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Drilling choke system<br />
Hydraulically actuated drilling chokes are<br />
available in working pressures from 34,5 to 138<br />
MPa (5000 to 20000 psi).<br />
Inlet and outlet flange sizes from 77,8 to 103,2 mm.<br />
The standard size of orifice is 44,5 mm (1 ¾”).<br />
Working temperature is up to 121 °C.<br />
Hydraulic pressure of 2 MPa (300 psi) is applied to<br />
the actuator, which results in opening or closing the<br />
choke.
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