SU1479618A1 - Plugging composition - Google Patents

Abstract

The invention relates to the attachment of oil and gas wells. The purpose of the invention is to increase the strength of cement stone. Cement slurry contains components in the following ratio, wt.%: Cement cement 50-70, nylon fiber 0.2-1.4, alkaline waste from the production of caprolactam 0.2-2.0, the rest water. The solution is obtained by mixing the dry mixture with an aqueous solution of these wastes. Cement stone has increased adhesion to reinforcing fiber and tensile strength up to 1.6 MPa. 1 tab.

Description

one

The invention relates to the cementing of wells and can be used in the oil and gas industry, as well as in the production of geological exploration.

The aim of the invention is to increase the strength of the cement stone.

Cement slurry contains plug-in cement, nylon fiber, water and alkaline waste from the production of caprolactam with the following ratio of components, wt.%:

Grouting cement 50-70 Nylon fiber 0.2-1.4 Alkaline waste from the production of caprolactam 0, 2-2 WaterOther By chemical composition, the alkaline waste from the production of caprolactam is a mixture of

ingredients in the following average ratio, wt.%: disodium salt of about-sulfocyclohexane carboxylic acid 22; sodium salt of E-aminocaproic acid 2; sodium salt Ј - aminexanhydrobenzoyl 7; sodium acetate 2.5; sodium chloride 1,5; caustic sodium 7; water the rest.

The cement slurry is prepared by mixing a mixture of cement cement with nylon fiber with an aqueous solution of alkaline caprolactus production wastes.

Example. Tamponate material is obtained by mixing until a homogeneous state, wt.%: Cement OCG 65.8; nylon fiber (d 0.1 mm, 1 30 mm) 1.3. The mixture is shuttered with water at a water / mixing ratio of 0.5. Liquid alkaline wastes from caprolactam production are added to the mixing water.

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the amount of 2 wt.%. The density of the resulting cement slurry is 1770 kg / m, flowability is 0.185 m.

The strength of cement stone is 1.60 MPa.

Similarly, a number of cement slurries are prepared, differing in the content of alkaline wastes of caprolactam production, water cement factor, type of cement cement, whose properties are presented in the table. As can be seen from the table, an increase in the concentration of alkaline wastes from the production of caprolactam 0–15 2 wt.% Leads to an increase in the adhesion strength of the nylon fiber to the cement stone, 0.015–0.032 MPa, i.e. more than 2 times. A further increase in the concentration of alkaline wastes from the production of caprolactam over 2 wt.% Does not lead to an increase in the adhesion strength of the fiber to the cement stone.

When the concentration of alkali-25 of caprolactam waste is less than 0.2 wt.%, The effectiveness of the additive in various water-cement ratios and types of cement materials also decreases. - JQ

leads to an increase in the strength of cement stone on the p-acchryv.

The data show that the introduction of caprolactam at a concentration of 0.2-2 wt.% Into the cement solutions of alkaline wastes significantly increases the adhesion strength of the nylon fiber to the cement stone, increases its tensile strength, which greatly increases the effective reinforcement cement stone.

The use of dispersion-reinforced cement slurry will increase the impact resistance of the cement stone and prevent gas interfacial flows due to the integrity of the cement stone.

Claims (1)

Invention Formula Tamion mortar containing tampon cement, nylon fiber and water, characterized in that, in order to increase the strength of cement stone, it additionally contains alkaline wastes from caprolactam production in the following ratio of components, wt.%: Table continuation