Method for manufacturing high temperature and high pressure resisting oil well cementing test block through silicon kaolin ceramic microbeads

Abstract

Disclosed is a method for manufacturing a high temperature and high pressure resisting oil well cementing test block through silicon kaolin ceramic microbeads. The method comprises the steps of the silicon kaolin blind hole hollow ceramic microbeads are prepared, batched, mixed and stirred for size mixing, 55 wt% to 65 wt% of G-level oil well cement, 25 wt% to 35 wt% of the silicon kaolin ceramic microbeads with the particle size of five microns to 50 microns, 5 wt% to 7 wt% of coal ash with the ignition loss of 1.1 percent and the particle size of 20 microns to 50 microns, 1.5 wt% to 2 wt% of calcium oxide with the purity of 99.9 percent, 0.5 wt% to 1.0 wt% of sodium sulfate and 1 wt% to 3 wt% of micro-silicon with the particle size of five microns to 20 microns are mixed, size mixing is carried out on the mixed materials according to the water cement ratio of 0.5-0.7, the mixed materials are poured into a set of two test molds with the length of 53 mm, the width of 53 mm and the height of 53 mm, the test molds are maintained in water bath maintenance boxes at the constant temperature of 52 DEG C for 24 hours and 48 hours respectively, the mixed materials 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 and high-pressure oil well cementing test block from silica kaolin ceramic microbeads, 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 are when the ...

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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.