SU883138A1 - Emulsion washing solution - Google Patents

Description

one

The invention relates to the field of high-speed drilling of wells in hard rock Y111-X11 drillability. .

Known emulsion water based washing solutions with various lubricant additives (such as serial emulsoles EL-3, EL-4, EN-4, etc.) lose their stability with increasing temperatures and are destroyed in the presence of saline water in wells 1.

The closest to the present invention is an emulsion wash solution consisting of water and a lubricant additive — emulsol ET-2. 2. I The solution contains 0.5-1.0 wt.% Emulsol ET-2, consisting, wt.%: Mixture of salts heat oil6,5-7,5

A mixture of sodium salts of oil asi6, 5-7.5 dol

A mixture of water and up to 60 alcohol

Industrial oil up to 100

However, this emulsion wash solution does not have high enough anti-friction

properties and loses its stability when heated above 40 ° C, as a result of which the solution does not provide its functions. when drilling wells with deep water. at a bottom of more than 1000 m, the temperature at the bottom of the well reaches 40-60 ° C and higher (due to the necessity of drilling wells for solid minerals to a depth of 3,500 m

10 the problem of increasing the thermal stability of emulsion solutions is relevant).

In addition, this solution can be used only if

15 wells of fresh and weakly mineralized (up to 4 mg-eq / l) water. In the case of the presence of saline water in the boreholes, the solution is destroyed.

The aim of the invention is to improve the antifriction properties, thermal stability and durability in saline waters of an emulsion wash solution.

25

. To achieve the goal, sodium ethylsiliconate is additionally introduced into the emulsion wash solution, and as an additive, the product of the esterification of triethanolamine with a mixture.

30 distillate acids and oil

in the following ratio, wt.%:

The product of the esterification reaction of triethanol-amine with a mixture of acids

tall distillate

oil0.25-1.00

Sodium ethylsiliconate 0.10-0.50

WaterUnder 100

The product of the esterification reaction of triethanolamine and tall oil distillate is a mixture of tall oil esters and triethanolamine,

The composition of tall oil includes higher acids: palmitic (COOH), oleic (linolinic (C jHugCOOH), abcezztinova {C | 5 HjgCOOH).

The simultaneous use of the product of the esterification of trietanoamine with a mixture of tall oil distillate acids together with sodium ethyl silicate, due to the synergistic effect, makes it possible to obtain a solution with high antifriction properties, thermal stability and stability in saline waters.

The emulsion wash solution is prepared as follows.

The product of the esterification reaction with triethanolamine with a mixture of acids contained in tall oil distillate () CH, 2 CH; 2-OCOR is designated by the following index / 4.

R, etc., which is a dark brown liquid with an initial boiling point of about 200 ° C, is dissolved in water at room temperature. Sodium ethyl silicate is then added and the mixture is stirred at 1000 rpm for 1 hour with a stirrer. After that, the emulsion wash solution is ready for use.

In tab. 1 shows the proposed solution compositions, which differ in the content of product D and sodium ethyl silicate.

The thermostability of the proposed and known emulsion washing solutions was tested by thermostating in a drying oven every 10 ° C, starting with a temperature of 30 s.

The stability of the solution in saline waters was determined by adding saline water with a hardness from 1 to 110 mEq / l to the emulsion wash solution.

The test results are shown in Table. 2

As can be seen from the data table. 2 solutions 1, 2 and 3 have the highest heat resistance, antifriction properties and resistance in saline waters.

Compared to the oily solution (base object), the antifriction properties of the proposed washing solution increase by 1.5 times, thermal stability - by 3 times. At the same time, the stability of the solution in saline waters increases 10-25 times.

The introduction of the product of the esterification of triethanolamine with a mixture of tall oil distillate acids and sodium ethyl silicate in a smaller quantity than the proposed lower limit does not provide an improvement in the properties of the solution compared with the known (basic object).

The increase in the content of these components in the solution above the upper limit, as shown by the data in Table 2, does not lead to an increase in the antifriction properties, heat resistance and stability in saline waters.

In addition, an increase in the sodium ethylsiliconate content above 0.5% by weight is impractical because the temperature in the wells does not exceed and therefore a further increase in the thermal stability of the solution is not necessary.

At the same time, the emulsion wash solution does not adversely affect the environment (groundwater).

The use of the proposed emulsion wash solution allows for increasing productivity, drilling, reducing diamond consumption during drilling, and increasing the corrosion resistance of the drilling tool.

Claims (1)

The expected economic effect from the use of the proposed solution in the exploration expeditions of the Ministry of the Ukrainian SSR will be 286,000 rubles. 788 The claims of the emulsion wash solution, and water-containing and lubricant additive, characterized in that, in order to increase the anti-friction properties, thermal stability and durability in mineralized waters. it additionally contains sodium ethylsilicate and, as a lubricant additive, the reaction product of esterification of triethanolamine with a mixture of tall oil distillate acids with a desired ratio of 1388 10-0.50 Water Else Sources of information taken into account during the examination Y.N. and others. Drilling fluid Q Pry with improved lubricating properties, M., Nedra, 1975, p. 2.8jl03. 2- Lis Nsky V.I. New types of emulsion solutions and anti-vibration greases. Exploration and protection of mineral resources, 1979, 1, p. 32 (prototype).