2008年1月28日,国内加工的首批PAC扣钻杆顺利抵达印度尼西亚港口。这是我国第一次成功加工PAC扣钻杆并出口,填补了中国此类产品和加工技术的空白。PAC扣钻杆是API标准中的一种特殊扣钻杆,螺纹类似偏梯形,内外螺纹接头外径比普通的要小,螺纹牙高尺寸小,连接强度高。由于其接头外 January 28, 2008, the first domestic processing of PAC deduction drill pipe successfully arrived in the Indonesian port. This is the first time in China successfully processed PAC deduction drill pipe and export, to fill China’s blank of such products and processing technology. PAC deduction drill pipe is a kind of special deduction drill rod in the API standard. The thread is similar to the trapezoid. The external diameter of the internal and external thread joints is smaller than that of ordinary thread. The thread tooth size is small and the connection strength is high. Due to its connector