During 1967-1970, Shell Oil Co. set 12 stationary platforms in the Gulf of Mexico. Water depths ranged from 236 ft to 373 ft. Because of attractive economics, the structures were cathodically protected with yard-installed impressed-current systems. Flush-mounted PbAg and PbPt high-output anodes (150 amp) were used. Eventually the systems failed. Reinstallation of cathodic protection for the deepwater structures became necessary. After study of several alternatives, the following conclusions and recommendations were reached: (1) Both impressed current and sacrificial-anode systems are technically feasible for cathodic protection of deepwater structures; (2) No significant difference in cost exists between the two systems for reinstallation in deepwater applications; and (3) The sacrificial-anode system is preferred over the impressed-current system for deepwater reinstallations due to the system's greater dependability.

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  • Corporate Authors:

    Petroleum Publishing Company

    211 South Cheyenne, P.O. Box 1260
    Tulsa, OK  United States  75221
  • Authors:
    • Bross, H E
    • Burgbacher, J Z
  • Publication Date: 0

Media Info

  • Features: References;
  • Serial:
    • Oil and Gas Journal
    • Volume: 74
    • Issue Number: 27
    • Publisher: PennWell Publishing Company
    • ISSN: 0030-1388

Subject/Index Terms

Filing Info

  • Accession Number: 00147812
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Feb 16 1977 12:00AM