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Method of preparing low-density well cementation cement check block of oil well by utilizing silicon carbide ceramic microbeads

A cement test block and oil well cementing technology, which is applied in the field of materials to achieve the effects of full reaction, high activity and early strength improvement

Active Publication Date: 2015-03-11
鑫领域智能科技(邳州)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. The needs of oil wells require the use of new technologies, new processes, and new materials to meet the requirements of deep high-pressure, high-temperature oil wells (24-hour pressure 30Mpa, cement slurry density between 0.7 g / cm3~1.5 g / cm3, the hydrostatic pressure resistance of ceramic microbeads is 40Mpa~120 Mpa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028](1) Preparation of silicon carbide closed-cell hollow ceramic microspheres ①Batching and firing: Mix silicon dioxide, phenolic resin and liquid paraffin with a particle size of 1 μm in a weight ratio of 83:10:7 in a mixer, and put them into the kneading mud Machine-made silicon carbide ceramic mud, dried at 60°C for 24 hours, fired at 1500°C in a nitrogen atmosphere for 4 hours, and made block-shaped silicon carbide carbon into 1-3μm round solid microspheres on the spheroidizer, ②Preparation Liquid: The weight percentage composition of silicon carbide slurry is: 1-3μm silicon carbide 60 wt%, water 40 wt%, add light potassium sulfate foaming agent to the silicon carbide slurry, the concentration is 1g / L, ③Stir: Put the well-proportioned silicon carbide solution into the stirrer and stir evenly; ④ Filtration: remove large particles and impurities; Dehydration expansion, drying and sintering, surface melting, ball forming, and wind cleaning and classification to obtain 5-15...

Embodiment 2

[0040] (1) Preparation of silicon carbide closed-cell hollow ceramic microspheres ①Batching and firing: Mix silicon dioxide, phenolic resin and liquid paraffin with a particle size of 2 μm in a weight ratio of 70:20:10 in a mixer, and put them into the kneading mud Machine-made silicon carbide ceramic mud, dried at 80°C for 24 hours, fired at 1550°C in a nitrogen atmosphere for 4 hours, and made block-shaped silicon carbide carbon into 4-6μm round solid microspheres on the spheroidizer, ②Preparation Liquid: The weight percent composition of silicon carbide slurry is: 4-6μm silicon carbide 65 wt%, water 35 wt%, add light potassium sulfate foaming agent to the silicon carbide slurry, the concentration is 2g / L, ③Stir: Put the well-proportioned silicon carbide solution into the stirrer and stir evenly; ④ Filtration: remove large particles and impurities; Dehydration and expansion, drying and sintering, surface melting, ball forming, and wind cleaning and grading to obtain 20-30 μm...

Embodiment 3

[0052] (1) Preparation of silicon carbide closed-cell hollow ceramic microspheres ①Batching and firing: Mix silicon dioxide, phenolic resin and liquid paraffin with a particle size of 3 μm in a weight ratio of 81:14:5 in a mixer, and put them into the kneading mud Machine-made silicon carbide ceramic mud, dried at 110°C for 24 hours, fired at 1600°C in a nitrogen atmosphere for 4 hours, and made block-shaped silicon carbide carbon into 7-10μm round solid microspheres on the spheroidizer, ②Preparation Solution: The weight percent composition of silicon carbide slurry is: 70 wt% of 7-10 μm silicon carbide, 30 wt% of water solution is put into a stirrer and stirred evenly, and light potassium sulfate foaming agent is added to the silicon carbide slurry with a concentration of 3g / L,; ③ Stirring: Put the silicon carbide solution with a good ratio into the stirrer and stir evenly; ④ Filtration: Remove large particles and impurities; After dehydration and expansion in a vertical four...

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Abstract

The invention provides a method for preparing a low-density oil well cementing cement test block by using silicon carbide closed-pore hollow ceramic microbeads, including preparation of silicon carbide closed-cell hollow ceramic microbeads, batching, mixing, stirring and slurry adjustment, mold testing, and strength test , characterized in that: 40-50 wt% of G-grade oil well cement, 10-15 wt% of 13μm superfine cement, 25-35 wt% of closed-cell hollow silicon carbide ceramic microbeads with a particle size of 5-50μm, loss on ignition 1.1% fly ash 5-7 wt%, purity 99.9% calcium oxide 1.5-2 wt%, sodium sulfate 0.5-1.0 wt% and micro-silicon 1-3 wt%, with 0.5-0.6 (W / C) water The ash ratio is stirred in a mixer for 40 seconds, poured into a test mold, cured in a water bath curing box with a constant temperature of 52°C for 24 hours and 48 hours, and soaked in cold water for 1 hour after demoulding, and then conducts a performance test.

Description

technical field [0001] The invention relates to a method for preparing a low-density oil well cementing cement test block by using silicon carbide closed-pore hollow ceramic microspheres, which belongs to the field of material technology. Background technique [0002] At present, the domestic 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B14/36
Inventor 郭志东郭春瑶
Owner 鑫领域智能科技(邳州)有限公司
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