SU1142619A1 - Method of producing powered composition for buffer fluid - Google Patents

Abstract

METHOD FOR OBTAINING POWDERING MATERIAL - FOR BUFFER LIQUID, including mixing in the mixer hydrolyzed lignin humidity 60-65, soda ash or caustic soda and carboxymethylcellulose at a ratio of components (wt.%): Hydrolyzed lignin 87,0-90,090,09090, 90,090, -0, -0, 0, -0, 0, -0, 0, -0, 0, -0, 0, 20, -0.3, 30, -0.3, 30, -0.30, 0, 20, 100, 300, 30, 90, 0.3, 90, -04, 90, 90, 56, -04, 90, 90, 90, 77, 90, 50, 90, 90, 56, 90, 56, 90, 90) 1.7 and calcium or caustic soda, the rest, characterized in that, with a chain of increasing the yield of buffer liquid from one ton of material by increasing the solubility of the material in water, the hydrolysis lignin first mixed with soda or caustic soda at 70-90 C for 20-30 min, and then - with karboksimetiltsellkshozoy. (L

Description

The invention relates to the attachment of oil and gas wells. For cementing wells drilled using conventional drilling fluids, buffer liquids are needed that are capable of holding the well. A known method for producing a powdered material for a buffer liquid, concludes with mixing agrimus, soda ash and carboxymethylcellulose lj. The disadvantage of this method is the high moisture content (up to 50%) of the powdered material resulting in its sticking during storage. The closest technical solution to the invention is a method for preparing a powdered material for buffer liquid 2, which includes stirring in a mixer for 5 minutes ,, containing, in wt.%: Hydrolife lignin humidity 60-65% 87.0-90.0 Carboxymethyl1, 3-1.7. Calcined or caustic cellulose. The rest of the soda. The disadvantage of this method is that the material obtained is poorly soluble in water and consequently has a low gel-forming ability and a low yield of buffer liquid from one ton of material. The purpose of the invention is to increase the yield of liquid liquid from one ton of material by increasing the solubility of the material in water. This goal is achieved by the fact that according to the method of obtaining a powdery material for a buffer liquid, including mixing in a mixer hydrolyzed lignin with a moisture content of 60-65%, calcinic 9 or caustic soda and carboxymethylcellulose with the ratio of scientific research institutes of components, wt.%: Hydrolytic lignin 87.0 -90.0, carboxymethylcellulose 1.3-1.7 and soda ash or caustic soda, hydrolyzed lignin is first mixed with soda ash or caustic soda at 70-90 ° C for 20-30 minutes, and then with carboxymethyl lulose. The duration and temperature of the treatment of lignin with soda were selected by the viscosity of the buffer liquid prepared from a powder material by dissolving it in water. In tab. 1, the treatment regime of lignin with soda is given. Hot lignin treatment with soda increases the rate of chemical interaction of lignin with alkali, as a result of which the viscosity of the buffer liquid prepared from a porous material is significantly increased. Comparative data on the yield of buffer liquid from 1 ton of powdered material obtained by the prototype method (treatment of lignin with soda at a temperature of 23 + 3 C) and the proposed method are given in table. 2. Both liquids were prepared by mixing the powder with water for 0.5 h. With an increase in the mixing time of the powdered material with water for up to 1.5 h, the viscosity of the buffer liquid increases for the material obtained by the prototype method to 26 s and obtained by this method up to 43 s. Thus, increasing the viscosity of the buffer liquid by increasing the solubility of the powdered material obtained by the proposed method makes it possible to increase the yield of buffer liquid from 1 ton of material by about 1.5 times.

Table 1

Duration of treatment 20 25 30 lignin, min Conditional viscosity of the buffer liquid in 0.5 hours, 30 32 34 mixed with water, s

Consumption of water.

The method of preparation of the powder material

3 4,8

Prototype Proposed

table 2

Conditional viscosity of the output of the buffer fluid, ferrite fluid, with

3.66

22.5 25 5.33 20 25 30 20 25 30 38 40 42 38 41 44

Claims (1)

METHOD FOR PRODUCING POWDER MATERIAL. FOR A BUFFER LIQUID, including stirring in a mixer of hydrolytic lignin with a moisture content of 60-65%, soda ash or caustic soda and carboxymethyl tylcellulose with a ratio of components (wt.%): Hydrolytic lignin 87.0-90.0, carboxymethyl cellulose 1.3-1, 7 and calcined ennaya or caustic soda the rest, characterized in that, in order to increase the yield of buffer fluid from one ton of material by increasing the solubility of the material in water, the hydrolysis lignin is first mixed with calcined or caustic soda at 70-9 0 C for 20-30 minutes, and then with carboxy-3 simethyl cellulose. 1 142619