A self-repair testing device and method for oil well cement

Abstract

The invention discloses a self-repair testing device for oil well cement, which comprises: a slurry cup for accommodating the cement block to be tested; a heating unit for heating the cement block to be tested in the slurry cup to a predetermined temperature; a pressurized liquid supply unit for injecting fluid into the slurry cup at a predetermined pressure; and a monitoring unit for collecting flow parameters of the fluid in real time. The invention also discloses a cement self-repair testing method using an oil well cement self-repair test device. The testing equipment of the present invention can simulate high-temperature and high-pressure environment, and monitor the change of the flow rate of the fluid passing through the cement stone crack in real time to reflect the change of the size of the crack and further reflect the healing state of the cement stone. At the same time, the test equipment of the present invention can collect data through a computer, and automatically observe and record the change of the flow rate with time in real time, so that the researchers can directly obtain the recorded result data, which reduces the workload of the researchers.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to an oil well cement self-repair testing device and method. Background technique [0002] With the advancement of science and technology, self-healing repair technology has been applied in more and more fields. At the present stage, the application of self-healing repair technology in cement is still a new research field, and the research on the application of cement with self-healing repair technology has just started. [0003] The cement stone added with self-healing materials can realize self-sealing repair after being swelled by oil and gas. In the research process, in order to accurately grasp the self-healing state process of cement stone, it is necessary to make detailed measurement records for the self-healing process. However, in the current research, the test and evaluation of the self-healing process of cement mainly rely on the expansion test device of cement stone or the n...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that existing devices cannot monitor the self-repairing process of cement under high temperature and high pressure, the present invention provides a self-repairing test device for oil well cement, which includes:

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