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Method for preparing low-density oil well cementing cement briquette by using glass microsphere

A technology of glass microbeads and cement test blocks is applied in the field of materials to achieve the effects of low production cost, controllable process temperature and stable product performance.

Inactive Publication Date: 2013-12-25
高曰芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, due to the influence of smog weather, my country's large and medium-sized thermal power generation adopts environmentally friendly desulfurization technology, and the fly ash does not contain floating beads, resulting in tight supply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of glass microspheres: ① Proportion: The glass solution uses sodium silicate with a modulus of 3.5 and adds boron oxide, potassium oxide, and lithium oxide. The weight ratio of each component is sodium silicate 94wt% and boron oxide 2.6 wt%. , Potassium oxide 3.0 wt%, Lithium oxide 0.4 wt%; ② Stirring: Put the glass solution with a good ratio into the stirrer and stir evenly; ③ Filtration: Remove large particles and impurities; ④ Firing: The filtered glass solution is passed through The high-pressure pump pressurizes and enters the high-speed spray rotary centrifuge, the centrifuge rotates at 2400 rpm, forms microspheres, enters the four-zone high-temperature furnace, expands through the expansion zone, dehydrates the ball into the ball zone, melts in the sintering zone, and vitrifies the surface of the zone After vitrification, closed-cell hollow microspheres with a particle size of 5-20 μm are selected through airflow classification.

[0028] (2) Densi...

Embodiment 2

[0036] (1) Preparation of glass microspheres: ① Proportion: The glass solution uses sodium silicate with a modulus of 3.7 and adds boron oxide, potassium oxide, and lithium oxide. The weight ratio of each component is sodium silicate 94wt%, boron oxide 2.6 wt% , potassium oxide 3.0 wt%, lithium oxide 0.4 wt%; ] ② Stirring: Put the glass solution with a good ratio into the stirrer and stir evenly; ③ Filtration: Remove large particles and impurities; ④ Firing: The filtered glass liquid is pressurized by a high-pressure pump into a high-speed spray rotary centrifuge, The rotation speed is 2400 rpm, forming microspheres, entering the four-zone high-temperature furnace, expanding through the expansion zone, dehydration in the ball forming zone, melting in the sintering zone, and vitrification on the surface of the vitrification zone. closed-cell hollow microbeads.

[0037] (2) Density 1.2g / cm 3 ~1. 5g / cm 3Oil well cementing cement test block ingredients: 60 wt% of G-grade oil w...

Embodiment 3

[0045] (1) Preparation of glass microspheres: ① Proportion: The glass solution uses sodium silicate with a modulus of 3.9 and adds boron oxide, potassium oxide, and lithium oxide. The weight ratio of each component is sodium silicate 94wt%, boron oxide 2.6 wt% , potassium oxide 3.0 wt%, lithium oxide 0.4 wt%.

[0046] ② Stirring: Put the glass solution with a good ratio into the stirrer and stir evenly; ③ Filtration: Remove large particles and impurities; ④ Firing: The filtered glass liquid is pressurized by a high-pressure pump into a high-speed spray rotary centrifuge, The rotation speed is 2400 rpm, forming microspheres, entering the four-zone high-temperature furnace, expanding through the expansion zone, dehydrating into the ball zone, melting in the sintering zone, vitrification on the surface of the vitrification zone, and selecting a particle size of 60-100 μm through airflow classification closed-cell hollow microbeads.

[0047] (2) Density 1.2g / cm 3 ~1. 5g / cm 3 Oi...

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PUM

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Abstract

The invention provides a method for preparing a low-density oil well cementing cement briquette by using a glass microsphere. The method comprises the steps of preparation of the glass microsphere, blending, mixing, stirring for size mixing, mould testing and strength testing. The method is characterized by comprising the following steps of: stirring the following materials in percentage by weight: 55%-70% of G-grade oil well cement, 20%-35% of closed-pore hollow glass microspheres with the grain diameters of 5-100 micrometers, 5%-7% of coal ash with the ignition loss of 1.1%, 1.5%-2% of calcium oxide with the purity of 99.9%, 0.5%-1.0% of sodium sulfate and 1%-3% of micro-silicon according to the water-cement ratio of 0.5-0.6 (W / C) in a stirrer for size mixing for 40 seconds, and two test molds in one group, wherein length, width and height of each test mold are 53mm, 53mm and 53mm respectively; curing in a water bath curing box at the constant temperature of 52 DEG C for 24 hours and 48 hours; demoulding, and then soaking in cold water for 1 hour for the strength test. According to the invention, the glass microsphere is superior to a floating bead in property.

Description

technical field [0001] The invention relates to a kind of water glass to prepare closed-cell hollow glass microspheres and then prepare low-density 1.2g / cm 3 ~1. 5g / cm 3 The invention relates to a preparation method of an oil well cementing cement test block, which belongs to the technical field of materials. Background technique [0002] At present, the domestic cementing lightening agent uses floating beads in fly ash. Fly ash includes sinking beads and floating beads, 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 holl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/22
Inventor 郭志东
Owner 高曰芬