Mechanical Design of Downhole Tractor Based on Two-Way Self-locking Mechanism

2017 5th International Conference on Mechanical Engineering, Materials Science and Civil Engineering

机械制造;材料科学;土木建筑工程

Fang, Delei^1 ; Shang, Jianzhong^1 ; Luo, Zirong^1 ; Wu, Guoheng^1 ; Liu, Yiying^1

National University of Defense Technology, College of Mechatronic Engineering and Automation, Changsha

410073, China^1

关键词: Contour designs;    High reliability;    Locking mechanism;    Mathematical expressions;    Mechanical analysis;    Mechanical design;    Mechanical structures;    Self locking mechanism;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/324/1/012030/pdf
DOI  :  10.1088/1757-899X/324/1/012030

来源: IOP

【 摘 要 】

Based on the technology of horizontal well tractor, a kind of downhole tractor was developed which can realize Two-Way self-locking function. Aiming at the needs of horizontal well logging to realize the target of small size, high traction and high reliability, the tractor selects unique heart-shaped CAM as the locking mechanism. The motion principle of telescopic downhole tractor, the design of mechanical structure and locking principle of the locking mechanism are all analyzed. The mathematical expressions of traction are obtained by mechanical analysis of parallel support rod in the locking mechanism. The force analysis and contour design of the heart-shaped CAM are performed, which can lay the foundation for the development of tractor prototype.