The principles &methods of type selection, optimum design of well trajectory , selection of sidetrack ways, design of drill strings &drilling fluid and completion design are introduced in this paper.

• 介绍了多底井、分支井类型选择及井眼轨迹优化设计、侧钻方式选择、钻柱设计、钻井液设计和完井方式设计的原则和方法。