Joint for oil-or gas-field pipe

Details Joint for oil-or gas-field pipe Joint for oil-or gas-field pipe

1987-01-21

1988-09-13

Arola, Dave W.

Pipe joints or couplings

With casing, lining or protector

Lined

285 94, 285333, 285916, 29458, F16L 914

Patent

active

047704446

ABSTRACT:
A gas- and oil-field pipe joint comprises a female part formed with a frustoconical internal thread and a male part formed with a complementary frustoconical external thread and screwable into the female part with both parts centered on a common axis. The female part further is formed centered on the axis with a frustoconical inner surface axially inward from the internal screwthread and with a frustoconical shoulder surface extending radially inward from the axially inner end of the inner surface. The male part is formed centered on the axis with a barrel portion having an ellipsoidal barrel surface engageable radially with the inner surface and with a frustoconical end surface engageable axially with the shoulder surface of the female part. The barrel portion is formed with a central frustoconical surface portion substantially complementary to the inner surface, and the end surface and the shoulder surface extend spacedly parallel to each other when the parts are threaded together with the frustoconical surface portion in contact with the inner surface but without substantial deformation of either of the parts.

REFERENCES:
patent: 2340706 (1944-02-01), Somer
patent: 2641488 (1953-06-01), Dunn et al.
patent: 3468563 (1969-09-01), Duret
patent: 4153283 (1979-05-01), Hellmund et al.
patent: 4527815 (1985-07-01), Frick
patent: 4550937 (1985-11-01), Duret
patent: 4623173 (1986-11-01), Honda et al.

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