常見例句雙語(yǔ)例句What is the drill pipe string weight in air?鉆桿在空氣中的重量是多少?blog.sina.com.cnThe riser’s inner hollow core (a pipe within a pipe) is reserved for the drill string.立管內(nèi)部核心是空心的(管中管),留給鉆柱使用。The contact and friction of a drill pipe string with borehole wall and its deformation are analyzed and calculated with modified Newton iteration and approximate gradient increment of loading.用修正的牛頓迭代法進(jìn)行迭代運(yùn)算和用近似梯度增量法修改載荷增量,并對(duì)鉆柱與井壁的接觸摩擦和鉆柱變形進(jìn)行了分析計(jì)算。權(quán)威例句The new pipe will be placed right next to the small section of abandoned pipe where the drill string got stuck.FORBES: McMoRan Update From Enercom Oil & Gas Conference 返回 the drill pipe string