Insulated casing assembly

Details Insulated casing assembly Insulated casing assembly

E - Fixed Constructions

21

B

166/68

E21B 17/14 (2006.01) F16L 59/18 (2006.01) F16L 59/21 (2006.01)

Patent

CA 1151540

39-TS-2604 ABSTRACT OF THE DISCLOSURE An insulated casing assembly for use in injecting steam into wells, comprising a plurality of interconnected casings, each casing having outer and inner tubular sections, an annular spacing between the two sections containing multilayered thermal insulation enveloped in a low conductivity gas, and tubular bellows connecting an allowing relative movement between the corresponding ends of the two inner sections. A leak-proof connection between adjacent casings in- cludes a diffuser sleeve fitted tightly over the ends of adjacent inner tubular sections, a filler ring fitted on the diffuser sleeve and disposed between adjacent outer tubular sections, and a threaded coupling screwed onto threaded ends of outer tubular sections of adjacent casings.

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