A PIPELINE IS LAID ON A SUBMERGED BOTTOM
A pipeline is laid on a submerged bottom by (1) imparting a slight positive buoyancy to a relatively long pipe string to be laid, (2) floating it to the installation area, (3) elevating the free end of the submerged pipeline above the bottom, (4) sinking one end of the pipe string near the free end of the submerged pipeline, (5) joining the adjacent ends, and (6) imparting a negative buoyancy to the pipe string progressively from the joined end to the free end to return the pipeline to the bottom and sink the attached pipestring. Negative buoyancy may be imparted by controllably flooding the line.
- U.S. Patent Classification: C1.61/72.3.
Columbia Gas System Service CorporationColumbus, OH USA
- Teague Jr, W D
- Publication Date: 1969-11-25
- TRT Terms: Buoyancy; Construction; Pipe laying; Pipelines
- Candidate Terms: Pipe laying ships
- Old TRIS Terms: Pipeline buoyancy; Pipeline construction
- Subject Areas: Construction; Marine Transportation; Pipelines; Terminals and Facilities;
- Accession Number: 00056071
- Record Type: Publication
- Source Agency: American Petroleum Institute
- Report/Paper Numbers: Patent
- Files: TRIS
- Created Date: Jun 24 1974 12:00AM