Submarine pipeline laying vessel
US3982402A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1975 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | May 5, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L1/203
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention relates to a method and to an apparatus for use in laying a submarine pipeline from a pipe-laying vessel. According to one aspect of the present invention, there is provided a reel pipe-laying method for continuously laying a pipeline of up to 24-inch diameter without a stinger by (1) aligning a pipe portion as it is being paid out from the reel, (2) straightening the aligned pipe portion, (3) tensioning the pipe, (4) discharging the straightened pipe under tension into the body of water, and (5) changing for different water depths and pipe conditions the lift off angle of the pipe relative to the horizontal by pivoting a diverter about a horizontal pivot, the diverter supporting at least the straightener and the tensioner and extending from the horizontal pivot mounted near the aft end of the vessel, upwardly toward the reel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.