 Pumping is most routinely done to protect the well against scale and hydrates through the pumping of scale inhibitors and methanol.Pumping of kill weight brine may be done for the purposes of well kills and more exotic chemicals may be pumped from surface for cleaning the lower completion or stimulating the reservoir (though these types are jobs are more frequently done with coiled tubing for extra precision).Work involving wells is fraught with difficulties as there is often very little information about the real time condition of the completion.