Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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11/06/1986 | WO1986006456A1 Tubular connection having two thread sets with multiple interengaging characteristics |
11/05/1986 | EP0200308A1 Flotation riser and a method of providing an emergency deballasting system for a riser |
11/04/1986 | US4620802 Guide for rotating sucker rods |
11/04/1986 | US4620349 Apparatus for establishing pipe joint seals |
11/04/1986 | CA1213630A1 Connector |
10/29/1986 | EP0198896A1 Device for connecting a boring line with a tube or similar item. |
10/28/1986 | US4619557 Corrosion protection for mooring and riser elements of a tension leg platform |
10/28/1986 | US4619472 Pipe coupling |
10/28/1986 | US4619334 Joint device in extension drill equipment for percussive drilling |
10/28/1986 | US4619323 Method for conducting workover operations |
10/28/1986 | US4619322 Centralizing devices for use down-well |
10/22/1986 | EP0198809A2 Rock drilling device and a drill stem for said device |
10/22/1986 | EP0198672A2 Well tool suspension cable head weak point |
10/21/1986 | USRE32267 Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein |
10/21/1986 | US4618828 Insulating segment for a drill string electrode structure |
10/21/1986 | US4618172 Dual-wall drill pipe |
10/21/1986 | US4618010 Hole opener |
10/15/1986 | CN86102636A Rock drilling device and a drill stem for said device |
10/14/1986 | US4616857 Bi-directional self-retaining cylindrical surface seal |
10/14/1986 | US4616855 Threadless nonrotating steel coupling system |
10/14/1986 | US4616704 Control line protector for use on a well tubular member |
10/14/1986 | US4616537 Pipe connection |
10/08/1986 | EP0196339A1 Centralizer for casings and drill pipes |
10/07/1986 | US4615543 Latch-type tubing protector |
10/07/1986 | US4615542 Telescopic riser joint |
10/07/1986 | US4615402 Drill bit and extension adapter |
10/07/1986 | US4615386 Linear force centralizer |
09/30/1986 | US4614250 Logging method and apparatus using a sonde equipped with measuring pads |
09/30/1986 | US4614120 Determination of the make-up torque for pipe joints |
09/23/1986 | US4613165 Increased tensile strength variable diameter protective joint |
09/23/1986 | US4613161 Coupling device |
09/23/1986 | US4613159 Pressure-assisted dynamic seal apparatus |
09/23/1986 | US4613003 Apparatus for excavating bore holes in rock |
09/23/1986 | US4612987 For absorbing reaction torque from a downhole mud motor |
09/23/1986 | US4612985 Seal assembly for well tools |
09/23/1986 | CA1211773A1 Pipe connectors |
09/23/1986 | CA1211750A1 Drill rod opening device for sectional rod drilling equipment |
09/16/1986 | US4611838 Fluidtight pipe joint |
09/16/1986 | US4611662 Remotely operable releasable pipe connector |
09/16/1986 | US4611656 For use in producing oil, gas and other fluids from subterranean formations |
09/12/1986 | WO1986005231A1 Marine riser fill-up valve |
09/09/1986 | US4610467 Connector |
09/09/1986 | US4610465 Structure and use of remotely releasable pile connectors |
09/09/1986 | US4610320 Cushioning hard tungsten carbide particles with soft elastic metal powder, fusing with hard matrix; well drilling |
09/09/1986 | US4610316 Free flow stabilizer |
09/09/1986 | US4610307 Method and apparatus for selectively straight or directional drilling in subsurface rock formation |
09/09/1986 | US4610176 Method and apparatus for isolating well pump units |
09/09/1986 | CA1211133A1 Unscrewing prevention device |
09/09/1986 | CA1211077A1 Method of mechanically prestressing a tubular apparatus |
09/09/1986 | CA1210946A1 Pipe joint locking device |
09/02/1986 | US4609212 Oil or gas field casing |
08/28/1986 | WO1986004951A1 Drilling pipe for making a drill string |
08/28/1986 | WO1986004950A1 Drilling pipe for making a drill string |
08/27/1986 | EP0192622A2 Drilling equipment for percussive drilling |
08/26/1986 | US4607693 Side-entry sub |
08/26/1986 | CA1210385A1 Adjustable length drilling sub |
08/26/1986 | CA1210321A1 Detachable apparatus for preventing differential pressure sticking in wells |
08/26/1986 | CA1210318A1 Well completion system and process |
08/19/1986 | US4606673 Spar buoy construction having production and oil storage facilities and method of operation |
08/19/1986 | US4606417 Pressure equalized stabilizer apparatus for drill string |
08/19/1986 | CA1210062A1 Apparatus and method for logging wells while drilling |
08/13/1986 | EP0190529A1 Remotely controlled flow-responsive actuating device, in particular for actuating a stabilizer in a drill string |
08/12/1986 | US4605268 Transformer cable connector |
08/12/1986 | US4605079 Drill bit |
08/12/1986 | US4605063 Chemical injection tubing anchor-catcher |
08/12/1986 | CA1209469A1 Test tool for subsea blowout preventer stack |
08/12/1986 | CA1209464A1 Well pumping apparatus and method |
08/12/1986 | CA1209462A1 Method and apparatus for conducting wireline operations in a borehole |
08/12/1986 | CA1209453A1 Pipe bend restrictor |
08/12/1986 | CA1209359A1 Pipe joint locking device |
08/06/1986 | EP0190092A2 Pipe for oil fields |
08/05/1986 | US4603886 Snap type pipe connector |
08/05/1986 | US4603737 Line protector |
08/05/1986 | US4603578 Side entry sub with tension release wireline cable clamp |
07/29/1986 | US4602892 Sucker rod |
07/29/1986 | US4602807 Rod coupling for oil well sucker rods and the like |
07/29/1986 | US4602796 Well conduit joint sealing system |
07/29/1986 | US4602690 Detachable apparatus for preventing differential pressure sticking in wells |
07/29/1986 | CA1208676A1 Coupling device |
07/23/1986 | EP0188343A2 Stabilising tool |
07/22/1986 | US4601498 Deformable metal-to-metal seal |
07/22/1986 | US4601494 Nipple insert |
07/22/1986 | US4601492 Releasable coupling |
07/22/1986 | US4601491 Pipe connector |
07/22/1986 | US4601343 PBR with latching system for tubing |
07/22/1986 | US4601334 Control line protector for oil well tubing string |
07/22/1986 | US4601333 Thermal slide joint |
07/22/1986 | US4601100 For measuring a downhole characteristics in a well |
07/16/1986 | EP0187628A2 Drill element for percussion drilling |
07/15/1986 | US4600225 Tubular connection having a parallel chevron thread |
07/15/1986 | US4600224 Tubular connection having a chevron wedge thread |
07/15/1986 | US4600219 Corrosion-resistant pipe coupling structures |
07/15/1986 | US4600063 Double-taper slip-on drill string stabilizer |
07/15/1986 | US4600062 Shock absorbing drilling tool |
07/15/1986 | US4600059 Line moving apparatus for wireline supported tools |
07/15/1986 | US4600058 Equipment insert and method |
07/15/1986 | US4600055 Tubular well tool receiving conduit |
07/15/1986 | US4600037 Flexible drill pipe |
07/15/1986 | CA1207658A1 Marine riser coupling assembly |
07/15/1986 | CA1207657A1 Device for rapidly connecting rods, tubes and casings, particularly for offshore drilling |