SU998485A1 - Reagent for treating drilling muds - Google Patents

Description

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

Acrylic polymer reagents are known for treating Cl drilling fluids.

However, by improving some indicators of drilling fluids, they adversely affect others.

The closest technical solution to the invention is a drilling fluid treatment reagent containing polyacrylonitrile, alkali and water.

Hypane is a linear polymer with a large molecule length, containing,%: polynac 4.3, alkali 3.1, water up 5.6% polynac 32.6, alkali 4 and water 90.4 2.)

A disadvantage of the known reagent is the inactivation of its stabilizing properties in saline solutions. To reduce water loss to acceptable drilling values, the addition of hypane in saline solutions is increased to 2-3 wt.% (Dry matter) of the volume of the solution,

The purpose of the invention is to reduce the water loss of solutions.

The goal is achieved by the fact that the reagent contains nitrolotrimethylphosphonic acid with the following ratio of ingredients, wt.%: Polyacrylonitrile 5-20 Alkali, for example sodium hydroxide, caustic calcium 4-8 Nitrilotrimethyl 10 phosphonic acid or its salt. 0.5-25 Water Else Reagen: can also be obtained in dry form,

15

Nitrilotrimethylphosphonic to 1slot has the formula

HE

-SN -Ron

20

,

he

Molecular weight 299.06, t, pl, 208210 ° C, t, k, 800 ° C,

25

Nitrilotrimethylphosphonic acid produces Cheboksary chemical plant

Liquid Reagent Technology .2

0.5 m of an 8–16% aqueous alkali solution (caustic soda, caustic potash) is poured into the container, L0 200 kg of polyacrylonitrile, 5–250 kg of nitrilotrimethylphosphonic acid or its salts are added and the volume is adjusted to 1 m with water. with stirring, heat to 9b-100 ° C and stir for 3-5 hours until a uniform viscous liquid is obtained. Drying of the reagent is carried out with superheated air or other known methods. Efficiency check was carried out on fresh, mineralized, emulsion and clay-free solutions. Efficiency assessment was carried out with formulations containing zgipan and K-4. For the evaluation criterion taken indicators of water loss. The results are shown in the table. Instead of polyacrylonitrile, chemical and light prokvlshlennyh by-products containing polyacrylonitrile can be used. Under the conditions of oil and gas exploration expeditions and drilling, hydrolysis may be used in place of polyacrylonitrile and alkali. Wanted polyacrylonitrile-hypan. As can be seen from the table, the optimal composition of the reagent contains 5-20% polyacrylonitrile, 4-8% alkali, 0.5-25% nitrilotrimethylphosphonic acid or its salts and water. The implementation of the invention allows to improve the quality of drilling fluids, reduce their cost, prevent dispersion of drill cuttings particles in the solution and their enrichment, which will improve the conditions of bit operation and increase the mechanical drilling rate.

Emulsion solution of 5% bentonite + 15% oil + H 80% water

1.03

Emulsion solution + 3i

hypana1.03

Emulsion solution + + 3% reagent containing 4% polyacrylonitrile, + 6% NaOH + 10% nitrilotrimethylphosphonic acid + 80% water

Emulsion solution + +, 3% reagent containing 5% ps) of liacrylonitrile, + b% NaOH + 10% nitrilotrimethylphosphonic acid + 79% water

Emulsion solution% 3% reagent containing 10% polyacrylonitrile, + 6% NaOH + + 10% nitrilotrimethylphosphonic acid + 74% water

Emulsion solution + 3% reagent containing 20% polyacrylonitrile, + 6% NaOH. + 10% nitrilotrimethylphosphonic acid + 64%

water

47 22/41 40

More than 90

88

79 58/93 21

49

23

15

16/25

39

14/24

Multi-solution + 3% reagent containing 25% polyacrylonitrile, + 6% NaOH 4-10% nitrilotrimethylphosphonic acid + 59% water

Emulsified solution + + 3% reagent containing 10% polyacrylnigryl, + 3% NaOH + 10% nitrilotrimetrophylphosphonic acid + 77% water Emulsion solution + + 3%, reagent containing 10% polyacrylonitrile, + 4% NaOH + 10% nitrilotrimethylphosphonic acid + 76% water

Emulsion solution + + 3% reagent containing 10% polyacrylonitrile, + 8% NaOH + 10% nitrilotrimethylphosphonic acid + 72% water

