VARIABLE ANNULAR VALVE NETWORK FOR WELL OPERATIONS

A method and system for creating a multi-gradient pressure regime within a wellbore annulus. A plurality of valve subs provided along a drill string with each sub including a port for selectively venting supply fluid from the drill string to the annulus. A valve is coupled to the port to control the supply fluid flow into the annulus. The valve has a stator fixed in relation to the valve sub housing. A rotor is in sealing contact with the stator, the rotor being rotatable with respect to the stator. The stator and rotor each have apertures formed therethrough, so that the rotor may be oriented between a fully shut position in which the stator and rotor apertures are not in alignment and a fully open position in which the stator and rotor apertures are in maximum alignment. The valve allows precise metering between the fully open and shut positions.