Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Reexamination Certificate
2007-03-27
2007-03-27
Keasel, Eric (Department: 3753)
Valves and valve actuation
Blow-out preventers
Radial reciprocating ram
C251S284000
Reexamination Certificate
active
11048096
ABSTRACT:
A blowout preventer having a main body, a ram system with ram apparatus, a movement system with movable shaft apparatus connected to the ram apparatus, the ram apparatus movable from a first open-ram position to a second closed-ram position, the movable shaft apparatus including a locking shaft portion having a tapered portion, a locking system for selectively locking the ram apparatus in the closed position and having locking member apparatus having a primary tapered surface in contact with the locking shaft portion which is movable with the so that the primary tapered surface contacts the tapered portion of the locking shaft portion to releasably lock the movable shaft apparatus.
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Land and Marine Drilling. U Blowout Preventer Wedgelocks. Cameron Iron Works. 1 p. & Cover Page. May 1982.
Ultralock II Automatic Locking System. Shaffer A Varco Company, 2 pp., 2002.
Keasel Eric
McClung Guy
Rost Andrew J.
Varco I/P Inc.
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