external upset drill pipe

例句：

1. 1.The external pressure drill pipe is used to penetrate rock formations.
   外部压力钻杆用于穿透岩石层。
2. 2. The engineer carefully selected the appropriate external pressure drill pipe for the job.
   工程师仔细选择了适合这项工作的外部压力钻杆。
3. 3.During the drilling process, the external pressure drill pipe helps to maintain a stable borehole.
   在钻井过程中，外部压力钻杆有助于保持稳定的井眼。