دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a method of detennining optimum weight on bit and overall bit performance. A given amount of weight is put on the bit and the drawworks brake is tied off so that no more weight is applied to the bit as it drills. The time it takes for the bit to stop drilling ahead with the given amount of weight is measured. Different weights are applied and the times are compared to determine which amount is best.

n: a method of testing drilling to define the rotate speed and the
pressure under which the speed is the fast and the

n: refer todrill ahead

continue with drilling after stopping to check flow or other activity.

n: the operation during the drilling procedure when the cement is drilled out of the casing before further hole is made or completion is attempted.

n: The operation of drilling out of the casing shoe after the cementing of a casing or liner in place. Drilling out of the casing is done before further hole is made or completion attempted.


drilling out set or green cement from the casing before drilling ahead to make a deeper well.

leak off point. The departure from the straight line of a limit test on a wellbore. Usually from at leakoff test after casing is set and before drilling ahead.

n: the treatment and control of drilling fluid to ensure that it hasthe correct properties.this may include using additives,removing sand or other solids,adding water,and other measures.conditioning mayalso involve circulating the mud prior to drilling ahead

n: a notation of the amount of pressure generated on the drill stem when the mud pumps are run at a speed slower than the speed used when drilling ahead. A p-low or several p-lows are established for use when a kick is being circulated out of the wellbore. Also called kill rate pressure.

n: (RCP) the amount of pressure generated on the drill stem when the mud pumps are run at a speed (or speeds) slower than the speed used when drilling ahead. An RCP or several RCPs are established for use when a kick is being circulated out of the hole.

v: on a rotary rig, to rotate the drill stem clockwise. When drilling ahead, the expression on bottom and turning to the right" indicates that drilling is proceeding normally.

n: It means that the drill string is turning clockwisely in rotary drilling.