Blowout preventer ram lock

Valves and valve actuation – Blow-out preventers

Patent

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Details

92 17, 92 24, 92 27, E21B 3306

Patent

active

040762084

ABSTRACT:
A new and improved ram lock for blowout preventer rams which permits locking of the ram at multiple and adjustable positions to compensate for wear on sealing elements of blowout preventer rams and increase sealing action of the ram without requiring separate special control lines. Automatic locking of the ram at a desired position, such as in adjustable sealing positions to compensate for ram elastomer wear, is obtained.

REFERENCES:
patent: 2643642 (1953-06-01), Geyer
patent: 3104593 (1963-09-01), Clifton et al.
patent: 3208357 (1965-09-01), Allen et al.
patent: 3242826 (1966-03-01), Smith
patent: 3267818 (1966-08-01), Chambers
patent: 3353455 (1967-11-01), Berry
patent: 3738229 (1973-06-01), Kraft
patent: 3941141 (1976-03-01), Robert
patent: 3983792 (1976-10-01), Furtner
patent: 3994205 (1976-11-01), Ekdahl et al.

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