GRAVITY ACCELERATION MEASUREMENT APPARATUS AND EXTRACTION METHOD IN A ROTATING STATE

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United States of America Patent

APP PUB NO 20180223646A1
SERIAL NO

15553558

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Abstract

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An apparatus for measuring gravity acceleration of a drilling tool comprises sensors and a measurement circuit. The sensor comprises a three-axis gravity accelerometer, a reference measurement sensor and a temperature sensor. The three-axis gravity accelerometer measures acceleration component signals in three mutually orthogonal directions, and the reference measurement sensor generates a signal that varies with rotation and is not affected by vibration or shock to serve as a reference signal. The temperature sensor measures the temperature in the apparatus to compensate the temperature effect of the gravity accelerometers. The measurement circuit acquires output signals of the sensors and performs cross-correlation processing on the accelerometer components using the reference signal to extract gravity acceleration signals so as to eliminate centrifugal acceleration, vibration, shock and other interferences generated by rotation. The non-interference gravity acceleration signals is used for calculating an inclination angle and a toolface angle of a drilling tool in the rotating state.

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Patent Owner(s)

Patent OwnerAddress
INSTITUTE OF GEOLOGY AND GEOPHYSICS CHINESE ACADEMY OF SCIENCES100029 BEIJING CITY CHAOYANG DISTRICT BEITUCHENG WEST ROAD NO 19 MUNICIPAL DISTRICT BEIJING CITY 100029

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
CHEN, Wenxuan Beijing, CN 24 4
DI, Qingyun Beijing, CN 33 4
LIU, Jianguang Beijing, CN 2 1
SUN, Yuntao Beijing, CN 20 3
YANG, Yongyou Beijing, CN 25 3
ZHANG, Wenxiu Beijing, CN 21 3
ZHENG, Jian Beijing, CN 75 88

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