Marine pipeline-installation tower and tensioning assembly

摘要

A marine pipeline-installation tower comprising at least two opposing legs, and one or more tensioning assemblies supported by the opposing legs for surrounding and supporting an intermediate pipeline during installation, at least one of the intermediate tensioning assemblies comprising two or more discrete segments, the segments being moveable between: a closed position wherein the segments are conjoined to form an enclosing pipeline annulus able to support the pipeline between the legs of the tower; and an open position wherein at least two of the segments are disconnected and separate. In this way, a better clearance is achievable between the parts of the segments able to form the enclosing pipeline annulus when the segments are in their open position, because the segments are able to be disconnected and separate despite still being supported within the limited room between the fixed legs of the tower.

主权项

1. A tensioning assembly comprising a plurality of discrete segments configured to surround and support a marine pipeline, and configured to permit the marine pipeline to pass therethrough during installation of the marine pipeline through a marine pipeline-installation tower that comprises at least two opposing legs that support the tensioning assembly,
the plurality discrete segments including a first segment and a second segment, wherein the first and the second segments are moveable between a closed position where the first and the second segments are conjoined to form an enclosing pipeline annulus able to support the marine pipeline between the at least two opposing legs of the marine pipeline-installation tower; and an open position where the first and the second segments are disconnected and separate, wherein at least one of the first segment and the second segment comprises two or more sections moveable relative to each other.