Under ice pipelaying

Details Under ice pipelaying Under ice pipelaying

1977-09-08

1978-12-12

Stein, Mervin

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Submerging, raising, or manipulating line of pipe or cable...

F16L 104

Patent

active

041290119

ABSTRACT:
A method of laying an underwater pipe line under an ice sheet. The pipe is fabricated on shore at a make-up point and a plurality of support stations are spaced apart along the pipe path. Holes are bored in the ice at the support stations and low friction pipe support cradles are lowered underwater at the stations and anchored to the ice sheet. A trench is then cut in the ice and the pipe string is introduced into the water and towed across beneath the ice surface through the support cradles by means of pulling winches at a winching station or stations. As the leading end of the pipe being towed under the ice passes each support station the pipe support cradles are tightened so as to support the pipe string from the ice sheet and immediately beneath it. After the pipe has been towed to the opposite shore, the pipe is lowered to the water bottom by attaching a train of lowering winches to the pipe through the trench. Each of the lowering winches take up the support of the pipe and lowers it in turn to the water bottom as corresponding support cradles are released, one after the other.

REFERENCES:
patent: 3559413 (1971-02-01), Silverman
patent: 3600898 (1971-08-01), Godfrey et al.
patent: 3950955 (1976-04-01), Meeres

Affiliated with

Also associated with

Rating

Under ice pipelaying does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Under ice pipelaying, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Under ice pipelaying will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-826671