Method for preparing low-density oil well cementation cement test block through titanium diboride ceramic beads

Abstract

The invention provides a method for preparing a low-density oil well cementation cement test block through titanium diboride ceramic beads. The method comprises the following steps: preparing hollow titanium diboride ceramic obturator beads, batching, mixing, stirring and mixing size, testing a mould, testing strength, uniformly mixing and stirring 40-50wt% of class G oil well cement, 10-15wt% of superfine cement with the particle size of 13 microns, 25-35wt% of hollow titanium diboride ceramic obturator beads with particle sizes of 5-50 microns, 5-7wt% of coal ash with loss on ignition of 1.1%, 1.5-2wt% of calcium oxide with purity of 99.9%, 0.5-1.0 wt% of sodium sulfate and 1-3wt% of micro-silicon, stirring and mixing size in an agitator in a water-cement ratio of 0.5-0.6 (W / C) for 40 seconds, pouring the mortar in a test mould, curing the mortar for 24 hours or 48 hours in a water bath curing box with a constant temperature of 52 DEG C, demoulding, soaking the test block in cold water for 1 hour, and performing 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 titanium diboride ceramic 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 burne...

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.