Jun Qiu

Title: Jun Qiu and His Patent for Acidic-Gas-Switchable Viscoelastic Foam

Introduction

Jun Qiu is an inventor based in Shanghai, China. His work includes a patented viscoelastic foam system designed to improve recovery factors in applications involving acidic gas.

Latest Patents

The supplied information lists 1 patent for Jun Qiu: “Viscoelastic Foam System for Acidic Gas Switch, and Method and Use for Improving the Recovery Factor Using the Same.” The system combines water, a pH-switch surfactant comprising at least one long-chain hydrocarbyl amine, and a hydrocarbyl anionic surfactant. When exposed to acidic gas, the interaction between the surfactants strengthens, increasing viscosity and producing foam with improved stability and plugging performance.

According to the patent description, injecting the system at 1.0 pore volume (PV) produces foam in a rock core with an apparent viscosity of at least 270 mPa·s and can increase the recovery factor by more than 20%. The long-chain hydrocarbyl amine also improves the salt tolerance of the anionic surfactant, extending the system’s applicable mineralization range to 10–200 g/L.

Career Highlights

The supplied career information associates Qiu with China Petroleum & Chemical Corporation and Sinopec (Shanghai) Research Institute of Petrochemical Technology Co., Ltd. His patent focuses on a surfactant-based foam system that responds to acidic gas and is intended to enhance recovery performance.

Collaborations

The listed coworkers are Xiujuan He and Yingcheng Li.

Conclusion

Jun Qiu’s patent describes an acidic-gas-responsive foam technology that combines increased viscosity, foam stability, and salt tolerance to support improved recovery factors.