SU1423574A1 - Reagent for treating the drilling fluid and method of preparation thereof - Google Patents

Abstract

The invention relates to the drilling of wells in the exploration and oil fields. The purpose of the invention is to increase the stabilizing ability of a reagent for treating a drilling fluid, a thief (BR), to increase the output of the BR and to reduce its static shear stress. The reagent for treatment of BR includes the following ingredients with their ratio, wt%: polyacrylamide 1.5-2.0; silicone fluid (skin) 30-40; acrylonitrile lignosulfonate reagent (ALR) 35-38; water the rest. To speed up the preparation of the reagent, ALR is preliminarily dissolved in water. Then, polyacrylamide and SKIN are introduced into the resulting solution. GKZh-10, GKZh-11, petrosil, and ALR are used as the LEATHER, a product of alkaline hydrolysis of polyacrylonitrile in the presence of lignosulfonates. Polyacrylamide is used to prepare reagent for treating BR with molecular weight from 3-10 to 610 m. 2 sec. f-ly, 2 tab. (L

Description

The invention relates to drilling wells in the exploration industry and the oil industry, in particular, to carrying out the flushing of oil and gas wells I,

I The purpose of the invention is to increase the stabilizing ability of reagent j for treating drilling mud, providing an increase in the yield of drilling fluid I and reducing its static stress.

Reagent for the treatment of drilling fluid includes polyacrylamide, silicone fluid, acrylonitrile lignosulfonate reagent and water in the following ratio of ingredients, wt,%:

Polyacrylamide 1.5-2.0 Silicone:

liquid 30-40

Acyl ilonitrile lignosulfonate reagent35-38

WaterEverything

To speed up the preparation of the reagent, the acrylonitrile reagent is dissolved in water, and then polyacrylamide and silicone liquid are introduced into the resulting solution. I For the preparation of the reagent, polyacrylamide (PAA) with mol.mae, soi 3-10 - m.e. I GKZh-10, GKZh-11, | petrosil are used as a silicone fluid.

 Acrylonitrile lignosulfonate reagent anilis is a product of alkaline hydrolysis of polyacrylonitrile in the presence of lignosulfonates in the following ratio of components, wt.%:

Polyacrylonitrile 10 Lignosulfonate10

Alkali8

i WaterOther

PRI me R 1. Preparation of the reagent is carried out as follows.

To 335 G- (33.5 wt.%) Of water, add 350 g (35 wt.%) Of anilis with outweighing for 5 minutes, and then 15 g (1.5 wt.%) Of PAA with a mole- 1 with a mass of street and are stirred until a uniform i acTBopa is obtained, which takes JI5 minutes. After that, 300 g (30 wt.%) Of NGL-10 are introduced and mixed.

0

five

0

five

0

five

0

five

0

five

obtaining a homogeneous solution within 10 minutes. The total duration of the preparation process of the complex reagent was 30 minutes. . , Example 2. To 267.5 g (26.75% by weight) of water, add 365 g (36.5% by weight) of anilis with stirring over 5 minutes, and then add 17.5 g (1.75 wt.%) PAA with a molar mass of 610 and stir until a uniform pacTBdpa is obtained, which takes 25 minutes. After that, 350 g (35 wt.%) NGL-11 are added and mixed until a semi-uniform solution within 20 minutes. The total duration of the preparation of the complex reagent was 50 minutes.

EXAMPLE 3 To 200 g (20 wt.%) Of water, 380 g (38 wt.%) Of anilis was added with stirring for 5 minutes, and then 20 g (2 wt.%) Were added. PAP the molar mass 310 and stirring is carried out until a mono-solution is obtained, which takes 35 minutes. After that, 400 g (40 wt.%) Of petrosil are introduced and mixed until a homogeneous solution is obtained for 20 minutes. The total duration of the preparation process of the complex reagent was 60 minutes.

EXAMPLE 4 To 200 g (20 wt.%) Of water, 380 g (38 wt.%) Of anilis are added with stirring for 5 minutes, and then 20 g (2 wt.%) Of PAA are added. mol. mass 610 and stirring until a homogeneous solution is obtained, which takes 35 minutes.

After that, 400 g (40 wt.%) Of NGL-TO is added and stirred until a homogeneous solution is obtained for 20 minutes. The total duration of the preparation process of the complex reagent

amounted to 60 minutes

I

EXAMPLE 5 To 385 g (38.5 wt.%) Of water is added. 300 g (30 wt.%) Of anilis with stirring for 5 minutes, and then 15 g (1.5 wt.%) Of PAA with a molar mass of 3-10 are added and mixing is carried out until a homogeneous solution is obtained, which takes 60 min After that, 300 g (30 wt.%) NGL-10 are introduced and mixed until a homogeneous solution is obtained for 1O minutes. The total duration of the preparation process of the complex reagent was 75 minutes.

3142

Details of the composition and duration of the preparation of these complex reagents are given in Table. 1. ,, Complex reagents containing ingredients (see Table 1, Examples 1-4) were introduced into slurries containing 15% of clay with stirring for 15 minutes until homogeneous drilling fluids were obtained.

Parameters and drilling fluid output

Table of 1 m complex reagent are presented in Table. 2

The yield of the drilling fluid from 1 m of the complex reagent was determined by the following method. If about 1 m (in%) complex reagent is required to prepare 1 m (1PO%) of drilling mud, then 1 m of complex mud, i.e.

and m

ioo%: j 1

,

X

X

m

or

m

For example, if the preparation of 1 m (100%) drilling mud requires 0.025 m (2.5%) of the complex reagent, then from 1 m of the complex reagent-X can be prepared, i.e.

  - o-GKG-- - °

V -

100% .1 m

275%

 40 m.

Ula Invention Form

1. Reagent for treatment of drilling fluid, including polyacrylamide, silicone fluid and water, differing in m. That, in order to increase its stabilizing ability, which provides an increase in the output of the drilling fluid and a decrease in its static shear stress, the following ratio of ingredients, wt.%:

Polyacrylamide 1,5-2,0

Organosilicon

liquid 30-40

Acrylonitrile

lignosulfonate

reagent35-38

WaterEverything

2. A method of preparing a reagent for treating a drilling fluid, comprising mixing the polyacrylamide and the silicone fluid with water, characterized in that the acrylonitrile lignosulfonate reagent is previously dissolved in water.

Table 1

table 2

Claims (2)

mule and acquisition Drilling agent one. a solution comprising polyacrylamide, an organosilicon liquid and water, characterized in that, in order to increase its stabilizing ability, which provides an increase in the yield of the drilling fluid and a decrease in its static shear stress, it additionally contains an acrylonitrile lignosulfonate reagent in the following ratio of ingredients, wt.%: Polyacrylamide Organosilicon liquid Acrylonitrile 'lignosulfonate reagent, Water 1.5-2.0 30-40 35-38 Else For example, if 0.025 m ³ (2.5%) of a complex reagent is required to prepare a m ³ (100%) drilling fluid, then from 3 m ^{3 of a} complex cutting agent, X ³ drilling mud can be prepared, i.e. · 2. A method of preparing a reagent for treating a drilling fluid, comprising mixing polyacrylamide and an organosilicon liquid with water, characterized in that the acrylonitrile lignosulfonate is pre-dissolved in water. reagent.