When is has been decided where we are going to drill, we put up at the surface an oil derrick.

当确定钻孔地点后，我们就在那里竖起一个井架。

youdao

As a new riser handling system, the vertical riser handling system is an extensional application of successful derrick drill stern vertical handling system in drilling machines.

隔水管垂直存放系统是一种新颖的隔水管处理系统，它是钻机行业井架内钻杆垂直存放系统成功解决方法的外延应用。

youdao

When it has been decided where we are going to drill, we put up at the surface an oil derrick.

当确定钻孔地点后，我们就在那里竖起一个井架。

youdao

What they do is they sign a lease, and then a company comes along eventually and sets up a well and a derrick, and then they drill the well themselves.

NPR: Drilling for Gas in Dallas-Fort Worth