一、目的 钻杆损坏常常会使钻井成本增加。因为这些损坏会造成花钱的打捞作业,损失钢材,耗费时间,甚至有可能造成全井或部分井段报废。为了对付这种潜在的威协,要求钻井人员经常检查钻具的状况。因此,在接受钻井任务以后,对使用过的钻杆要进行检查和分级,其目的就是要确定它是否能继续用来钻井。能适用于钻井工作的钻杆,要具有足够的强度,其内、外表面没有足以造成钻杆事故的各种缺陷。 First, the purpose of the drill pipe damage will often increase drilling costs. Because these damage will result in expensive fishing operations, loss of steel, time-consuming, and may even cause the whole well or part of the well to be scrapped. To counter this potential threat, drilling personnel are required to constantly check the status of the drill. Therefore, after receiving the drilling mission, the drill pipe used to be checked and grading, the purpose is to determine whether it can continue to be used to drill. The drill pipe that can be used for drilling work should have sufficient strength, and there are no various defects on the inner and outer surfaces that are enough to cause drill pipe accidents.