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US 6,682,101 B2Granted
Wedgethread pipe connection
AssigneeBeverly Watts Ramos
InventorJohn Dawson Watts
Life of this patent
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AssigneeBeverly Watts Ramos
InventorJohn Dawson Watts
Estimating the term…
A high strength Wedgethread Pipe Connection having a ratio of the radius change per turn to the thread width change per turn, as is required to maintain both a thread seal and tightness, even when the connection is subjected to transient service loads such as vibrations, shock, bending, tension, compression, torsion and/or thermal changes. The thread form may be Open or Trapped for use on large or small diameter pipe, configured such as: a flush joint; with collars of larger diameter than the pipe; with double-pin couplings; tool and accessory connections; or it may also be used to reversibly connect such as solid structural posts to base members where a wide range of repeatable makeup torque is desired. The threads have provisions for ease of manufacture and assembly, and to minimize handling damage. The connection has a very high torque capacity without need for shoulders, and it can be repeatedly “spun-up” and tightened over a wide torque range, without significant change in the final makeup position. The connection has a very high tension, compression and bending strength, relative to the pipe. The connection may be furnished in high strength configurations such as integral flush joints, near-flush, box couplings, double pin couplings, and even as structural post connections. Thread dope requirements for use with a given connection are included.
A threaded pipe connection for assembly with the use of thread dope, having a box (2) and pin (1) formed with tapered mating wedgethreads, the box threads having crests (21), roots (8), stab flanks (4) and load flanks (6), the pin threads having crests (7), roots (20), stab flanks (3) and load flanks (5), an included angle (35) measured in the gap between the flanks, the threads having a first axial crest width as at (17) and a second axial crest width as at (54), the first and second crest widths being positioned one thread turn apart, first crest width (17) being dimensioned with first radius (18) and second crest width (54) being dimensioned with second radius (55), comprising:
A thread dope composed of a grease-like material mixed with solid particles sufficient to seal and lubricate between given mating pipe threads, comprising:
A threaded connection for assembly with the use of thread dope, having a box (2) and pin (1) formed with tapered mating wedgethreads, the box threads having crests (21), roots (8), stab flanks (4) and load flanks (6), the pin threads having crests (7), roots (20), stab flanks (3) and load flanks (5), and included angle (35) measured in the gap between the flanks, the threads having a first crest width as at (17) and a second crest width as at (54), the crest widths being positioned one thread turn apart, first crest width (17) being dimensioned with first radius (18), and second crest width (54) being dimensioned with second radius (55), comprising:
Dependencies are inferred from the claim text.