دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a type of drill collar with big and heavy circular weighting block to increase the drilling pressure

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

n: refer to weight on bit

n: a drilling method when the bit starts drilling the layer,by doing this ,the drilling pressure and rotate speed can be increased gradually so as to get the optimum drilling situation and avoid the tooth of the bit being damaged

n: a drilling method when the bit starts drilling the layer,by doing this ,the drilling pressure and rotate speed can be increased gradually so as to get the optimum drilling situation and avoid the tooth of the bit being damaged

n: the drilling pressure needed when the power of turbine in the bottom reach the maximum value during turbine drilling

n: the factor responding the relationship beween other factors and drilling rate when the drilling pressure ,rotate speed and the abrasion of the tooth are constant

n: the factor responding the relationship beween other factors and drilling rate when the drilling pressure ,rotate speed , the abrasion degree of the tooth ,hydraulic premeter and pressure difference are constant

n: the bump generating when the drilling rate does’t increase linearly any more whatever increase the drilling pressure or the rotate speed or increase the both

n: also called optimized hydraulic parameter, it is referred to optimized every hydraulic parameters to achieve drilling pressure ,drilling speed cooperate considerately and gain optimal effect of drilling.