Thread form for pipe joints

Details Thread form for pipe joints Thread form for pipe joints

1975-09-19

1977-01-25

Callaghan, Thomas F.

Pipe joints or couplings

Particular interface

Tapered

285417, F16L 1500

Patent

active

040048322

ABSTRACT:
The tensile and compressive strength characteristics of pipe joints, particularly those adapted for use in oil well casings, are improved by a novel thread configuration on the mating pipe and coupling members. The threads are symmetrical, round threads having relatively large radius crests and roots. They include flank portions between the respective crests and roots disposed on angles not greater than angles of repose of the joint materials.
Pipe joints employing the described thread configuration are easier to fabricate and are capable of more rapid make-up while the danger of cross-threading and jamming is minimized.

REFERENCES:
patent: 2051499 (1936-08-01), Siegle
patent: 2094491 (1937-09-01), Janata
patent: 2909380 (1959-10-01), Hoye et al.
patent: 3258284 (1966-06-01), Phipps

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