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Sensors 2018, 18(9), 2944; https://doi.org/10.3390/s18092944

Dynamic Toolface Estimation for Rotary Steerable Drilling System

1
College of Information and Control Engineering, China University of Petroleum, Qingdao 266580, China
2
School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
*
Author to whom correspondence should be addressed.
Received: 16 July 2018 / Revised: 24 August 2018 / Accepted: 1 September 2018 / Published: 4 September 2018
(This article belongs to the Special Issue Sensing in Oil and Gas Applications)
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Abstract

In drilling engineering, Toolface is an angle used to describe bit direction. It is a challenging task to accurately estimate Toolface while drilling because of the downhole harsh conditions, but it is a primary step for the dynamic point-the-bit rotary steerable system (DPRSS). A new dynamic Toolface estimator is present, which fuses measurements from two accelerometers and one gyro. A dual-accelerometer Toolface measuring method is designed to compensate the circumferential acceleration of DPRSS. A nonlinear Complementary Filter (CF) is used to suppress the effect of vibration and axial acceleration. The frequency-domain characteristics of nonlinear CF are analyzed and its natural frequency is determined adaptively based on real time drilling conditions. This new estimator is validated on a DPRSS prototype under typical drilling modes; it is demonstrated with high robustness and follows the references satisfactorily. View Full-Text
Keywords: dynamic Toolface estimation; nonlinear complementary filter; rotary steerable drilling system; accelerometer; gyro dynamic Toolface estimation; nonlinear complementary filter; rotary steerable drilling system; accelerometer; gyro
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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MDPI and ACS Style

Wang, W.; Geng, Y.; Wang, K.; Si, J.; Fiaux, J.O. Dynamic Toolface Estimation for Rotary Steerable Drilling System. Sensors 2018, 18, 2944.

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