SPECIAL MOORING SYSTEMS USING REMOTE CONTROLLED QUICK DISCONNECTS FOR BEAUFORT SEA DRILLING OPERATIONS

In the early 1970's InterOcean Systems, Inc. developed a remotely controlled rig anchor release (RAR) to provide an anchored drilling vessel with the ability to remotely (by sonar signals) and rapidly disconnect its anchors without cutting the anchor cables. This paper describes the special mooring systems utilizing the RAR for Beaufort Sea drilling operations. These systems have been utilized by Canadian Marine Drilling, Ltd., Beaufort Sea operations. Because of changing ice conditions which occur in the arctic, and because of the stringent Canadian government regulations, it was necessary and desirable for Dome Petroleum to provide special mooring systems on their drilling vessels which included an RAR on each mooring line. This system provides a rapid means of disconnecting in the event pack ice forces the drilling vessel off the well. Several mooring configurations were tried, modified, and simplified to improve their performance over the course of the four years (1976 through 1979) of actual field use. The paper describes the mooring systems, the RAR units, the installation, testing, recovey and re-installation techniques. The release units are equipped with a status monitoring system which is described together with the experience of its use with the mooring system. Economic and safety advantages are discussed. Future uses and potential value of the mooring systems are presented, with examples of applications in other areas.

Media Info

  • Pagination: p. 339-344

Subject/Index Terms

Filing Info

  • Accession Number: 00329930
  • Record Type: Publication
  • Report/Paper Numbers: Volume 4 Proceeding
  • Files: TRIS
  • Created Date: Apr 15 1981 12:00AM