There have long been quality measures such as the drilling difficulty index and the wellborequality scorecard.
先前早就有表征井身质量的方法，如钻进难度系数和井身质量记分卡。
2
Borehole curvature is one of significant index to evaluate Angle build-up capacity and wellborequality, is very important to realize safety, speedily and efficiently drilling.
井眼曲率作为衡量工具造斜能力和评价井身质量的重要指标之一，对实现安全、快速、高效钻井具有重要意义。
3
Optimizing wellbore trajectory design is the key link to ensure the quality of well bore, decrease accidents in well hole and lower drilling cost.