APPARATUS AND METHOD FOR WATER WELL CLEANING AND REHABILITATION

摘要

A method and apparatus for cleaning a down hole well is presented. The apparatus utilizes a tool body having a plurality of discharge nozzles for jetting streams of filtered water at pressures exceeding 15,000 psi (1034 Bar) perpendicular on to the inside wall surface of a casing across a zone of interest having slots or perforations. The nozzle streams are offset from the tool body imparting a rotational force. A rotary coupling is also utilized to limit the maximum rotation. The apparatus is lowered by a pre-determined length of coiled tubing to operational depth after which it is raised at a slow rate across the zone of interest.