Virtual while-drilling Direction and Inclination (D&I) sensor

Abstract

The traditional attitude measurement algorithm is accompanied by the high measurement cost of the attitude sensor while drilling, the difficulty of data acquisition, and the strong interference of the test environment during the testing process. This paper proposes a virtual six-axis attitude sensor while drilling. Based on the MATLAB platform as the host computer and the National Instruments (NI) data acquisition card as the lower computer, this paper realizes the design of the virtual measurement-while-drilling attitude sensor. MATLAB GUI was used to design the system interface, the callback function was used to link the attitude inversion algorithm for data calculation, the computer interface was connected to the data acquisition card to complete the data output, finally, a hardware-in-the-loop (HIL) system was formed. The system can be used to preliminarily verify the attitude correction algorithm of down-hole drilling tools, provide a theoretical basis for its compensation scheme, and reduce problems such as excessive cost in the process of instrument development by simulating the working environment. The test results show that the output data error of the designed virtual-while-drilling attitude sensor is less than 0.4% and has high accuracy.