образование заколонных перетоков; заколонные перетоки(Remedial squeeze work on questionable cement jobs usually try the best ingenuity that can be mustered. Perhaps a more common problem is a channel job caused by an incomplete sheath around the pipe leaving a channel of completion fluid along the casing. This channel may be relatively short or run the complete height of cement. The problem is normally noted when the casing is perforated for production and the zone starts making completion fluid or water not identified with the zone of interest. slb.com)
