Patent ID: 8689884

Claim:
A mud pulser tool to be positioned into a downhole environment, comprising: a housing; a control valve positioned in said housing that is selectively opened to allow a fluid to flow through the mud pulser tool or selectively closed to restrict the fluid flow, wherein the control valve is selectively opened or closed to produce a mud pulse signal transmitted through the fluid, said control valve comprising; an orifice positioned in said housing; and a poppet actuated linearly relative to said orifice, wherein a distance between said poppet and orifice is adjustable; a sensor system to measure a pressure drop across the control valve; and a control system coupled to said control valve, wherein said distance between said poppet and orifice is adjusted to achieve a desired differential pressure across said control valve, the mud pulser tool adjusts said distance between said poppet and orifice to produce a mud pulse signal with a selected pulse height, the mud pulser tool determines a depth at which the mud pulser tool is positioned within the downhole environment, and the selected pulse height is selected based on the depth.