Emulsion solution + + 3% reagent containing 10% polyacrylonitrile + 10% NaOH + 10% nitrilotrimethylphosphonic acid + 70% water

Emulsion solution + + 3% reagent containing 10% polyacrylic acid, + 6% NaOH + 0.25.% Nitrilotrimethylphosphonic acid + + 83.75% water

Emulsion solution + + 3% reagent containing 10% polyacrylonitrile, + 6% NaOH + 0.5% nitrilotrimethylphosphonic acid + 83.5% water

Emulsion solution + + 3% reagent containing 10% polyacrylonitrile + 6% NaOH + 25% nitrilotrimethylphosphonic acid + 59% oxen

Continuation of the table

1.03 39 16/30 4

1.03 60 25/40 24

45

1.03 47 20/36 10

21

1.03 40 17/32 6

14

1.03 41 24/51 16

42

1.03 48 30/49 40

Brlee 90

25

1.03 62 26/39 11

ten

1.03 24 11/19 6 emulsion solution + + 3% reagent containing 10% polyacrylonitrile, + 6% NaOH + 30% nitrilotrimethylphosphonic acid + 54% water Emulsion solution + reagent containing 20% polyacrylonitrile, + 6% KOH + 10% nitrilotrimethylphosphonic KYSLOT11 + 64% water Emulsion solution + + 3% reagent containing 80% hypane, + 20% nitrilotrimethylphosphonic acid Emulsion solution + + 3% reagent containing 10% polyacrylonitrile, + 10% sodium salt of nitro-nitrimethylphenol 80% water Emulsion solution + + 3% reagent containing 10% polyacrylate ijia, t 10t KaJineBoS salts of nitrilotrimethylphosphonic acid + 80% water Non-clay solution: 20% powdered metal + 5% water glass + 3% MADA + 72% water Non-clay solution + + 3% reagent containing 5% polyacrylonitrile, + 4% NaOH + 0.5% nor rilotrimethylphosphonic acid + 90.5% water Waterless solution + + 3% reagent containing 20% polyacrylonitrile., + 8% NaOH + 25% nit rilotrimethylphosphonic acid + 47% water Without mud + + 3% reagent containing 5% polyacrylonitrile, + 4% KOH +0.5 nitrilotrimethylphosphonic acid + 90.5% water

Continuation of the table 25 4 47 5 38 6 22 20 20 A clay-free solution + + 3% reagent containing 20% polyacrylonitrile, + 8% KOH + 25% nitrilotrimethylphosphonic acid + .47.% Water1.17 40 Gum solution + + 3% reagent containing 20% polyacrylonitrile, + 8% KOH + 25% sodium salt of nitrilotrimethylphosphonic acid + + 47% water- 1.17 40 A clay-free solution + + 3% reagent containing 20% polyacrylonitrile, + 8% MaOH + 25% potassium salt of nitrilomethylphosphonic acids + 47% water 1.17 40 Non-clay solution + + 3% hypana1.17 78

Non-clayey solution + + 3% reagent containing 80% hypane, + 20% nrilotrimethylphosphonic acid

Non-clayey solution + + 3% reagent containing 80% hypane, + 20% sodium salt nitrilotrime t or phos phonic acid

Non-clay Solution + 3% Reagent Containing 80% Hypane, + 20% Li-nitrilotrimethylphosphonic Acid Salt

Inhibited solution: 5% bentonite + 5% potassium chloride + 90% water

Inhibited solution

- 3% reagent containing 5% polyacrylonitrile, + 4% NaOH + 0.5%

1-nitrilotrimethylphosphonose acid + 90.5% water

Table continuation

13

8/21

40

12

9/21

40

8/22

12

40

12/18

40

More than 90

15

31 9/14 / 17/17 9/74 More than 90 1.05 37 10/15 1.05 30 7/10, 1, 05 35 8/12 1, 05 32 6/10 1.05 30 6/9

1.05 51 28/51 1.05 26 0/5 1.05 26 0/6

Inhibited solution + + 3% reagent, containing 8 p% of hypane, + 20% potassium salt of nitrilotrimethylphosphonic acid

Table continuation

13

13

12

14

15

7 26

More than 90

12

eleven

12

1/5

27

Claims (2)

1. Kister E.G. Chemical treatment of drilling fluids. M., Nedra, 1972, p. 190-198. 2. Paus K.F. Drilling mud M., 1973, p. 83