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Waste drilling fluid solid-liquid separation assessment method

A waste drilling fluid, solid-liquid separation technology, applied in the direction of material analysis, material analysis through optical means, instruments, etc., can solve the problems that cannot fully reflect the effect of solid-liquid separation, large amount of waste liquid output, high moisture content of mud cake, etc. , to achieve accurate solid-liquid separation effect

Inactive Publication Date: 2017-04-26
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Measuring the moisture content of mud cake: it can only be used as a factor to reflect the effect of solid-liquid separation, and it cannot completely reflect the effect of solid-liquid separation
The following situations may exist: 1. The wet content of the mud cake is high, and the amount of waste liquid is large

Method used

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Effect test

Embodiment 1

[0026] As a preferred embodiment of the present invention, it discloses a method for evaluating the solid-liquid separation of waste drilling fluid, specifically using a Turbiscan Lab dispersion stability analyzer to evaluate the solid-liquid separation effect of waste drilling fluid, the steps are as follows:

[0027] a. Take a set volume of waste liquid as a sample, and add a gel breaker to the sample;

[0028] b. Stir the sample for 30 minutes;

[0029] c. Take an appropriate amount of sample and put it into a multiple light scattering scanning test tube, and use the Turbiscan Lab dispersion stability analyzer to measure the transmitted light and reflected light curves;

[0030] d. Analyze the solid-liquid separation effect according to the measured transmitted light and reflected light curves.

Embodiment 2

[0032] As the best implementation mode of the present invention, it adopts Turbiscan Lab dispersion stability analyzer to evaluate the solid-liquid separation effect of waste drilling fluid, and the steps are as follows:

[0033] a. Take 400ml of waste liquid and stir for 30 minutes before adding gel breaker. ;

[0034] b. Stir the sample for 30 minutes;

[0035] c. Take 20ml of the sample and put it into the multiple light scattering scanning test tube, and use the Turbiscan Lab dispersion stability analyzer to measure the curve of transmitted light and reflected light;

[0036] The Turbiscan Lab Dispersion Stability Analyzer sets the scanning range to 5mm-75mm, and the scanning time interval is set to 40min;

[0037] d. Analyze the solid-liquid separation effect according to the measured transmitted light and reflected light curves. The specific steps are:

[0038] (1) Analyze the change in particle volume concentration between the supernatant and the lower turbid liquid:...

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Abstract

The invention discloses a waste drilling fluid solid-liquid separation assessment method. The method is characterized in that a Turbiscan Lab dispersion stability analyzer is adopted for assessment of waste drilling fluid solid-liquid separation effects. The method includes steps: a, taking waste fluid in set volume as a sample, and adding a gel breaker into the sample; b, stirring the sample for 30min; c, taking an appropriate amount of the sample, adding into a multiple light scattering scan test tube, and adopting the Turbiscan Lab dispersion stability analyzer for measuring transmission light and reflected light curves; d, analyzing solid-liquid separation effects according to the measured transmission light and reflected light curves. Compared with conventional methods for measuring waste fluid water loss, waste fluid particle diameter, mud cake moisture content and the like, the method has advantages of accuracy of measurement results and comprehensiveness in reflection of supernatant and lower turbid fluid changes in a whole solid-liquid separation process.

Description

technical field [0001] The invention relates to the technical field of oil and gas waste drilling fluid treatment and reuse, in particular to an evaluation method for solid-liquid separation of waste drilling fluid. Background technique [0002] Waste drilling fluid is a stable colloid-suspension system with small particle size and high viscosity, and it is difficult to separate solid and liquid. The main purpose of treating waste drilling fluid is to improve its solid-liquid separation effect, so as to achieve reuse and reduce the harm to the environment. At present, the method of evaluating the solid-liquid separation effect of waste drilling fluid is mainly through measuring the particle size of waste fluid particles, the water loss of waste fluid, and the moisture content of the lower mud cake after solid-liquid separation of waste fluid. [0003] For example, the authors are Li Weiping, Shu Fuchang, Xiang Xingjin and others published a paper titled "Solid-liquid separa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59G01N21/47
CPCG01N21/4738G01N21/59
Inventor 王亮陈海涛王君颜娟何潇潇蒋奕黎聂强勇谢显涛唐润平李俊材
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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