Conical thread form

Details Conical thread form Conical thread form

1988-07-05

1989-09-12

Reese, Randolph A.

Pipe joints or couplings

Particular interface

Tapered

285 36, 285333, 403343, F16L 1500

Patent

active

048653640

ABSTRACT:
A connector for connecting two pipes has threads configured to improve making up in severe motion conditions. The connector includes a pin and a box, each having frusto-conical surfaces with helical threads formed on them. The threads have multiple starts for rapid make up. The crest of each thread is truncated and is a frusto-conical surface. This frusto-conical surface is inverted to the frusto-conical surface of the portions of the pin and box that contain threads. Each thread has a load flank and a stabbing flank. The stabbing flank inclines and joins a link flank, which in turn joins a root. The link flank inclines at a different and steeper angle than the stabbing flank.

REFERENCES:
patent: 4295751 (1981-10-01), Holmberg
patent: 4410204 (1983-10-01), Reimert
patent: 4508375 (1985-04-01), Patterson et al.
patent: 4549754 (1985-10-01), Saunders et al.
patent: 4600225 (1986-07-01), Blose
patent: 4601491 (1986-07-01), Bell, Jr. et al.
patent: 4673201 (1987-06-01), Dearden et al.
patent: 4717183 (1988-01-01), Nobileau
"Vam", British Steel Corp. Tubes Division, Vam Catalogue 850 (Haynes Cannon Ltd., Wellingsborough) 1986.COPYRGT., pp. 4,14,16.
World Oil's 1986 Tubing Tables, .COPYRGT.1986, Gulf Publishing Co., pp. 37,41,45,46,48,50,55,56,58,61.

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