Method and apparatus for making subsea pipe connections

Details Method and apparatus for making subsea pipe connections Method and apparatus for making subsea pipe connections

F - Mech Eng,Light,Heat,Weapons

16

L

61/5.9

F16L 37/00 (2006.01) E21B 43/01 (2006.01)

Patent

CA 1059328

ABSTRACT A subsea pipeline hub is connected to the hub of an adjacent spool piece connected to an in-place manifold of a subsea structure used in the production of oil and/or gas. The pipeline hub is positioned relative to the opposing spool hub and a remotely operated pipeline connecting tool is lowered from the water's surface to the subsea structure using guidelines and structural guidance for alignment of the pipeline hub with the spool piece hub. The spool piece hub is then drawn to the pipeline hub and the hubs are clamped together by operation of the connecting tool. The seal in the connection can be tested by means of the connecting tool. The spool piece may be retrieved and replaced by the connecting tool if maintenance is needed. Connecting tool operations are powered by hydraulic fluid and controlled from the surface. The pipeline hub may be lowered vertically and pivoted into its position adjacent the spool piece or may be pulled into that position.

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