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Macromolecular polymer encapsulating flocculant for drilling fluids and preparation method of encapsulating flocculant

A technology of high molecular polymer and drilling fluid, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of easy delamination and deterioration, poor salt resistance, unstable liquid emulsion type coated flocculant, etc. , to achieve the effect of reducing fluid loss and lubrication, strong emulsion stability, and improving the effect of coating inhibition

Active Publication Date: 2019-05-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a high-molecular polymer emulsion-type coated flocculant for drilling fluids and a preparation method thereof; it solves the problem of instability, easy delamination and deterioration, and poor salt resistance of the existing liquid emulsion-type coated flocculant. question

Method used

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  • Macromolecular polymer encapsulating flocculant for drilling fluids and preparation method of encapsulating flocculant
  • Macromolecular polymer encapsulating flocculant for drilling fluids and preparation method of encapsulating flocculant
  • Macromolecular polymer encapsulating flocculant for drilling fluids and preparation method of encapsulating flocculant

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Embodiment 1

[0029] (1) Preparation of raw materials: Under the condition that the temperature does not exceed 35°C, adjust the pH value of acrylic acid to 8.0 with 50% (wt%) sodium hydroxide to form an aqueous solution of sodium acrylate for later use, and take 2-acrylamide-2-methanol propanesulfonic acid is formulated into a 50% (wt%) aqueous solution and the pH value is adjusted to 8.0 with 50% (wt%) sodium hydroxide to form a 2-acrylamide-2-methylpropanesulfonic acid sodium salt aqueous solution for subsequent use, and propylene Amide is prepared as a 50% (wt%) aqueous solution for subsequent use, and vinyltriethoxysilane is prepared as a 50% (wt%) aqueous solution for subsequent use;

[0030] (2) Sodium acrylate aqueous solution, 2-acrylamide-2-methylpropanesulfonic acid sodium salt aqueous solution, 50% (wt%) acrylamide aqueous solution, 50% (wt%) vinyltriethoxysilane, 3# white Oil, two emulsifiers (5:1) SP-80, OP-10 mass ratio of 25:5:25:2.0:30:2.5:0.5 are added to the reactor;

[...

Embodiment 2

[0035] (1) Preparation of raw materials: Under the condition that the temperature does not exceed 35°C, adjust the pH value of acrylic acid to 8.0 with 50% (wt%) sodium hydroxide to form an aqueous solution of sodium acrylate for later use, and take 2-acrylamide-2-methanol propanesulfonic acid is formulated into a 50% (wt%) aqueous solution and the pH value is adjusted to 8.0 with 50% (wt%) sodium hydroxide to form a 2-acrylamide-2-methylpropanesulfonic acid sodium salt aqueous solution for subsequent use, and propylene The amide is prepared as a 50% (wt%) aqueous solution for subsequent use, and the silane coupling agent is prepared as a 50% (wt%) aqueous solution for subsequent use;

[0036] (2) Sodium acrylate aqueous solution, 2-acrylamide-2-methylpropanesulfonic acid sodium salt aqueous solution, 50% (wt%) acrylamide aqueous solution, 50% (wt%) vinyltriethoxysilane, 3# white Oil, two kinds of emulsifiers (5:1) SP-80, OP-10 are added to the reaction kettle according to the...

Embodiment 3

[0041] (1) Preparation of raw materials: Under the condition that the temperature does not exceed 35°C, adjust the pH value of acrylic acid to 8.0 with 50% (wt%) sodium hydroxide to form an aqueous solution of sodium acrylate for later use, and take 2-acrylamide-2-methanol propanesulfonic acid is formulated into a 50% (wt%) aqueous solution and the pH value is adjusted to 8.0 with 50% (wt%) sodium hydroxide to form a 2-acrylamide-2-methylpropanesulfonic acid sodium salt aqueous solution for subsequent use, and propylene The amide is prepared as a 50% (wt%) aqueous solution for subsequent use, and the silane coupling agent is prepared as a 50% (wt%) aqueous solution for subsequent use;

[0042] (2) Sodium acrylate aqueous solution, 2-acrylamide-2-methylpropanesulfonic acid sodium salt aqueous solution, 50% (wt%) acrylamide aqueous solution, 50% (wt%) vinyltriethoxysilane, 3# white Oil, two kinds of emulsifiers (5:1) SP-80, OP-10 are added to the reaction kettle according to the...

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Abstract

The invention discloses a macromolecular polymer emulsion encapsulating flocculant for drilling fluids and a preparation method of the encapsulating flocculant. The macromolecular polymer emulsion encapsulating flocculant for the drilling fluids is prepared from acrylamide, sodium acrylate, sodium 2-acrylamide-2-methylpropane sulfonate and a silane coupling agent through emulsion polymerization. The preparation method of the encapsulating flocculant comprises an emulsification process and a polymerization process; in the emulsification process, acrylamide, sodium acrylate, sodium 2-acrylamide-2-methylpropane sulfonate, the silane coupling agent and an emulsifier are stirred under the shield of nitrogen, and an emulsion is obtained; in the polymerization process, the emulsion is subjected to a polymerization reaction after an initiator is dropwise added. The problems that existing liquid emulsion encapsulating flocculants are instable, prone to layering and deterioration and poor in salt resistance are solved.

Description

technical field [0001] The invention relates to the technical field of coating flocculants in petrochemical industry, in particular to the preparation method of AM / AANa / AMPS multiple copolymer emulsion strong coating flocculants. Background technique [0002] Coating flocculant is an important additive used in the drilling fluid system. Its function is to effectively coat the cuttings, prevent the hydration and dispersion of the cuttings and mud shale, and prevent the collapse of the well wall. A protective film is formed on the surface to prevent drill cuttings from adhering to each other and increasing the screening resistance. [0003] The brine drilling fluid system has stronger inhibition than the freshwater drilling fluid system, which can better inhibit clay hydration, protect the stability of the wellbore wall, and better realize drilling safety and oil and gas layer protection. As an important part of the brine system, the coated flocculant can largely determine th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F220/58C08F230/08C09K8/035
Inventor 孙敏刘永贵陈柏山杨决算吴广兴李光磊齐悦于兴东
Owner BC P INC CHINA NAT PETROLEUM CORP
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