| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 04/11/1996 | WO1996010710A1 Steel pipe joint having high galling resistance and surface treatment method thereof |
| 04/10/1996 | CN2224274Y Hot oil-extracting casing column covered with protection ring |
| 04/09/1996 | US5505560 Fluid transfer system for an offshore moored floating unit |
| 04/09/1996 | US5505502 Multiple-seal underwater pipe-riser connector |
| 04/09/1996 | US5505260 Method and apparatus for wellbore sand control |
| 04/09/1996 | CA2072919C Process to increase petroleum recovery from petroleum reservoirs |
| 04/03/1996 | CN1119884A Clamshell grab for drilling cylindrical holes |
| 04/02/1996 | US5503370 Method and apparatus for the injection of cable into coiled tubing |
| 04/02/1996 | US5503237 Helical drill |
| 04/02/1996 | US5503236 For drilling a borehole in subterranean formations |
| 04/02/1996 | US5503014 Method and apparatus for testing wells using dual coiled tubing |
| 03/29/1996 | CA2147431A1 Self-propelled earth drilling hammer-bit assembly |
| 03/28/1996 | WO1996009459A1 Centralisers |
| 03/27/1996 | EP0703396A1 Threaded joint for oil well pipes |
| 03/27/1996 | EP0703346A2 A floating apparatus for use in a well casing |
| 03/26/1996 | US5501287 Drilling device with telescopic Kellybar |
| 03/26/1996 | US5501285 Method for controlling the head of a drilling or core-drilling device and apparatus for carrying out this method |
| 03/26/1996 | US5501281 Torque-resistant, seal setting force-limited, hydraulically settable well packer structure and associated methods |
| 03/26/1996 | US5501278 Method of achieving high production rates in wells with small diameter tubulars |
| 03/22/1996 | CA2145910A1 Quick release thread protector |
| 03/21/1996 | WO1996008632A1 Drill rod |
| 03/20/1996 | EP0701651A1 Multiple-seal underwater pipe-riser connector |
| 03/20/1996 | CN2222795Y Combined rock drilling rod |
| 03/20/1996 | CN1031335C Method and system for conducting offshore well operations |
| 03/19/1996 | US5499681 Centralizing liner hanger method and system for subterranean multilateral well drilling |
| 03/19/1996 | US5499680 Diverter, diverter retrieving and running tool and method for running and retrieving a diverter |
| 03/19/1996 | CA2083156C Preform device and processes for coating and/or lining a cylindrical volume |
| 03/17/1996 | WO1996008633A1 A device for coil tubing operations |
| 03/13/1996 | EP0701045A2 Multilateral well drilling and completion method and apparatus |
| 03/13/1996 | EP0701043A2 Torque-resistant well packer |
| 03/13/1996 | EP0701042A2 Decentring method and apparatus, especially for multilateral wells |
| 03/13/1996 | EP0701041A2 Well flow conductor and manufacture thereof |
| 03/13/1996 | EP0701040A2 Downhole diverter and retrieving tool therefor |
| 03/13/1996 | CN1118618A Flexible riser system |
| 03/12/1996 | US5498035 Pipe coupling |
| 03/07/1996 | DE4431229A1 Anordnung zum Niederbringen einer Tiefbohrung mit einem hydrostatischen Abkopplungselement Arrangement for sinking a deep borehole with a hydrostatic decoupling element |
| 03/06/1996 | EP0553309B1 Drilling pipe |
| 03/05/1996 | US5496044 Annular chamber seal |
| 03/05/1996 | US5495755 Slick line system with real-time surface display |
| 03/01/1996 | CA2132458A1 Multi- port oilfield liner connector |
| 02/28/1996 | EP0698136A1 Preform or matrix tubular structure for well casing |
| 02/27/1996 | US5495547 Combination fiber-optic/electrical conductor well logging cable |
| 02/27/1996 | US5494382 Drill bit |
| 02/27/1996 | US5494104 Snap-on rod guide |
| 02/27/1996 | CA2156981A1 Composite well flow conductor for subterranean multilateral well drilling and completion and method of manufacture therefor |
| 02/22/1996 | WO1996005409A1 Resilient spider for well installation |
| 02/21/1996 | EP0697058A1 Drill pipe for directional drilling |
| 02/21/1996 | EP0697057A1 Drill bit and other downhole tools |
