drillstring的用法和樣例：
例句
- The contact between drillstring and bore hole wall in the process of horizontal drilling is of large area and geometrically nonlinear.
長(cháng)中半徑水平井鉆柱與井壁的接觸問(wèn)題是大面積接觸的幾何非線(xiàn)性問(wèn)題。 - A transmitter toroid induces a low-frequency current in the drillstring, which flows out of the bit and returns farther up the string.
發(fā)射線(xiàn)圈在鉆柱內感應出低頻電流，從鉆頭流出，在鉆柱上部返回。
