| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 09/12/1990 | EP0387218A1 Device in impact machines |
| 09/12/1990 | EP0387217A1 Device in impact machines |
| 09/12/1990 | EP0386373A2 Oil field tubular connection |
| 09/12/1990 | EP0386372A2 Threaded pipe joint having improved seal ring entrapment |
| 09/11/1990 | US4955644 Drill pipe coupling |
| 09/11/1990 | US4955439 Self-propelled subsoil penetrating tool system |
| 09/11/1990 | CA1273866A1 Method and apparatus for absorbing shock |
| 09/08/1990 | CA2004019A1 Oil field tubular connection |
| 09/08/1990 | CA2002687A1 Threaded pipe joint having improved seal ring entrapment |
| 09/05/1990 | EP0385932A2 Mechanical damper system for a floating structure |
| 09/05/1990 | CN2061602U Multi-purpose pipe of motor-pumped well |
| 09/05/1990 | CN1009469B Borehole drill construction |
| 09/04/1990 | US4953640 Quick detach bit |
| 09/04/1990 | US4953636 Electrical conductor arrangements for pipe system |
| 09/04/1990 | CA1273565A1 Heating system for rathole oil well |
| 08/29/1990 | EP0384554A1 Segmental tubular connectors |
| 08/29/1990 | EP0301060B1 Device for opening gas sources in refuse tips, and for exploring and cleansing materials for recycling and contaminated ground |
| 08/29/1990 | EP0271566B1 Riser tensioner |
| 08/29/1990 | EP0248833B1 Drill string stabiliser |
| 08/28/1990 | US4951760 Remote control actuation device |
| 08/28/1990 | US4951746 Latching seal unit |
| 08/23/1990 | DE3905106A1 Deep-hole hammer drill with water-flushing arrangement |
| 08/22/1990 | EP0383737A1 Drill bit |
| 08/22/1990 | EP0383225A1 Device for the detachable connection of a rotary table to a drill pipe |
| 08/21/1990 | US4949797 Drill pipe |
| 08/21/1990 | US4949795 Rotary rapid excavation system |
| 08/21/1990 | US4949791 Method and apparatus for securing and releasing continuous tubing in a subterranean well |
| 08/21/1990 | CA2007370A1 Segmental tubular connectors |
| 08/15/1990 | CN1044694A Gripper for drilling rods in rotator for drilling apparatus |
| 08/14/1990 | US4947944 Device for steering a drilling tool and/or drill string |
| 08/13/1990 | CA2009861A1 Drill bit |
| 08/09/1990 | DE3927044C1 Supply pipe laying equipment - incorporates vibrating bit head and conical tip to displace soil |
| 08/08/1990 | CN2060180U Screw thread sealing film |
| 08/08/1990 | CN1009122B High bending strength ratio drill string components |
| 08/08/1990 | CA2007793A1 Sucker rod guide bearing |
| 08/07/1990 | US4946312 Apparatus for opening up garbage dumping ground gas sources and for the exploration and sanification of old deposit site burdens and contaminated soils |
| 08/07/1990 | US4946201 Oil field tubular connection |
| 08/07/1990 | CA1272386A1 Thread structure for percussion rock drilling |
| 08/01/1990 | EP0379743A1 Method for cleaning soil by conducting through a heated medium |
| 08/01/1990 | CN2059936U Pump keeper for undergroud drilling |
| 08/01/1990 | CN1044321A Safety small bushing with mud scraping disc |
| 07/31/1990 | US4944538 Threaded pipe joint having improved seal ring entrapment |
| 07/26/1990 | WO1990008245A1 Drilling apparatus with non-rotating member |
| 07/25/1990 | CN2059678U Screw-off preventing drill pipe |
| 07/24/1990 | US4943210 Pump control system, level sensor switch and switch housing |
| 07/24/1990 | US4943094 Threaded pin and box construction for composite tubulars |
| 07/24/1990 | US4942932 Auger drilling system |
| 07/24/1990 | US4942931 Drilling tool having frictionally rotatable drilling head |
| 07/24/1990 | US4942925 Liner isolation and well completion system |
| 07/24/1990 | CA1271980A1 Method and system for introducing electric current into a well |
