Fluid loss additive for boring fluid

A fluid loss reducer and drilling fluid technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as the influence of drilling fluid viscosity, high production cost, and thickening effect.

Inactive Publication Date: 2006-07-26
XINJIANG SANJING DERUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has an effect on the viscosity of drilling fluid (thickening effect), and it is used for low-solid drilling fluid. The production cost is high and the production process is complicated.

Method used

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  • Fluid loss additive for boring fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. Weak acid and alkali reaction: take 5 tons of reactor as base weight ratio (weight ratio)

[0022] With the ratio of water: humic acid: sodium hydroxide: sulfonated pitch: hydroxyethyl cellulose: polyacrylamide: water-soluble silicone oil: formaldehyde, add water 10 into the reaction kettle, start stirring, slowly add sodium hydroxide 0.6 and stir After dissolving, add humic acid 2, raise the temperature to 80°C, control the temperature at 80°C, and react for 2 hours.

[0023] b. Copolymerization reaction

[0024] Add 0.7 sulfonated pitch, 0.1 hydroxyethyl cellulose, 0.04 polyacrylamide, and 0.05 water-soluble silicone oil to the reaction kettle, control the temperature at 75°C, and disperse the materials uniformly for 1 hour, then add formaldehyde 0.35, raise the temperature to 80°C, and control The temperature is 80°C, and the reaction is 3h.

[0025] c. The dry water content is less than 15%, crushed (the remainder of the standard sieve with a diameter of 2.00mm...

Embodiment 2

[0027] a. Weak acid and alkali reaction: based on 5 tons of reactor (weight ratio)

[0028] With the ratio of water: humic acid: sodium hydroxide: sulfonated pitch: hydroxyethyl cellulose: polyacrylamide: water-soluble silicone oil: formaldehyde, add water 11 into the reaction kettle, start stirring, slowly add sodium hydroxide 0.62 and stir After dissolving, add humic acid 2.5, raise the temperature to 80°C, control the temperature at 85°C, and react for 2.5h.

[0029] b. Copolymerization reaction

[0030] Add 0.75 sulfonated pitch, 0.15 hydroxyethyl cellulose, 0.05 polyacrylamide, and 0.06 water-soluble silicone oil to the reaction kettle, control the temperature at 80°C, and disperse the materials uniformly for 1 hour, then add formaldehyde 0.36, raise the temperature to 80°C, and control The temperature was 85°C and the reaction was 3.5h.

[0031] c. The dry water content is less than 15%, crushed (the remainder of the standard sieve with a diameter of 2.00mm is less tha...

Embodiment 3

[0033] a. Weak acid and alkali reaction: based on 5 tons of reactor (weight ratio)

[0034] With the ratio of water: humic acid: sodium hydroxide: sulfonated pitch: hydroxyethyl cellulose: polyacrylamide: water-soluble silicone oil: formaldehyde, add water 12 to the reaction kettle, start stirring, slowly add sodium hydroxide 0.62 and stir Until dissolved, then add humic acid 3, raise the temperature to 80°C, control the temperature at 90°C, and react for 3h.

[0035] b. Copolymerization reaction

[0036] Add 0.8 sulfonated pitch, 0.2 hydroxyethyl cellulose, 0.06 polyacrylamide, and 0.07 water-soluble silicone oil to the reaction kettle, control the temperature at 85°C, and disperse the materials uniformly for 1 hour, then add formaldehyde 0.39, raise the temperature to 80°C, and control The temperature was 90°C and the reaction was 4h.

[0037] c. The dry water content is less than 15%, crushed (the remainder of the standard sieve with a diameter of 2.00mm is less than 5%),...

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PUM

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Abstract

The invention relates to a fluid loss control agent for drilling fluid, which is prepared through reacting natural humic acid with sodium-hydroxide to obtain humic sodium salts, then carrying out reduction copolymerization with sulfonated asphalt, hydroxyethyl cellulose, polyacrylamide, water-soluble silicon oil AND methyl aldehyde.

Description

technical field [0001] The invention relates to a fluid loss reducer for well drilling Background technique [0002] The main components of oilfield drilling mud are common soil and water, and various auxiliary chemical additives. In the process of continuous drilling, the phenomenon of water infiltrating into the formation is called dehydration. Excessive water loss per unit time will bring a series of adverse consequences: the collapse of the well wall, the shrinkage of the well diameter and the thickening of drilling fluid, etc., resulting in pipe sticking Wait for the occurrence of a vicious accident. The fluid loss control agent contains adsorption groups and hydration groups that can adsorb with clay, which can change the properties of the mud cake on the wall of the well: the treatment agent adsorbs on the surface of large clay particles to form a protective film, and the fine clay particles adsorb On the large chain link of the treatment agent, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/12C09K8/035
Inventor 谭光伟
Owner XINJIANG SANJING DERUN TECH
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