In situ method and apparatus for inspecting and repairing subsea

Details In situ method and apparatus for inspecting and repairing subsea In situ method and apparatus for inspecting and repairing subsea

1981-04-24

1983-08-30

Novosad, Stephen J.

Wells

Processes

Assembling well part

166339, 166349, 166359, 166362, 166367, 285137A, E21B 1701, E21B 1702, E21B 4104

Patent

active

044011644

ABSTRACT:
A marine riser having a pair of hydraulic lines, such as choke and kill lines, secured thereto and substantially parallel to one another providing track means extending along substantially the full length of a multiple joint riser string for transporting a carriage along the riser from near the top to the bottom. The invention also includes a carriage adapted to travel along such track and also includes television camera and lights as well as manipulator means for performing various functions on a blow-out preventer stack and wellhead connector as well as associated equipment positioned at the lower end of the marine riser.

REFERENCES:
patent: 1474249 (1923-11-01), Ferrero
patent: 2803503 (1957-08-01), Borgman et al.
patent: 3256956 (1966-06-01), Puhringer
patent: 3324943 (1967-06-01), Price
patent: 3782458 (1974-01-01), Slack
patent: 3895677 (1975-07-01), Bokenkamp
patent: 3913668 (1975-10-01), Todd et al.
patent: 4047579 (1977-09-01), Wilckens et al.
patent: 4068737 (1978-01-01), Lenz
patent: 4119145 (1978-10-01), Tuson

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