Title:
Blowout preventer
United States Patent 2912214


Inventors:
Herbert, Allen
WORKS MADDEN T
Oliver, John P.
Application Number:
US41311454A
Publication Date:
11/10/1959
Filing Date:
03/01/1954
Assignee:
CAMERON IRON WORKS INC
Primary Class:
Other Classes:
251/31, 277/325
International Classes:
E21B33/06
View Patent Images:
US Patent References:
2749078Well blowout preventer1956-06-05
2650609Hydraulic valve1953-09-01
2593740Valve sealing assembly1952-04-22
2444595Washer assembly unit1948-07-06
2427073Side packing floating ram gate1947-09-09
2420849Valve1947-05-20
2387106Blowout preventer1945-10-16
2278050Well head closure1942-03-31
2237709Blowout preventer1941-04-08
2194259High pressure multiple plate packing1940-03-19
1611844Gate valve1926-12-21