常見例句Position contrnl System 位置控制系統(tǒng)s: Steerable rotary closed - loop is very complex.By closed - loop contrnl of downhole and its own adjusting, the drill bit goes ahead along the pre - planed profile during entire drilling procedure. 井下自動(dòng)控制定向旋轉(zhuǎn)閉環(huán)鉆井系統(tǒng)是指全程旋轉(zhuǎn)、井下閉環(huán)控制，鉆頭沿著設(shè)計(jì)軌跡鉆進(jìn)，它是個(gè)非常復(fù)雜的系統(tǒng)。 返回 contrnl