Variable position ram lock for blowout preventers

Details Variable position ram lock for blowout preventers Variable position ram lock for blowout preventers

1980-04-07

1981-12-15

Spiegel, H. Jay

Valves and valve actuation

Blow-out preventers

92 24, 92 27, E21B 3312

Patent

active

043055656

ABSTRACT:
A new and improved ram lock and blowout preventer are provided for locking a blowout preventer ram in any of a number of variable, adjustable sealing positions in a bore in the preventer. A ram carrier is mounted in a housing to move the ram to and from the sealing positions. The housing is provided with a tapered inner surface which selectively engages locking wedge members mounted with the ram carrier. A locking cone mounted with the ram carrier responds to fluid pressure during movement of the ram carrier to move the locking wedges into engagement with the tapered inner surface for locking purposes.

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patent: 3561526 (1971-02-01), Williams, Jr. et al.
patent: 3918346 (1975-11-01), Ziegler
patent: 3941141 (1976-03-01), Robert
patent: 3983792 (1976-10-01), Furtner

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