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

A technology of cement test block and oil well cementing, which is applied in the field of materials to achieve the effect of sufficient reaction, high activity and fast hydration reaction

Active Publication Date: 2014-02-26
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 in a nitrogen atmosphere of 1500°C for 4 hours, and made the blocky silicon carbide carbon into 1-3μm round solid microspheres on the spheroidizer, ②Liquor preparation: 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, ③ Stirring: put the proportioned silicon carbide solution into the stirrer and stir evenly; ④ Filtration: remove large particles and impurities; After dehydration and expansion, drying and sintering, surface melting, ball forming, and wind cleaning and classification, 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 in a nitrogen atmosphere of 1550°C for 4 hours, and made the blocky silicon carbide carbon into 4-6μm round solid microspheres on the spheroidizer, ② Liquid preparation: the weight percentage 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, ③ Stirring: put the proportioned silicon carbide solution into the stirrer and stir evenly; ④ Filtration: remove large particles and impurities; After dehydration and expansion, drying and sintering, surface melting, ball forming, and wind cleaning and classification, 20...

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 Mechanically make silicon carbide ceramic mud, dry at 110°C for 24 hours, and fire at 1600°C for 4 hours in a nitrogen atmosphere, and make block silicon carbide carbon into 7-10μm round solid microspheres on the spheroidizer, ② Dosing: 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. The concentration is 3g / L; ③ Stirring: put the proportioned silicon carbide solution into the stirrer and stir evenly; ④ Filtration: remove large particles and impurities; The balls are dehydrated and expanded in a vertical four-zone electric f...

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Abstract

The invention provides a method of preparing a low-density well cementation cement check block of an oil well by utilizing silicon carbide ceramic microbeads. The method comprises the following steps: preparing silicon carbide closed-hole hollow ceramic microbeads; burdening; mixing; stirring and mixing; carrying out mould testing; carrying out a strength test. The method is characterized by specifically comprising the following steps: stirring and mixing 40-50wt% of G-grade well cementation cement, 10-15wt% of 13-micron superfine cement, 25-35wt% of closed-hole silicon carbide ceramic microbeads with the grain size of 5-50 microns, 5-7wt% of coal ash with the loss on ignition 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 micro-silicon in a stirrer for 40 seconds in a micro-silicon of 0.5-0.6(W / C); pouring and carrying out mould testing; maintaining for 24 hours and 48 hours in a water bath maintaining box at a constant temperature of 52 DEG C; soaking for 1 hour in cold water after demoulding and carrying out 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 Applications(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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