NDLI: Dynamical measurement of drill tool attitude at stick-slip and continuous rotation mode in vertical drilling

Content Provider	IEEE Xplore Digital Library
Author	Zong Yanbo Shi Xiaofeng Zhang Huihui Zhang Jun
Copyright Year	2011
Description	Author affiliation: School of Electronic and Information Engineering, BeiHang University, Beijing, China (Zong Yanbo; Shi Xiaofeng; Zhang Huihui; Zhang Jun)
Abstract	Wellbores with less than 3 degree of inclination are generally considered vertical in oil industry, as it is difficult to maintain wellbores vertical by traditional methods, the strap-down automatic vertical drilling system (AVDS) was developed to drill straight down fast and smoothly. The determination of drill tool attitudes is premise and critical for real time deviation control and correction in vertical drilling, where accelerometers and magnetometers sensors synchronously rotate with drilling tools. A dynamical measurement while drilling (MWD) algorithm is proposed in this paper by taking the magnetometers signals as rotation modes indicator. The drill tool rotation modes are divided into three categories: static, continuous rotation and stick-slip rotation mode. In static mode, the accelerators signals are seldom affected by vibration, normal MWD method is enough, so this paper focuses on measurement at stick-slip and continuous rotation modes. To filtering out real signals from the noised accelerometers by vibration, a pseudo-static model is applied for stick-slip mode; in continuous rotation mode, the algorithm is based on narrow band pass filter and the concept of evenly re-sampling in angle domain. The actual drilling results show that the proposed algorithm could provide reliable azimuth and inclination angle of drill tool.
Starting Page	2698
Ending Page	2701
File Size	527570
Page Count	4
File Format	PDF
ISBN	9781424487547
e-ISBN	9781424487561
e-ISBN	9781424487554
DOI	10.1109/ICIEA.2011.5976053
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetometers Face Rotation measurement Accelerometers Magnetic separation Band pass filters Heuristic algorithms rotation mode classfication strap-down automatic vertical drilling dynamical measurement of attitude
Content Type	Text
Resource Type	Article

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