Computer Diagnostic System of the Subsurface Dynagraphs of Oil Well Sucker Rod Pumps
有杆抽油泵井下抽油示功图计算机诊断系统

In this paper the computer diagnostic system of the subsurface dynagraphs of sucker rod pumps is developed. It is composed of a digital dynamometer, a data acquisition interface, and a computer system. The subsurface dynagraphs are calculated and plotted according to the measured load and displacement from a polished rod on the ground. Then, the operation conditions of the whole pumping system can be monitored and diagnosed.