Patents
Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
09/1990
09/12/1990EP0387218A1 Device in impact machines
09/12/1990EP0387217A1 Device in impact machines
09/12/1990EP0386373A2 Oil field tubular connection
09/12/1990EP0386372A2 Threaded pipe joint having improved seal ring entrapment
09/11/1990US4955644 Drill pipe coupling
09/11/1990US4955439 Self-propelled subsoil penetrating tool system
09/11/1990CA1273866A1 Method and apparatus for absorbing shock
09/08/1990CA2004019A1 Oil field tubular connection
09/08/1990CA2002687A1 Threaded pipe joint having improved seal ring entrapment
09/05/1990EP0385932A2 Mechanical damper system for a floating structure
09/05/1990CN2061602U Multi-purpose pipe of motor-pumped well
09/05/1990CN1009469B Borehole drill construction
09/04/1990US4953640 Quick detach bit
09/04/1990US4953636 Electrical conductor arrangements for pipe system
09/04/1990CA1273565A1 Heating system for rathole oil well
08/1990
08/29/1990EP0384554A1 Segmental tubular connectors
08/29/1990EP0301060B1 Device for opening gas sources in refuse tips, and for exploring and cleansing materials for recycling and contaminated ground
08/29/1990EP0271566B1 Riser tensioner
08/29/1990EP0248833B1 Drill string stabiliser
08/28/1990US4951760 Remote control actuation device
08/28/1990US4951746 Latching seal unit
08/23/1990DE3905106A1 Deep-hole hammer drill with water-flushing arrangement
08/22/1990EP0383737A1 Drill bit
08/22/1990EP0383225A1 Device for the detachable connection of a rotary table to a drill pipe
08/21/1990US4949797 Drill pipe
08/21/1990US4949795 Rotary rapid excavation system
08/21/1990US4949791 Method and apparatus for securing and releasing continuous tubing in a subterranean well
08/21/1990CA2007370A1 Segmental tubular connectors
08/15/1990CN1044694A Gripper for drilling rods in rotator for drilling apparatus
08/14/1990US4947944 Device for steering a drilling tool and/or drill string
08/13/1990CA2009861A1 Drill bit
08/09/1990DE3927044C1 Supply pipe laying equipment - incorporates vibrating bit head and conical tip to displace soil
08/08/1990CN2060180U Screw thread sealing film
08/08/1990CN1009122B High bending strength ratio drill string components
08/08/1990CA2007793A1 Sucker rod guide bearing
08/07/1990US4946312 Apparatus for opening up garbage dumping ground gas sources and for the exploration and sanification of old deposit site burdens and contaminated soils
08/07/1990US4946201 Oil field tubular connection
08/07/1990CA1272386A1 Thread structure for percussion rock drilling
08/01/1990EP0379743A1 Method for cleaning soil by conducting through a heated medium
08/01/1990CN2059936U Pump keeper for undergroud drilling
08/01/1990CN1044321A Safety small bushing with mud scraping disc
07/1990
07/31/1990US4944538 Threaded pipe joint having improved seal ring entrapment
07/26/1990WO1990008245A1 Drilling apparatus with non-rotating member
07/25/1990CN2059678U Screw-off preventing drill pipe
07/24/1990US4943210 Pump control system, level sensor switch and switch housing
07/24/1990US4943094 Threaded pin and box construction for composite tubulars
07/24/1990US4942932 Auger drilling system
07/24/1990US4942931 Drilling tool having frictionally rotatable drilling head
07/24/1990US4942925 Liner isolation and well completion system
07/24/1990CA1271980A1 Method and system for introducing electric current into a well
07/18/1990EP0378348A1 A cast-in-place piling method and apparatus
07/18/1990CN2059452U Open support joint equipped to turbine drill set
07/18/1990CN2059451U Overflow-proof blowout-preventing drilling joint
07/17/1990US4941783 Drilling device
07/17/1990US4941538 One-piece drill bit with improved gage design
07/17/1990US4941349 Coaxial coiled-tubing cable head
07/12/1990WO1990007628A1 Wireline releasing device and method of releasing wireline
07/12/1990WO1990007627A1 System and method for sealed connection between two abutting tube ends
07/12/1990WO1990007625A1 Directional drilling apparatus
07/11/1990EP0377382A1 Method for integrating a metallic sleeve in a tube of a wrapped composite material
07/11/1990EP0377373A1 Controlled directional drilling assembly with a variable-angle elbow element, and its use
07/11/1990EP0377234A1 Method and apparatus for monitoring the integrity of coiled tubing
07/10/1990US4940098 Reverse circulation drill rod
07/04/1990EP0376805A1 Controlled directional drilling assembly with a variable geometry stabiliser, and its use
07/04/1990EP0376239A2 Drill string
07/03/1990US4938299 For positioning downhole within a drill pipe string
07/03/1990US4938285 Ultra-high molecular weight polyethylene sucker rod guide
07/03/1990CA1271087A1 Sucker rod coupling pin prepared from fiber- reinforced plastics material
06/1990
06/28/1990WO1990007048A1 Dual wall well development tool
06/27/1990EP0374788A2 Telescopic drill string
06/27/1990CA2006200A1 Wireline releasing device and method of releasing wireline
06/26/1990US4936710 Mooring line tensioning and damping system
06/26/1990US4936618 Grapple connection for coiled tubing
06/20/1990CN2058425U Navigation drill short joint for underwell motor
06/19/1990US4934871 Offshore well support system
06/19/1990US4934870 Production platform using a damper-tensioner
06/14/1990WO1990006419A1 Universal flexbowl wellhead and well completion method
06/14/1990WO1990006416A1 A telescopically extensible drill
06/14/1990WO1990004699A3 Float collar and plug for use in wells
06/14/1990WO1990004082A3 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same
06/14/1990CA2005605A1 Dual wall well development tool
06/13/1990EP0372225A2 Boring ram
06/13/1990DE3838537A1 Process for the underground production and for the lining of elongate cavities, in which it is not possible to walk, by the in-situ pipe
06/12/1990US4932811 Well head conductor and/or caisson support system
06/12/1990CA1270280A1 Tubular connections having two thread sets with multiple interengaging characteristics
06/12/1990CA1270191A1 Line moving apparatus for wireline supported tools
06/06/1990EP0371906A2 Wellbore tool with hall effect coupling
05/1990
05/30/1990EP0370709A1 Flow pulsing apparatus for drill string
05/30/1990EP0370591A2 Downhole chemical cutting tool
05/29/1990US4928999 Elastomeric guard seal for tubular connections
05/29/1990US4928771 Cable suspended pumping system
05/29/1990US4928768 Sump packer latching mechanism
05/29/1990US4928764 Wireline tool cable head overload apparatus
05/29/1990US4928761 Two-way plugs for wells
05/29/1990CA1269686A2 Pipe connection
05/29/1990CA1269684A1 Screw joint coupling for oil pipes
05/28/1990CA2002484A1 Wellbore tool with hall effect coupling
05/22/1990US4927403 High voltage insulative shaft coupler
05/22/1990US4927386 Electrical cable connector for use in oil wells
05/22/1990US4926950 Method for monitoring the wear of a rotary type drill bit