Pipe-laying vessel and method of laying a pipeline
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United States of America Patent
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May 8, 2018
Issued Date -
N/A
app pub date -
Jun 19, 2009
filing date -
Jun 20, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A pipe-laying vessel (1) is provided, including a tower (2) extending upwardly from the vessel, a pipe loading arm (9) for raising a length of pipe from the deck to a position aligned with the tower, a travelling clamp assembly (30) mounted for movement along the tower. The pipe-laying vessel may include a fixed clamp assembly (60) located in the region of a lower portion of the tower, wherein the travelling clamp assembly and/or the fixed clamp assembly includes both a friction clamp (34, 63) and a collar clamp (62), each of the friction clamp and the collar clamp being movable between an operative position, in which it is adjustable between a clamping and a released position, and an inoperative position. Alternatively or additionally the travelling clamp assembly (30) includes both a line-up clamp (33) and a pipeline tension bearing clamp (34). Alternatively or additionally there may be provided three or more line-up clamps (33, 35, 36) spaced along the tower for receiving the length of pipe from the loading arm.
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