998WO1998031916A1 Buoyancy device and method for using same
07/23/1998WO1998031915A2 Apparatus for directing and steering the foremost part of a drillpipe at drillings
07/23/1998WO1998015712A3 Method of forming wellbores from a main wellbore
07/23/1998WO1998012418A3 Autonomous downhole oilfield tool
07/23/1998EP0862682A3 Autonomous downhole oilfield tool
07/23/1998CA2278804A1 Apparatus for directing and steering the foremost part of a drillpipe at drillings
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