Institute of Geology and Geophysics, Chinese Academy of Sciences
发明人:
SUN Yuntao,CHEN Wenxuan,ZHANG Wenxiu,YANG Yongyou,ZHENG Jian
申请号:
US201715692703
公开号:
US2018058849(A1)
申请日:
2017.08.31
申请国别(地区):
美国
年份:
2018
代理人:
摘要:
A near-bit dynamic well deviation angle measurement apparatus includes a circuit board and 2n+1 accelerometers. One accelerometer is installed in an axial direction of a drilling tool and forms n sets of three-axis orthogonal installation together with other 2n accelerometers. The accelerometer installed in the axial direction measures Az′, and the remaining accelerometers respectively measure n X-axis radial components and n Y-axis radial components corresponding to the n X-axis radial components. A filter and a data processing unit are integrated on the circuit board. The circuit board acquires signals in which the components are eliminated by the accelerators in real time, and further high-frequency vibration and impact interference in the signals are filtered out by using the filter to obtain non-interference gravitational acceleration components Ax, Ay and Az, and further a well deviation angle is calculated.