短語詞組短語balanced activity drilling fluid 反相乳化鑽井液non balanced drilling 非平衡鑽進(jìn)balanced -pressure drilling 平衡壓力鑽井balanced drilling techniques 平衡鑽進(jìn)pressure balanced drilling techniques 壓力平衡鑽進(jìn)pressure balanced drilling bumper sub 壓力平衡式鑽井震擊器under -balanced drilling technique 欠平衡鑽井技術(shù)air under -balanced drilling technique 空氣欠平衡 返回 balanced drilling