System for subsea cable installation

摘要

The present invention relates to a system for subsea installation of elongate flexible element, comprising a container for allocating/storing/accommodating an elongate flexible element intended to be installed, said container being positioned on a trenching vehicle arranged to trench said elongate flexible element into the seabed, which container comprises a guide system arranged to control the release of the flexible element, and which trenching vehicle is further linked to a surface vessel via an umbilical cable whereby said vehicle is remotely operable subsea from said surface vessel wherein said guide system comprises a coiling arrangement for keeping the elongate flexible element in a defined coiled configuration inside said container.

主权项

1. A method for underwater installation of a seismic cable having a plurality of integrated seismic sensors into the seabed, comprising the steps of:
a. providing an underwater trenching vehicle for trenching the seismic cable a plurality of seismic sensors integrated with a cable into the seabed; b. providing a container for accommodating the seismic cable which container comprises a guide system arranged to control the release of the seismic cable from the container, the seismic cable being horizontally coiled within the container; c. removably mounting the container upon said trenching vehicle; d. linking the trenching vehicle to a surface vessel via an umbilical cable whereby the trenching vehicle is remotely operable subsea from said surface vessel; e. transferring the trenching vehicle and the thereupon arranged container from the vessel to the seabed; f. providing said guide system with a coiling arrangement comprising a plurality of retaining details for keeping the seismic cable in the horizontal coiled configuration inside said container; g. deploying the seismic cable from the coiling arrangement within the container by using the guide system to pull the seismic cable from the container and through a top of the container so that the cable uncoils from within the container while the container remains stationary in relation to the trenching vehicle; and h. using the trenching vehicle to permanently trench and install the seismic cable into the seabed.