SU1114690A1 - Drilling mud - Google Patents

Abstract

DRILLING SOLUTION containing clay, starch, carboxymethylcellulose, starch and carboxymethylcellulose degradation inhibitors and water, characterized in that 4TOj in order to improve the quality of the solution by increasing its heat resistance under polymineral aggression to temperature, as an inhibitor of destruction, it contains oak extract, as an inhibitor of heat resistance, oak extract, under the conditions of polymineral aggression to temperature, it contains oak extract, as the inhibitors of destruction. spruce and sodium sulfite in the following ratio of ingredients, wt.%: 3.0-30.0 Clay 0.8-2.4 Starch Carboxymethyl 0, 7-1.8 celkhposa g Oak extract 0.5-2.0 willow or spruce (L 0.4-2.0 Sodium Sulfite Else e Water

Description

4 o

;about

o The invention relates to compositions of heat-resistant drilling fluids that are resistant to polymineral aggression and contain starch and carboxymethylcellulose (CMC) as water loss reducers at the same time. The well-known drilling fluid is resistant to polymineral aggression, containing clay, water, starch and CMC l. The disadvantage of this drilling mud is that it is applicable when drilling at a temperature not exceeding. Known drilling fluid containing clay, starch, carboxymethyl cellulose, krala malaria and carboxymethyl cellulose and wound degradation inhibitors 2. Drilling fluid containing clay, starch, carboxymethyl cellulose, starch inhibitors and carboxymethyl cellulose, and water are also known; - an increase in water loss during polymineral aggression under conditions of temperature up to 180 ° C. The purpose of the invention is to improve the honest solution by increasing its heat resistance under conditions of polymineral aggression to a temperature of 1 180. The goal is achieved by the fact that drilling mud containing clay, starch, carboxymethylcellulose starch destruction inhibitors and carboximethoxycellulose and water, as inhibitors of destruction, contains extract of oak, spruce or willow and sodium sulfite in the following ratio of ingredients, wt.%: Clay3-30 Starch 0.8-2.4 Carboxymethylcellulose0, 7-1.8 Extract of oak spruce or willow 0.5-2.0 Sulfate rub 0 , 4-2,0 Water Other, Example 1. 30 g of Kudin clay are suspended from 775 g of water and thoroughly mixed in a mixer. Then, B gum of starch, 7 g of CMC - 85/700, 150 g of sodium chloride, 15 g of magnesium chloride are added to the resulting suspension. The resulting mass was mixed thoroughly, after which the solvent was ready for use. Example 2. 30 g of Kudinovskiy clay are suspended in 766 g of water and thoroughly mixed in a mixer. Then, 8 g of starch, 7 g of CMC-85/700, 150 g of sodium chloride, 15 g of calcium chloride, 15 g of magnesium chloride, 5 g of oak extract and 4 g of sodium sulfite are added to the resulting suspension. The resulting mass is thoroughly mixed, after which the solution is ready for use. The table shows the comparative data on the treatment of drilling fluids with starch and CMC in the absence and presence of inhibitors of destruction. When added to a drilling fluid containing polymineral salts and treated with starch and CMC, vegetable tannins (oak extract of spruce or willow) up to 2.0% and sodium sulfite up to 2.0% (the combination of which is a synergistic mixture) provides heat resistance of drilling rigs. solutions up to 180 ° C (table). Drilling muds containing polymineral salts and treated with starch and CMC together with 2.0% vegetable tanning substance (extract of oak, spruce or willow) or processing starch and CMC together with 2, 0% sodium sulfite do not have heat resistance at the specified temperature. The introduction of vegetable tanning material (extract of oak, spruce or willow) and sodium sulfite into the drilling fluid containing polymineral salts and treated with starch and CMC in quantities less than 0.5 and 0.4%, respectively, does not provide the necessary thermal stability of the drilling mud. The introduction of vegetable tanning material (oak, spruce or willow extract) and sodium sulfite in quantities of more than 2.0% provides the necessary heat resistance, however, the structural and mechanical properties of the solution deteriorate sharply. Vegetable tannins (oak, spruce or willow extract) are industrial products that are water-soluble tanning extracts. Thus, oak extract is made in accordance with GOST 9527-60. The application of the proposed drilling fluid will reduce the consumption of scarce reagents - stabilizers CMC and starch.

