抽油杆脱扣后,抽油泵无法工作。现场上抽油杆脱扣的现象较普遍,如1983年5月至8月,施工30口井,有17口井的抽油杆脱扣,占57％。抽油杆脱扣的原因很多,其中主要是上扣时没有达到所要求的上扣扭矩。上扣扭矩,是指上满扣以后,再用一定的扭矩扭紧,使接头产生自身联接载荷。上扣扭矩和预紧力之间的函数关系很复杂。通过理论计算和实际验证,其关系如附 Sucker rod tripping, the pump can not work. On-site sucker rod tripping phenomenon is more common, such as May 1983 to August, the construction of 30 wells, 17 wells sucker trip, accounting for 57%. Sucker rod tripping for many reasons, mainly when the buckle did not meet the required fastening torque. On the buckle torque, refers to the full buckle, then use a certain torque to tighten, so that the joints have their own connection load. The relationship between the fastening torque and the preload is complex. Through theoretical calculations and practical verification, the relationship is as attached