ANALYSIS OF DRILLSTRING DYNAMICS USING A ANGULAR RATE SENSOR

摘要

Downhole drilling vibration analysis uses an angular ratesensor on a drilling assembly. During drilling operations, the sensor measuresthe angular rate of the drilling assembly. Processing circuitry is operativelycoupled to the angular rate sensor and is configured to determinewhether torsional type vibrations are occurring during drilling based on theangular rate data. Drilling operations can then be modified to overcome ormitigate the torsional type vibrations.