Method for retrieving a pipeline
OwnerDarren O'LEARYinventor
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Abstract
A method for retrieving a pipeline from a seabed in the body of water to a vessel includes the steps of suspending at least a portion of the pipeline in the body of water between the seabed and the vessel, plastically deforming the portion of the pipeline to form a plastically deformed portion, and retrieving the plastically deformed portion to the vessel.
Claims36
A method for retrieving a pipeline from a seabed in a body of water to a vessel, the method comprising:
- (a) suspending at least a portion of the pipeline in the body of water between the seabed and the vessel;
- (b) plastically deforming the portion of the pipeline to form a plastically deformed portion;
- and
- (c) retrieving the plastically deformed portion onto the vessel.
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The method according to 27, the method further comprising:
- in response to an insufficient friction at the seabed to control the plastic deformation of the pipeline applying a third longitudinal tension to a distal end of the pipeline;
- wherein the distal end is an opposite end of the one end of the pipeline connected to the vessel;
- and
- wherein the third longitudinal tension is applied by a second vessel connected to the distal end of the pipeline.
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A system for managing a plastically deformed pipeline that has been retrieved from a body of water, the system comprising
- a means for straightening the plastically deformed pipeline to form a straightened pipeline, and
- a means for applying a longitudinal tension to the straightened pipeline;
- wherein the means for straightening is arranged in-line with and before the means for applying.
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Dependencies are inferred from the claim text.