SU1125226A1 - Method for treating clayey drilling and plugging muds - Google Patents

Abstract

1. A method for treating clayey drilling and cementing solutions by introducing a viscosity reducing agent, characterized in that, in order to increase the treatment efficiency by increasing the thinning properties of the solutions. As a viscosity reducing agent, the solutions contain distillation residues from the production of synthetic glycerin, containing, in wt.%: Polyglycerols 60-67 Sodium chloride 8-13 Water Remaining in an amount of 0.1 - 0.5% by weight of the solution. 2. The method according to claim 1, characterized in that the polyglycerols contain the following components, in%: 8.0-15.0 Glycerol 80.0-85.0 Diglycerin 3.0-4.0 Triglycerol 1.5- 2.0 Tetraglycerin 0.5-1.0 Pentaglycerin (L

Description

to eat yu K)

A: The invention relates to the oil industry, more specifically to methods for controlling the properties of cement slurries and drilling fluids. There are known methods for treating clay drilling and cement mortars by introducing viscosity reducing agents (sulfite alcohol bar, condensed bard sulfite, nitrolignin, etc.) However, in this method of processing sulfite alcohol bard and condensed sulfite alcohol bard, they do not effectively reduce the viscosity of liquids . The retarding effect of these reagents on i.ementny {}) cross sections is ambiguous, i.e. they can both slow down and accelerate the setting time of the solutions. A known method of processing clay. drilling and cement mortars r | we thaw the introduction of reagents viscosity 2. However, the addition of PFLH does not effectively increase the flowability, slows down the setting time of cement and reduces the viscosity of clay solutions. When preparing rast | orov with this additive is formed. abundant foam, therefore additional scavengers should be added to the solution. To prepare the PFLC solution, prolonged mixing (1.0-1.5 h) in clay mixers or cementing aggregates is necessary. The reagent has a high cost. The aim of the invention is to increase the processing efficiency by increasing the diluting properties of the solutions. The goal is achieved by the fact that, according to the method of processing clay drilling and cement mortars by introducing a viscosity reducing agent, the latter solutions contain bottom residues of synthetic glycerin production, containing, in wt%: Polygliderine 60-67 Sodium chloride 8-13 Water the amount of 0.1 - 0.5% by weight of the solution. Moreover, polyglycerols contain the following components, wt.%: Glycerin 8,0-15,0 Diglycerol 80,0-85,0 Triglycerol 3,0-4,0 Tetraglycerol 1,5-2,0 Pentaglycerin 0,5-1,0 The main active The component of polyglycerols is diglycerin, which is confirmed by the results of a comparative assessment of the effect of various glycerols on the properties of solutions. In tab. 1 shows the properties of the mud solution containing 40% clay and 60% water, density, 1.32 g / cm without additives (initial solution) and with the addition of glycerin, diglycerin and polyglycerol. As can be seen from the table. 1, the decrease in the relative viscosity of the original clay solutions occurs mainly due to the addition of diglycerin. Additions of the remaining components at the same concentrations have a negligible effect on reducing the viscosity of the drilling fluid. In tab. 2 presents the properties of cement mortars with a / C 0.5 without additives and with the addition of glycerol, diglycerin and polyglycerol. From the data table. 2, it follows that diglycerol has the main effect on reducing the flowability of cement mortar. / Waste is a thick, brown-colored liquid that dissolves well in water. Depending on the method of isolation, the solution of polyglycerol has a pH from 10 to 4. For a comparative evaluation of the effectiveness of the known and proposed additives, cement slurries were prepared that differ from each other in the content of additives in each solution (Table 3). The tests were carried out under the same conditions. according to GOST 1581-78. Solutions; tested for conditions of cold (T) and hot (T 75 ° C) wells. The test results of cement mortars are presented in table. 4. The results of processing the high viscosity mud solution of OPG and PFLH in table. 5, I As can be seen from the data table. 4 and 5, waste products from the production of synthetic glycerin more effectively increase the flowability, slow down the time of thickening and setting of cement and reduce the viscosity of the clay solutions than polyphenols. Cement stone containing polyglycerol, has a higher strength. With the addition of the proposed reagent, little foam is formed, which can be judged by the density of the solutions. So with the addition of OPG, the density of solutions decreased by 0.02-0.04 g / cm compared to the initial ones, and the density of solutions with the addition of polyphenols decreased by 0.02-0.10 g / cm. The reagent dissolves well in water and is significantly cheaper than polyphenols. upif cementing cold wells is not recommended to introduce the proposed additive in an amount of more than 0.1 wt.%, because the setting time of cement slows down dramatically. Content of components,% Density Clay solution 100 without additives 1.32 Clay solution 100 + glycerin 0.5.1.30 Clay solution 100 + diglycerol 0.51.30 Clay solution 100 + polyglycerol 0.51.30 "" to "c -" w - “m. Content of components,% -. Cement mortar 100 without additives Cement mortar 100+ glycerol 0.20, Cement mortar 100+ diglycerin 0, Cement mortar 100+ polyglycerol Number Composition Content of the composition of the composition of Portland-OPG I cement Table 1, Viscosity relative, relative to% 90 100 82 91 46 51 3741 Table 2 Solution flowability, cm g 19.0 20.0 2022.0 0.2022.0 T a b l and c a 3 nnt, wt.% Polyphenol B (S) ia

66.7

Original

66.6

 The proposed 66.0. 65.4 66.6

Known 66.0

 1 65.4

OPG - a waste of glycerol production.

Rest

and

0.1 0.2 0.3

Mud properties

Composition

Additive

Table 4

Claims (3)

1. METHOD FOR PROCESSING CLAY DRILLING AND CEMENT SOLUTIONS by introducing a viscosity reducing agent reagent, characterized in that, in order to increase the processing efficiency by increasing the fluidizing properties of the solutions, the solutions contain vat residues for the production of synthetic glycerin containing, Polyglycerols Sodium Chloride Water in an amount of 0.1 - 0.5 May.%: 60-67 8-13 The rest is% by weight of the solution. 2. The method of pop. 1, characterized in that polyglycerols contain the following May.%: Glycerin Diglycerin Triglycerin Tetraglycerin Pentaglycerin components, 8.0-15.0 80.0-85.0 3.0-4.0 1.5-2.0 0.5-1.0