Hydrate sediment plane interface shear test device and method

By designing a device that can perform interface shear experiments for hydrate deposits under low temperature and high pressure conditions, the problem that the prior art cannot meet the low temperature and high pressure conditions and measure pore pressure and temperature changes is solved, and the precise measurement and description of the mechanical characteristics of the interface between hydrate deposits and structures is achieved.

CN118746503BActive Publication Date: 2025-03-25DALIAN UNIV OF TECH
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Patent Information

Application Number
CN202410914111.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-09
Publication Date
2025-03-25
Estimated Expiration
2044-07-09

AI Technical Summary

Technical Problem

The existing interface shear experimental device cannot conduct interface shear experiments of hydrate sediment under low temperature and high pressure conditions, and it is difficult to measure the pore pressure and temperature changes between hydrate sediment and structural interface, and cannot describe the interaction mechanism between hydrate sediment and structural interface.

Method used

A hydrate sediment plane interface shear experimental device is designed, including a plane interface shear box, torsion and axial loading host, nitrogen gas source, methane gas source, pressure volume controller, water bath device, back pressure valve, air-water separator, gas flowmeter and data acquisition system, which can conduct hydrate sediment interface shear experiments under low temperature and high pressure conditions to accurately measure mechanical characteristics.

Benefits of technology

The shear experiment of hydrate sediment interface under low temperature and high pressure conditions is realized, and the mechanical characteristics between hydrate sediment and structural interface are accurately measured, more accurate experimental data is provided, the diversity of experiments is enriched, and the reliability of experiments is improved.

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Abstract

The present invention discloses a hydrate sediment plane interface shear experimental device and method, which belongs to the field of deep-sea oil and gas development research. The device includes a plane interface shear box, a torsion and axial loading host, a nitrogen gas source, a methane gas source, a pressure volume controller, a water bath device, a back pressure valve, a gas-water separator, a gas flow meter and a data acquisition system; the plane interface shear box includes an upper pressure plate, an upper adapter, an upper heat insulation plate, a pressure head adapter, a lower pressure head, an upper base, a lower base, a lower heat insulation plate, a lower adapter and a lower pressure plate, which are coaxially connected from top to bottom. The sample preparation method of the present invention is simple, and can generate hydrate sediments in situ in the shear box, distribute stress uniformly during shearing, obtain the shear mechanical properties of the interface between the hydrate sediment and the structure, and obtain the residual shear strength of the interface. The experimental data is more accurate and reliable, providing powerful hardware support for exploring the mechanical properties between the interface of the hydrate sediment and the structure.
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