The invention belongs to the field of drilling well surrounding rock deformation test, especially relates to a test device and method for deformation of
drill holes in a condition with high temperature and
high pressure, and solves the technological problem that deformation of wellhole inner walls cannot be test, when the drilling well surrounding rocks are at high temperature of 600 DEG C and under stress of 250 MPa. The device is composed of a
servo-controlled rock triaxial heating and loading test
system with high temperature and
high pressure and a
drill hole inner wall displacement
optical tracking test
system, so that high precision test of
drill hole surrounding rock deformation in the condition of high temperature and
high pressure is realized. Axial stress, lateral stress, temperature,
axial strain, and
lateral strain of the
drill hole surrounding rocks at different time in the condition which is below the high temperature 600 DEG C and the
high stress 250 MPa as well as deformation displacement of the
drill hole inner wall are obtained. The test device and method has the advantages of high test precision, reasonable apparatus structure and simple test method.