US 12,264,544 B2
Downhole traction system
Jianguo Zhao, Chengdu (CN); Qingyou Liu, Chengdu (CN); Haiyan Zhu, Chengdu (CN); Min Wan, Chengdu (CN); Guorong Wang, Chengdu (CN); Xuecheng Dong, Chengdu (CN); Xu Luo, Chengdu (CN); Yingju Pei, Chengdu (CN); and Xingming Wang, Chengdu (CN)
Assigned to Chengdu University of Technology, Chengdu (CN)
Filed by Chengdu University of Technology, Chengdu (CN)
Filed on Nov. 14, 2023, as Appl. No. 18/508,923.
Claims priority of application No. 202310475101.3 (CN), filed on Apr. 28, 2023; application No. 202310477882.X (CN), filed on Apr. 28, 2023; and application No. 202310477889.1 (CN), filed on Apr. 28, 2023.
Prior Publication US 2024/0360733 A1, Oct. 31, 2024
Int. Cl. E21B 23/00 (2006.01); E21B 23/14 (2006.01); E21B 47/06 (2012.01); E21B 47/09 (2012.01); E21B 47/13 (2012.01)
CPC E21B 23/001 (2020.05) [E21B 23/14 (2013.01); E21B 47/06 (2013.01); E21B 47/09 (2013.01); E21B 47/13 (2020.05)] 19 Claims
OG exemplary drawing
 
1. A downhole traction system, comprising a driving system and a downhole wheeled tractor, wherein the driving system is connected with the downhole wheeled tractor; the downhole wheeled tractor comprises a tractor body, a power unit and a plurality of traction units; the plurality of traction units are arranged along the extension direction of the tractor body; each of the traction units comprises a driving arm, a supporting arm, a supporting wheel, a driving assembly and a supporting assembly; the driving arm and the supporting arm are movably connected with the tractor body; and the supporting wheel is connected with the driving arm and the supporting arm;
wherein the power unit comprises an optical fiber nipple, a downhole measurement and control module, and a downhole control nipple; an optical transmitter and a pulse code modulation (PCM) electrical transceiver are installed in the optical fiber nipple; a downhole pressure sensor, a downhole speed sensor and a downhole displacement sensor are installed in the downhole measurement and control module; and the downhole control nipple is composed of a liquid storage tank, a control module and an exhaust port.