Oil well pipe liquid-solid erosion corrosion starting mechanism prediction method based on micropotential test

• Main Authors: PENG YANG, LIU BING, YAO MINGYUAN, LUO KAIHUAI, ZHOU NIANTAO, LIN YUANHUA, XIE PENGFEI, DENG KUANHAI, YANG MINGQING
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

An oil well pipe liquid-solid erosion corrosion starting mechanism prediction method based on a micro-potential test is characterized in that the correlation between fluid hydrodynamic force and corrosion product film mechanical property is utilized, and on the basis of fracture mechanics and fluid dynamics theories, the liquid-solid erosion corrosion starting mechanism of an oil well pipe is predicted. Hydrodynamic parameters such as wall shear stress, diffusion current density, current noise, freak wave energy density and flow intensity of liquid-solid two-phase fluid of the oil well pipe are tested and represented by combining a micropotential technology, a wavelet analysis method and a hydrodynamic theory; an acoustic emission technology, a nanoindentation technology, a piston suction method and a fracture mechanics theory are used for testing and representing mechanical properties such as breaking strength, membrane-substrate bonding strength and elastic modulus of a typical corrosion product membrane, a