METHOD AND ASSOCIATED APPARATUS FOR ABANDONMENT AND RECOVERY AT SEA

摘要

The invention comprises a method for abandonment or recovery of a load at sea using vessel mounted pipeline laying apparatus. In the method rigid tubular members, such as drillpipe (301), adapted to be handled as portions of pipeline, are each erected from a substantially horizontal orientation to a substantially vertical orientation and joined to a previous tubular member thus forming a string (403). The load is then suspended from a lower end of said string during said abandonment or recovery, the string being' lowered into the sea as new tubular members are joined to reach a desired depth. The invention further comprises adapted pipelaying apparatus and adapted drillpipe for carrying out the method.