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Ram-type<br />
preventers<br />
Pipe rams are provided<br />
with semicircular<br />
openings which match<br />
the diameter of the pipe<br />
sizes for which they are<br />
designed.<br />
It is absolutely vital that the<br />
pipe rams in a preventer fit<br />
the drill pipe or tubing in the<br />
use, and all concerned must<br />
be certain in this regard at all<br />
times.<br />
If more than one size of drill<br />
pipe is in the hole, most<br />
operators require a second<br />
ram preventer in the stack.
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