Pressure chamber for in-situ generation and triaxial test of marine gas hydrate and using method thereof

An in-situ generation, triaxial experiment technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problem that it is difficult to apply hydrate in-situ generation and triaxial experiments, and cannot achieve horizontal gas. Infiltration, long hydrate synthesis time and other problems, to achieve the effect of improving temperature uniformity and temperature control efficiency, wide practicability, and simple structure

Active Publication Date: 2019-01-11
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] The existing in-situ hydrate formation and triaxial experimental devices are mainly aimed at solid samples, which are ventilated in the vertical direction, the hydrate synthesis time is long, and the synthesized hydrates are unevenly distributed in the height direction of the sample
Application No. 201410112371.9 discloses "A Hollow...

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  • Pressure chamber for in-situ generation and triaxial test of marine gas hydrate and using method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

[0024] The pressure chamber for the in-situ formation of sea hydrate and the triaxial experiment of the present invention mainly consists of a base 1, a sleeve 2 and a piston rod 4. The sleeve 2 includes a pressure chamber 6 from the inside to the outside, a refrigerant circulation Cavity 7 and insulation layer 8; the base 1 and the sleeve 2 are sealed by bolts 22 and sealing rings 23, the bottom surface of the base 1 is provided with an insulation layer 19, and the base 1 is provided with a The sleeve 2 and the temperature sensor 20 connected to the signal wire 18 in the hollow cylindrical sample 10 . The upper and lower fixing blocks for fixing the hollow cylindrical sample 10 are arranged inside the sleeve 2. The upper fixing block includes an upper connecting block 26, an upper main spacer 27 that is buckled stepwise with the upper connecting bloc...

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Abstract

The invention discloses a pressure chamber for in-situ generation and triaxial test of marine gas hydrates and a using method thereof. The pressure chamber is composed of a base, a sleeve and a pistonrod. The sleeve is sequentially provided with a pressure bearing cavity, a refrigerant circulation cavity with rib edges and a heat preservation layer from inside to outside, and a refrigerant circulation pipeline is arranged on the sleeve. A pore pressure applying pipeline, a confining pressure applying pipeline and an air pressure applying pipeline are arranged on the base, and an insulating heat preservation layer is arranged on the surface of the lower bottom of the base. The using method comprises the following steps of: sequentially installing upper and lower main cushion blocks, upperand lower connection blocks, copper wire meshes, latex films, latex sleeves and hollow cylinder specimens on the base; and sequentially applying pore water pressure, inner and outer confining pressureand the pore air pressure to the hollow specimens until the hydrates are formed inside the specimens. The pressure chamber can provide platform support for the in-situ generation and the triaxial test of the marine gas hydrates under the conditions of gas horizontal migration.

Description

technical field [0001] The invention relates to a triaxial experimental pressure chamber and a using method thereof, in particular to a triaxial experimental pressure chamber suitable for the in-situ generation of hydrates in sea areas under the condition of gas horizontal migration and the using method thereof. Background technique [0002] Natural gas hydrate, also known as combustible ice, is an ice-state crystalline clathrate compound formed by water and natural gas in a high-pressure and low-temperature environment. Natural gas hydrate is a huge efficient and clean energy, and its reserves are about 2×10 16 m 3 , and its carbon content is about twice the total carbon content of the earth's fossil energy (oil, natural gas and coal). Gas hydrates mainly occur in the sediments of deep-sea continental slopes, continental uplifts and basins. [0003] Existing mining methods are mostly based on destroying reservoir phase equilibrium conditions: reducing pressure and increa...

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Application Information

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IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0256
Inventor 赵晓东庄昇烨吕志远张杰田秋红
Owner CHINA UNIV OF MINING & TECH
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