Method for preparing oil well cementing cement briquette with silicon carbide/boron carbide hollow ceramic microbeads

A technology of silicon carbide, boron carbide, and hollow ceramic microspheres, which is applied in the field of materials, can solve problems such as low density, and achieve the effects of low production cost, stable product performance, and fast hydration reaction

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 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028](1) Preparation of silicon carbide closed-cell hollow composite ceramic microbeads ① Batching and firing: Mix silicon carbide with a particle size of 1-4 μm and boron carbide with a particle size of 7-10 μm at a weight ratio of 5wt%: 95 wt% and stir evenly. Add 2 wt% binder PVA to the final silicon carbide and boron carbide ceramic powder, add it to a pressure mold and press it to form a preform, and sinter the preform in a vacuum furnace at 1600°C to obtain a silicon carbide boron carbide base The porous calcined body, and then the silicon carbide boron carbide calcined body is processed into 10-20 μm microspheres in a spheroidizing machine.

[0029] (2) The weight percent composition of silicon carbide and boron carbide slurry is: 60 wt% of 10 μm silicon carbide and boron carbide, and 40 wt% of water.

[0030] (3) Add foaming agent to the silicon carbide boron carbide slurry, which is light calcium carbonate, and the concentration used is 1g / L.

[0031] (4) Fully stir...

Embodiment 2

[0043] (1) Preparation of silicon carbide closed-cell hollow composite ceramic microbeads ①Batching and firing: Mix silicon carbide with a particle size of 5-7μm and boron carbide with a particle size of 1-4μm at a weight ratio of 35wt%: 65wt% and stir evenly. Add 6 wt% binder PVA to the final silicon carbide and boron carbide ceramic powder, add it to a pressure mold and press it to form a preform, and sinter the preform in a vacuum furnace at 1750°C to obtain a silicon carbide boron carbide base The porous calcined body, and then the silicon carbide boron carbide calcined body is processed into 10-20 μm microspheres in a spheroidizing machine.

[0044] (2) The weight percent composition of the silicon carbide and boron carbide slurry is: 65 wt% of 15 μm silicon carbide and boron carbide, and 35 wt% of water.

[0045] (3) Add foaming agent to the silicon carbide boron carbide slurry, which is light calcium carbonate, and the concentration used is 2g / L.

[0046] (4) Fully sti...

Embodiment 3

[0058] (1) Preparation of silicon carbide closed-cell hollow composite ceramic microbeads ① Batching and firing: Mix silicon carbide with a particle size of 7-10 μm and boron carbide with a particle size of 5-7 μm at a weight ratio of 50wt%: 50 wt% and stir evenly. Add 10 wt % binder PVA to the final silicon carbide and boron carbide ceramic powder, add it to a pressure mold and press it to form a preform, and sinter the preform in a vacuum furnace at 1900 ° C to obtain a silicon carbide boron carbide base The porous calcined body, and then the silicon carbide-boron carbide calcined body is processed into 10-20 μm microspheres in a spheroidizing machine.

[0059] (2) The weight percent composition of silicon carbide and boron carbide slurry is: 20 μm silicon carbide boron carbide 70 wt%, water 30 wt%.

[0060] (3) Add foaming agent to the silicon carbide boron carbide slurry, which is light calcium carbonate, and the concentration used is 3g / L.

[0061] (4) Fully stir and fil...

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Abstract

The invention provides a method for preparing an oil well cementing cement briquette with silicon carbide/boron carbide hollow ceramic microbeads. The method comprises preparation of silicon carbide/boron carbide closed-pore hollow composite ceramic microbeads, burdening, mixing, stirring and size mixing, mold testing and strength testing. The method is characterized in that 40-50wt% of grade G oil well cement, 10-15wt% of 13-micron superfine cement, 25-35wt% of silicon carbide/boron carbide composite ceramic microbeads having the grain size ranging from 5 to 50 microns, 5-7wt% of fly ash having the loss on ignition of 1.1%, 1.5-2wt% of calcium oxide having the purity of 99.9%, 0.5-1.0wt% of sodium sulfate and 1-3wt% of micro-silicon are stirred in a stirrer in a water cement ratio ranging from 0.5 to 0.7 (W/C) for size mixing for 40 seconds, next, the mixture is poured into a test mold and maintained in a water-bath curing box at a constant temperature of 52 DEG C for 24 hours or 48 hours, and after being demolded, the obtained material is soaked in cold water for 1 hour, and then the properties of the obtained material are tested.

Description

technical field [0001] The invention relates to a method for preparing an oil well cementing cement test block with silicon carbide boron carbide hollow ceramic microspheres, belonging 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 are when the pulver...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/32C04B35/563C04B35/622
Inventor 郭志东
Owner SHANDONG UNIV OF TECH
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