Inside blowout preventer

Any one of several types of valve installed in the drill stem to prevent a blowout through the stem. Flow is possible only downward, allowing mud to be pumped in but preventing any flow back up the stem. Also called an internal blowout preventer.

Input horsepower
18 July 2017
Instrumentation
18 July 2017
Input horsepower
18 July 2017
Instrumentation
18 July 2017