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- W2389418900 abstract "At-Bit Inclinometer(ABI) is used to measure the real well trajectory while drilling, and it is important component for realizing the automation and intelligentization of drilling device. Due to the field calibration condition, ABI can only be calibrated with customized two-axis turntable, which is not suitable for traditional 12-position calibration. So, according to the field calibration condition, an optimal 8-position calibration for ABI was introduced based on the analysis of calibration principle. The information matrix of least square estimation for this method was defined, its determinant was optimized with numerical calculation, and the optimal position parameter which maximizes the determinant was found. The calibration parameters obtained by the optimal 8-position calibration for ABI with calibration experiment was compared with that obtained by traditional 12-position calibration, and the precision of this method was verified by the comparison. The results show that the relative errors of the scale factors and zero deviations between the two methods are less than 10-5, and that the errors of misalignment angles between the two methods are less than 2, which can fully satisfy the requirements of practical applications." @default.
- W2389418900 created "2016-06-24" @default.
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- W2389418900 date "2014-01-01" @default.
- W2389418900 modified "2023-09-24" @default.
- W2389418900 title "Optimal 8-position calibration for at-bit inclinometer" @default.
- W2389418900 hasPublicationYear "2014" @default.
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