DROP-IN CHECK VALVE
Drop-in check valve is a inside blowout control valve. It can also be used for cutting drill pipe on all kinds of offshore drilling floating equipment. It has a landing sub, which connect the needed position of drill string and put into the well, in order to check valve assembly in place.Drop-in check valve is a kind of check valve, and check valve store on the platform, when the blowout signal is found, drop it into drill pipe and pump down in place, When the high pressure flow upwelling, the check valve cuts off the high-pressure flow injected upward in the drill string, thereby achieving the purpose of blowout prevention.
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