Clay 3 sodium chloride 151 calcium chloride 1,5 | magnesium chloride 1.5; starch 0.8; CMC 0.7; water - the rest1, 28 10

1st solution + oak extract

0.5 + sodium sulfite 0,41,28 14

1st solution + oak extract

0.4 + sodium sulfite 0.31.28 13

1st solution + oak extract

2,2 + sodium sulfite 2,21,28 41

The solution of the 1st + oak extract 4 1.28 43

1st solution + sodium sulfite 41.28 12

Solution 1st + spruce extract

0.5 + sodium sulfite 0,41,28 15

Solution 1st willow extract

0.5 + sodium sulfite 0,41,28 12

Clay 16.5; sodium chloride 30; calcium chloride 3-, magnesium chloride 3; starch 1.6; CMC 1.25, spruce extract 1.25; sodium sulfite 1,2; water else1 3118

Clay 30; sodium chloride 30J calcium chloride 5; magnesium chloride 5; starch 2.4; CMC 1.8; spruce extract 2.0, sodium sulfite 2.0;

water - the rest 1.31 20

Clay 30; sodium chloride 30; calcium chloride 5; magnesium chloride 5, starch 2.4; CMC 1.8, aniline 2.0; sodium thiosulfate 2.0; water - the rest 1.31 21

6/9

9/12 3 1 10

6/12

1 10

63/99 3 1 10 69/115 3 1 10

3/9

1 10

0.93 1 10

3/9

1 10

12/2731 10

12/30 3 1 10

9/27 3 1 10

Table continuation

Clay 3, sodium chloride 15j calcium chloride 1.5, magnesium chloride 1.5, starch 0.8 KMTS 0.8, water - the rest

1st solution + oak extract 0.5 + sodium sulfite 0.4

1st solution + oak extract 0.4 + sodium sulfite 0.3

1st solution + oak extract 2.2 + sodium sulfite 2.2

Solution 1st + extract

oak 4

1st solution + sodium sulfite 4

Solution 1st + extract ate 0.5 + sodium sulfite 0.4

The solution of the 1st + extract of willow 0.5 sulfite nat1, 28 11 18/36 20 7 7 ri 0.4

Clay 16.5; sodium chloride 30; calcium chloride 3; magnesium chloride 3; starch 1.6; CMC 1.25; spruce extract 1.25; sodium sulfite 1.2; water - the rest

9 27/63 20 7 6.5 140 2

24 / 395,5110170

33 / 426,519,5170

18/271968160

72/1214110170

63/1121759170

18/36 2077170

9/125110170

170

16 15/36 5.5 1 10

170 5S 10 Clay 30} sodium chloride 30; calcium chloride 5; magnesium chloride 5; starch 2.4 CMC 1.8; spruce extract 2.0; sodium sulfite 1.31 18 2.0; water - the rest is 1.30 20

Clay 30; sodium chloride 30; calcium chloride 5; magnesium chloride 5; starch 2.4; CMC 1.8; aniline 2.0; sodium thiosulfate 2.0j water - os15 / 21 7.5 1 9.5 180 2 18/27 9.0 1 9.0 180 4

Claims (1)

A DRILLING MIXTURE containing clay, starch, carboxymethyl cellulose, inhibitors of starch and carboxymethyl cellulose and water, characterized in that, in order to improve the quality of the solution by increasing its temperature resistance under conditions of polymineral aggression to a temperature of 180 ° C, it contains an extract as destruction agents oak, willow or spruce and sodium sulfite in the following ingredients, wt.%: Clay Starch Carboxymethyl Cellulose Oak Extract? Willow or Spruce Sodium Sulphite Water in the ratio of 3.0-30.0 0.8-2.4 0.7-1.8 0.5-2.0 0.4-2.0 Rest with >