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Submersible check valve can quickly control the wellhead during overflow or blowout, regulate the discharge of wellbore fluids, and promptly pump in kill fluid to restore pressure balance under stable bottom hole pressure conditions. Even in the event of blowout loss of control or fire accidents, it provides effective handling conditions.

The spherical check valve is a key fluid control tool in petroleum drilling and completion operations, mainly used to prevent backflow of drilling fluid or completion fluid, ensure well control safety, and avoid complex downhole situations.

The drill string float valve (flap type) is a key internal blowout prevention device used in drilling operations to prevent well kick and blowout. It is usually installed at the bottom end of the drill string (near the drill bit). Its core function is to maintain fluid pressure balance inside the drill string during drilling. When the drilling fluid circulates normally, the float valve is open to allow fluid flow; when abnormal downhole pressure occurs (such as a well kick), the float valve flap quickly closes to prevent high-pressure fluid from flowing upward.

The drill string float valve (arrow type) is a key internal blowout prevention device used in drilling engineering to prevent well kick and blowout. It is usually installed at the bottom end of the drill string (near the drill bit). Its core function is to maintain fluid pressure balance inside the drill string during drilling. When the drilling fluid circulates normally, the float valve is open to allow fluid flow; when abnormal downhole pressure occurs (such as a well kick), the float valve arrow core quickly closes to prevent high-pressure fluid from flowing upward.

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