| 02/21/1996 | EP0546135B1 Device for adjusting the path azimuth of a rotary drilling tool |
| 02/20/1996 | US5493626 Reduced diameter down-hole instrument electrical/optical fiber cable |
| 02/20/1996 | US5492375 Drill pipe with improved connectors |
| 02/20/1996 | US5492174 Rod guide with enhanced erodable volume |
| 02/15/1996 | WO1996004456A1 A drilling apparatus |
| 02/14/1996 | CN1031007C Hole opener for the top hole section of oil/gas wells |
| 02/13/1996 | US5490571 Sub-assembly for dust suppression in rock drilling |
| 02/13/1996 | CA2140085A1 Grease applicator for a drill shaft |
| 02/08/1996 | WO1996003606A1 Connection coupling for a traction device for laying cables or the like |
| 02/08/1996 | WO1996003605A1 Drill pipe with improved connectors |
| 02/08/1996 | WO1996003568A1 Sacrificial wear bearing |
| 02/06/1996 | US5488992 Spoolable flexible sliding sleeve |
| 02/01/1996 | WO1996002730A1 Quick connect coupling |
| 02/01/1996 | WO1996002729A1 Thread coupling |
| 02/01/1996 | WO1996002728A1 Emf sacrificial anode sub and method to deter bit balling |
| 02/01/1996 | CA2192204A1 Thread coupling |
| 01/31/1996 | CN1030860C Device for mounting a flexible line comprising a curvature limiter |
| 01/30/1996 | US5487432 Soil penetration tool |
| 01/30/1996 | US5487426 Rod guide with removable vanes |
| 01/30/1996 | CA2014145C Milling tool and combined stabiliser |
| 01/23/1996 | US5485745 Modular downhole inspection system for coiled tubing |
| 01/23/1996 | CA2007070C Dry pneumatic system for hard rock shaft drilling |
| 01/18/1996 | WO1996001357A1 Helical stress relief groove for drill pipe |
| 01/18/1996 | DE4441719C1 Method for cladding shaft, esp. well shaft |
| 01/17/1996 | EP0426820B1 Process and device for transmitting data signals and/or control signals in a pipe train |
| 01/16/1996 | US5484021 Method and apparatus for forming a window in a subsurface well conduit |
| 01/16/1996 | US5484017 Whipstock assembly for a sleeved casing |
| 01/16/1996 | US5483988 Spoolable coiled tubing mandrel and gas lift valves |
| 01/16/1996 | US5483987 Remote control method and device for actuating an equipment-application to a drill string |
| 01/11/1996 | WO1996000834A1 Drag block for increasing the fluid resistance in a well production tubing |
| 01/11/1996 | WO1996000821A1 Preperforated coiled tubing |
| 01/11/1996 | CA2193864A1 Preperforated coiled tubing |
| 01/10/1996 | EP0691484A1 Coupling, especially for a diamond drill bit with a tube shaft and a tube thread connection |
| 01/10/1996 | CN1114710A Drilling a bore hole having a short radius curved section followed by a straight section |
| 01/03/1996 | EP0689636A1 Clamshell grab for drilling cylindrical holes |
| 01/03/1996 | EP0689635A1 Casing pipe with coupling sleeves at one or both ends |
| 01/02/1996 | US5480264 Offshore pipeline system |
| 12/26/1995 | US5478970 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 12/26/1995 | US5478504 Method and apparatus for eliminating severe slug in multi-phase flow subsea lines |
| 12/26/1995 | US5477921 Method and system for logging a well while fishing for the logging tool |
| 12/21/1995 | WO1995034741A1 Hinged drilling tool |
| 12/21/1995 | WO1995034740A1 Drilling apparatus |
| 12/20/1995 | EP0516806B1 Device for remotely operating an assembly comprising a bean/needle system, and use thereof in a drill string |
| 12/19/1995 | US5476421 Shock absorbing assembly |
| 12/19/1995 | US5476148 Tool for maintaining wellbore penetration |
| 12/19/1995 | CA2002164C Running tool for liner hanger |
| 12/14/1995 | WO1995033912A1 Hydraulic disconnection device |
| 12/14/1995 | WO1995033911A1 Drill bit |
| 12/13/1995 | EP0686753A2 A release device |
| 12/13/1995 | EP0686752A1 Directional drilling methods and apparatus |
| 12/13/1995 | EP0686244A1 Pipe connection with non-dovetail interlocking wedge threads |
| 12/13/1995 | CN1030512C Disc drill bit |