摘要
A ground monitoring system was developed to diagnose casing and tooljoint wear in a well dur-ing drilling by combining the analysis of wear debris with detection of the tooljoints. The result shows that the wear debris concentration in the circulating drilling mud in a well reflects the total wear rate of the tribo-elements in the well, while the wear detection of a tooljoint can indicate its wear loss between two contigu-ous times of drill-pipe lifting. A diagnosis method that integrates the two types of information was developed to identify severe wear regions in well casing. Theoretical analyses and field test show that the severe cas-ing wear region can be located relatively accurately by the integrated method. This method presents a new ground casing wear diagnosis approach with good real-time results.
A ground monitoring system was developed to diagnose casing and tooljoint wear in a well dur-ing drilling by combining the analysis of wear debris with detection of the tooljoints. The result shows that the wear debris concentration in the circulating drilling mud in a well reflects the total wear rate of the tribo-elements in the well, while the wear detection of a tooljoint can indicate its wear loss between two contigu-ous times of drill-pipe lifting. A diagnosis method that integrates the two types of information was developed to identify severe wear regions in well casing. Theoretical analyses and field test show that the severe cas-ing wear region can be located relatively accurately by the integrated method. This method presents a new ground casing wear diagnosis approach with good real-time results.
