Low-density oil well cement reinforcing material and preparation method and using method thereof

Abstract

The invention discloses a low-density oil well cement reinforcing material, and relates to the technical field of oil well cement. The low-density oil well cement reinforcing material consists of, byweight: 20-60% of a reinforced inorganic material, 5-30% of a coagulation-promoting early-strength material, 5-30% of micro-silica powder and 10-30% of granular cement, specifically, the reinforced inorganic material is one of superfine gelling material or superfine latent gelling material, and the particle size of the reinforced inorganic material is 1250 meshes to 8000 meshes; and the coagulation-promoting early-strength material comprises, by weight: 50% of organic acid salt cement early-strength agent and the mixture of 50% of organic cement early-strength agent and inorganic cement early-strength agent. The invention also discloses a preparation method and use method of the low-density oil well cement reinforcing material. The low-density oil well cement reinforcing material is capable of obviously increasing the compressive strength of low-density oil well cement when being added into a cement slurry system, wide in material source and low in cost.

Description

technical field [0001] The invention relates to the technical field of oil well cement, in particular to a low-density oil well cement reinforcing material and a preparation method and application method thereof. Background technique [0002] At present, the composition of low-density oil well cement is mainly composed of lightening materials such as power plant drift beads, fly ash, artificial glass beads and perlite vitrified beads. The compressive strength at low temperature (below 45°C) is relatively low, which cannot meet the requirements of cementing construction. Moreover, the prices of power plant floating beads and artificial glass beads are relatively high. Perlite vitrified microbead low density oil well cement has low compressive strength. Therefore, there are two major disadvantages of low-density oil well cement at present. First, low-density oil well cement has low compressive strength; Contents of the invention [0003] In order to overcome the shortcomi...

AI Technical Summary

Problems solved by technology

The compressive strength at low temperature (below 45°C) is relatively low, which cannot meet the requirements of cementing construction

Moreover, the prices of power plant floating beads and artificial glass beads are relatively high

Low-density oil well cement with perlite vitrified microbeads has low compressive strength

Therefore, the current low-density oil well cement has two major disadvantages. First, the low-density oil well cement has low compressive strength; second, the price is high and cannot be widely promoted.