Insulating tubular conduit

Details Insulating tubular conduit Insulating tubular conduit

1982-07-19

1985-07-02

Scanlan, Jr., Richard J.

Pipe joints or couplings

With casing, lining or protector

Insulated

285133R, 285138, 285333, 285286, 285397, F16L 5914

Patent

active

045264082

ABSTRACT:
A concentric insulating tubular conduit member for use in forming a conduit string such as a tubing string in a subterranean oil or gas well, is disclosed. Each individual conduit comprises concentric inner and outer members rigidly attached at each end. Both the inner and outer tubular members are welded to an intermediate bushing. At least one of the inner and outer members is upset to prevent weakening of the tubular joint at the welded connection. Adjacent tubular conduits can be interconnected by couplings having an outer surface flush with the outer periphery of the two interconnected joints.

REFERENCES:
patent: 1349518 (1920-08-01), Lyle
patent: 1731171 (1929-10-01), Miller
patent: 3511282 (1970-05-01), Willhite et al.
patent: 3574357 (1971-04-01), Alexandru
patent: 3680631 (1972-08-01), Allen et al.
patent: 3794358 (1974-02-01), Allen et al.
patent: 4396211 (1983-08-01), McStravick et al.

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