An operator had been unsuccessful in previous attempts to fish an anchor and 300' of tubing from a depth of 7500', in an old well in Garvin County, Oklahoma, because of several deep casing leaks that had been acting as thief zones, preventing the circulation of fill-up out of the hole, A review of the casing inspection log led to the decision to spot two 25 bbl slugs of Leakblock-HD polymer over severe leaks noted at 5800' and 4200', respectively.

The polymer gels were spotted and bull head squeezed into the leaks, then allowed to set 2 hours. Although the operator previously had no returns to surface while attempting to wash-over the tubing, after the polymer squeeze, the well was reverse circulated with nearly full returns at the surface. The operator went on to fish the tubing & anchor out of the hole with no further problems. The well was re-completed and has been returned to production.