SU874981A1 - Cementing composition - Google Patents

Description

(54) MIXING SOLUTION

 . - .; The invention relates to the field of attachment of oil and gas squash, in particular to the compositions (formulations) of cement slurries. Known for cementing solutions with enhanced life characteristics, in which quartz sand, silica, silica, and other grades are widely used at high temperature interchangeables. However, at low temperature interiors, artificial additives do not contribute to the improvement of the initial strength of the minerals. stone ,,. , -.; -. To reduce the amount of contraction in the early stages of hardening, a 5N1D tampon solution is used / in which the hydrophobised clinoptilol is added in the following ratios:%. Cement40.2-40.9 Clay1, O-2.6 Hydrophobic 8.0-12.1 clinoptilopite Water44.4-50.8 Despite the inclusion of a mineral containing a significant amount of silicon dioxide, calcium oxide, the cement plugging pacreqp does not differ from high strength characteristics. Portland cement-based cement slurry for hot wells with the addition of aerosil as a filler is also known. Aerosil, introduced in optimal amounts, on the order of 0.1-0.3%, has a hardening effect on all types of grouting cements, both in the early and late periods of hardening in the range from 18 to. The increase in strength is observed depending on the composition of the cement, the time and temperature of hardening from 20 to 1OO% ts. However, the use of the solution for cementing casing in the Carpathian fields showed that the strength of cement stones of two days old with / added aerosil based on cementing portland cement for hot clumps is 1520%, which is not enough. In addition, the introduction of a hydrogen sulfate aero-type to foaming of the cement slurry in the process of cement cement and batching it into the borehole.

The chain of the invention is an increase in the strength properties of cement stone in the interval from 40 to.

This goal is achieved by the fact that as the filler is used the mineral of the most important cruciferous origin of haphophypite, and these components are taken in the following ratios, wt. h:

Portland cement for hot wells 10O

П1фоф1тлит3-5

Water 50-55 Pyrophyllite (AB2Oa4O2NlO) is a material of volcanic origin, with a chemical ratio of ABrpg28.3%, Q.- 66%, -5.0%. The content of these components may vary widely. In the form of impurities, there may be present (up to 9%), NeO (up to 5%), He, RZ. The color of pyrophyllite is white with a yellowish tint or pale green, often the floor is transparent. Glitter glass gshy with mother-of-pearl smooth shimmer. Specific weight 2,662, 9O G / cm. It is found in some hydrothermal vein deposits in association with Kratsk, carbonates, hematite, which are formed as a result of hydrothermal decomposition of ordinary acidic rocks. It is also widespread in some metamorphic schists rich in glymozem, sometimes in very significant masses. It is formed, apparently, due to rich with beidellite or montmorillonite, x X rocks at significantly higher temperatures. For use as a floor. strands to cement slurries of the specified mineral are preliminarily milled in a ball mill. The proposed tampon solution is distinguished by an increased durability of the mental stone as compared with the known one. In addition, poluchucha 5.1Y solution has good pumpability. The introduction of pyrophyllite does not lead to the dissolution of cement mortar and to a significant acceleration of the onset of thickening. Studies have shown that the addition of pyrophyllite leads to an increase in strength

in a wide range of temperatures. Example. To 10O g of portland cement for hot wells, 3 g of P1ofofnllite is added. The mixture, in dry form, is stirred until uniform for 5 minutes. 50 g of water is added to the prepared mixture and mixed to obtain the recommended flowability.

Example 2. To 100 g of portland cement for wells 4 g of pyrophyllite is added. The mixture, in dry form, is stirred until uniform for 5 minutes. 52 g of water is added to the prepared mixture and stirred until the recommended spreadability is obtained. Example To 100 g of portland cement for hot wells, 5 g of Schofofillite are added. The mixture, in the dry state, is mixed until uniform for about 5 minutes. 55 g of water are introduced into the prepared mixture and stirred until recommended in the table. 1 spreadability. An increase in the percentage of schrophyllite above the specified limit does not lead to an increase in cement strength. Decreasing the percentage of pyrophyllite below the specified limit decreases the strength of the cement stone. The cementing of wells with the cement slurry of the specified composition excludes its foaming, and it allows to extend the service life by increasing the strength of the stone.

Claims (3)

 Claims Cement slurry containing as a base for cement Plates for hot wells, a filler and water, characterized in that, in order to improve the strength properties of the cement stone in the temperature range from 40 to 10 ° C, the mineral is used as filler of volcanic origin is mechroshtit, and these components are taken in the following ratios, wt. h: Portland cement for hot wells 1sh100 P1FOFILLIT 3-5 Water 50-55 58749816 Information sources, 2. Authorship certificate of the USSR taken into account in the examination of Nb 628289, cf. O21, 33/138, 1978. 1. Bulatov L.I. Tamponazhnye-mncheska mehshpsha of flooring solutions, Materials and cementing technologists. Kiev, Naukova Dumka, 1974, p. 183 wells. M, Nescha, 1977, p. 142. (prototype). 3. Kruglshky NI and others. Physical-chi