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System for testing friction resistance of carbon dioxide anhydrous fracturing fluid

A technology of anhydrous fracturing fluid and carbon dioxide, applied in the direction of measuring devices, flow characteristics, instruments, etc., to achieve the effect of preventing heat transfer

Inactive Publication Date: 2015-09-02
HUANENG CLEAN ENERGY RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing instruments for testing properties such as fracturing fluid friction are mainly aimed at the friction characteristics of conventional liquid fracturing fluids, such as jelly fracturing fluids, or clear water fracturing fluids, such as specifically testing this gas fracturing fluid There are no devices with friction characteristics on the market

Method used

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  • System for testing friction resistance of carbon dioxide anhydrous fracturing fluid

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] As shown in the accompanying drawings, the present invention includes a first gas cylinder 1 and a second gas cylinder 2. After the gas from the first gas cylinder 1 and the second gas cylinder 2 passes through the first valve 3 and the second valve 4 respectively, it passes through the purifier 5 After purification, flow is measured by flow meter 6. Then the carbon dioxide is refrigerated and liquefied by the refrigeration unit 7 2 Pump 13 enters the pipeline.

[0029] Wherein the refrigerating device 7 is connected with a third valve 9 and a fourth valve 10 to facilitate emptying and cleaning. Manometer 12 can measure liquid CO 2 internal pressure of the tank.

[0030] Another branch: put the prepared chemical reagent into the reagent tank 14 with appropriate solvent, and the reagent is input into the pipeline and CO by the reagent pump 15 2 mix. CO 2...

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Abstract

The invention provides a system for testing the friction resistance of a carbon dioxide anhydrous fracturing fluid, and specifically provides a device for especially testing the friction resistance of the carbon dioxide anhydrous fracturing fluid at different temperatures and under different pressures. The system is also applicable to testing the rheological properties of a carbon dioxide dry fracturing fluid at different temperatures and under different pressures; firstly, the CO2 gas is refrigerated and liquefied; next, the liquefied CO2 is injected into a pipeline by use of a CO2 pump under a high pressure and mixed with a reagent injected by use of a reagent pump to form the carbon dioxide anhydrous fracturing fluid; the frequency and the proportion can be adjusted according to requirements, and meanwhile, the fracturing fluid in the pipeline can be heated to a desired temperature by use of a preheater and then discharged via a thin straight pipe or a thick straight pipe or a coiled pipe selected flexibly by use of a valve; the pressure of the pipeline system is adjusted by use of a back pressure valve; a recovery treatment device is connected to the outlet of the pipeline; meanwhile, the pressure difference between the two ends of the straight pipe or the coiled pipe is measured by use of a differential pressure sensor, and the differential pressure value is the friction resistance value to be measured; in addition, the rheological properties are measured according to a thin-tube pheometer principle.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide anhydrous fracturing, in particular to a carbon dioxide anhydrous fracturing fluid friction test system. Background technique [0002] In recent years, a new fracturing technology—carbon dioxide anhydrous fracturing technology has gradually become popular, and more and more people have begun to study it. Carbon dioxide anhydrous fracturing fluid is mainly composed of carbon dioxide and a small amount of chemical reagents. However, the existing instruments for testing properties such as fracturing fluid friction are mainly aimed at the friction characteristics of conventional liquid fracturing fluids, such as jelly fracturing fluids, or clear water fracturing fluids, such as specifically testing this gas fracturing fluid Equipment with unique frictional resistance characteristics is not yet on the market. Contents of the invention [0003] In order to overcome the above-mentioned problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00
Inventor 张健郜时旺张国祥杨光荆铁亚王金意周伟强
Owner HUANENG CLEAN ENERGY RES INST
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