The invention relates to a
cement sheath
structural integrity mechanics experiment device which is composed of a
cement sheath maintenance die and a three-shaft stress maintenance kettle. The
cement sheath maintenance die is arranged inside an inner cavity of the three-shaft stress maintenance kettle. The
cement sheath maintenance die comprises an adjustable eccentricity upper
flange cover, a
simulation well wall, a
simulation well wall outer protective
barrel, a casing
pipe and an adjustable eccentricity lower
flange plate. The three-shaft stress maintenance kettle comprises a
barrel-shaped container, a confining pressure oil cylinder, an oil cylinder
piston, an
axial load piston, a confining pressure
piston, an annular
heating element and an
electrode. The confining pressure piston is arranged inside the
barrel-shaped container, the confining pressure oil cylinder is arranged on the upper end face of the barrel-shaped container in a sitting mode, a
silicone oil cavity is formed between the confining pressure oil cylinder and the oil cylinder piston, an
axial load sensor is connected with the
axial load piston, a pressing
machine upper plate is arranged at the upper end of the axial load sensor, the annular
heating element is arranged inside the barrels-shaped container, the lower end face of the annular
heating element presses the
electrode, and the annular heating element is connected with a thermoelectric coupler. The
cement sheath structural integrity mechanics experiment device can simulate the actual working condition of the oil-gas well construction, and the measured cement strength of a cement interface conforms to the actual site work better and more accurately.