A high-temperature dry hot rock fracturing crack expansion simulation device and its use method

By setting a movable sealing tube and lifting drive mechanism on the outer wall of the simulated fracturing pipe, the problem of the unadjustable position of the simulated fracturing hole was solved, the stable injection of fracturing fluid into the dry hot rock was achieved, and the accuracy and effect of the simulated fracturing were improved.

CN117090546BActive Publication Date: 2025-09-09XINJIANG UNIVERSITY +1
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Patent Information

Application Number
CN202311124447.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-31
Publication Date
2025-09-09
Estimated Expiration
2043-08-31

AI Technical Summary

Technical Problem

In existing hot dry rock fracturing simulation devices, the position of the simulated fracturing holes on the simulated fracturing pipe cannot be adjusted, causing fracturing fluid to spray out from the outside, affecting water pressure imbalance and reducing the accuracy of simulated fracturing.

Method used

A high-temperature dry-hot rock fracturing crack expansion simulation device was designed. By setting a movable sealing tube on the outer wall of the simulated fracturing tube and adjusting the position of the sealing tube using a lifting drive mechanism, the sealing of the simulated fracturing hole inside the dry-hot rock was ensured, and the centralized ejection of the fracturing fluid was achieved.

Benefits of technology

The quality and accuracy of the simulated fracturing experiment are improved, the water pressure of the fracturing fluid in the hot dry rock is ensured to be constant, and the reliability of the simulated fracturing effect is enhanced.

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Abstract

The present invention discloses a high-temperature hot dry rock fracturing crack expansion simulation device and its use method, comprising: a simulated fracturing pipe, the outer wall of which is provided with a plurality of simulated fracturing holes spaced from top to bottom for ejecting fracturing fluid; a simulated transmission pipe, one end of which is fixedly connected to the simulated fracturing pipe and the other end of which is sealed and connected to an external pressure pump; a sealing pipe that can move up and down along the outer wall of the simulated fracturing pipe is movably connected to the outer wall of the simulated fracturing pipe, and a lifting drive mechanism is fixedly connected to the outer wall of the simulated transmission pipe for driving the sealing pipe to rise and fall on the outer wall of the simulated fracturing pipe. The present invention can adjust the opening and closing of the simulated fracturing holes at different positions on the simulated fracturing pipe under the condition of ensuring that the hot dry rock is sealed in the fracturing simulation box, so that the simulated fracturing holes on the simulated fracturing pipe maintain a constant water pressure when injecting water into the hot dry rock, and avoid the fracturing fluid being discharged from the simulated fracturing holes located outside the hot dry rock, resulting in unstable water pressure and affecting the simulated fracturing effect, thereby improving the quality and accuracy of the simulated fracturing experiment.
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