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Parveen non-return type inside Blow Out Preventor is suitable for use on Drill Pipe which has spring loaded type valve & seat mechanism
to shut off the pressure from drill string. During normal operation it
allow downward flow of circulation material coming thru mud pump,
stand pipe, rotary swivel & drilling hose but prevent upward
flow when circulation stops. When back flow occurs valve closes
automatically & stabbing to its position and thus not only
protects mud pump, stand pipe, rotary swivel, drilling hose from
damage but also prevents blow out.
Parveen B.O.P also have the mechanisms to hold the valve in open condition against the well pressure with the help of hold down bar or release rod and release handle - release pin / stud mechanism. For proper standing B.O.P base-stand can also be provided.
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