SU618532A1 - Plugging mix - Google Patents

Description

(54) MIXING SOLUTION

BACKGROUND OF THE INVENTION The invention relates to cement slurries for cement works in high temperature wells. Known cement slurry for high-temperature wells containing systof used to produce Portland Cement 1. However, in this case sishtof is an active mineral additive and is used for grinding cement clinker along with granulated basic blast furnace slabs. Also known is the cement slurry for high-temperature wells, which contains sclac, metallurgical wastes and an aqueous solution of liquid glass 2. However, it is not strong enough and durable. In order to increase the strength and durability of the cement stone, the cement slurry additionally contains waste from the production of alum and aluminum sulphate - sishtof, with the following ratio of components, wt. ° / o: Slag - waste from the metallurgical industry. cystof3030-60 To obtain a cement slurry, water is added with liquid glass to obtain, with stirring, a homogeneous suspension of the required consistency. The cement stone formed under the conditions of hydrothermal hardening at high temperature is characterized by high characteristics of gas impermeability, corrosion resistance and adhesion. With a constant active slag component and relatively low temperatures, the content of liquid glass is taken to be minimal. A decrease in the activity of the slag component at a constant temperature increases the consumption of the activator — liquid glass. At relatively low temperatures and a constant slag component, the flow rate of the liquid glass increases, and the sympathetic content decreases. With an increase in temperature at a constant slag component, the consumption of liquid glass decreases, and the content of the syshtof increases. At the same time for relatively low

These temperatures are recommended to use active granular (vitreous) basic slags with a modulus of basicity.

not less than 1, and at high

% SiO

at temperatures of low-level acidic slags with a modulus of basicity less than 1 and waste (crystallized) slags.

At very high temperatures, it is recommended to add heat-resistant reagents - setting retarders, as well as quartz sand, loess loam and sandy loam.

Example. A cement slurry of the following composition is prepared (w / o): granulated electrothermophosphorus slags with a modulus of basicity 1.10 .... 40, an aqueous solution of liquid glass (sodium metasilicate with a module --- 4g 3) in terms of dry

Muggle

substance 10, sishtof 50.

Granulated electrothermophosphoric sclabs are melted in a ball mill to a specific surface of 3000, and liquid glass is added with mixing water. In this case, the water content is 70%, and the flowability along the cone of AzNII is 22 cm.

The specific gravity of the solution is 1.72 g / cm, and the setting time at 120 ° С is the beginning after 3 hours, and the end is after 5 hours and 30 minutes.

The mechanical strength of the cement stone after hardening at 120 ° C after 48 hours of bending was 47 kgf / cm, and 160 kgf / cm for compression.

four

In order to slow down the setting of the solution at a temperature of 150 ° C, 0.5 / o tartaric acid is added, at a temperature of 180 ° C - 0.3% trioxyglutaric acid. The resulting stone is characterized by a dense and uniform structure, and its gas permeability is close to zero.

Claims (2)

1. USSR author's certificate number 34371, cl. From 04 to 7/54, 1933. 2. Machnneky EK and Finogenov I. S. Well drilling and oil production. .M., “Gostoptekhizdat, 1962, p. 18-26.