Pipe joints or couplings – Particular interface – Tapered
Patent
1986-09-12
1988-09-13
Arola, Dave W.
Pipe joints or couplings
Particular interface
Tapered
285906, F16L 0000
Patent
active
047704489
ABSTRACT:
A pipe joint coupling member for deep well pipe strings has a female thread with a slightly longer pitch than the standard API thread of the pipe end. The differences in pitch is predetermined so as to equal the elastic elongation of the pipe end threads due to loading of the made up joints when suspended in a well. The coupling, in addition to having a slightly longer thread pitch may also have a different taper or tapers than that of the standard pipe end.
REFERENCES:
patent: 2239942 (1941-04-01), Stone et al.
patent: 3322446 (1967-05-01), Koziol et al.
patent: 4582348 (1986-04-01), Dearden et al.
patent: 4588213 (1986-05-01), Bollfrass
O'Dell William
Strickland Albert L.
Arola Dave W.
Kemon Solon B.
Landell International Company, Inc.
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