bumper sub

常见例句

This topic originates from the sub-topic of the national grain bumper science and technology project.
本课题来源于国家粮食丰产科技工程的子课题。
A disadvantage of the bumper sub is maintenance costs both for the tool itself and lost time due to tripping pipe when one fails.
缓冲短节的缺点是维护工具本身的费用和失效时起下钻造成的时间损失。
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.
针对钻井过程中常见的井下卡钻事故，研制了新型全液压式随钻震击器。