Liner connection

Details Liner connection Liner connection

1986-06-20

1987-11-17

Callaghan, Thomas F.

Pipe joints or couplings

Particular interface

Tapered

285334, 285355, F16L 1500

Patent

active

047070013

ABSTRACT:
A connection for plain end well liner pipe and the like uses a threaded pin and box having a locking reverse angle thread profile to prevent radial separation of the pin and box due to deep well pressure and make-up pressures. The connection includes a primary internal seal structure wherein a metal-to-metal interference seal is located adjacent a thermoplastic ring seal. Separation of the interference seal due to the proximity of the thermoplastic seal is prevented by the locking thread profile. An external seal uses a metal-to-metal interference seal enhanced by a locking torque shoulder seal which acts with the thread profile to prevent radial separation of the interference seal.

REFERENCES:
patent: 3355192 (1967-11-01), Kloesel, Jr. et al.
patent: 3359013 (1967-12-01), Knox et al.
patent: 3508771 (1970-04-01), Duret
patent: 3667784 (1972-06-01), Hokanson et al.
patent: 4489963 (1984-12-01), Raulins et al.
patent: 4494777 (1985-01-01), Duret
patent: 4564225 (1986-01-01), Taylor
patent: 4591195 (1986-05-01), Chelette et al.

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