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Processing and testing device and method of a shale fracture toughness test sample

A fracture toughness and processing device technology, which is applied in the field of processing devices and testing devices for fracture toughness test samples, can solve the problems of difficult steel wires, affecting the accuracy of fracture toughness testing, and the inability to ensure straight saw kerf, etc., to achieve easy processing, high Practical value, easy processing effect

Active Publication Date: 2019-09-24
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When wire saws are used to manually process straight-grooved Brazilian disc specimens, the sawing kerf cannot be kept straight because the steel wires are difficult to control, which will also affect the test accuracy of fracture toughness.

Method used

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  • Processing and testing device and method of a shale fracture toughness test sample
  • Processing and testing device and method of a shale fracture toughness test sample
  • Processing and testing device and method of a shale fracture toughness test sample

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Embodiment Construction

[0049] For further elaborating the technical means and effect that the present invention adopts for reaching the intended purpose of the invention, the present invention will be further elucidated below in conjunction with the accompanying drawings:

[0050] Such as Figure 1-2 As shown, a processing device for a shale fracture toughness test sample, the processing device includes: the processing device includes: the metal plate clamp 1, a wire saw 2, a rubber pad 7;

[0051] Wherein, the two metal plate fixtures 1 are made of steel, and the shape is a quadrangle, and through holes are arranged on the four corners of the quadrangular shape. The two metal plate fixtures 1 are arranged oppositely, and the two metal plate fixtures 1 are opposite Each surface is provided with a rubber pad 7, and the two metal plate clamps 1 are fixedly connected together by a hexagonal nut 3, a hexagonal bolt 4 and a metal washer 5, thereby clamping the shale core sample 6 on the rubber pad 7; th...

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Abstract

The invention relates to a processing and testing apparatus and processing and testing method for a test sample applied to shale fracture toughness testing. The processing apparatus comprises metal plate clampers, a steel wire saw and rubber pads, wherein the steel wire saw blade of the steel wire saw penetrates through the drilling hole at the circle center position of a shale core test sample and the guide groove in the metal plate clamper so as to guide the steel wire saw blade through the guide groove, and the drilling hole at the circle center position of the shale core test sample is processed so as to process the straight cutting groove from the drilling hole, so the straight cutting groove Brazilian disc test sample is processed from the shale core test sample. According to the invention, with the apparatus and the method, the crack of the straight cutting groove test sample is finer so as to well reflect the real situation at the crack front end, which is of important practical significance to improvement of the precision of shale fracture toughness testing.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploration and development, and in particular relates to a processing device, a testing device and a method for a shale fracture toughness test sample. Background technique [0002] In the process of modern shale gas exploitation, hydraulic fracturing technology is mainly used to make shale artificial fractures and natural gas fractures form in the fracture network, so as to collect shale gas resources. Therefore, the experimental test of shale fracture toughness related to fracturing technology is particularly important in shale gas exploitation engineering. Generally, "crack" refers to a crack with a certain length and width and a sharper end. During the development of rock fracture toughness test methods, dozens of different sample types have appeared successively, each with its own advantages and disadvantages. The main test samples are V-shaped notch fracture samples such as 3-point bend...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N3/12G01N3/02
Inventor 朱维耀于俊红韩宏彦吴沛飞卫晨曦尚新春岳明宋智勇杨连枝宋洪庆
Owner UNIV OF SCI & TECH BEIJING
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