Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings
Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
11/1986
11/06/1986WO1986006456A1 Tubular connection having two thread sets with multiple interengaging characteristics
11/05/1986EP0200308A1 Flotation riser and a method of providing an emergency deballasting system for a riser
11/04/1986US4620802 Guide for rotating sucker rods
11/04/1986US4620349 Apparatus for establishing pipe joint seals
11/04/1986CA1213630A1 Connector
10/1986
10/29/1986EP0198896A1 Device for connecting a boring line with a tube or similar item.
10/28/1986US4619557 Corrosion protection for mooring and riser elements of a tension leg platform
10/28/1986US4619472 Pipe coupling
10/28/1986US4619334 Joint device in extension drill equipment for percussive drilling
10/28/1986US4619323 Method for conducting workover operations
10/28/1986US4619322 Centralizing devices for use down-well
10/22/1986EP0198809A2 Rock drilling device and a drill stem for said device
10/22/1986EP0198672A2 Well tool suspension cable head weak point
10/21/1986USRE32267 Process for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein
10/21/1986US4618828 Insulating segment for a drill string electrode structure
10/21/1986US4618172 Dual-wall drill pipe
10/21/1986US4618010 Hole opener
10/15/1986CN86102636A Rock drilling device and a drill stem for said device
10/14/1986US4616857 Bi-directional self-retaining cylindrical surface seal
10/14/1986US4616855 Threadless nonrotating steel coupling system
10/14/1986US4616704 Control line protector for use on a well tubular member
10/14/1986US4616537 Pipe connection
10/08/1986EP0196339A1 Centralizer for casings and drill pipes
10/07/1986US4615543 Latch-type tubing protector
10/07/1986US4615542 Telescopic riser joint
10/07/1986US4615402 Drill bit and extension adapter
10/07/1986US4615386 Linear force centralizer
09/1986
09/30/1986US4614250 Logging method and apparatus using a sonde equipped with measuring pads
09/30/1986US4614120 Determination of the make-up torque for pipe joints
09/23/1986US4613165 Increased tensile strength variable diameter protective joint
09/23/1986US4613161 Coupling device
09/23/1986US4613159 Pressure-assisted dynamic seal apparatus
09/23/1986US4613003 Apparatus for excavating bore holes in rock
09/23/1986US4612987 For absorbing reaction torque from a downhole mud motor
09/23/1986US4612985 Seal assembly for well tools
09/23/1986CA1211773A1 Pipe connectors
09/23/1986CA1211750A1 Drill rod opening device for sectional rod drilling equipment
09/16/1986US4611838 Fluidtight pipe joint
09/16/1986US4611662 Remotely operable releasable pipe connector
09/16/1986US4611656 For use in producing oil, gas and other fluids from subterranean formations
09/12/1986WO1986005231A1 Marine riser fill-up valve
09/09/1986US4610467 Connector
09/09/1986US4610465 Structure and use of remotely releasable pile connectors
09/09/1986US4610320 Cushioning hard tungsten carbide particles with soft elastic metal powder, fusing with hard matrix; well drilling
09/09/1986US4610316 Free flow stabilizer
09/09/1986US4610307 Method and apparatus for selectively straight or directional drilling in subsurface rock formation
09/09/1986US4610176 Method and apparatus for isolating well pump units
09/09/1986CA1211133A1 Unscrewing prevention device
09/09/1986CA1211077A1 Method of mechanically prestressing a tubular apparatus
09/09/1986CA1210946A1 Pipe joint locking device
09/02/1986US4609212 Oil or gas field casing
08/1986
08/28/1986WO1986004951A1 Drilling pipe for making a drill string
08/28/1986WO1986004950A1 Drilling pipe for making a drill string
08/27/1986EP0192622A2 Drilling equipment for percussive drilling
08/26/1986US4607693 Side-entry sub
08/26/1986CA1210385A1 Adjustable length drilling sub
08/26/1986CA1210321A1 Detachable apparatus for preventing differential pressure sticking in wells
08/26/1986CA1210318A1 Well completion system and process
08/19/1986US4606673 Spar buoy construction having production and oil storage facilities and method of operation
08/19/1986US4606417 Pressure equalized stabilizer apparatus for drill string
08/19/1986CA1210062A1 Apparatus and method for logging wells while drilling
08/13/1986EP0190529A1 Remotely controlled flow-responsive actuating device, in particular for actuating a stabilizer in a drill string
08/12/1986US4605268 Transformer cable connector
08/12/1986US4605079 Drill bit
08/12/1986US4605063 Chemical injection tubing anchor-catcher
08/12/1986CA1209469A1 Test tool for subsea blowout preventer stack
08/12/1986CA1209464A1 Well pumping apparatus and method
08/12/1986CA1209462A1 Method and apparatus for conducting wireline operations in a borehole
08/12/1986CA1209453A1 Pipe bend restrictor
08/12/1986CA1209359A1 Pipe joint locking device
08/06/1986EP0190092A2 Pipe for oil fields
08/05/1986US4603886 Snap type pipe connector
08/05/1986US4603737 Line protector
08/05/1986US4603578 Side entry sub with tension release wireline cable clamp
07/1986
07/29/1986US4602892 Sucker rod
07/29/1986US4602807 Rod coupling for oil well sucker rods and the like
07/29/1986US4602796 Well conduit joint sealing system
07/29/1986US4602690 Detachable apparatus for preventing differential pressure sticking in wells
07/29/1986CA1208676A1 Coupling device
07/23/1986EP0188343A2 Stabilising tool
07/22/1986US4601498 Deformable metal-to-metal seal
07/22/1986US4601494 Nipple insert
07/22/1986US4601492 Releasable coupling
07/22/1986US4601491 Pipe connector
07/22/1986US4601343 PBR with latching system for tubing
07/22/1986US4601334 Control line protector for oil well tubing string
07/22/1986US4601333 Thermal slide joint
07/22/1986US4601100 For measuring a downhole characteristics in a well
07/16/1986EP0187628A2 Drill element for percussion drilling
07/15/1986US4600225 Tubular connection having a parallel chevron thread
07/15/1986US4600224 Tubular connection having a chevron wedge thread
07/15/1986US4600219 Corrosion-resistant pipe coupling structures
07/15/1986US4600063 Double-taper slip-on drill string stabilizer
07/15/1986US4600062 Shock absorbing drilling tool
07/15/1986US4600059 Line moving apparatus for wireline supported tools
07/15/1986US4600058 Equipment insert and method
07/15/1986US4600055 Tubular well tool receiving conduit
07/15/1986US4600037 Flexible drill pipe
07/15/1986CA1207658A1 Marine riser coupling assembly
07/15/1986CA1207657A1 Device for rapidly connecting rods, tubes and casings, particularly for offshore drilling
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