| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 06/16/1987 | CA1223004A1 Pre-set torque limiter sub |
| 06/10/1987 | EP0138820B1 Plant for making bore-holes in the side walls of underground exploitation chambers of small width |
| 06/09/1987 | US4671703 Apparatus for driving pipes through the ground |
| 06/09/1987 | US4671544 Seal for threaded pipe connection |
| 06/09/1987 | US4671361 Method and apparatus for hydraulically releasing from a gravel screen |
| 06/04/1987 | WO1987003330A1 Method of making pump rods |
| 06/04/1987 | WO1987003329A1 Improvements in directional drilling of a drill string |
| 06/04/1987 | WO1987003233A1 Method of making pump rods |
| 06/02/1987 | US4669916 Unitized TLP anchor template with elevated well template |
| 06/02/1987 | CA1222535A1 Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| 06/02/1987 | CA1222505A1 Targetable drill with pressure telemetering of drill parameters |
| 06/02/1987 | CA1222448A1 Casing shoe |
| 05/27/1987 | CN86107293A 管接头 Fittings |
| 05/26/1987 | US4668117 In a well sucker rod string |
| 05/26/1987 | CA1222287A1 Method and apparatus for measuring defects in ferromagnetic tubing |
| 05/26/1987 | CA1222204A1 Insertion drive system for tree savers |
| 05/21/1987 | DE3540870A1 Threaded connector or plug connector |
| 05/20/1987 | EP0115542B1 Tapered threaded member with guide |
| 05/20/1987 | CN86107149A Thread coupling for percussion drilling |
| 05/19/1987 | US4665996 Method for reducing friction in drilling operations |
| 05/19/1987 | CA1221909A1 Centralizing devices for use down-well |
| 05/14/1987 | DE3539450A1 Drilling method for sinking earth bores, drill rods, and drill-rod joint for this |
| 05/13/1987 | EP0221867A2 A method of constructing a pump rod by joining sucker rods for drawing up oil and sucker rods, coupling elements and an assembly tool for performing the method |
| 05/13/1987 | EP0221634A1 A powder-metallurgy method for producing clad tubular product |
| 05/12/1987 | US4665305 Corrosion resistant metal pipe with electrode for oil wells |
| 05/12/1987 | US4664206 Stabilizer for drillstems |
| 05/12/1987 | US4664189 Method and device for carrying out measurements and operations in a well |
| 05/12/1987 | CA1221625A1 Well conduit centralizer |
| 05/06/1987 | EP0220800A1 A powder-metallurgy method for producing tubular product |
| 05/05/1987 | US4662785 Apparatus and method for connecting subsea production equipment to a floating facility |
| 05/05/1987 | US4662774 Parabolic end fitting |
| 05/05/1987 | US4662663 Tubular member for underwater connection having volume |
| 05/05/1987 | US4662659 Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers |
| 05/05/1987 | US4662461 Fixed-contact stabilizer |
| 05/05/1987 | US4662437 Electrically stimulated well production system with flexible tubing conductor |
| 05/05/1987 | US4662402 System for protecting machine threads |
| 04/30/1987 | DE3538191A1 Rock drill |
| 04/30/1987 | DE3537633A1 Device for rubbing grease over a thread, in particular of tubular structural parts |
| 04/29/1987 | EP0220150A1 Pipe joint |
| 04/29/1987 | EP0220147A2 Thread coupling for percussion drilling |
| 04/29/1987 | EP0220088A1 Threaded joint for steel pipes comprising sealing means situated in the threads |
| 04/28/1987 | US4660910 Apparatus for electrically interconnecting multi-sectional well tools |
| 04/28/1987 | US4660635 Equipment for a pipe string such as a drill-pipe string, comprising a side entry connection for passing a cable |
| 04/28/1987 | CA1221024A1 Downhole self-aligning latch subassembly |
| 04/23/1987 | WO1987002439A1 Seal for threaded pipe connection |
| 04/23/1987 | WO1987002409A1 Turbulence cementing sub |
| 04/21/1987 | US4659119 Latching connector |
| 04/21/1987 | US4659115 Reducer coupling and positioner tool for the coupling |
| 04/21/1987 | US4658916 Drill shaft for boring earth material |
| 04/21/1987 | US4658915 Easy break-out tool joint and method |
