دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Sticking that occurs when a portion of the drill string (usually the drill collars) becomes embedded in the filter cake resulting in a nonuniform distribution of pressure around the circumference of the pipe. The conditions essential for sticking require

n: In order to avoid pressure differential sticking,some evaluation tests emulating to prevent sticking with kinds of drill liquid and treating chemical made in the laboratory.

n: The limiting or prevention of motion of the drillstring by anything other than differential pressure sticking. Mechanical sticking can be caused by junk in the hole, wellbore geometry anomalies, cement, keyseats or a buildup of cuttings in the annulus.

n: a drill collar with a round cross section that has a long continuous groove or flute machined helically into its outer surface. The spiraled groove provides space between the wall of the hole and the body of the collar, minimizing the area of contact between the hole wall and the collar;thus the possibility of differential pressure sticking is reduced.

n: A kind of equipment that anticipating differential pressure sticking by detecting all kinds of drill fluid and their treating chemical.

n: A kind of ways be used to solve the differential pressure sticking,which use the u-tube principle to decline the fluid level of hole.