Sensor Self-Monitoring Approach for Gas and Oil Complex Electric Drive Systems

The paper suggests a self-monitoring approach of platinum resistance thermometer to increase reliability of the electric drive of drilling rigs pump. Since the approach works in theory, one of the parts of the work is an experimental investigation that proves the method applicability to the real technological process. During the experiment the platinum resistance thermometer was placed into the climate chamber and the current was measured. The purpose of the experiment is to prove that the value of the self-heating index in the platinum sensor is constant in the full temperature range. For each temperature point from -40°C to +100°C with 10°C step platinum's self-heating index was calculated. As a result, the point above was confirmed, which in its turn allows for the conclusion that the value of the self-heating index can be used to indicate whether sensor's metrological characteristics was changed. Thus the method based on platinum self-heat can be used to monitor sensor state and predict its failure. Sensors based on this method can be used in fields where delays related with dismantling of the device or its failure caused huge economic loses, e.g. in the drilling of wells for gas and oil.