Title:
LOAD BALANCING FULL OPENING AND ROTATING BLOWOUT PREVENTER APPARATUS
United States Patent 3492007
Inventors:
Jones, Howard W.
Publication Date:
01/27/1970
Export Citation:
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Assignee:
REGAN FORGE & ENG CO
Primary Class:
277/325
Other Classes:
166/84.3
International Classes:
E21B33/08; E21B33/02; (IPC1-7): E21B33/08; F16J15/16
View Patent Images:
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US Patent References:
3387851Tandem stripper sealing apparatus
2846247Drilling head
2479265Fluid seal
2192805Casing head equipment for bore holes or wells
2176355N/A
0883155N/A




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