| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 02/16/1988 | US4725837 Toroidal coupled telemetry apparatus |
| 02/16/1988 | US4725783 Cable connection head for a well logging cable useful at high temperatures |
| 02/10/1988 | EP0255536A1 Drill tool |
| 02/10/1988 | EP0255513A1 Method and apparatus for data transmission in a well using a flexible line with stiffener |
| 02/10/1988 | CN87104840A Two piece downhole drill chuck |
| 02/09/1988 | US4724434 Method and apparatus using casing for combined transmission of data up a well and fluid flow in a geological formation in the well |
| 02/09/1988 | CA1232627A1 Marine riser coupling assembly |
| 02/09/1988 | CA1232538A1 Centralizer band-collar connection |
| 02/04/1988 | DE3625898A1 Device for releasing a tube connection |
| 02/03/1988 | EP0254900A2 Stabilizer for drill strings |
| 02/03/1988 | EP0122932B1 Well logging sleeve and method for making same |
| 02/03/1988 | CN87208513U Drill set aligner |
| 02/02/1988 | US4723230 High ambient liquid pressure-resistant electrical connector |
| 02/02/1988 | CA1232339A1 Cable connector for use in downhole drilling and logging operations |
| 02/02/1988 | CA1232145A1 Conductor guide system for offshore drilling platform |
| 01/27/1988 | EP0254552A1 Improvements in or relating to joints for tubular members |
| 01/27/1988 | CN87201943U Blades changeable stabilizer |
| 01/26/1988 | US4721355 Optical cable connector assembly including breakable link and process using same |
| 01/26/1988 | CA1231866A1 Sucker rod centralizer |
| 01/20/1988 | EP0253789A2 Threaded coupling for percussion drill rods |
| 01/20/1988 | EP0253477A1 Arrangement for the detection of high voltages |
| 01/19/1988 | CA1231642A1 Casing centralizer/stabilizer |
| 01/14/1988 | WO1988000273A1 Riser tensioner |
| 01/14/1988 | DE3622934A1 Drill tool of compact design |
| 01/07/1988 | EP0251543A2 Downhole stabilisers |
| 01/07/1988 | EP0251488A2 Flexible riser system and method for installing the same |
| 01/05/1988 | US4717183 Conical thread configuration for rapid make-up connection |
| 01/05/1988 | US4716960 Method and system for introducing electric current into a well |
| 01/05/1988 | CA1231044A1 Apparatus for monitoring a parameter in a well |
| 12/30/1987 | CN87208512U Roller type joint for protecting oil pumping rod |
| 12/29/1987 | US4715453 Drilling deviation control tool |
| 12/29/1987 | US4715446 Device and method for the temporary protection of a working tool or measuring instrument fixed to the end of a drill string |
| 12/29/1987 | US4715443 Baffle system for conducting well treating operations |
| 12/29/1987 | US4715442 Apparatus for servicing tubular strings in subterranean wells |
| 12/29/1987 | US4715440 Downhole tools |
| 12/29/1987 | US4715128 Curvature probe and method |
| 12/23/1987 | EP0250016A2 Well cementing tool |
| 12/22/1987 | US4714117 Drainhole well completion |
| 12/17/1987 | WO1987007699A1 Pipe coupling connection sealing apparatus |
| 12/16/1987 | EP0248833A1 Drill string stabiliser. |
| 12/16/1987 | CN86209860U Block hoop type position-restricting equipment |
| 12/15/1987 | US4712815 Metal-to-metal wedge thread coupling connector |
| 12/15/1987 | US4712620 Upper marine riser package |
| 12/15/1987 | CA1230359A1 Pipe joint |
| 12/15/1987 | CA1230358A1 Threaded connection integrally provided with an anti-unthreading lock |
| 12/09/1987 | EP0248615A2 Improvements in drilling apparatus |
| 12/08/1987 | US4711609 Drill tool |
| 12/08/1987 | US4711474 Pipe joint seal rings |
| 12/08/1987 | US4711131 Method and apparatus for determining crack initiation and propagation in metals |
| 12/08/1987 | CA1230010A1 Sucker rods |
| 12/05/1987 | CN86211108U Automatic notch alignment controller of an open power clamp |
