SU1217871A1 - Reagent for processing clay drilling muds - Google Patents

Description

The invention relates to the drilling of oil and gas wells for oil and gas, in particular to reagents for the treatment of drilling fluids.

The aim of the invention is to improve the quality of the reagent, which provides an increase in lubricating properties of clay drilling fluids.

Examples of the preparation of the reagent.

Example 1, 160–250 g of the coupling agent is added to 500 cm of water, stirred for 5–10 minutes, then 1–19 g of hydrolyzed polyacrylonitrile is added, the volume is adjusted to 1 l and mixed for 1–1, 5 hours. To increase the stabilizing capacity of the reagent, 0.5-10 g of sodium hydroxide is additionally added.

Example 2. 160-250 g of oxyl are added to 500 cm of water, stirred for 5-10 minutes, then 1-10 g of K-4 is added, the volume is brought to 1 l and stirred for 1 - 1.5 h In order to improve the stabilizing ability of the reagent, 0.5-10 g of soda ash is additionally introduced. To reduce the preparation time of the reagent, it is recommended that the mixture be heated to 60-90 ° C. The reagent can be creeped dry.

Reagent for treating clay drilling fluids was tested under fresh and mineralized laboratory conditions.

The initial values of the solution were measured, then the solutions were divided into a series of equal parts, and one part was treated with oxyl, the second with KHSS, the third with acrylic polymer, and the fourth with reagent.

The treated solutions were mixed for 2 hours with a stirrer at 1.5 thous. Vol., Then they were placed on the sludge, after which their indices were again measured. The effectiveness was judged by

ten

15

217871

indicators and sediment solutions. The precipitate characterized the flocculating properties of the reagent.

After treating the solution with reagent 5, a precipitate of the reagent was measured, then 0.05-1.0 wt.% Of sodium hydroxide or soda ash was added to it, the solution was treated with this reagent, and the solution values were measured.

The results of laboratory studies, as well as information on lubricating, anticorrosive properties and pumpability are shown in the table.

As can be seen from the table, the reagent, containing 16–25 wt.% Lignosulfonates and 0.1–1.0 wt.% Per dry weight of acrylic polymer, has a low viscosity value, is sleepy and has flocculating properties.

A decrease in the content of lignosulfonates of less than 16 wt.% Leads to an increase in the water yield of the solution, an increase in their content by more than 25 May. % does not improve the effectiveness of the reagent.

A decrease in the acrylic polymer content of less than 0.1 wt.% Does not improve the flocculating properties of the reagent, and an increase of more than 1.0 May. % worsens them.

The reagent improves lubricating and anticorrosive properties, pumpability of drilling fluids.

The lubricating properties of the drilling fluid were assessed by the coefficient of shear crust (CSC), and anti-corrosion properties were evaluated by the corrosion activity coefficient20

25

thirty

35

pitching.

Instead of hydrolyzed polyacrylonitrile, methac, polyacrylamide, including hydrolyzed, M-14 can be used, and instead of CSSC, PRS, PRS, instead of K-4, K-9, and

sodium hydroxide sodium hydroxide, soda ash can be replaced by Tripoli — sodium phosphate.

The same +

+ 2.5% CSSC 25 9

The same +

, + 2.5%

okzila 27 16

Same h

+ 2.5%

hydrolyzed polyacrylonitrile 139 4

Same 4

 + 2.5% K-4 170 4

The same- +

+ 2.5% reagent containing 15%. FALC, 0.5% hydrolyzed polyacrylonitrile and 84.5% i water. 22 11

The same + I- + 2.5% reagent, containing 16% FACG, 0.5% hydrolyzed polyacrylonitrile and 83.5% water 21 9

The same +

+ 2.5% of reagent containing 20% of coupling agents; 0.5% of hydrolyzed polyacryl; they are trityl and 79.5% of water 20 6

16/33 0.24 0.76 9

ABOUT

18/37 0.27 0.75 10

157/283 0.56 0.81 19

ABOUT

161/308 0.60 0.79 22

18/27 0.11 0.31 3

2.7

14/22 0.10 0.31 3. 16,1

5/14 0.06 0.42 3

29.3

The same t + 2.5% of the reagent containing 25% CSAC, 0.5% hydrolyzed polyacrylonitrile and 74.5% water

The same + + 2.5% of reagent containing 26% of PSAC, 0.5% of hydrolyzed polyacrylonitrile and 73.5% of water

The same + + 2.5% reagent containing 20% FHC, 0.05% hydrolyzed polnacrylonitrile and 79.95% water

The same + + 2.5% reagent containing 20% FSCC, 0.1% hydrolyzed polyacrylonitrile and 79.9% water

19 5 0/9 0.05 0.58 3

I

32.7

19 5 0/9 0.05 0.70 3 32.7

I

20

12

22/31 0.25 0.40 9.

nineteen

3/10 0.09 0.30 4

32.5

Table continuation

32.7

22/31 0.25 0.40 9.

3/10 0.09 0.30 4

32.5

- 20

- 22

25

21

20

5/14 0.14 0.38

7/14/25 14/25 0.16 0.41

19/35 0.25 0.54

ten

12/23 0.12 0.33

6/18 0.10 0.31

Table continuation

5/14 0.14 0.38 5

29.3

10.2

19/35 0.25 0.54

31

12/23 0.12 0.33

3.4

6/18 0.10 0.31

20.4

19% 19

nineteen

20

18

nineteen

ten

0/7 0.05 0.40

3 40.5

O / O 0.05 0.58

3 46.7

O / O 0.05 0.63

3 46.7

17/29

0.26 0.38 9

O / o

0.08 0.29 4

48.0

0/5

0.12 0.35 5

30.1

20 25 21 19 19

0- / 6

7 12/30

10 12/23

0/5

4 O / O

0- / 6

0.15 0.40 4

14.3

0.23 0.52 9

4.8

0.05 0.40 3

0/5

0.05-0.40 3

46.0

0.04 a, 35 3

49.5

19, 20

 , 20

20

O / o

5/14

3/12

0/9

0.05 0.39

52.0

0.06 0.41

30.0

0.05 0.40 3

32.3

0.05 0.40 3

34,8

15

, 20

20

O / o

O / o

Compiled by G. Sapronov. Editor A. Makovska Tehred N. Bonkalo Proofreader E. Sirohman

Order 2532 Circulation 644 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5:

Production and Printing Enterprise, Uzhgorod, st. Design, 4.

1217871

sixteen

Table continuation

O / o

0.06 0.43 3

40.1

0.09 0.45 3

4.0

Claims (1)

REAGENT FOR TREATMENT OF CLAY DRILLING SOLUTIONS, containing hydrolyzed polyacrylonitrile, lignosulfonate, mainly oxyl and water, characterized in that, in order to improve the quality of the reagent, which improves the lubricity of the clay drilling mud, the components are taken in the following ratio, May. %: Hydrolyzed Lignosulfonate 16.0-25.0 polyacrylonitrile (dry matter) 0.1-1.0 £ Water Rest ω e