Patent ID: 6511261
Filing Date: 2003-01-28
Classification: B63B,E02B

Abstract:
A method for removing a structure which is attached to an underwater bed, using a hoisting vessel provided with a hoisting mechanism for hoisting up the structure, and a transport vessel for transporting the structure, the transport vessel being provided with attachment means for attaching the structure in a substantially vertical position to the transport vessel and with tilting means for tilting the structure between the substantially vertical position and a substantially horizontal position, wherein the hoisting vessel and the transport vessel are separate vessels, said method comprising the steps of:(i) detaching the structure from the underwater bed; (ii) connecting the structure to the hoisting mechanism; (iii) hoisting up the structure using the hoisting mechanism; (iv) attaching the structure to the transport vessel in such a manner that it can tilt about a horizontal axis; and (v) tilting the structure into a substantially horizontal position.