| 07/18/1990 | EP0378348A1 A cast-in-place piling method and apparatus |
| 07/18/1990 | CN2059452U Open support joint equipped to turbine drill set |
| 07/18/1990 | CN2059451U Overflow-proof blowout-preventing drilling joint |
| 07/17/1990 | US4941783 Drilling device |
| 07/17/1990 | US4941538 One-piece drill bit with improved gage design |
| 07/17/1990 | US4941349 Coaxial coiled-tubing cable head |
| 07/12/1990 | WO1990007628A1 Wireline releasing device and method of releasing wireline |
| 07/12/1990 | WO1990007627A1 System and method for sealed connection between two abutting tube ends |
| 07/12/1990 | WO1990007625A1 Directional drilling apparatus |
| 07/11/1990 | EP0377382A1 Method for integrating a metallic sleeve in a tube of a wrapped composite material |
| 07/11/1990 | EP0377373A1 Controlled directional drilling assembly with a variable-angle elbow element, and its use |
| 07/11/1990 | EP0377234A1 Method and apparatus for monitoring the integrity of coiled tubing |
| 07/10/1990 | US4940098 Reverse circulation drill rod |
| 07/04/1990 | EP0376805A1 Controlled directional drilling assembly with a variable geometry stabiliser, and its use |
| 07/04/1990 | EP0376239A2 Drill string |
| 07/03/1990 | US4938299 For positioning downhole within a drill pipe string |
| 07/03/1990 | US4938285 Ultra-high molecular weight polyethylene sucker rod guide |
| 07/03/1990 | CA1271087A1 Sucker rod coupling pin prepared from fiber- reinforced plastics material |
| 06/28/1990 | WO1990007048A1 Dual wall well development tool |
| 06/27/1990 | EP0374788A2 Telescopic drill string |
| 06/27/1990 | CA2006200A1 Wireline releasing device and method of releasing wireline |
| 06/26/1990 | US4936710 Mooring line tensioning and damping system |
| 06/26/1990 | US4936618 Grapple connection for coiled tubing |
| 06/20/1990 | CN2058425U Navigation drill short joint for underwell motor |
| 06/19/1990 | US4934871 Offshore well support system |
| 06/19/1990 | US4934870 Production platform using a damper-tensioner |
| 06/14/1990 | WO1990006419A1 Universal flexbowl wellhead and well completion method |
| 06/14/1990 | WO1990006416A1 A telescopically extensible drill |
| 06/14/1990 | WO1990004699A3 Float collar and plug for use in wells |
| 06/14/1990 | WO1990004082A3 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 06/14/1990 | CA2005605A1 Dual wall well development tool |
| 06/13/1990 | EP0372225A2 Boring ram |
| 06/13/1990 | DE3838537A1 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 |
| 06/12/1990 | US4932811 Well head conductor and/or caisson support system |
| 06/12/1990 | CA1270280A1 Tubular connections having two thread sets with multiple interengaging characteristics |
| 06/12/1990 | CA1270191A1 Line moving apparatus for wireline supported tools |
| 06/06/1990 | EP0371906A2 Wellbore tool with hall effect coupling |
| 05/30/1990 | EP0370709A1 Flow pulsing apparatus for drill string |
| 05/30/1990 | EP0370591A2 Downhole chemical cutting tool |
| 05/29/1990 | US4928999 Elastomeric guard seal for tubular connections |
| 05/29/1990 | US4928771 Cable suspended pumping system |
| 05/29/1990 | US4928768 Sump packer latching mechanism |
| 05/29/1990 | US4928764 Wireline tool cable head overload apparatus |
| 05/29/1990 | US4928761 Two-way plugs for wells |
| 05/29/1990 | CA1269686A2 Pipe connection |
| 05/29/1990 | CA1269684A1 Screw joint coupling for oil pipes |
| 05/28/1990 | CA2002484A1 Wellbore tool with hall effect coupling |
| 05/22/1990 | US4927403 High voltage insulative shaft coupler |
| 05/22/1990 | US4927386 Electrical cable connector for use in oil wells |
| 05/22/1990 | US4926950 Method for monitoring the wear of a rotary type drill bit |