Pengfei Zhao

Title: Pengfei Zhao and a Method for Evaluating Rock Compressive Strength

Introduction

Pengfei Zhao is an inventor based in Chengdu, China, associated with Southwest Petroleum University. His patent work addresses methods for assessing rock properties relevant to petroleum and natural gas exploration and development.

Latest Patents

Zhao is associated with 1 patent: “Method for Evaluating Rock Compressive Strength Based on Cuttings Mineral Composition, Nano-Indentation, and Friction Tests.” The method combines measurements of mineral composition, nano-indentation behavior, and rock friction to estimate compressive strength.

The disclosed approach first uses X-ray diffraction, nano-indentation experiments, and friction tests to obtain mineral proportions, indentation crack lengths and load-displacement curves, and the rock’s friction coefficient. It then applies energy-conservation principles to calculate mineral elastic moduli and plane-strain fracture toughness. Mineral parameters are weighted according to their proportions to derive rock failure characteristics, which are combined with the friction coefficient to calculate uniaxial and triaxial compressive strength.

Career Highlights

The patent reflects work at the intersection of rock mechanics, materials testing, and petroleum engineering. By integrating several experimental measurements, the method offers a framework for estimating rock strength from cuttings and related test data.

Collaborations

The provided information identifies Qiangui Zhang and Xiangyu Fan as Zhao’s coworkers. No further details about their roles in the patent are specified.

Conclusion

Pengfei Zhao’s patent presents an integrated approach to evaluating rock compressive strength, connecting mineral composition and laboratory measurements with applications in petroleum and natural gas exploration and development.