bumper sub

常见例句

This topic originates from the sub-topic of the national grain bumper science and technology project.
本課題來源於國家糧食豐産科技工程的子課題。
A disadvantage of the bumper sub is maintenance costs both for the tool itself and lost time due to tripping pipe when one fails.
緩沖短節的缺點是維護工具本身的費用和失傚時起下鑽造成的時間損失。
In light of the commonly seen downhole breakdown of drilling pipe sticking in the drilling process, the new-type fully hydraulic while-drilling bumper sub was developed.
針對鑽井過程中常見的井下卡鑽事故，研制了新型全液壓式隨鑽震擊器。