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MODIFYING SEABED CONTOURS
In preparation for installing subsea infrastructure such as a pipeline, an adverse seabed contour is modified by dropping an elongate weight onto a seabed slope to penetrate the seabed. The weight is then lifted away from the slope, for example after being re-engaged with a supporting frame from which the weight was dropped. This leaves an elongate indentation at the drop location with a base less inclined than the previous inclination of the slope at that location. The indentation can be extended into a groove by repeatedly dropping the weight onto the seabed in longitudinal alignment to form a series of conjoined or overlapping indentations. The weight may be dropped at a sloped transition or shoulder between a depression in the seabed, such as an iceberg plough mark, and the general level of the seabed surrounding the depression.
MODIFYING SEABED CONTOURS
In preparation for installing subsea infrastructure such as a pipeline, an adverse seabed contour is modified by dropping an elongate weight onto a seabed slope to penetrate the seabed. The weight is then lifted away from the slope, for example after being re-engaged with a supporting frame from which the weight was dropped. This leaves an elongate indentation at the drop location with a base less inclined than the previous inclination of the slope at that location. The indentation can be extended into a groove by repeatedly dropping the weight onto the seabed in longitudinal alignment to form a series of conjoined or overlapping indentations. The weight may be dropped at a sloped transition or shoulder between a depression in the seabed, such as an iceberg plough mark, and the general level of the seabed surrounding the depression.
MODIFYING SEABED CONTOURS
MODIFICATION DES CONTOURS DU FOND MARIN
OLSEN CHRISTIAN LINDE (author)
2021-11-20
Patent
Electronic Resource
English
Wiley | 2014
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