Abstract
Progressing cavity pumping operation is one of the five main artificial lift technologies in current oil industry. It has been successfully applied to complex well conditions such as viscous crude oil, high sand-content oil and the offshore platform. To protect the key components effectively and achieve the longest economical service life of the pumping system, it is necessary to establish the flow rate monitoring system. Considering the rate of revolution affecting factors, over-current protection of motor during start-up and production-extraction balancing relationship, 3-grade control tactics was put forward. Also, some technical problems in the monitoring platform such as the collection of intake pressure and down-hole temperature signal, selection of hardware and web-based communication were introduced in detail.
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