常规游梁式抽油机的增程与节能改造研究

Research on stroke lengthening and power saving modificationof conventional beam-pumping units

针对常规游梁式抽油机效率低、能耗高,油田注水开发进入高含水开采阶段使得在役机型偏小不能适应生产需要的实际,提出采用偏轮式高效节能抽油机(六杆机)的偏轮技术对常规游梁式抽油机(四杆机)进行增程和节能改造的观点,并应用数值模拟及优化方法,确定了改造机的关键尺寸参数.经过厂内改造试验和现场应用试验表明,改造机运行平稳可靠,不仅节能效果明显,冲程增加40%,可满足注水开采的要求,而且使已经淘汰的抽油机得到重新利用,改造费用仅为购置新机的30%左右,具有较高的社会和经济效益.

Considering the conventional beam-pumping unit which is of low efficiency and high power consumption can't meet the geologic conditions of oil field water-injecting exploitation, authors put forward that it should be modified with eccentric wheel type of high efficiency power saving pumping unit, so as to realize stroke lengthening and power saving. Using numerical simulation and optimization method, authors determine the key size parameters of modified pumping unit. The results of factory modification test and on-site application test have showed that the modified pumping-unit works in good conditions with 40% stroke increment and obvious power saving effect. In addition, it has met the requirements of new geologic conditions, and has enabled the obsolete pumping units to be re-utilized. The expenses on the modification activity accounts for only 30% that of purchasing a new one. Thus, higher social and economical benefits can be obtained.