Combination valve for corer and pressure maintaining corer

A core taker and combined valve technology, which is applied to the valve device of wellbore/well, the device for extracting undisturbed cores, and the components of wellbore/well, etc., can solve the problems of temperature rise of liquid nitrogen, etc. Easy-to-use effects

Active Publication Date: 2021-10-08
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using liquid nitrogen as the refrigerant, the freezing period is the entire coring process, and the temperature of the liquid nitrogen may rise before entering the third step

Method used

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  • Combination valve for corer and pressure maintaining corer
  • Combination valve for corer and pressure maintaining corer
  • Combination valve for corer and pressure maintaining corer

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Embodiment Construction

[0045] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

[0046] Such as figure 1 , 2 , 3, and 4, the combined valve for the core remover disclosed by the present invention includes a cylindrical valve body 21, the central hole of the valve body 21 constitutes the main channel 20, and at least one shunt channel is provided in the side wall of the valve body 21 , the branch flow channel includes a first flow channel 211 and a second flow channel 212, and a one-way valve core is installed in the second flow channel 212, and the one-way valve core only allows the medium to flow from the first flow channel 211 to the second flow channel 212;

[0047] The inlet of the first flow channel 211 communicates with the main flow channel 20 of the valve body 21, the inlet 213...

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Abstract

The invention relates to a combination valve for a corer and the pressure maintaining corer. The combination valve comprises a cylindrical valve body, a center hole channel of the valve body forms a main flow channel, at least one branch flow channel is arranged in the side wall of the valve body and comprises a first flow channel and a second flow channel, a one-way valve element is arranged in the second flow channel, and the one-way valve core only allows a medium to flow from the first flow channel to the second flow channel; an inlet of the first flow channel is communicated with the main flow channel of the valve body, an inlet of the second flow channel is communicated with the first flow channel, an outlet of the second flow channel is located in the end face of one end of the valve body, and a piston is installed in the first flow channel; and the piston is movable between open and closed conditions. The combination valve is simple in structure, ingenious in design and convenient to use; the pressure maintaining corer is integrated with the combination valve, a center rod triggers the valve during core lifting, water enters an interlayer with agents, and therefore triggering of a chemical reaction is achieved; and the reaction is triggered by utilizing original lifting action of the center rod, so that use is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of coring devices, in particular to a combination valve for a coring device and a pressure-maintaining coring device. Background technique [0002] Gas hydrate is an ice-like crystalline substance distributed in deep sea sediments or permafrost in land areas, formed by natural gas and water under high pressure and low temperature conditions. There are three basic conditions for the formation of combustible ice: temperature, pressure and raw materials. First of all, low temperature: combustible ice is formed at 0-10°C, and will decompose when it exceeds 20°C. The seabed temperature is generally maintained at around 2-4°C; [0003] Second, high pressure: combustible ice can be formed at 0°C only at 30 atmospheres, but with the depth of the ocean, 30 atmospheres is easy to guarantee, and the higher the pressure, the less likely the hydrates will decompose. [0004] Finally, an ample source of gas: organic de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/10E21B25/18E21B34/06
CPCE21B25/10E21B25/18E21B34/06Y02E30/30
Inventor 陈领谢和平高明忠吴年汉胡云起李佳南李聪何志强杨建平
Owner SICHUAN UNIV
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