| 12/02/1987 | EP0247577A1 Corrosion resistant age hardenable nickel-base alloy |
| 12/02/1987 | EP0247496A2 Drive-in tube |
| 12/02/1987 | EP0247125A1 Improvements in directional drilling of a drill string. |
| 12/01/1987 | US4710712 Method and apparatus for measuring defects in ferromagnetic elements |
| 12/01/1987 | US4710061 Offshore well apparatus and method |
| 12/01/1987 | US4709946 Lined pipe joint |
| 12/01/1987 | US4709761 Well conduit joint sealing system |
| 12/01/1987 | US4709462 Method for assembling a well drilling tool |
| 12/01/1987 | CA1229862A1 Tubular joint with trapped mid-joint metal to metal seal |
| 12/01/1987 | CA1229720A1 Self-aligning connector assembly |
| 11/26/1987 | DE3617592A1 Guide for pump rods |
| 11/25/1987 | EP0246387A1 Threaded coupling for earth-boring members |
| 11/25/1987 | CN87202445U Tightening installation of two-way and double lock locating |
| 11/24/1987 | US4708525 Multiterminators for riser pipes |
| 11/24/1987 | US4708513 Fatigue resistant coupling for tubular members |
| 11/24/1987 | US4708203 Composite drill collar |
| 11/24/1987 | US4708038 Method for machining and improved modified threaded collar |
| 11/18/1987 | CN87103385A Borehole drill construction |
| 11/18/1987 | CN86208253U Well-sleeve reinforcer suitable for oil well and water well |
| 11/17/1987 | US4707001 Liner connection |
| 11/17/1987 | US4706997 For A.P.I. standard round or buttress thread tubing or casing |
| 11/17/1987 | US4706764 Two piece down hole drill chuck |
| 11/17/1987 | US4706744 Wireline tool connector |
| 11/11/1987 | EP0244986A2 Borehole drill construction |
| 11/10/1987 | US4705307 Tubular goods joint |
| 11/10/1987 | US4705121 Pin, especially for clamping a sleeve-shaped protector or centering device on its tube serving for drilling an underground deposit |
| 11/05/1987 | WO1987006673A1 Joint for oil well pipes and method of manufacturing same |
| 11/05/1987 | DE3614010A1 Rock drill rod - has steel shaft with bosses and recesses embedded in cast spiral of polymers e.g. propylene], styrene] PTFE, urethane] |
| 11/04/1987 | EP0244317A1 Device for drilling wells with lateral branches |
| 11/04/1987 | EP0244194A2 Anti-rotation tubular connection for flowlines or the like |
| 11/04/1987 | EP0244048A2 Composite well riser for deep water offshore structures |
| 11/03/1987 | US4704050 J-configured offshore oil production riser |
| 11/03/1987 | US4703959 Threaded pipe connection with compressible seal ring |
| 11/03/1987 | US4703954 Threaded pipe connection having wedge threads |
| 10/27/1987 | US4702328 Roof drilling system |
| 10/27/1987 | US4702325 Apparatus and method for driving casing or conductor pipe |
| 10/27/1987 | US4702321 Drilling, production and oil storage caisson for deep water |
| 10/22/1987 | DE3612762A1 Telescopic drilling implement |
| 10/21/1987 | EP0241521A1 Seal for threaded pipe connection. |
| 10/21/1987 | CN87200119U Rod stabizer for drilling |
| 10/20/1987 | US4700778 Wet connector for use with drill pipe conveyed logging apparatus |
| 10/20/1987 | US4700576 Process and device for executing the screwing of a threaded joint for tubes, equipped with a stop |
| 10/15/1987 | DE3711611A1 Antikorrosions-zusammensetzung und deren verwendung Anti-corrosion composition and its use |
| 10/14/1987 | EP0240490A1 Turbulence cementing sub |
| 10/13/1987 | US4699226 Interchangeable conveying spiral for rock drills |
| 10/13/1987 | US4699224 Method and apparatus for lateral drilling in oil and gas wells |
| 10/13/1987 | US4699216 Blowout preventer for a side entry sub |
| 10/13/1987 | CA1228018A1 Retrievable telemetry system |
| 10/07/1987 | EP0239707A1 Polyvinylidenfluoride composition having improved behaviour in the presence of hydrocarbons - application in the production of tubes for the petroleum industry |