钻头的进尺提高效率有无显著性差异的判定

ASSESSMENT OF THE SIGNIFICANCE DIFFERENCE AMONG THE IMPROVED EFFICIENCIES OF A NEW DRILL BIT ON ITS DRILLING FOOTAGE OF DIFFERENT LAYERS

本文解决了新钻头对于m(m≥2)种地层的进尺提高效率有无显著性差异的问题。文中提出的数学模式可适用于其它各种类似的问题,最后举例说明方法的实际应用及通常易犯的错误。

This paper solves the problem of the existance of the significance difference among the improved efficiencies of a new bit on drilling m (m≥2) layers. The mathematical models presented in this paper are applicable to other related problems. Finally, two simple examples are given to illustra e its practical application. which also show that the general methods to solve such problems are usually wrong.