| Customization: | Available |
|---|---|
| After-sales Service: | Yes |
| Warranty: | Yes |
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Drop-in check valve ,API 7-1
Drop-in check valve prevent return flow druing a kik and are suitable fro most driling situation in which return flow through the drill string is a risk and normal operation requires the benefits of a ful bore sub .by preventing upward flow through the drill pipe and allowing a fluid to be pumped downward to circulate the well.the valves provide the driller with the means to control the drill pipe pressure when required ,significantly iproving and simplifying well control .the drop in check vavle is consisting of landing sub and check valve assembly .Normally the landing sub is not used but only regarded as a sub on the drill string .the landing sub is threaded tightly with stop ring and connected with drill stem and put into downhole .when high pressure fluid happened or already happened ,the check valve is put into used to stop blowout in the drilling .
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