دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The process in which the bit continually breaks the formation and deepend the wellbore. It is controled by the driller who operates the brake crank and set down the drilling string to keep definite weight on bit.

n: the actual drilling pressure of the downhole measured by the survey instrument

n: refer toweight on bit

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 to weight on bit

n: refer toweight on bit

n: 1. in mechanics, the weight or pressure placed on an object. The load on a bit refers to the amount of weight of the drill collars allowed to rest on the bit. See weight on bit. 2. in reference to engines. the amount of work that an engine is doing;for example, 50 percent load means that the engine is putting out 50 percent of the power that it is able to produce. 3. the amount of gas delivered or required at any specified point or points on a system;load originates primarily at the gas-consuming equipment of the customer. v:1. to engage an engine so that it works. Compare idle. 2. to set a governor to maintain a given pressure as the rate of gas flow through the governor varies. Compare demand.

the weight on bit that decided by structure of bit.

n: under any speed or tooth wear , the bit pressure gained under the condition of lowest drilling cost .

n: The weight on bit that causing bottom hole drill string destablizing and occuring primary bending.