E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/68
E21B 17/18 (2006.01)
Patent
CA 1182394
HIGH TEMPERATURE INSULATED CASING ABSTRACT OF THE DISCLOSURE An insulated casing assembly for use in injecting steam into wells or transmitting steam from the generating source to the wellhead is disclosed. A plurality of interconnected casings are used, each casing having outer and inner tubular sections and an annular spacing between the two sections containing either multilayered thermal insulation or glass microspheres, enveloped in a low conductivity gas. Rigid thrust rings connect and prevent relative movement between the corresponding ends of the two sections. A pressure sealing ring disposed between adjacent inner tubular sections prevents ingrees of steam into the coupling cavity. An insulation assembly between adjacent casings includes coupling cavity insulation fitted tightly over the thrust rings and a gap insultating ring disposed between adjacent outer tubular sections. A threaded coupling screwed onto threaded ends of outer tubular sections of adjacent casing joins them.
409863
Brown Victor R.r.
Stephenson Edgar O.
Eckersley Raymond A.
Tube-Alloy Corporation
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