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Method for preparing low-density oil well cementing cement block employing zirconia ceramic composite microspheres

A technology of zirconia ceramics and cement test blocks, which is applied in the field of materials, can solve the problems that cannot meet the needs of deep high-temperature oil wells, and achieve the effects of controllable particle size, advanced technology, and high activity

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 traditional cementing material floating beads cannot meet the needs of deep high-temperature oil wells.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of zirconia ceramic composite closed-cell hollow microspheres ①Batching and firing: zirconia powder with a particle size of 1-15 μm, cerium oxide powder with a particle size of 5-20 μm, yttrium oxide powder with a particle size of 1-10 μm, and yttrium oxide powder with a particle size of 5 ~20μm alumina powder and 1~15μm titanium oxide powder are mixed according to the weight ratio of 65wt%: 7wt%: 5wt%: 20wt%: 3wt%, after mixing evenly, add the binder of 1wt% of the mixed powder weight , pressed into a billet, fired at 700°C for 12 hours, and fired at 1500°C for 8 hours to obtain a sintered body of zirconia ceramic composite material, and process the sintered body of zirconia ceramic composite material into 10-15 μm in a spheroidizer Microbeads, ② Liquid preparation: 10-15 μm zirconia ceramic composite microbeads 78wt%: water 22 wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 1g / L ④ Filtration: remove large particles and...

Embodiment 2

[0045] (1) Preparation of zirconia ceramic composite closed-cell hollow microspheres ① Ingredients firing: zirconia powder with a particle size of 20-35 μm, cerium oxide powder with a particle size of 25-40 μm, yttrium oxide powder with a particle size of 15-30 μm, and a particle size of 25 μm ~40μm alumina powder and 20~30μm titanium oxide powder are mixed in a weight ratio of 72wt%: 7wt%: 3wt%: 16wt%: 2wt%. , pressed into a billet, fired at 750°C for 11 hours, and fired at 1600°C for 7 hours to obtain a sintered body of zirconia ceramic composite material, which was processed in a spheroidizer to 20-25 μm Microbeads ② Dosing: 20-25 μm zirconia ceramic composite microbeads 75 wt%: water 25 wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 1.5g / L ④ Filtration: remove large particles and impurities Removal; ⑤ Firing: adopt high-pressure jet high-speed centrifugal rotary spray method to form microspheres, dehydration expansion temperature 820°C, ...

Embodiment 3

[0059] (1) Preparation of zirconia ceramic composite closed-cell hollow microspheres ① Batching and firing: zirconia powder with a particle size of 40-50 μm, cerium oxide powder with a particle size of 45-60 μm, yttrium oxide powder with a particle size of 35-45 μm, and yttrium oxide powder with a particle size of 45 ~60μm alumina powder and 35~45μm titanium oxide powder are mixed in a weight ratio of 75wt%: 5wt%: 4wt%: 15wt%: 1wt%. , pressed into a billet, fired at 800°C for 10 hours, and fired at 1650°C for 6 hours to obtain a sintered body of zirconia ceramic composite material, and process the sintered body of zirconia ceramic composite material in a spheroidizer to 30-35 μm Microbeads, ② Liquid preparation: 30-35 μm ceramic composite microbeads 80 wt%: water 20 wt%, add light potassium sulfate foaming agent to the slurry, the concentration is 2g / L ④ Filtration: remove large particles and impurities; ⑤ Firing: Microspheres are formed by high-pressure spraying and high-spee...

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Abstract

The invention provides a method for preparing a low-density oil well cementing cement block employing zirconia ceramic composite microspheres. The method comprises the following steps: preparing zirconia ceramic composite closed hollow microspheres; preparing materials, mixing, agitating and mixing slurry; testing a mold, and testing the strength; evenly mixing and agitating 40-50wt% of G-grade oil well cement, 10-15wt% of superfine cement of 13mu m, 25-35wtt% of zirconia ceramic composite closed hollow microspheres of which the particle sizes are 5-50mu m, 5-7wt% of coal ash of which the ignition loss is 1.1%, 1.5-2wt% of calcium oxide of which the purity is 99.9%, 0.5-1.0wt% of sodium sulfate, and 1-3wt% of micro-silicon; agitating and mixing inside an agitator at the water-cement ratio of 0.5-0.6 (W / C) for 40 seconds; pouring to test the mold; maintaining inside a water bath maintenance case at constant temperature of 52 DEG C for 24 hours and 48 hours; and soaking in cold water for an hour after demolding, and carrying out a performance test.

Description

technical field [0001] The invention relates to a method for preparing a low-density oil well cementing cement test block with zirconia ceramic composite microspheres, and belongs to the field of material technology. Background technique [0002] At present, 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 , 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. 0.5-1% of the total amount of ash, the aluminosilicate glass microspheres are hollow spheres, and the floating beads in the fly ash are when the coal powder is burn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/02
Inventor 郭志东
Owner SHANDONG UNIV OF TECH
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