دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: It is a good dispersing agent used to avoid bit balling.

v: 1. to collect a mass of sticky consolidated material, usually drill cuttings, on drill pipe, drill collars, bits, and so forth. A bit with such material attached to it is called a balled-up bit. Balling up is frequently the result of inadequate pump pressure or insufficient drilling fluid. 2. in reference to an anchor, to fail to hold on a soft bottom, pulling out, instead, with a large ball of mud attached.

n: The phenomenon that drill bit or drill tool is surrounded by cutting and viscous mud in drilling progress.

n: The phenomenon that the cuttings accumulate in the wellbore because flushing cannt clean the wellbore timely in the drilling programe. It is one of the most important affecting factor of bit penetration.