PetroChina Southwest Oil and Gas Field Company (China)

Numerical Simulation on Descaling Performance of Ultrasonic-Assisted Water Jet Under High Confining Pressure

Severe scale buildup threatens the safe operation of downhole tubing and subsea pipelines under high confining pressure. Conventional descaling methods are less effective in enclosed high-pressure environments, where elevated ambient pressure suppresses ultrasonic cavitation and...

Optimization of Intermittent Defoamer Injection in Foam-Assisted Gas-Well Deliquification: Experimental and Theoretical Investigation

Low-pressure gas wells treated by foam-assisted deliquification often suffer from poor temporal coordination between foamer and defoamer injection, excessive defoamer consumption under continuous dosing, and foam carryover into surface facilities. This study proposes a coordinate...

Nanocellulose-g-poly(2-dimethylamino)ethyl methacrylate foam stabilizer with temperature and pH responsiveness

Stimulus-responsive foam stabilizers are highly desirable for enhanced oil recovery (EOR) applications, yet the development of renewable, dual-responsive systems with controllable performance remains challenging. Herein, we report a series of cellulose nanocrystal-g-poly(2-(dimet...