Fluid control valve

A fluid control valve for use in retaining well treatment fluids above a circulating valve and packer in a tool string. The fluid control valve comprises a ball seat with a seating surface thereon, a sealing ball for sealingly engaging the sealing surface, and a push rod. The ball seat and push rod are relatively movable so that as the packer is set and the circulating valve is moved toward a closed position, the push rod is brought into engagement with the ball so that it is moved off the ball seat, allowing fluid flow thereby. A ball cage extends from the ball seat for guiding the ball and limiting radial movement thereof when the circulating valve is open. A retrieving neck may be connected to the fluid control valve so that the fluid control valve may be retrieved while leaving the rest of the tool string in the well bore.