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Method for preparing oil well cementing cement test block with high compressive resistance quartz ceramic composite microbeads

A technology of quartz ceramic and cement test block, which is applied in the field of materials to achieve the effects of high activity, high compressive strength and controllable particle size

Inactive Publication Date: 2016-04-06
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. Meet the requirements of deep high pressure and high temperature oil wells, the cement slurry density is 1.0g / cm 3 ~1.5g / cm 3 between controllable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of high-pressure quartz ceramic composite closed-cell hollow microspheres ① Ingredients firing: Quartz powder with a particle size of 1-20 μm, zirconia powder with a particle size of 5-20 μm, and silicon nitride powder with a particle size of 5-25 μm by weight Ratio: 70wt%: 10wt%: 20wt% After mixing and stirring evenly, add 3wt% binder in the total weight of the mixed powder, stir evenly in a mixer, press into a billet, dry at 100°C for 12 hours, and heat-preserve and fire at 1650°C for 3 Obtain high-pressure quartz ceramic composite sintered material within hours, and process the sintered body of high-pressure quartz ceramic composite material containing zirconia silicon nitride into 10-15 μm microbeads in a spheroidizing machine, ② Dosing: 10-15 μm containing zirconia nitrogen 70wt% siliconized high-pressure quartz ceramic composite microbeads: 30wt% water, add light potassium sulfate foaming agent to the slurry, the concentration is 1g / L, ③ Filtration:...

Embodiment 2

[0045] (1) Preparation of high-pressure quartz ceramic composite closed-cell hollow microspheres ① Batching and firing: Quartz powder with a particle size of 25-40 μm, zirconia powder with a particle size of 25-35 μm, and silicon nitride powder with a particle size of 30-45 μm by weight Ratio: 75wt%: 15wt%: 10wt% After mixing and stirring evenly, add 4wt% binder in the total weight of the mixed powder, stir evenly in a mixer, press into a billet, dry at 200°C for 11 hours, and heat-preserve and fire at 1600°C for 3.5 The composite sintered material containing high-pressure quartz ceramics is obtained within hours, and the sintered body of the high-pressure quartz ceramic composite material containing zirconia silicon nitride is processed into 20-25 μm microbeads in a spheroidizing machine. ② Liquid preparation: 20-25 μm high-pressure Quartz ceramic composite microbeads 75wt%: water 25wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 1.5g / L, ③ Fi...

Embodiment 3

[0059](1) Preparation of high-pressure quartz ceramic composite closed-cell hollow microspheres ①Batching and firing: Quartz powder with a particle size of 45-60 μm, zirconia powder with a particle size of 40-50 μm, and silicon nitride with a particle size of 50-60 μm by weight ratio : 80wt% : 5wt% : 15wt% After mixing and stirring evenly, add 5wt% binder in the total weight of the mixed powder, stir evenly in a mixer, press into a billet, dry at 300°C for 10 hours, and heat-preserve and fire at 1550°C for 4 hours Obtain high-pressure resistant quartz ceramic composite sintered materials, and process the sintered body of quartz ceramic composite closed-pore hollow microspheres into 30-35 μm microspheres in a spheroidizing machine. 80wt%: water 20wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 2g / L, ③Filtration: remove large particles and impurities; ④Firing: use high-pressure jet high-speed centrifugal rotary spray method to form The microsph...

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PUM

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Abstract

The invention provides a method for preparing a test block of oil well cementing cement with high-pressure-resistant quartz ceramic composite microbeads, which includes preparation of high-pressure-resistant quartz ceramic composite closed-cell hollow microbeads, batching, mixing, stirring and mixing, mold testing, and strength testing. It is characterized in that: 40-50wt% of G-grade oil well cement, 10-15wt% of 13μm ultra-fine cement, 25-35wt% of closed-cell hollow microspheres of high-pressure quartz ceramics with a particle size of 5-50μm, and 1.1% of ignition loss Fly ash 5~7wt%, purity 99.9% calcium oxide 1.5~2wt%, sodium sulfate 0.5~1.0? Wt% and 1-3wt% of micro-silicon are mixed and stirred evenly, and the water-cement ratio of 0.5-0.6 (W / C) is mixed in the mixer for 40 seconds, poured into the test mold, and cured in a water bath curing box with a constant temperature of 52°C 24 hours, 48 ​​hours, soak in cold water for 1 hour after demoulding, and conduct performance tests.

Description

technical field [0001] The invention relates to a method for preparing an oil well cementing cement test block with high-pressure-resistant quartz ceramic composite microbeads, and belongs to the field of material technology. Background technique [0002] At present, the 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 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. The floating beads after removing carbon particles are mainly Including thin-walled aluminosilicate glass beads, smooth inside and outside surfaces, large volume, is a round, light weight, closed-cell hollow, wear-resistant, high temperature resistance, small thermal conductivity, high strength, the amount of floating beads acco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B14/04
Inventor 郭志东
Owner SHANDONG UNIV OF TECH