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