Removable closure apparatus for hollow columnar members

Details Removable closure apparatus for hollow columnar members Removable closure apparatus for hollow columnar members

1977-08-08

1979-03-06

Shapiro, Jacob

Hydraulic and earth engineering

Marine structure or fabrication thereof

With anchoring of structure to marine floor

405227, 138 89, 277237R, E02B 1704

Patent

active

041423712

ABSTRACT:
A removable closure apparatus for tubular members of offshore platforms and the like utilizes a body inserted in the tubular member. A seal formed in an annulus between the inner surface of the tubular member and the outer surface of the body is bonded to each of the surfaces of the body and the tubular member. The seal is broken by use of a flexible tensile bearing inlay spirally embedded within the seal. The inlay is torn from the seal to destroy the structural integrity thereof and permit removal of the body. The inlay has one end affixed to the body and a second end extending upwardly through the member for manipulation from the upper end thereof. A force applied to the second end of the inlay causes it to tear the seal along a spiral path.

REFERENCES:
patent: 2760714 (1956-08-01), Rasmussen
patent: 3680689 (1972-08-01), Grundschober

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