Thermal performance testing device for horizontal section of deep U-shaped well

By designing a thermal performance testing device for the horizontal section of a deep U-shaped well, and adopting a high-temperature and high-pressure resistant sealing structure and a detachable grouped rock formation module, high-precision thermal performance testing of the horizontal section of the deep U-shaped well was achieved. This solved the testing problems of existing devices in extreme environments and multi-lithological formations, and provided reliable test data support.

CN122042291APending Publication Date: 2026-05-15NORTHEAST GASOLINEEUM UNIV
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Patent Information

Application Number
CN202610123228.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-29
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Existing testing equipment suffers from problems such as overall deviation, insufficient adaptability to extreme environments, and poor adaptability to multi-lithological formations when testing horizontal sections of deep U-shaped wells, resulting in inaccurate test results and limited applicability.

Method used

A thermal performance testing device for the horizontal section of a deep U-shaped well was designed, including a horizontal section targeted testing component, a surface circulation control component, a path parameter acquisition component, and a data processing and control component. It adopts a high-temperature and high-pressure resistant sealing structure, a detachable grouped rock layer module, and a distributed fiber optic temperature measurement unit to achieve thermal isolation, precise control, and data acquisition.

Benefits of technology

It enables high-precision thermal performance testing in horizontal sections, adapts to deep extreme environments and multi-lithological strata, provides reliable test data support, and improves the accuracy and applicability of test results.

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Abstract

The invention discloses a thermal performance testing device for a horizontal section of a deep U-shaped well, and belongs to the technical field of geothermal energy development and utilization. The device comprises a horizontal section targeting test assembly, a ground circulation regulation and control assembly, an on-way parameter acquisition assembly and a data processing and control assembly, the horizontal section targeting test assembly is embedded in the horizontal section, forms an independent test chamber through a test inner pipe and an end sealing piece, and is provided with a detachable grouped rock stratum module and a visual window; the ground circulation regulation and control assembly regulates and controls the temperature, the flow and the system pressure of circulation fluid. The on-way parameter acquisition assembly adopts a distributed optical fiber temperature measurement unit and an on-way pressure-temperature sensing unit to realize on-way parameter acquisition; and the data processing and control assembly is used for data acquisition, processing display and automatic regulation and control. The problems that an existing device is interfered by heat loss of a vertical well section and is poor in extreme environment adaptability are solved, the multi-lithology adaptation capacity is achieved, and accurate and targeted testing of the thermal performance of the horizontal section of the deep U-shaped well can be achieved.
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