Patent ID: 8205669

Claim:
A subterranean completion assembly extending from a surface, comprising: a screen assembly supported by a packer; an inner string assembly extending through said packer and further comprising a setting tool for said packer and a crossover tool; said inner string assembly movable into a plurality of positions with respect to said packer when said packer is set, one of said positions for use of said crossover to deliver gravel to a lower annulus outside said screens while taking returns to an upper annulus around said inner string assembly and above said packer; at least one inner string assembly sensor disposed in said upper annulus adjacent said packer and communicating to the surface at least one signal indicative of relative movement of said inner string assembly with respect to said set packer in real time; said inner string assembly sensor comprises an inner string assembly fiber optic cable mounted above said packer; said inner string assembly fiber optic cable is wound on said inner string assembly and is secured to it so that relative movement, of said inner string assembly with respect to said packer, creates stress that is sensed in said inner string assembly fiber optic cable and communicated to the surface.