دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

usually differential sticking (by overbalance),but may also include effect of friction and mud cake adhesion to the tubing or drill string.

n: A situation in which the drilling assembly (pipe, drill collars and bottomhole assembly) is stuck in filter cake that was previously deposited on a permeable zone. The pipe is held in the cake by a difference in pressures between the hydrostatic pressure