Methods for towing a SCR and a pipeline along the sea bed, to install a pipeline to deep waters in an anchoring device at the bottom of the sea, towing and launching of a submerged bottom tube upward and to recover an ascending tube

摘要

Methods for towing a SCR and a pipeline along the sea bed, to install a pipeline to deep waters in an anchoring device at the bottom of the sea, towing and launching of a submerged bottom tube upward and to recover an ascending tube.A deep water pipeline is towed to a predetermined position by a method for towing of the fund, with a front end of the pipeline attached to a boat trailer and the rear end of the pipeline is fixed to a rear vessel.The rear end is supported near the sea bed using the vessel back, while the pipeline is dragged along the seabed.A carriage speed is established and an angle of inclination to the front end is maintained by elevating and lowering is the rear end to control the length of the pipeline dragged along the seabed and, thus, the degree of drag applied by the sea bed to the pipeline.In a method for towing and launching of a submerged bottom tuboascendente having a front end and a rear end, the tube is pulled upward by method of towing of background in a first speed until the rear end of the tube upward rise out of the law. To the sea, after which the speed is increased.