Under water heat-injection natural-gas aqua-compound exploration apparatus

A gas hydrate and natural technology, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of high frictional resistance of pipelines, lack of relatively perfect natural gas hydrate heat injection recovery technology, high pump power, etc. , to achieve the effect of eliminating heat loss along the way

Inactive Publication Date: 2006-05-24
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous idea was to inject heat from the offshore platform. However, this method has the following obvious disadvantages: (1) The heat loss along the way is very large; (2) The pressure of the hot water needs to be raised from the atmospheric pressure to the location of the hydrate reservoir. pressure, resulting in high pump work; (3) pipeline friction resistance is large
Therefore, there is no relatively perfect natural gas hydrate heat injection recovery technology at present.

Method used

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  • Under water heat-injection natural-gas aqua-compound exploration apparatus
  • Under water heat-injection natural-gas aqua-compound exploration apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] use figure 1 The device shown uses CO 2 It is a refrigerant, which absorbs heat from seawater at about 5 degrees on the seabed, and evaporates the refrigerant in the evaporator 2, and the temperature of the refrigerant in the evaporator is between 0 and 5 degrees. According to the temperature sensed by the temperature sensor 9, the frequency and voltage supplied to the booster pump 6 are adjusted to control the outlet water temperature of the condenser 3 to 75°C, and the COP of the heat pump system reaches 4 or more.

Embodiment 2

[0023] use figure 1 The device shown uses CO 2 It is a refrigerant, which absorbs heat from seawater at about 5 degrees on the seabed, and evaporates the refrigerant in the evaporator 2, and the temperature of the refrigerant in the evaporator is between 0 and 5 degrees. According to the temperature sensed by the temperature sensor 9, the frequency and voltage supplied to the booster pump 6 are adjusted to control the outlet water temperature of the condenser 3 to 90°C, and the COP of the heat pump system reaches 3 or more.

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Abstract

This invention discloses a natural gas hydrate underwater heat injection exploitation device, which contains compressor, evaporator, condenser, expansion valve, booster pump, flooding duct, wherein the compressor, evaporator, condenser and expansion valve combined a heat pump, by which absorbing heat from sea water at about 5 degree centigrade, vaporizing refrigerant in evaporator, entering compressor to boost pressure entering condenser to release heat to heat sea water, the heated water pressured by booster pump, entering exploitation sleeve and added with hydrate layer for decomposition of hydrate. Said invention can be used in sea bed with high thermal efficiency.

Description

【Technical field】 [0001] The invention relates to natural gas hydrate exploitation technology, in particular to an underwater heat injection exploitation device for natural gas hydrate. 【technical background】 [0002] Natural gas hydrate is mainly stored in the ocean, and it is a white solid crystalline substance formed by the interaction between natural gas and water under low temperature and high pressure conditions. Due to the characteristics of natural gas hydrate, its mining method is different from the development of conventional energy sources (such as coal, oil, natural gas, etc.). For example, coal is solid underground, and because of its small storage depth, it can be directly mined in solid state, that is, it is still solid after mining; oil is stored at a large depth, but because oil is a fluid underground, it can be mined in liquid form. Mined, still fluid after mining. Different from coal and oil, gas hydrate is buried in solid form at the bottom of the ocean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24
Inventor 冯自平黄冲肖睿何世辉唐良广
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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