Method for preparing proppant in high intensity

A manufacturing method and proppant technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of increasing glass phase, restricting strength, and high energy consumption of grinding powder, so as to reduce raw material costs and energy consumption, Improved chemical stability and reduced product density

Inactive Publication Date: 2006-12-13
关昌烈 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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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 boiled 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 until the particle size is less than 5mm to obtain the main material.

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

[0021] 3) Grinding the above-mentioned mixture until the particle size is less than 300 mesh to obtain co-grinding powder;

[0022] 4) Use the co-grinding powder to form a ball to obtain a green 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, the lower sieve has 30 meshes, and the green balls on the sieve with a particle size greater than 18 meshes are crushed, and then return to step 4) to form balls, and the particle size The green ball under the sieve of less than 30 mesh returns to step 4) into a ball, and the green ball with a particle size of 30 to 18...

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 parts of binder (methyl cellulose), roasting temperature 1350-1400 ° C, roasting time 3 hours, step 8) The thermosetting temperature is 150° C., and the rest are the same as in Example 1. The performance index is shown in Table 1, and the scanning electron microscope picture is shown in 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 parts of binder (polyvinyl alcohol), roasting temperature 1450-1500 ° C, roasting time 1 hour, step 8) heating The solidification temperature is 180°C. All the other are with embodiment 1. The performance index is shown in Table 1, and the scanning electron microscope picture is shown in 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 used in deep oil and gas well fracturing techniques, 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 production. Hydraulic fracturing technology has become the main means of increasing production of oil and gas wells. As an important part of hydraulic fracturing, proppant, as oil and gas wells continue to deepen , the closing pressure is increasing continuously, which puts forward the requirements of high strength and low density for proppant. 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 stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C09K8/02
Inventor 关昌烈关越
Owner 关昌烈
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