Concentric walled conduit for a tubular conduit string

Details Concentric walled conduit for a tubular conduit string Concentric walled conduit for a tubular conduit string

1984-03-08

1986-01-28

Bryant, III, James E.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138109, 138173, 138DIG5, 285 47, F16L 918, F16L 5914

Patent

active

045664951

ABSTRACT:
A concentric walled conduit for incorporation within a tubular conduit string, and particularly for use in a subterranean well, is provided with one of the walls corrugated for substantially its entire length, preferably the inner tubular member. The annular space defined between the concentric tubular member contains a high heat resistant insulating material disposed around the outer surface of the inner tubular member. Each end of the annular space containing the insulating material is effectively sealed, and secured, such as by welds. The inner wall may be prestressed in tension for counteracting the forces which may be produced by a temperature differential between the tubular member walls of concentric conduit.

REFERENCES:
patent: 3574357 (1971-04-01), Tirgoviste et al.
patent: 3693665 (1972-09-01), Veerling et al.
patent: 4340245 (1982-07-01), Stalder
patent: 4415184 (1983-11-01), Stephenson et al.
patent: 4444420 (1984-09-01), McStravick et al.
patent: 4477106 (1984-10-01), Hutchison

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