Conical thread configuration for rapid make-up connection

Details Conical thread configuration for rapid make-up connection Conical thread configuration for rapid make-up connection

1985-05-29

1988-01-05

Arola, Dave W.

Pipe joints or couplings

Particular interface

Tapered

285355, F16L 1702

Patent

active

047171839

ABSTRACT:
A conical thread configuration for providing a strong simple and rapid make-up connection of pin and box members particularly for connecting sections of pipes, casings and conductor pipes, anchoring pipes, wellheads and risers, particularly for offshore oil production. Each connecting member has a plurality (n) of thread lead entries on a frusto-conical surface, (n) being at least equal to two and at most equal to AD.times.p.times.1/6.25 in which AD is the average diameter of the frusto-conical surface bearing threads (in inches) and p is the number of threads per inch. The radial dimension of the engaged thread overlap after make-up is smaller than the variation VR of the radius of the frusto-conical surface on one thread pitch and larger than 1/2n of variation VR. Less than one turn is necessary for make-up or disconnection.

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patent: 3918823 (1975-11-01), Wilson
patent: 4043575 (1977-08-01), Roth
patent: 4410204 (1903-10-01), Reimert

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