The most obvious part of a drilling rig is called “a derrick”. It is used to lift sections of pipe, which are lowered into the hole made by the drill.
The most obvious part of a drilling rig is called “a derrick”. It is used to lift sections of pipe, which are lowered into the hole made by the drill.
钻机中最显眼的部件叫“井架”，井架用来吊升分节油管，把油管放入由钻头打出的孔中。