Split non-welded casing cap for high temperature service

Details Split non-welded casing cap for high temperature service Split non-welded casing cap for high temperature service

E - Fixed Constructions

21

B

E21B 33/04 (2006.01)

Patent

CA 2657298

A casing cap to seal the annulus formed between an upper end of an outer casing and an inner casing extending through and above the outer casing. An annular casing cap housing is formed in split portions which when joined at their splits form the casing cap housing to cover and seal the annulus. The joined casing cap split portions form a side wall which surrounds the outer casing, and which has upper and lower ends. The upper end forms an annular top section adapted to rest on the upper end of the outer casing, cover the annulus and form an upper annular seal to the inner casing. The lower end is adapted to form a mechanical connection, preferably non- welded, to the outer casing and to form an annular seal to the outer casing. Each casing cap split portion forms a sealing surface at each split for sealing together around a sealing element such as epoxy, graphite or elastomer seals. Connectors between the casing cap split portions clamp together the sealing surfaces of the casing cap split portions with the sealing element to form pressure-containing, non-welded seals.

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