Remotely replaceable guidepost method and apparatus

Details Remotely replaceable guidepost method and apparatus Remotely replaceable guidepost method and apparatus

1984-04-13

1985-06-18

Callaghan, Thomas F.

Hydraulic and earth engineering

Marine structure or fabrication thereof

405169, 166340, 175 7, E02D 2900, E21B 7128, E21B 43013, E16L 104

Patent

active

045238782

ABSTRACT:
A method and apparatus for remotely replacing damaged guideposts attached to a subsea structure are provided. A receptacle is permanently attached to the subsea structure. The guidepost is inserted into the receptacle and is releasably connected thereto by one or more radially-oriented, spring loaded lock pins. Damaged guideposts are removed by applying an upward vertical force to the guidepost sufficient to shear the lock pin or lock pins. The upward vertical force is applied by a replacement tool capable of being remotely operated from the surface of the body of water. Following removal of the damaged guidepost, a new guidepost is inserted into the receptacle. Lock pins mounted in the new guidepost retract into the guidepost as it is being inserted. When fully inserted, the lock pins extend and engage a retaining groove formed in the receptacle thereby firmly locking the new guidepost in place.

REFERENCES:
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patent: 4347012 (1982-08-01), Glidden
patent: 4439068 (1984-03-01), Pokladnik

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