Reduced J tube pull force

Details Reduced J tube pull force Reduced J tube pull force

1986-05-27

1987-08-25

Taylor, Dennis L.

Hydraulic and earth engineering

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

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

72166, 166343, 166367, 405195, 405169, F16L 104

Patent

active

046889663

ABSTRACT:
A method and apparatus are provided for reducing the force required to move a pipe through a J-tube riser attached to an offshore platform. The J-tube riser is provided with at least one movable section and the movable section is oscillated as the pipe is moved through the J-tube riser, thereby reducing the force required to move the pipe.

REFERENCES:
patent: 1515894 (1924-11-01), Taylor
patent: 3293897 (1966-12-01), Holter
patent: 3434296 (1969-03-01), Otterman et al.
patent: 3595312 (1971-07-01), Matthews
patent: 3650114 (1972-03-01), Neal
patent: 3680342 (1972-08-01), Mott et al.
patent: 3955599 (1976-05-01), Walker
patent: 4095437 (1978-06-01), Cox
patent: 4098091 (1978-07-01), Desai et al.
patent: 4403890 (1983-09-01), Miyanagi et al.

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