A deep-sea mining system developed by Demag A.G. could be modified to dig trench for submarine piplines. The system for water depths to 16,000 ft comprises a crawler-mounted collector unit on the seabed, connected by a haulage pipe to a vertical capsule-shaped, 82 ft long intermediate-level pumping station set at a depth down to 1600 ft but maintained at 1 atm to facilitate servicing by men traveling via a tube from a surface vessel. Because of the hydrostatic difference in elevation, material collected off the sea bottom flows into the station without pumping; solids and water are separated in the intermediate station, and then pumped to a surface vessel or platform. The seabed unit consists of an undercarriage for the crawler drive and slewing drive, a pressure-tight slewable superstructure housing control instruments and lighting and television-camera equipment, and a 33-50 ft long cutter head boom. By slewing the superstructure from side to side, a strip about 65 ft wide can be mined or trenched.

  • Availability:
  • Corporate Authors:

    Petroleum Publishing Company

    211 South Cheyenne, P.O. Box 1260
    Tulsa, OK  United States  75221
  • Publication Date: 1972-7-17

Media Info

  • Pagination: p. 89
  • Serial:
    • Oil and Gas Journal
    • Volume: 70
    • Issue Number: 29
    • Publisher: PennWell Publishing Company
    • ISSN: 0030-1388

Subject/Index Terms

Filing Info

  • Accession Number: 00056112
  • Record Type: Publication
  • Source Agency: American Petroleum Institute
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM