ANCHOR-HANDLING SYSTEMS FOR OFFSHORE DRILLING RIGS
Most of the present-day mobile drilling rigs maintain position while drilling by means of anchoring or mooring systems using from eight to twelve lines of chain, wire rope, or a combination of both. The system must provide enough restoring force to deep the rig in position, even in the most adverse conditions, with a circle centered over the wellhead with a radius of 5 or 6% of the water depth. The theory of such mooring systems is briefly explained, wire-rope and chain systems are compared, and the 8-line moorings used for four semi-submersible drill rigs operating at a depth of 600 ft are compared in respect of their chain lengths and diameters.
- Find a library where document is available. Order URL: http://worldcat.org/oclc/1788841
Compass Publications Incorporated1117 North 19th Street, Suite 1000
Arlington, VA USA 22209
- Holder, F W
- Publication Date: 1977-4
- Pagination: 2 p.
- TRT Terms: Anchors (Mooring devices); Chains; Offshore drilling platforms; Offshore moorings; Wire rope
- Old TRIS Terms: Anchor chains; Anchor handling; Offshore mooring systems
- Subject Areas: Bridges and other structures; Marine Transportation;
- Accession Number: 00173666
- Record Type: Publication
- Source Agency: British Ship Research Association
- Files: TRIS
- Created Date: Apr 26 1978 12:00AM