Control Strategy for Automatic Anti-Deviation Drilling System
Xie Jian-gang · Journal of Wuhan University of Science and Technology · 2006
The structure and control principle of AADDS(automatic anti-deviation drilling system) are analyzed,and the control method is put forward.When the well deviates,the microprocessor makes the controlled stabilizer work to produce a drop force which will reduce the inclination.The azimuth angle of the bit may change at the same time.If the azimuth angle is big enough,the state of the controlled stabilizer should be adjusted.The allowed inclination angle after correction is between zero and the biggest allowed inclination angle.The ways of opening,adjusting the state of the controlled stabilizer and closing are the theoretical basis of modeling and simulation of the control system.