Concentric tubing having bonded insulation within the annulus

Details Concentric tubing having bonded insulation within the annulus Concentric tubing having bonded insulation within the annulus

1981-06-29

1984-06-12

Bryant, III, James E.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138DIG1, 138DIG9, F16L 5914

Patent

active

044535708

ABSTRACT:
An insulated concentric tubing well element having an inner tubing and an outer tubing with a substantially solid insulating material in the annulus between the inner and outer tubing. A bonding material fills the voids in the annulus and the surface of the solid insulating material. The bonding material prevents movement within the annulus and seals the annulus. Calcium silicate is disclosed as a suitable material for the solid insulation and sodium silicate is disclosed as the bonding material. A method is disclosed for producing the complete well element.

REFERENCES:
patent: 1387348 (1921-08-01), Burgstresser
patent: 2756172 (1956-07-01), Kidd
patent: 2857931 (1958-10-01), Lawton
patent: 2906317 (1959-09-01), Keyes
patent: 3000433 (1961-09-01), Kemper
patent: 3058860 (1962-10-01), Rutter
patent: 4287245 (1981-09-01), Kikuchi

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