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: in order to use complex drilling arithmetic formula ,some constants in the formula should be measured in advance ,and five-spot drilling test is one of methods to realize this target