A microcomputer based system for design and diagnostic analysis of sucker rod pumping systems has been developed at Chevron Oil Field Research. The system is currently being applied in 34 field locations that cover over 95% of Chevron's rod pump wells.

System hardware consists of a portable dynamometer for field data collection and an office based microcomputer for data processing. Field dynamometer data are entered with a digitizing tablet, telephone modem or direct RS-232 cable connection.

The system's unique software incorporates state-of-the-art technology in an easy to use package. Since the majority of the users are non-degreed field personnel, the programs provide extensive user help, error trapping and error recovery features. The software perform two main functions: diagnostic analysis and system design. Algorithms used include wave equation modeling, an exact pumping unit kinematic model, and an ability to include inertia effects in pumping unit torque analysis. An in-house developed expert advisor program assists in interpretation and implementation of results. This program consists of a pattern recognition scheme and rules based on company expertise in rod pump system troubleshooting.

Software design was aimed at reducing the time and effort involved in collecting, processing and applying data. As a result, the system has been accepted by field personnel and is used daily as a tool to detect and correct problems. This has resulted is significant revenue increases documented in several field studies.

You can access this article if you purchase or spend a download.