Method and device for increasing safety during pipelaying

Details Method and device for increasing safety during pipelaying Method and device for increasing safety during pipelaying

2007-05-01

2007-05-01

Brinson, Patrick F. (Department: 3754)

Pipes and tubular conduits

With closures and plugs

Double end

C138S089000, C138S090000, C405S169000, C405S198000

Reexamination Certificate

active

10494727

ABSTRACT:
A method and device for preventing water from penetrating into the rising part/intermediate section (12) of a pipe (6) when laying the pipe (6) on or near the seabed (8) by means of a pipelay vessel (1), and where a plug (22) that seals against, travels and locks in the inside passage of the pipe (6) is arranged inside the pipe (6) between the lay vessel (1) and the seabed (8), where during normal pipelaying the plug (22) is displaced in the pipe (6) so as to essentially maintain its relative position relative to the pipelay vessel (1), and where in the event of water flowing into the pipe (6), the plug (22) is locked in the pipe (6), whereby water is prevented from filling the rising part/intermediate section (12) of the pipe (6).

REFERENCES:
patent: 3842612 (1974-10-01), Arnold
patent: 3890693 (1975-06-01), Eagleton et al.
patent: 3943982 (1976-03-01), Lecordier
patent: 3977201 (1976-08-01), Bittner
patent: 3978678 (1976-09-01), Duncan et al.
patent: 4098091 (1978-07-01), Desai et al.
patent: 4252465 (1981-02-01), Broussard et al.
patent: 4342519 (1982-08-01), Botrel et al.
patent: 4498811 (1985-02-01), Fern et al.
patent: 5029614 (1991-07-01), Lara et al.
patent: 2468827 (1981-05-01), None
patent: 2468827 (1981-05-01), None

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