... principal problems of the standard approach to condition monitoring, i.e. false alarms and bad conditions not alarmed, can be solved. This is accomplished by creating a mathematical representation of each measurement in terms of the others and thus considering the combination of various measurements around...

... at a considerable additional cost and is often difficult to justify on low-cost land-based wells. On the other hand, the conventional suite of low-cost surface sensors often drift out of calibration and, without manual intervention, can provide bad data that may lead to missed or false alarms. It would be highly...