SU637528A1 - Plugging mud - Google Patents

Description

one

The invention relates to the production of polymer cement slurries, in particular, for cementing oil and gas wells and can be used in the oil and gas industry.

Various polymer cementing solutions for well cementing are known, for example, a solution based on resorcin-formaldehyde resin FR-12 with the use of formalin ij as a hardener. However, this solution has inherent flaws - a large amount of shrinkage of the stone, the viewpoint cost and deficiency, toxicity, limiting its use.

The closest in composition to the proposed solution is a solution based on a phenol-resin resin FRA using benzenesulfonic acid 2j as a hardener. However, this solution also has a large amount of shrinkage during curing, which reduces the quality of well cementing.

The purpose of the invention is the elimination of stone shrinkage.

This goal is achieved with a tampon solution containing, as a base, an AFA phenol resist resin (28–53 wt.%), A hardener (3–21 wt./about) and a filler (the rest) in which sulfosalicylic acid is used as a hardener. In order to shorten the curing time, orthophosphoric acid in the amount of iO-2O wt.% Can be additionally introduced into the proposed cement slurry.

To obtain a polymer cement slurry of the indicated CCA & v, 7 mixtures of APA resin with a hardener, sulfosalicylic acid, were prepared. In each mixture, 1OO cm of FRA resin was housed, and the hardener, sulfosalicylic acid, respectively, 5; 1O; 15; 2O; 25; ZO; 4O see. Suly |) Osalicylic acid in crystalline

The state was pre-dissolved in orthophosphoric acid.

The results of curing are given in table. one.

Table 1

In order to obtain an optimal range of inert filler content that ensures minimal shrinkage, 6 mixtures were prepared, consisting of 100 cm of FRA resin and 30 cm of hardened sulfosalicylic acid. The volume of inert filler - sand, respectively, ssyutavil O; 5O; 10O; ISO; 2OO; 250 cm jj The results of hardening are shown in Table 2. Table 2

Given in Table. 1 and 2 data indicate that the content of hardener - sulfosalicylic acid in the composition of the solution should not be

-one

less than 1O cm when the content of the resin FRA 10O cm, i.e. not less than 10% weight,%. With a lower content of hardener, as evidenced by mixture No. 1, the strength characteristics after daily curing are lower than required (9 kg / cm (Shadrin L. N. Regulation of the properties of cement slurries during well cementing, M., Nedra, 1969, p. 1O) ,

At the same time, an increase in the hardener content of more than 4 cm, while

The data show that the solidification time of the mixture is back to the continuation of table 2

The same content of FRA resin is impractical, since at a sufficiently high strength, the rate of solidification in ZR sec is not required.

For the upper limit of the content of inert filler, as can be seen from Table 2, it is advisable to accept 25 O cm, i.e. 2.5 times more than the resin, since its further excess will lead to a sharp decrease in the strength characteristics, as can be seen from a comparison of mixtures No. 5 and No. 6.

Data on the effect of temperature on the curing time are given in Table. 3

Table 3

Claims (2)

proportionally to the amount of injected otverdntel and ambient temperature, which is consistent with the data given in materials Vll Dcecoiixanoro soil consolidation (L., Energie, 1971, p. 282) and corresponds to the norm. The technical and economic efficiency of the invention consists in a significant reduction in the cost of the solution in comparison with the known similar purpose. In addition, the proposed solution provides high quality of cementing operations as a result of a sharp decrease in the degree of shrinkage. Claims 1. A tamping solution containing as a base an AFA phenol-resole resin, a filler and a hardener, is about one million, in order to eliminate shrinkage of the stone, a sulfosalicylic acid is used as a screwdriver in the following ratio of components, dog. %; Feio71 resistive resin ФРА28-53 Sulfosalicylic acid3-2. The filler is the rest. 2. -Tamping mortar according to claim 1, characterized in that in order to shorten the curing time, it additionally contains orthophosphoric acid in an amount of 10-20% by weight: Sources of information taken into account during the examination: 1. Labor of TatNII. Issue 13, 1969. 2. Referative collection Plastics, M., 1973, № 1.