Design and Implementation of Closed-Loop Control of Vector Force in Static Push-the-bit Rotary Steering System
Liang Yao*, Kang Hong-bo, Liu Yue, Chen wen, Sun Yan, Ma Li, Zhao Yan-Wei
1. Research Institute of Logging Technology, China National Logging Corporation, Beijing 100200, China
2. School of automation, Xi’an University of Posts & Telecommunications, Xi’an 710061, China
Abstract Rotary steering systems (RSSs) have been increasingly used to develop horizontal wells. A static push-the-bit RSS uses three hydraulic modules with varying degrees of expansion and contraction to achieve changes in the pushing force acting on the wellbore in diff erent sizes and directions within a circular range, ultimately allowing the wellbore trajectory to be drilled in a predetermined direction. By analyzing its mathematical principles and the actual characteristics of the instrument, a vector force closed-loop control method, including steering and holding modes, was designed. The adjustment criteria for the three hydraulic modules are determined to achieve rapid adjustment of the vector force. The theoretical feasibility of the developed method was verifi ed by comparing its results with the on-site application data of an imported rotary guidance system.
Fund: This work was supported by the Opening Foundation of China National Logging Corporation (CNLC2022-9C06) and the China Petroleum Technical Service Corporation’s science project ‘Development and application of 475 rotary steering system’ (2024T-001-001).
About author: Liang Yao, a senior engineer, received his doctoral degree in 2020 in geological resources and geological engineering from China University of Petroleum (Beijing). He works at the Research Institute of Logging Technology, China’s national logging corporation. His research interests are rotary steering systems and logging while drilling systems. E-mail: szliangy@cnpc.com.cn
Cite this article:
. Design and Implementation of Closed-Loop Control of Vector Force in Static Push-the-bit Rotary Steering System[J]. APPLIED GEOPHYSICS, 2025, 22(3): 796-803.
2025, Vol. 22 
