抽油杆扶正器挡环锁紧工艺研究

Study on Locking Technology of Sucker Rod Centralizer

针对采用挡环定位扶正器旋转式扶正抽油杆在井下工作中挡环窜位导致扶正器脱落,由此失去扶正作用并增加打捞作业、增大开采成本问题等而开展研究。通过分析影响扶正器档环锁紧力的主要因素,采取三项主要措施:首先对加工挡环的原料尼龙PA66的干燥工艺参数进行调整,保证档环材质致密;二是采用正交实验优化注塑工艺参数,找到最优注塑压力、温度和时间组合;三是对档环和抽油杆表面之间的固定方式改进,增加胶黏剂层。通过以上措施有效提高了挡环锁紧力。

The baffle ring positioning centralizer is used to centralize the rotary sucker rod in well downhole operation, but the centralizermay falls off which caused by the baffle ring channel losing the centralizer function to increase the fishing operation and the mining cost. Byanalyzing the main factors affecting the clamping force of the centralizer baffle ring, three main measures are taken to solve the problem：First, the drying process parameters of the raw material nylon PA66 used to machine the baffle ring are adjusted to ensure the density of thedense material; Second, to find the optimal combination of the injection pressure, temperature and time using the orthogonal experiment tooptimize the injection molding process parameters; Third, to improve the fixed mode between the check ring and the sucker rod surface toincrease the adhesive layer. The baffle ring locking force can be improved the above measures effectively.