1976-12-14
1977-08-23
Shapiro, Jacob
214 1P, F16L 100
Patent
active
RE0293644
ABSTRACT:
A method of laying pipe on the floor of a body of water to form a pipeline in which the pipe section to be joined is at all times securely and stably supported by a mobile frame such that, during alignment and engagement, the pipe is substantially free from the influence of wave and current action. A pipe section is first releasably attached to a mobile frame, then lowered to the floor where it is placed in a stable-fixed position on the floor generally aligned with but spaced from the end of the previously laid pipe. The end is then aligned with the pipeline by lateral and/or tilting movement of the frame, and then moved axially into engagement with the end of the pipeline. The alignment and engagement procedures may be observed, directed and/or controlled from a region at atmospheric pressure. The method may also include holding the engaged pipe section in a stable position while placing ballast material thereunder. After engagement, the frame is released from the section and returned to the surface.
REFERENCES:
patent: 436914 (1890-09-01), Fischer
patent: 1874081 (1932-08-01), Burrows
patent: 2333208 (1943-11-01), Spear
patent: 2830548 (1958-04-01), McElvany
patent: 3012406 (1961-12-01), Lassen-Nielsen
patent: 3014984 (1961-12-01), Jacobson
patent: 3099913 (1963-08-01), Melton et al.
Giant Pipe-Layer, Popular Science, Aug. 1959, pp. 95-98.
Western Construction, May 1963, pp. 74, 78, 79, 80.
Engr. News-Record, May 17, 1951, p. 52.
Shapiro Jacob
Underwater Devices, Inc.
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