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Coal and rock bore hydraulic fracture experimental apparatus

A technology of hydraulic fracturing and experimental device, which is used in safety devices, earthwork drilling, material inspection products, etc., to achieve the effect of increasing experimental cost, good simulation effect and preventing loosening

Inactive Publication Date: 2013-06-12
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no experimental device capable of simulating the hydraulic fracturing of coal and rock drilling

Method used

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  • Coal and rock bore hydraulic fracture experimental apparatus
  • Coal and rock bore hydraulic fracture experimental apparatus
  • Coal and rock bore hydraulic fracture experimental apparatus

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Such as figure 1 and figure 2 As shown, the coal rock drilling hydraulic fracturing experiment device of the present invention includes a sample device system, a confining pressure system, a fracturing system, a sealing system and a monitoring system.

[0019] The sample device system includes a sample cylinder 18, a sieve cylinder 9 is provided at the bottom of the sample cylinder 18, and a water outlet pipe 9A is provided at the bottom of the sieve cylinder 9. The sample cylinder 18 above the sieve cylinder 9 is filled with a sample 7, and a simulated drilling hole 7A is arranged in the sample 7.

[0020] The confining pressure system includes an air-filling subsystem and a water-filling subsystem. The air-filling subsystem includes a high-pressure air pump 1 and an experimental cylinder 8. A support base 10 is provided at the bottom of the experimental cylinder 8. The upper part is connected, the inlet of the high-pressure air pump 1 is connected with the air stor...

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Abstract

The invention discloses a coal and rock bore hydraulic fracture experimental apparatus, which comprises a sample device system, a confining pressure system, a fracture system, a sealing system and a monitoring system, wherein the sample device system comprises a sample cylinder, the bottom in the sample cylinder is provided with a screen drum of which the bottom is provided with a water outlet pipe, a sample is accommodated in the sample cylinder above the screen drum, and a simulated bore is formed in the sample; the confining pressure system comprises an air filling subsystem and a water filling subsystem; the fracture system comprises a fracture high-pressure water pump of which a water outlet is communicated with the simulated bore through a fracture pipeline; the sealing system comprises a sample cylinder sealing device and an experimental cylinder sealing device; and the monitoring system comprises an acoustic emission sensor arranged on an external wall of the sample cylinder. By the coal and rock bore hydraulic fracture experimental apparatus, a simulated experiment can be performed in a laboratory to investigate the change rules of crack initiation, expansion and extension in the hydraulic fracture process of a coal mine underground coal seam bore, and know a crack extending direction so as to guide field fracture; therefore, the fracture effect is greatly improved.

Description

technical field [0001] The invention relates to a coal rock drilling hydraulic fracturing experiment device. Background technique [0002] The "low permeability" characteristics of my country's coal reservoirs determine that underground gas control or surface coalbed methane development requires reconstruction of coal reservoirs. Hydraulic fracturing is one of the important means for surface development of coalbed methane wells or underground gas control. The quality of the hydraulic fracturing design of surface coalbed methane wells is directly related to the level of gas production in the later stage, and the identification of fracture initiation, expansion, and extension changes during hydraulic fracturing is the basis for optimizing hydraulic fracturing parameters. Finding out the law of fracture initiation, expansion and extension during downhole hydraulic fracturing is the basis for optimizing drilling parameters and hydraulic fracturing parameters. The more fully the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21F7/00C04B28/04C04B28/06
CPCG01N33/24
Inventor 倪小明苏现波贾炳刘晓朱明阳
Owner HENAN POLYTECHNIC UNIV
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