Visualization device and method for multidirectional observation of hydrate generation and decomposition

A hydrate formation and multi-directional technology, applied in the direction of measuring devices, analysis materials, test crystals, etc., can solve problems such as easy to be covered with a layer of water mist, difficult to control conditions, and affect observation, and meet the requirements of high-precision experiments. Accurately reflect the test temperature and prevent the effect of cooling loss

Active Publication Date: 2017-08-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent has the following defects: 1. Due to the low reaction temperature, the window is easily covered with a layer of water mist, which affects observation; 2. The reaction is carried out under low temperature and high pressure, and the conditions are not easy to control; 3. The hydrate formation cannot be observed in multiple directions and decomposition characteristics; 4. The equipment is relatively expensive and cannot be widely used in the research on the formation...

Method used

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  • Visualization device and method for multidirectional observation of hydrate generation and decomposition
  • Visualization device and method for multidirectional observation of hydrate generation and decomposition
  • Visualization device and method for multidirectional observation of hydrate generation and decomposition

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Embodiment 1

[0055] A visualization device for multi-directional observation of hydrate formation and decomposition, such as figure 1 As shown, it includes a low temperature and constant temperature control system, a normal pressure visual reaction device 7, a temperature acquisition instrument and a CCD imaging system;

[0056] The low temperature and constant temperature control system is a low temperature constant temperature tank 1, which is connected to the circulating fluid inlet 9 and the circulating fluid outlet 10 through the rubber pipeline 2, and the surface of the rubber pipeline 2 is wrapped with a layer of foam insulation tube.

[0057] The normal pressure visualization reaction device 7 includes a temperature-controlled circulation tank 15, a reaction tank 12, a circulating fluid inlet 9, and a circulating fluid outlet 10. The temperature-controlled circulating tank 15 is provided with a reaction tank 12, and the tank wall of the temperature-controlled circulating tank 15 is ...

Embodiment 2

[0063] The atmospheric pressure visualization reaction device described in Example 1 realizes the method of multi-directional observation of hydrate formation and decomposition characteristics, including the following steps:

[0064] (1) Wash and dry the reaction tank 12 repeatedly with absolute ethanol, inject cyclopentane into the reaction tank 12, and put the probe 4 in the reaction tank 12;

[0065] (2) Turn on the low temperature constant temperature tank 1 to the temperature T 1 , -10℃1 2 , get the temperature difference C=T 2 -T 1 ;

[0066] (3) Repeat the operation step (2) 3 times or more to obtain the average value of the temperature difference C

[0067] (4) Adjust the low temperature constant temperature tank 1 to the set temperature Keep for a period of time until the temperature T in the reaction tank 12 3 Satisfy 0℃3 When <1°C, add ice particles to the reaction tank 12 to induce cyclopentane hydrate;

[0068] (5) Adjust the temperature of low temperatur...

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Abstract

The invention relates to a visualization device and method for multidirectional observation of hydrate generation and decomposition. The visualization device comprises a low-temperature constant-temperature control system, a normal-pressure visualization reaction device, a temperature acquisition apparatus and a CCD imaging system, wherein the normal-pressure visualization reaction device comprises a temperature control circulating tank, a reaction tank, a circulating liquid inlet and a circulating liquid outlet; the reaction tank is arranged in the temperature control circulating tank; the tank wall of the temperature control circulating tank is communicated with the circulating liquid inlet and the circulating liquid outlet; a two-layer organic glass window is arranged on one side tank wall of the reaction tank, and comprises an observation window and an organic glass window in turn from inside to outside; the observation window and the organic glass window are both made of organic glass. According to the visualization device and method provided by the invention, the two-layer organic glass window is adopted, and is totally closed inside, air is dry, and the heat conductivity is low; the temperature of the outer-layer organic glass is close to room temperature, and the problem of water mist is solved.

Description

technical field [0001] The invention relates to a visualization device and method for multi-directional observation of hydrate formation and decomposition, and belongs to the technical field of oil and gas exploitation scientific research instruments. Background technique [0002] Gas hydrate is a solid crystal of water molecules in a cage structure. The structural cavities made up of water molecules are filled by small molecules that act to stabilize the crystal lattice. Small molecules include hydrocarbons with small relative molecular masses, such as methane, ethane, propane, as well as hydrogen and carbon dioxide. In the development of deep-water gas fields, the gathering and transportation pipeline generally adopts a mixed transportation process. There is free water in the pipeline, and at the same time, the pressure in the pipeline is high, and the temperature of the seabed environment is low, so hydrates are easily formed in the pipeline. The harm of hydrate is main...

Claims

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Application Information

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IPC IPC(8): G01N21/84
CPCG01N21/84G01N2021/8477
Inventor 李明忠刘陈伟李波锋武永吉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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