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Preparation method of low-density high-intensity film covering ceramic support agent

A high-strength, proppant technology, applied in the field of fracturing proppants, can solve the problems of high crushing rate and high density of ceramsite proppant, and achieve the effects of low crushing rate, low cost and strong flow conductivity

Inactive Publication Date: 2017-01-04
袁春华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problems of high density and high breakage rate of the current ceramsite proppant, the present invention provides a method for preparing a low-density, high-strength film-coated ceramic proppant. Coal gangue with aluminum content, coke gem instead of high alumina bauxite as the raw material of ceramsite proppant, adding potassium feldspar as flux, after crushing and ball milling, fully mixed and then added water to prepare slurry, dropped into liquid nitrogen, solidified and formed , and freeze-dried to obtain spherical green particles with good sphericity and roundness, the spherical green particles were sintered at high temperature, and coated with resin to obtain low-density and high-strength film-coated ceramic proppants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Weigh 10g of coal gangue, 70g of coke gemstones, and 10g of potassium feldspar, add them to the jaw crusher and crush them into granules, transfer them to the pulverizer for crushing, pass through a 200-mesh sieve, mix the sieved powder evenly, and put them into Add 10 mL of absolute ethanol to the ball mill tank, continue ball milling at 300 r / min for 10 h, add 2 g of magnesium oxide, 30 mL of deionized water, and continue ball milling for 10 h to obtain a water-based slurry; add the above-mentioned water-based slurry into a high-speed mixer to Stir at 5000r / min for 30min, drop it into liquid nitrogen, solidify and form, filter to obtain slurry microspheres, put the solidified slurry microspheres into a vacuum freeze-drying oven and dry for 15h to obtain spherical blank particles; Put the above pellets into a resistance furnace, raise the temperature at 5°C / min to 1350°C, keep the temperature for 2 hours, and cool down to room temperature naturally to obtain sintered pe...

example 2

[0019] Weigh 12g of coal gangue, 73g of coke gemstones, and 15g of potassium feldspar respectively, add them to the jaw crusher and crush them into granules, transfer them to the pulverizer for crushing, pass through a 200-mesh sieve, mix the sieved powder evenly, and put Add 15mL of absolute ethanol to the ball mill tank, continue ball milling at 400r / min for 11h, add 2.5g of magnesium oxide, 40mL of deionized water, and continue ball milling for 11h to obtain a water-based slurry; add the above-mentioned water-based slurry into a high-speed mixer, Stir at 5500r / min for 35 minutes, drop it into liquid nitrogen, solidify and form, filter to obtain slurry microspheres, put the solidified slurry microspheres into a vacuum freeze-drying oven and dry for 18 hours to obtain pellets; Put the above pellets into a resistance furnace, raise the temperature to 1380°C at 5°C / min, keep the temperature for 2.5 hours, and cool down to room temperature naturally to obtain sintered granules, p...

example 3

[0022] Weigh 15g of coal gangue, 75g of coke gemstones, and 20g of potassium feldspar respectively, add them to the jaw crusher and crush them into granules, transfer them to the pulverizer for crushing, pass through a 200-mesh sieve, mix the sieved powder evenly, and put it into Add 20 mL of absolute ethanol to the ball milling tank, continue ball milling at 500 r / min for 12 hours, add 3 g of magnesium oxide, 50 mL of deionized water, and continue ball milling for 12 hours to obtain a water-based slurry; add the above-mentioned water-based slurry into a high-speed mixer to Stir at 6000r / min for 40min, drop it into liquid nitrogen, solidify and form, filter to obtain slurry microspheres, put the solidified slurry microspheres into a vacuum freeze-drying oven and dry for 20h to obtain spherical billet particles; Put the above pellets into a resistance furnace, raise the temperature at 5°C / min to 1400°C, keep the temperature for 3 hours, and cool down to room temperature naturall...

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Abstract

The invention relates to a preparation method of a low-density high-intensity film covering ceramic support agent, and belongs to the technical field of fracturing support agents. By aiming the problems of high density and high crushing rate of the existing ceramic particle support agent, the invention provides the preparation method of the low-density high-intensity film covering ceramic support agent. According to the method, coal gangue with low aluminum oxide contents is used; flint clay is used for replacing high-alumina bauxite to be used as raw materials of the ceramic particle support agent; potassium feldspar is added to be used as a fusing assistant; crushing and ball milling are performed; after the sufficient mixing, the water is added to prepare slurry; the slurry is dripped into liquid nitrogen; condensing and forming are performed; freeze drying is performed to prepare ball blank particles with good sphericity and roundness; the ball blank particles are subjected to high-temperature sintering and resin coating; the low-density high-intensity film covering ceramic support agent is prepared. The prepared ceramic support agent has the advantages of low density, high intensity and low crushing rate, and has wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of a low-density and high-strength film-coated ceramic proppant, which belongs to the technical field of fracturing proppant. Background technique [0002] Hydraulic fracturing is an effective measure for oil and gas well stimulation in the oil and gas industry, and its stimulation effect and the economic life of oil and gas wells mainly depend on the quality of the fracturing proppant. Fracturing proppants are spherical particles used to support fractures and pores in hydraulic fracturing to improve reservoir permeability, and are key materials in hydraulic fracturing operations. [0003] Traditional fracturing proppants use quartz sand and ceramsite, etc. Quartz sand has a high volume density, low sphericity, and begins to break under a pressure of 28MPa. Therefore, it is difficult for quartz sand to meet the fracturing operation with a closing pressure of 35 MPa and above. Currently, ceramsite proppant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/132C04B41/83C04B41/84C09K8/80
CPCC04B33/132C04B38/009C04B41/009C04B41/4853C04B41/4905C04B41/83C04B41/84C04B2201/50C04B2235/3206C09K8/805C04B38/0067C04B41/4823C04B41/46Y02P40/60
Inventor 袁春华王龙
Owner 袁春华
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