This clay fouls drilling tools and plugs piping, both severe problems for drilling crews.

这类粘土层妨碍钻井工具的使用，堵塞管柱，这些都会对井队产生严重问题。

youdao

This clay fouls drilling tools and plugs piping, both severe problems for drilling crews.

这类粘土层妨碍钻井工具的使用，堵塞管柱，这些都会对井队产生严重问题。

youdao