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Method for preparing oil well cementation cement briquette through silica-alumina composite ceramic microbeads

A technology of silica and composite ceramics, applied in the field of materials, to achieve high activity, improve early strength, and advanced technology

Inactive Publication Date: 2014-06-25
广州信浚建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the gradual reduction of oil and gas resources in low-temperature oil wells on land, the development of low-temperature oil wells on land has gradually shifted from low-temperature oil wells on land to deep land and ocean deep layers. Meet the requirements of deep high pressure and high temperature oil wells.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of silica-alumina composite ceramic closed-cell hollow microspheres ① Batching and firing: silica with a particle size of 1-10 μm, alumina with a particle size of 5-20 μm and binder at 92 wt%: 5 wt %: 3 wt% mixed powder, stirred evenly, compacted in a press, dried and formed, fired at 600°C for 10 hours, kept and sintered in a vacuum furnace at 1150°C for 12 hours, and the silica alumina sintered body was spheroidized Machined into 10-20 μm microbeads, ② Liquid preparation: 10-20 μm silica-alumina composite ceramic microbeads 75 wt%: water 25 wt%, add light calcium carbonate foaming agent to the slurry, the concentration is 1g / L, ④ Filtration: Remove large particles and impurities, ⑤ Firing: Use high-pressure spraying and high-speed centrifugal rotary spraying method to form microspheres, dehydrate and expand on a vertical four-zone electric furnace, dry and sinter, surface melt, and form balls. In the four-zone electric furnace, the dehydration expansi...

Embodiment 2

[0044] (1) Preparation of silica-alumina composite ceramic closed-cell hollow microspheres ① Batching and firing: silica with a particle size of 10-20 μm, alumina with a particle size of 20-35 μm and binder at 95 wt%: 3 wt %: 2 wt% mixed powder is stirred evenly, pressed in a press, dried and shaped, fired at 700°C for 10 hours, kept and sintered in a vacuum furnace at 1250°C for 12 hours, and the silica alumina sintered body is spheroidized Machined into 20-30μm microspheres, ② Liquid preparation: 20-30μm silica-alumina composite ceramic microbeads 72 wt%: water 28wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 2g / L, ④ Filtration: Remove large particles and impurities, ⑤ Firing: Use high-pressure spraying and high-speed centrifugal rotary spraying method to form microspheres, dehydrate and expand on a vertical four-zone electric furnace, dry and sinter, surface melt, and form balls. After dehydration and expansion temperature of 820°C, dryi...

Embodiment 3

[0057] (1) Preparation of silica-alumina composite ceramic closed-cell hollow microspheres ①Batching and firing: silica with a particle size of 20-30 μm, alumina with a particle size of 35-50 μm and a binder at 94 wt%: 5 wt %: 1 wt% mixed powder is stirred evenly, compacted in a press, dried and formed, fired at 800°C for 10 hours, kept and sintered in a vacuum furnace at 1350°C for 12 hours, and the silica alumina sintered body is spheroidized Machined into 40-50μm microbeads, ② Liquid preparation: 40-50μm silica-alumina composite ceramic microbeads according to 80 wt%: water 20wt%, add light sodium sulfate foaming agent to the slurry, the concentration is 3g / L, ④ Filtration: Remove large particles and impurities, ⑤ Firing: Use high-pressure spraying and high-speed centrifugal rotary spraying method to form microspheres, dehydrate and expand on a vertical four-zone electric furnace, dry and sinter, surface melt, and form balls. After dehydration and expansion of 850°C in a f...

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Abstract

The invention provides a method for preparing an oil well cementation cement briquette through silica-alumina composite ceramic microbeads. The method comprises the steps of preparing silica-alumina composite ceramic blind-hole hollow microbeads, burdening, mixing, stirring and pulping, pouring a test mold and carrying out a strength test, and concretely comprises the steps of evenly mixing 40-50wt% of G-class oil well cement, 10-15% of superfine cement with the particle size of 13mu m, 25-35wt% of composite ceramic blind-hole hollow microbeads with the particle size of 5-50mum, 5-7wt% of pulverized ash with ignition loss of 1.1%, 1.5-2wt% of calcium oxide with the purity of 99.9%, 0.5-1.0wt% of sodium sulfate and 1-3wt% of silica fume, stirring and pulping for 40 seconds in a stirrer in a water-cement ratio of 0.5-0.6(W / C), pouring the test mold, curing for 24 hours and 48 hours in a water-bath curing box with the constant temperature of 52DEG C, soaking for one hour in cold water after demolding, and performing a performance test.

Description

technical field [0001] The invention relates to a method for preparing an oil well cementing cement test block with silica-alumina composite ceramic microbeads, and belongs to the field of material technology. Background technique [0002] At present, domestic oil well cementing lightening agent uses floating beads in fly ash, including sinking beads and floating beads in fly ash, and the density of sinking beads is 1.1 ~ 2.8g / cm 3 , between, and the content accounts for 30-70% of fly ash. Floating beads are glass beads in fly ash that are less dense than water. Floating beads mainly include aluminosilicate glass beads and porous carbon particles. Floating beads after removing carbon particles It mainly includes thin-walled aluminosilicate glass beads with smooth inner and outer surfaces and large volume. 0.5 to 1% of the total ash, and the aluminosilicate glass microspheres are hollow spheres. [0003] Among them, the floating beads in the fly ash are when the pulverized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/04
Inventor 郭志东
Owner 广州信浚建材科技有限公司
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