Sisal: a supervisory system for oil wells

artificial lifting in oil industry uses a variety of methods and specific automation equipments for each method. supervisory systems to these processes are usually specific for a unique method and/or for a unique manufacturer. to avoid this problem, it has been developed a supervisory system named sisal, conceived for supervising wells with different lift methods and different automation equipments. sisal is now in operation in several brazilian states. this work shows how this system has been developed and presents some details of the sisal's modules dealing with the artificial lift method called plunger lift.