Pressure-maintaining and gas-maintaining coring sample closed transferring and integrated crushing system

Abstract

The invention is suitable for the technical field of gas content and coalbed methane gas content determination, and provides a pressure-maintaining gas-maintaining coring sample closed transfer and integrated crushing system. The system comprises a sample closed transfer device under the pressure-maintaining and gas-maintaining coring process, which can be connected with a closed coring device, and an integrated closed crushing device which can be connected to the sample closed transfer device under the pressure-maintaining and gas-maintaining coring process and is used for crushing a coal core sample, and the closed pushing device is used for pushing the coal core sample into the integrated closed crushing device or the sample transferring device from the sample closed transferring device under the pressure-maintaining and gas-maintaining coring process. The pressure-maintaining and gas-maintaining coring sample closed transferring and integrated crushing system provided by the invention overcomes the problems that gas cannot be maintained and cannot be measured accurately in traditional coal seam sampling, can greatly shorten the testing time, and has a good application effect.

Description

technical field [0001] The invention belongs to the technical field of gas content and coalbed methane gas content determination, and in particular relates to a pressure-maintaining gas-retaining core-taking sample airtight transfer and integrated crushing system and method. Background technique [0002] my country is rich in coal resources. Coalbed methane or coalbed gas is widely present in coal seams as an associated product of coal. Coalbed methane or gas is a kind of high-quality clean energy, and it is also a dangerous substance or source of danger that restricts the safe production of coal mines. Accurate determination of coalbed gas content or coalbed methane gas content is an important basis for gas control and coalbed methane utilization. [0003] There are two methods for measuring the gas content or gas content of coalbed methane, the direct method and the indirect method. The indirect method needs to determine the relevant basic physical and mechanical paramete...

AI Technical Summary

Problems solved by technology

During this process, the sample is directly exposed to the external environment when it is transferred, which will inevitably lead to the escape loss of gas gas, so that the gas content of the coal seam cannot be accurately determined.

Although the conventional sampling process has a high penetration rate and mature technology, the sample is exposed to the wind flow when the coal sample is drilled by the air exhaust, which leads to the escape of part of the desorbed gas during drilling and sampling; and a part of the metered volume comes from At the same time, the sample desorption process lasts for tens of hours to several days, and the whole process test takes a long time (refer to GB / T23250 Coal Seam Gas Content Downhole Direct Measurement Method and GB / T19559 Coal Seam Gas Content gas content determination method)

In some improved airtight coring techniques, although the sampling process reduces the coal sample exposure time, the sample transfer process is still not airtight, and the entire airtight transfer cannot be achieved, and the accuracy of the determination of the coal seam gas content is not high

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