Patent ID: 8327934

Claim:
A casing annulus remediation system comprising: a hose; a spindle housing; an annular spindle coaxially coupled to an end of the hose and rotatably disposed within the spindle housing; a selectively openable nozzle affixed to an end of the hose distal from the annular spindle; a spool assembly engaging the hose that comprises coaxially disposed rollers each having an annular base and a flange projecting radially outward from a portion of each base to define a groove between the flanges and circumscribing a portion of each base and a selectively energizable piezoelectric member in contact with one of the rollers for inducing an acoustic signal in the hose; an acoustic signal sensor with the hose proximate the nozzle; and an analyzer for receiving signal data from the signal sensor and estimating a distance from the spool assembly to the nozzle.