Remotely replaceable guidepost method and apparatus

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

E - Fixed Constructions

21

B

166/51

E21B 17/01 (2006.01) E21B 7/12 (2006.01) E21B 43/01 (2006.01)

Patent

CA 1182040

ABSTRACT OF THE DISCLOSURE 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 replace- ment 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 find engage a retaining groove formed in the receptacle thereby firmly locking the new guidepost in place.

409467

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