Method for manufacturing high temperature resisting and high pressure resisting oil well cementation briquette through silicon bauxite ceramic microbeads

Abstract

A method for manufacturing a high temperature resisting and high pressure resisting oil well cementation briquette through silicon bauxite ceramic microbeads comprises the steps that the silicon bauxite closed-hole hollow ceramic microbeads are manufactured, burdening, mixing, stirring and size mixing are carried out, 55-65wt percent of G-class oil well cement, 25-35wt percent of the silicon bauxite closed-hole hollow ceramic microbeads with the grain size of five microns to 50 microns, five to seven wt percent of pulverized fuel ash with the loss on ignition of 1.1 percent and the grain size of 20 microns to 50 microns, 1.5 to two wt percent of calcium oxide with the purity of 99.9 percent, 0.5-1.0wt percent of sodium sulfate and one to three wt percent of micro-silicon with the grain size of five microns to 20 microns are mixed, size mixing is carried out according to the water cement ratio of 0.5 to 0.7, the mixtures are poured into a set of two briquette molds with the length of 53 mm, the width of 53 mm and the height of 53 mm, are maintained in a water bath maintenance box for 24 hours and 48 hours respectively at the constant temperature of 52 DEG C, and are soaked in cold water for one hour after demolding, and a performance index test is carried out.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature-resistant and high-pressure oil well cementing test block from silica-alumina 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 ...

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Problems solved by technology

[0005] In recent years, due to the influence of haze weather in the north, my country's large and medium-sized thermal power generation adopts environmentally friendly desulfurization technology, and the fly ash does not contain floating beads, causing Due to the tight supply, only small and medium thermal power plants and small boilers supply a small amount of floating beads without desulfurization technology. The shortage of floating beads has caused the price to rise, and the floating beads are impure and mixed with fly ash, which affects the quality of cementing.