| 04/21/1987 | US4658896 Apparatus for a tubular string and method of attaching the same thereto |
| 04/21/1987 | US4658895 Gravel pack safety sub |
| 04/21/1987 | CA1220651A1 Pipes resistant to hydrosulfuric acid |
| 04/15/1987 | EP0217995A2 A device that may be applied to perforating drills for the drilling of foundation holes,and the insertion and stabilization of reinforcement tubes |
| 04/14/1987 | US4657445 Core drill and method of removing a core therefrom |
| 04/14/1987 | US4657092 Circulation reversing tool |
| 04/14/1987 | US4657076 Chemical injection tube mounting structure for geothermal well |
| 04/14/1987 | US4656962 Buoyancy support for deep-ocean struts |
| 04/08/1987 | CN85108884A Protection device for oil field development water-injection casing pipes |
| 04/07/1987 | US4655485 Seals for use in oil and gas well production tubing |
| 04/07/1987 | US4655479 Pre-set torque limiter sub |
| 04/07/1987 | US4655290 Latching production seal assembly |
| 03/31/1987 | US4653953 Sucker rod construction |
| 03/31/1987 | US4653810 Pre-bolting system for underground mines |
| 03/31/1987 | US4653598 Drainhole drilling assembly with oriented elliptic drill collar |
| 03/31/1987 | CA1219855A1 Floating cushion sub |
| 03/31/1987 | CA1219735A1 Hose clamp for supporting a vertically extending control line |
| 03/26/1987 | WO1987001787A1 Threaded joint for steel pipes comprising a seal arranged at the threads |
| 03/26/1987 | WO1987001786A1 Cylindrical threaded connection with uniform interference |
| 03/26/1987 | WO1987001748A1 A drilling, production and oil storage caisson for deep water |
| 03/26/1987 | DE3533344A1 Wear-resistant deposition on highly stressed, metallic components, method of applying the deposition and apparatus for carrying out the method |
| 03/25/1987 | EP0215522A2 Reducer coupling and positioner tool for the coupling |
| 03/24/1987 | US4652021 Quick-action coupling for an extension tube used in oil-well drilling |
| 03/24/1987 | US4651823 Centralizer |
| 03/17/1987 | US4651101 Induction logging sonde with metallic support |
| 03/17/1987 | US4649960 Filament wound interlaminate tubular attachment |
| 03/12/1987 | WO1987001429A1 Fatigue resistant coupling for tubular members |
| 03/11/1987 | CN85106898A Joining apparatus for lengthening drilling tools of percussion drilling |
| 03/10/1987 | US4649349 Device for automatically compensating the magnetism of drill string members |
| 03/10/1987 | US4648848 Spar buoy fluid transfer system |
| 03/10/1987 | US4648747 Integral buoyant riser |
| 03/10/1987 | US4648627 Stabbing connector |
| 03/10/1987 | US4648469 Alleviating vortex shedding stress problems |
| 03/10/1987 | US4648444 Tensile ring cable head assembly |
| 03/04/1987 | EP0212288A2 Improved oilfield tubular joint and method of manufacturing |
| 03/04/1987 | EP0211926A1 Drilling pipe for making a drill string |
| 03/04/1987 | EP0211925A1 Drilling pipe for making a drill string |
| 03/04/1987 | EP0126740B1 A method employed in long-hole drilling and a drill rod system |
| 03/03/1987 | US4647255 Pipe bend restrictor |
| 03/03/1987 | US4647099 Lifting head |
| 03/03/1987 | US4647085 Sealing arrangement for pin and box threaded connection of tubular members |
| 03/03/1987 | US4646842 Retrievable well bore assembly |
| 03/03/1987 | US4646840 Flotation riser |
| 03/03/1987 | US4646831 Precision connector for well instrumentation |
| 02/24/1987 | CA1218296A1 Method and apparatus for production of subsea hydrocarbons using a floating vessel |
| 02/17/1987 | US4643614 Method and apparatus for the installation of a hose between a platform and a submerged buoy |
| 02/17/1987 | US4643467 Threaded tubing seals |
| 02/17/1987 | US4643456 Locking thread saver |
| 02/12/1987 | DE3631424A1 Method of disposing of harmful substances with simultaneous energy generation |
| 02/11/1987 | CN86105009A Installation devices for drill casings and like underground conduits |