人造金刚石孕镶钻头井底破岩功率的研究及其应用

笔者把井底破岩过程看作一个叫做“黑箱”的控制系统,它的输入(P、n、Q等)和输出(扭矩M,功率N等)之间的规律性,可借助计算机拟合出来。笔者通过大量实验建立的功率公式可用于预测和控制。多次试验表明,若井底破岩功率超过了预测区间的上限(95%可信度),则烧钻很快发生。

THE RESEARCH AND APPLICATION OF ROCK-CUTTING POWER BY SYNTHETIC DIAMOND IMPREGNATED BIT AT THE BOTTOM OF A HOLE

The mechanical process of cutting rock in the bottom of a hole is not clear, it can be meant by a "black-box" controlling system, its import ( P, n. Q, etc. ) and export ( torque M, power N etc. )can be controlled and measured. The relation between the import and export can be simulated by a computer. Author made experiments 524 times for 17 kinds of rocks and established two formulae of computation power. Applying the new power formulae, the forecasting and control can be made.It will give a forecasting range of power with the degree of confidence 95% as normal drilling. Experiments have shown that when the actual power quantity of cutting . bottom rock exceeds the forecasting upper limit with violent surge of power curve, burning of the diamond bit will occur in a very short time.