Open Access

ARTICLE

Research on a Triaxial Rate of Penetration (ROP) Model Related to Unloading in Oil & Gas Drilling

Hui Zhang¹, Deli Gao^1,2, Xiaopin Xie¹

1 Key Lab of Petroleum Engineering in the Ministry of Education, China University of Petroleum, Beijing 102249, China.
2 Corresponding author: Deli GAO, E-mail: gaodeli@cup.edu.cn; zhanghui3702@163.com