Although drilling vessels themselves, semi-submersibles and floating ship shapes, have reached a high degree of sophistication, it has only been in the past two or three years the industry has developed reliable, accurate and acceptable instrumentation to measure anchor line tension forces. Vital target of development is protection of vessel from the ever present hazard of breaking mooring lines and going adrift, from breaking off risers, drill pipe and sea floor connections, and never getting back into the original hole. Article describes the historical development of techniques for measuring the stresses in anchor-, cables and chains, and, particularly, the technique using a rotating and pivoting idler that is a basis for the friction-relieved measurizing system as installed on Sedco 135 F semi-submersible drilling rig.

  • Corporate Authors:

    Petroleum Engineer Publishing Company

    Box 1589
    Dallas, TX  United States  75221
  • Authors:
    • Stewart, V R
  • Publication Date: 1973-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00050170
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 14 1973 12:00AM