Title:
CONCENTRIC CONDUIT TUBE INSULATED AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPS588632
Kind Code:
A
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.
Inventors:
SUTANREI OO HATSUCHISON
Application Number:
JP11141682A
Publication Date:
January 18, 1983
Filing Date:
June 28, 1982
Export Citation:
Assignee:
CHEVRON RES
International Classes:
B32B1/08; E21B36/00; F16L59/14; F16L59/147; F16L59/15; F16L59/21; (IPC1-7): B32B1/08; F16L59/14
Attorney, Agent or Firm:
Hideto Asamura
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