The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2026
Filed:
Apr. 15, 2026
Southwest Petroleum University, Chengdu, CN;
Qiangui Zhang, Jintang, CN;
Xiangyu Fan, Chengdu, CN;
Cheng Meng, Ziyang, CN;
Hongxi Li, Chengdu, CN;
Tianshou MA, Chengdu, CN;
Zhilin Li, Deyang, CN;
Pengfei Zhao, Chengdu, CN;
Zhuzheng Li, Pengzhou, CN;
Lichun Jia, Pengzhou, CN;
Yufei Chen, Chengdu, CN;
Southwest Petroleum University, Chengdu, CN;
Abstract
The present application discloses a method for evaluating rock compressive strength based on cuttings mineral composition, nano-indentation, and friction tests, relating to the field of petroleum and natural gas exploration and development. Specifically, relative contents of rock minerals, average nano-indentation crack lengths, nano-indentation load-displacement curves of each rock mineral, and rock friction coefficient are first obtained through rock X-ray diffraction experiments, nano-indentation experiments, and friction tests; subsequently, based on the principle of energy conservation, elastic modulus of each rock mineral and plane-strain fracture toughness of each rock mineral are calculated; then, according to the principle of weighted superposition, each mineral parameter is weighted and integrated based on a proportion to obtain rock failure characteristic parameters; finally, uniaxial and triaxial compressive strength of the rock are calculated in combination with the rock failure characteristic parameters and the rock friction coefficient.