Date of download: 9/26/2017 Copyright © ASME. All rights reserved. From: Dynamic Measurement of Spatial Attitude at Bottom Rotating Drillstring: Simulation, Experimental, and Field Test J. Energy Resour. Technol. 2015;138(2):022903-022903-9. doi:10.1115/1.4031742 Figure Legend: Sketch diagram of the structure of rotary steerable drilling system (in the measurement section, equipped with triaxial accelerometer and triaxial fluxgate on the xyz axis, respectively): (1) strap-down stabilized platform, (2) oriented actuator, (3) rotor, (4) power section, (5) measurement and control section, (6) servo section, (7) plate valve, (8) rib, and (9) bit