The working principle of the floating valve
When the drilling fluid is circulating positively, under the action of the drilling fluid, the valve plate (or valve cover) can overcome the resistance of the return spring, push the valve plate to rotate along the pin, the valve plate leaves the seat, the floating valve opens, and the whole channel in the drilling tool is unblocked. When the drilling fluid stops the positive circulation or occurs overflow or kick, under the action of the spring force and the pressure in the well, the valve plate will return close to the seat and the root, and the floating valve will close. To achieve the purpose of sealing the passage in the drill pipe.
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