Programmable Logic Controllers In Oilfield Production Operations

In recent years programmable logic controllers (PLCs) have evolved to such a point that it is often technologically desirable and more economical to apply them preferentially over hard wired relays in the small control systems typically found in oil field production facilities. This paper will provide a short history of PLC development, describe the features and capabilities of PLC"s, examine possible applications for small PLC's in oil field production operations, and illustrate several applications.