China Petroleum & Chemical Corporation
Downhole drilling apparatus and method of control thereof

Abstract:

A downhole drilling system for reducing impact of vibration comprises a drill string having a bottom hole assembly (BHA) and a controller configured to control the downhole drilling system. The BHA includes a measurement sub configured to measure one or more of lateral, torsional, and axial vibrations. In this system, the controller controls the downhole drilling system based on a drilling environmental profile including drilling parameters of one or more of the lateral, torsional, and axial vibrations and further based on a vibration mode and a vibration level of the one or more of the lateral, torsional, and axial vibrations determined from the drilling environmental profile.