Threaded joint for oil-well pipe

Details Threaded joint for oil-well pipe Threaded joint for oil-well pipe

1988-02-12

1989-05-16

Callaghan, Thomas F.

Pipe joints or couplings

Particular interface

Tapered

285355, F16L 1500

Patent

active

048304115

ABSTRACT:
A threaded joint for oil-well pipe comprises a box having an internal thread, a pin having an external thread, a metal-to-metal sealing contact provided at the unthreaded tips of the box and pin, and a film of grease applied on the surface of the internal and external threads. The cross-sectional area of a void containing the screw axis left between the meshed internal and external threads is at least 0.6 mm.sup.2 per pitch.

REFERENCES:
patent: 2062407 (1936-12-01), Eaton
patent: 2893759 (1959-07-01), Blose
patent: 2924876 (1960-02-01), Lewis
patent: 3069387 (1962-12-01), Allen et al.
patent: 3359013 (1967-12-01), Knox et al.
patent: 3468563 (1969-09-01), Duret
patent: 3989284 (1976-11-01), Blose
patent: 4508375 (1985-04-01), Patterson et al.
patent: 4624488 (1986-11-01), Furgerson

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