bumper sub

基本解釋

This topic originates from the sub-topic of the national grain bumper science and technology project.
本課題來源于國家糧食豐產(chǎn)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(jié)的缺點是維護工具本身的費用和失效時起下鉆造成的時間損失。
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.
針對鉆井過程中常見的井下卡鉆事故，研制了新型全液壓式隨鉆震擊器。