LOAD BALANCING FULL OPENING AND ROTATING BLOWOUT PREVENTER APPARATUS
United States Patent 3492007
US Patent References:
/0883155.html
- - 0883155
/2176355.html
- - 2176355
Casing head equipment for bore holes or wells
- - 2192805
Fluid seal
- - 2479265
Drilling head
- - 2846247
/0883155.html
- - 0883155
/2176355.html
- - 2176355
Casing head equipment for bore holes or wells
- - 2192805
Fluid seal
- - 2479265
Drilling head
- - 2846247
Inventors:
Jones, Howard W.
Publication Date:
01/27/1970
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Export Citation:
Assignee:
REGAN FORGE & ENG CO
Primary Class:
Other Classes:
166/84.300
International Classes:
E21B33/08; E21B33/02; E21B33/08; F16J15/16
US Patent References:
| 3387851 | Tandem stripper sealing apparatus |