Gas tightly sealed joint in oil field tubular goods

Details Gas tightly sealed joint in oil field tubular goods Gas tightly sealed joint in oil field tubular goods

1983-01-31

1986-06-17

Scanlan, Jr., Richard J.

Pipe joints or couplings

Particular interface

Tapered

285355, 2853322, F16L 2500

Patent

active

045952191

ABSTRACT:
A pin member with conical thread is threaded into a box or sleeve member having matching conical threading with abutment of the end of the box or sleeve against a shoulder on the pin member; that shoulder is continued into a groove in the pin member receiving a conically distorted polytetrafluoroethylene ring sealingly cooperating with a frustoconical surface of the box or sleeve member near its abutment end. The ring has been placed into the groove after having been heated to a temperature above the crystalline/amorphous transition temperature but below the liquification and decomposition temperatures.

REFERENCES:
patent: 2104799 (1938-01-01), Evans
patent: 2110825 (1938-03-01), Archer
patent: 3508771 (1970-04-01), Duret
patent: 4085951 (1978-04-01), Morris
patent: 4253687 (1981-03-01), Maples

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