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Simulated well experimental device and experimental method for natural gas hydrate drilling sampling

An experimental device and hydrate technology, applied in the direction of sampling device, etc., can solve the problem of no experimental device, etc., and achieve the effect of reducing workload

Inactive Publication Date: 2015-10-07
JILIN UNIV
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However, there is no corresponding experimental device

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  • Simulated well experimental device and experimental method for natural gas hydrate drilling sampling

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Embodiment Construction

[0021] like figure 1 As shown, the natural gas hydrate drilling and sampling simulation well experiment device of the present invention is composed of a surface operating system, a drilling fluid circulation system, a pressure control and monitoring system, and a temperature control and detection system. The storage conditions control the pressure field, temperature field and drilling fluid flow field in the well, and set the initial conditions for the experiment.

[0022] The surface operating system is composed of a drilling tower (1), a winch (2), a faucet (3), a drill pipe (4), an orifice sealing device (5), a gas hydrate sampler (6) and a test hole (7) The hoist (2) is installed on the upper part of the drilling tower (1), and the gas hydrate sampler (6) is placed inside the drill pipe (4) of the test hole (7). At the beginning of the experiment, the hoist (2) drives the drill pipe (4) to lower the gas hydrate sampler (6) into the test hole (7), and then the test starts;...

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Abstract

The invention discloses a simulated well experimental device and an experimental method for natural gas hydrate drilling sampling. The device consists of a surface operation system, a drilling fluid circulating system, a pressure controlling and monitoring system and a temperature controlling and monitoring system, a test well can control a pressure field, a temperature field, and a drilling fluid flow field in the well according to the different hosting conditions of a hydrate to set initial conditions for an experiment. The simulated well experimental device is adopted to control the pressure field, the temperature field, the drilling fluid flow field in the well, and a natural gas hydrate drilling sampling method testing experiment is carried out in a drill hole to study the mechanism of influence of temperature and pressure fields in the drill hole on a natural gas hydrate drilling sampling process. The workload of a field experiment is reduced; the influence of uncontrollability of experimental parameters in the field experiment on the experiment is avoided, and a qualitative and quantitative analysis on each datum can be realized; the influence of the temperature and pressure fields in the drill hole on the natural gas hydrate drilling sampling process can be more favorably analyzed.

Description

technical field [0001] The invention relates to a natural gas hydrate drilling sampling simulation well experiment device, which is especially suitable for testing the influence of the temperature and pressure field in the hole on the natural gas hydrate drilling sampling process. Background technique [0002] Natural gas hydrate produces carbon dioxide and water after combustion. It is a clean energy with abundant reserves. It is also recognized by mankind that it will become an alternative energy source for conventional energy such as coal, oil, and natural gas in the future. Natural gas hydrates form and exist in high-pressure and low-temperature environments. According to the pressure-stabilizing characteristic curve of natural gas hydrate, if the temperature or pressure condition changes beyond the equilibrium condition, it will lead to the decomposition of natural gas hydrate. Therefore, high requirements are put forward for the drilling and coring work. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08
Inventor 贾瑞孙友宏郭威王元陈光华
Owner JILIN UNIV
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