A method of inhibiting the disintegration of red sandstone

A red sandstone, anion technology, applied in chemical instruments and methods, drilling compositions, sampling devices, etc., can solve the problems of safety, complex ratio, volatile, etc., and achieves easy acquisition, low concentration, low The effect of water surface tension

Active Publication Date: 2019-01-22
刘子儒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cooling liquid in this method also has the effect of inhibiting the disintegration of red sandstone, but its ratio is relatively complicated, the price is high, and the active ingredient is ethanol, which has safety problems, and is easy to volatilize in the natural environment

Method used

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  • A method of inhibiting the disintegration of red sandstone
  • A method of inhibiting the disintegration of red sandstone
  • A method of inhibiting the disintegration of red sandstone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Soak the red sandstone in an aqueous solution of 5% anionic surfactant (detergent) by weight, soak for 24 hours, see the disintegration of the red sandstone Figure 5 , the red sandstone soaked by 5% concentration of anionic surfactant (detergent) aqueous solution still disintegrates to some extent, but the situation is better than soaking in pure water.

Embodiment 2

[0036] Soak the red sandstone in an aqueous solution of 10% anionic surfactant (sodium alkyl sulfonate, sodium fatty alcohol ether sulfate) with a concentration of 10% by weight, and soak for 24 hours. The disintegration of the red sandstone is shown in Figure 6 , slightly disintegrated.

Embodiment 3

[0038] Soak the red sandstone in an aqueous solution of an anionic surfactant (active ingredients: sodium alkyl sulfonate, fatty alcohol ether sodium sulfate) with a concentration of 20% by weight, and soak for 24 hours. The disintegration of the red sandstone is shown in Figure 7 , showing basically no disintegration.

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Abstract

The invention discloses a method for inhibiting red sandstone from disintegration when contacting water during core-drilling sampling. In the core-drilling sampling, an anionic surfactant is added into the flushing fluid. The weight percent of the anionic surfactant effective component in the flushing fluid is not lower than 10%, and the optimum concentration is 10-20%. The method can effectively inhibit the red sandstone from disintegration when contacting water in the core drilling process, and is low in cost.

Description

technical field [0001] The invention belongs to the field of geotechnical survey in the civil engineering industry, and in particular relates to a method for inhibiting the disintegration of red sandstone during drilling and sampling. Background technique [0002] The so-called "red sandstone" mainly refers to the continental red rock series from the Jurassic to the Neogene, and the lithology is mudstone, sandstone, argillaceous sandstone, argillaceous siltstone, sandy mudstone, siltstone, etc. "Red bed soft rock". Under natural conditions, the uniaxial compressive strength of red sandstone is low, and it is easy to soften and disintegrate when exposed to air or water. [0003] In civil engineering, in order to understand the foundation bearing capacity of the red sandstone formation, the red sandstone formation is generally sampled by drilling methods in the field, and the red sandstone rock blocks are sampled by drilling methods indoors, and then the samples are tested fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/00G01N1/08
CPCC09K8/00G01N1/08
Inventor 刘子儒
Owner 刘子儒
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