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Method for preparing oil well cement test block by utilizing silicon oxynitride ceramic composite microspheres

A ceramic composite and silicon oxynitride technology, applied in the field of materials, can solve the problem that cementing material float beads cannot meet the requirements of deep high temperature oil wells, etc., and achieve the effects of increasing suspension stability, low production cost and advanced technology.

Inactive Publication Date: 2014-05-21
SHANDONG UNIV OF TECH
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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. The traditional cementing material floating beads cannot meet the needs of deep high-temperature oil wells. 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 silicon oxynitride ceramic composite closed-cell hollow microspheres, ①Batching and firing: 5-15μm silicon dioxide, 1-20μm silicon carbide, 5-15μm silicon nitride, and 10μm particle size ~25μm alumina according to the weight ratio 75wt%: 10wt%: 10wt%: 5wt% mixed powder, stir evenly, then add binder polyvinyl alcohol solution, sodium lignosulfonate solution and dextrin according to the above mixed powder The weight ratio is 1 wt%: 2 wt%: 0.2 wt%. Stir evenly and briquette in a press, dry and shape at low temperature, and heat-preserve and sinter in a furnace at 1120°C for 12 hours. The silicon oxynitride ceramic composite sintered body is processed into 10-20 μm microbeads, ② liquid preparation: 10-20 μm silicon oxynitride ceramic composite micro-beads 75 wt%: water 25 wt%, add light calcium carbonate foaming agent to the slurry, the concentration is 1g / L, ④ filter : Remove large particles and impurities, ⑤ Firing: Use high-pressure spraying and high-s...

Embodiment 2

[0044] (1) Preparation of silicon oxynitride ceramic composite closed-cell hollow microspheres ① Batching firing: silicon dioxide with a particle size of 20-35 μm, silicon carbide with a particle size of 25-40 μm, silicon nitride with a particle size of 20-35 μm, and 30~45μm alumina according to the weight ratio 78wt%: 12wt%: 8wt%: 2wt% Mix the powder and stir evenly, then add the binder polyvinyl alcohol solution, sodium lignosulfonate solution and dextrin and mix as above The total weight ratio of powder is 1.2wt%: 3wt%: 0.5wt%. Stir evenly and briquette in a press, dry and shape at low temperature, and sinter in a furnace at 1300°C for 11 hours. Processed into 20-30μm microbeads, ② Liquid preparation: 20-30μm silicon oxynitride ceramic composite core microbeads 72 wt%: water 28wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 1.5g / L , ④ Filtration: Remove large particles and impurities, ⑤ Firing: Use high-pressure spraying and high-speed cen...

Embodiment 3

[0057] (1) Preparation of silicon oxynitride ceramic composite closed-cell hollow microspheres ①Batching and firing: silicon dioxide with a particle size of 40-50 μm, silicon carbide with a particle size of 45-60 μm, silicon nitride with a particle size of 40-50 μm, and 50~60μm alumina according to the weight ratio 80wt%: 10wt%: 7wt%: 3wt% mixed powder, stir evenly, then add binder polyvinyl alcohol solution, sodium lignosulfonate solution and dextrin according to the above mixed powder The weight ratio is 1.5 wt%: 4 wt%: 0.8 wt%. Stir evenly and briquette in a press, dry and shape at low temperature, heat and sinter in a furnace at 1450°C for 10 hours, and process the silicon oxynitride ceramic composite sintered body in a spheroidizing machine. 40-50 μm microbeads, ② liquid preparation: 40-50 μm silicon oxynitride ceramic composite micro-beads according to 80 wt%: water 20wt%, add light sodium sulfate foaming agent to the slurry, the concentration is 2g / L, ④ filter : Remove ...

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Abstract

The invention provides a method for preparing an oil well cement test block by utilizing silicon oxynitride ceramic composite microspheres. The method comprises the following steps: preparing silicon oxynitride ceramic composite obturator hollow microspheres, compounding, mixing, performing stirring and size mixing, performing mold testing and performing strength testing; uniformly mixing and stirring 40 to 50 percent by weight of G-grade oil well cement, 10 to 15 percent by weight of 13-micrometer ultrafine cement, 25 to 35 percent by weight of silicon oxynitride ceramic composite obturator hollow microspheres with the granularity of 5 to 50 micrometers, 5 to 7 percent by weight of coal ash with the burning loss of 1.1 percent, 1.5 to 2 percent by weight of calcium oxide with the purity of 99.9 percent, 0.5 to 1.0 percent by weight of sodium sulfate and 1 to 3 percent by weight of silica fume, stirring and mixing the raw materials for 40 seconds inside a stirring machine with the water-ash ratio of 0.5 to 0.6 (W / C), then pouring the mixture into a test mold, conserving for 24-48 hours in a water-bath maintenance box at a constant temperature of 52 DEG C, immersing the demolded mixture in cold water for 1 hour, and finally performing the performance test on the mixture.

Description

technical field [0001] The invention relates to a method for preparing an oil well cementing cement test block with silicon oxynitride ceramic composite microbeads, belonging 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 pulverize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/02
Inventor 郭志东
Owner SHANDONG UNIV OF TECH
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