Shearing sealing ram

Wells – Means for perforating – weakening – bending or separating pipe...

Reexamination Certificate

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Details

C166S085400, C251S001100, C251S001300

Reexamination Certificate

active

11189165

ABSTRACT:
The present invention provides a method, apparatus, and system to shear a tubular member disposed in a well and seal the wellbore using a unique blade seal. In at least one embodiment, the blade seal is adapted to interface with opposing rams in a blowout preventer. The blade seal uses a combination of arcuate surfaces with a common centerpoint to interface with corresponding surfaces in a ram block of a ram. The blade seal retains sealing capabilities used for wells and at the same time reduces the forces on the ram body to reduce failures from overpressurization. Further, the blade seal can be used in existing blowout preventers bodies that heretofore have been overstressed by prior art designs.

REFERENCES:
patent: 3561526 (1971-02-01), Williams et al.
patent: 3946806 (1976-03-01), Meynier
patent: 4132265 (1979-01-01), Williams
patent: 4132266 (1979-01-01), Randall
patent: 4313496 (1982-02-01), Childs et al.
patent: 4341264 (1982-07-01), Cox et al.
patent: 4347898 (1982-09-01), Jones
patent: 4646825 (1987-03-01), Van Winkle
Cameron, Shear Ram Product Line, pp. 1, 3, and 5.

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