In laying a submarine pipeline, the lengths of pipe are prepared onshore and sealed with plugs; they are then towed out to sea and placed end-to-end on the sea bed. The adjacent ends of each length of pipe are sealed in turn by welding in a surrounding chamber containing an inert gas at a pressure sufficient to support the hydrostatic pressure of the water. When the line is completed, the plugs are forced out through one end of the line by applying fluid pressure to the other end. Preferably, the chamber has an open bottom and is lowered to the sea bed before inert gas is pumped into it to displace water.

  • Corporate Authors:

    British Patent Office

    25 Southampton Buildings, Chancery Lane
    London WC2A 1AY,   England 
  • Authors:
    • Coultrup, J G
  • Publication Date: 1968-8-21

Subject/Index Terms

Filing Info

  • Accession Number: 00056056
  • Record Type: Publication
  • Source Agency: American Petroleum Institute
  • Report/Paper Numbers: Patent
  • Files: TRIS
  • Created Date: Jun 24 1974 12:00AM