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    INSIDE BOP VALVE

    　　Inside BOP Valve is a kind of check valve with large pressure drop, tapered plug of valve, reduces cutting action of the mud on the seat, to ensure that the correct closed position. Inside BOP Valve connected with drill string can protect swivel, hose and stand pipe. It also can be used before high pressure pump, prevent high pressure blowout. A dedicated release tool keeps the valve normally open and allows reverse flow to pass. This dedicated release tool pre-installed in the valve and the assembly prepared on the drilling platform, for quick installed on the drill stringwhen the first signalappears from the well.

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    FPJ INSIDE BOP VALVE

    　　FPJ inside BOP Valve is a kind of check valve with large pressure drop，Valve seal is arrow type valve seal，the arrow type check valve will shut down rapidly under the action of reverse circulation pressure inside drill tools and spring force, cut off the inner channel of drilling tools, to prevent blowout purpose in the drilling tools. Itcan be placed on the platform for standby, or it can be installed between the drill pipe and drill bit after removing the jacking device to prevent high-pressure oil and gas eject from the drilling tool. A dedicated release tool keeps the valve normally open and allows reverse flow to pass. This dedicated release tool pre-installed in the valve and the assembly prepared on the drilling platform, for quick installed on the drill string when the first signal appears when drill pipe lifts out from the well.

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    ARROW TYPE CHECK VALVE

    　　Arrow type check valve (drilling tool check valve) is a kind of important inside blowout tool, usually used in the oil and gas drilling and workover operation. It works with drilling toolsenter into the well, during the process of drilling and workover in case of overflow, well kick, or positive circulation stops, the arrow type check valve will shut down rapidly under the action of reverse circulation pressure inside drill tools and spring force, cut off the inner channel of drilling tools, to prevent blowout purpose in the drilling tools.

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    RETRIEVABLE DROP-IN CHECK VALVE

    　　Retrievable drop-in check valve is an inside blowout control valve. 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.

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    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.

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    PLATE CHECK VALVE

    　　Plate check valve is an important blowout control tool. Compared with other structure back pressure valve, it has the advantages of high strength, large flow area, high temperatureresistance,high pressure resistance, drilling fluid erosion resistance and easy maintenance, etc.

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