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利用示功图并结合现场憋泵及产量核实数据,可以用来判断油管断脱,当抽油机井现场憋泵表现为油压不起压力,核实产量无液(抽喷井除外)等异常现象,且验证的示功图有较大的上下载荷差,即交变载荷较大,示功图显示近似泵凡尔正常,则可以判断油管发生断脱,断脱部位与上载荷或交变载荷大小有关,上载荷或交变载荷越大,油管断的部位越靠近上部,反之相反。通过现场应用表明该方法具有较高的准确性。
The use of dynamometer and combined with on-site feed pump and output verification data can be used to judge the tubing breakage. When the pumping well is on-site, the pump can not afford to exert pressure and verify the anomaly such as no output (except pumping well) , And the proof of dynamometer has a larger upper and lower load difference, that is, a larger alternating load, dynamometer shows the approximate normal pump Versaille, you can determine the tubing off, disconnect the site and the load or alternating load The size of the load or alternating load on the larger, broken pipe closer to the upper part of the site, on the contrary. The field application shows that the method has high accuracy.