Caisson wellhead system

Details Caisson wellhead system Caisson wellhead system

E - Fixed Constructions

21

B

E21B 33/035 (2006.01) E21B 33/038 (2006.01) F16L 37/00 (2006.01)

Patent

CA 2267716

A caisson wellhead system having a weak point wherein the wellhead system may be installed in a well as a single unit. The caisson wellhead system of the invention includes a lower tubular member having an upper rim. A lower rim of an upper tubular member is placed on the upper end of the lower tubular member. A removable connector is installed inside of and between the lower tubular member and upper tubular member for temporarily connecting the upper tubular member and the lower tubular member. A weak point is formed at the interface between the lower tubular member and the upper tubular member when the removable connector is removed. Therefore, the caisson wellhead system will break at a controlled location if any external components of the well equipment are struck by a foreign object such as an iceberg.

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