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Method for preparing proppant in high intensity

A manufacturing method and proppant technology, which can be applied to drilling equipment and other directions, can solve the problems of increasing glass phase, restricting strength, and high energy consumption for grinding, reducing raw material cost and energy consumption, improving chemical stability, and reducing product density. Effect

Inactive Publication Date: 2005-10-26
关昌烈 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent law 011086041 discloses a manufacturing method of high-strength ceramsite proppant. The main raw materials are auxiliary materials such as cooked bauxite and clay, lanthanide metal oxides, manganese dioxide, and magnesium oxide. Although the obtained product has high strength, However, due to the use of cooked bauxite as raw material, the cost is high, the energy consumption of grinding is large, the product density is high, and the uniformity of multi-component auxiliary materials is poor, it is difficult to achieve the ideal high-temperature reaction effect, and the product cannot meet the performance requirements of a stress of 86Mpa.
Although the ingredients are simple, and the reaction between manganese dioxide and main ingredients is more complete at high temperature, about 40% of titanium dioxide enters the glass phase during the heating process of bauxite, which not only increases the glass phase, but also affects the mechanical properties of the product
On the other hand, the tetravalent manganese ions in manganese dioxide have a small ionic radius. In addition to easily entering into corundum and solid solution, because the melting point is not very high and the amount added is relatively large, it is easy to form a glass phase with other impurities, thereby greatly restricts the increase in strength

Method used

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  • Method for preparing proppant in high intensity
  • Method for preparing proppant in high intensity
  • Method for preparing proppant in high intensity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Crushing the bauxite raw ore to a particle size of less than 5mm to obtain the main material.

[0020] 2) Mix 100 parts of the above-mentioned main ingredients with 0.5 part of rare earth concentrate, 10 parts of combustibles (charcoal) and 0.05 part of binder (industrial dextrin) for 5 minutes to obtain a mixture.

[0021] 3) grinding the above-mentioned mixture to a particle size of less than 300 meshes to obtain a co-grinding powder;

[0022] 4) The co-grinding powder is used to form a ball with a roundness and a sphericity of 0.9.

[0023] 5) sieve the green balls with a double-layer sieve, the upper sieve has 18 meshes, and the lower sieve has 30 meshes, pulverizes the green balls on the sieve with a particle size larger than 18 meshes, and then returns to step 4) into balls, and the particle size is The blank balls under the sieve smaller than 30 meshes are returned to step 4) to be formed into balls, and the blank balls with a particle size of 30-18 meshes ar...

Embodiment 2

[0028] 100 parts of bauxite raw ore, 3.5 parts of rare earth concentrate, 8 parts of combustibles (carbonized rice husk), 0.03 part of binder (methyl cellulose), roasting temperature of 1350-1400 ° C, roasting time of 3 hours, step 8) The thermosetting temperature was 150°C, and the rest were the same as those in Example 1. The performance indicators are shown in Table 1, and the scanning electron microscope image is shown in Table 1. figure 2 shown.

Embodiment 3

[0030] 100 parts of bauxite raw ore, 5 parts of rare earth concentrate, 5 parts of combustibles (carbonized rice husk), 0.02 part of binder (polyvinyl alcohol), roasting temperature of 1450-1500 ° C, roasting time of 1 hour, step 8) heat The solid temperature is 180°C. The rest are the same as in Example 1. The performance indicators are shown in Table 1, and the scanning electron microscope image is shown in Table 1. image 3 shown.

[0031] Example 1

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Abstract

The present invention provides a preparation method of high-strength proppant. Said method includes the following steps: mixing bauxite raw ore powder, rare earth concentrate, combustible substance and binding agent according to a certain mixing ratio, grinding them into powder material, sphere-forming to obtain blank spheres, screen to obtain semi-finished product spheres, roasting at 1250-1500 deg.C, further screening, polishing, removing dust, finally covering the spheres with phenol-formaldehyde resin so as to obtain finished product. Said invention also provides its application range.

Description

technical field [0001] The invention relates to a method for manufacturing a solid proppant for deep oil and gas well fracturing processes, in particular to a method for manufacturing a high-strength proppant. Background technique [0002] At present, my country's oil and gas wells have entered a period of low permeability and high closure pressure. Hydraulic fracturing technology has become the main means of stimulation of oil and gas wells. As an important part of hydraulic fracturing, proppant is an important part of hydraulic fracturing. With the deepening of oil and gas wells , the closing pressure continues to increase, which puts forward high-strength and low-density requirements for the proppant. Chinese Patent Law 011086041 discloses a manufacturing method of high-strength ceramsite proppant. The main raw materials are slaked bauxite and clay, lanthanide metal oxides, manganese dioxide, magnesium oxide and other auxiliary materials. Although the obtained product has ...

Claims

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Application Information

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IPC IPC(8): C04B35/10
Inventor 关昌烈关越
Owner 关昌烈
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