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A kind of cutting agent for water-based drilling fluid and preparation method thereof

A technology of water-based drilling fluid and cutting agent, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of excessive viscosity increasing effect and low temperature resistance, and achieve low apparent viscosity, high Dynamic to plastic ratio, the effect of good temperature resistance

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of excessive viscosity increasing effect and low temperature resistance (≤150°C) existing in existing water-based drilling fluid shear-lifting agents, the present invention provides a shear-lifting agent for water-based drilling fluids, specifically Said, relate to a kind of cutting agent for water-based drilling fluid and preparation method thereof

Method used

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  • A kind of cutting agent for water-based drilling fluid and preparation method thereof
  • A kind of cutting agent for water-based drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Preparation of reactive 4-vinyl-1-(3-sulfopropyl)pyridine ylide monomer: take 52.55kg of tetravinylpyridine distilled under reduced pressure and add it to a reaction kettle with a volume of 1 cubic meter , and then slowly add 67.15kg of 1,3-propane sultone to the reaction kettle, control the temperature in the reaction kettle not to exceed 40°C during the addition process, add the required amount of 1,3-propane sultone and After stirring until the above-mentioned raw material mixture forms a uniform solution, heat the temperature of the reactor to 80°C and react at this temperature for 24 hours. After the reaction is completed, the temperature of the reactant is lowered to room temperature, and filtered. Wash 3 times, then transfer the resulting solid powder to a vacuum drying oven and dry at 50°C for 24 hours to obtain the reactive 4-vinyl-1-(3-sulfopropyl)pyridine ylide of the present invention Monomer (Monomer D).

Embodiment 2

[0047] Add 700 parts of deionized water to a reactor equipped with a stirrer, a temperature controller, an air duct and a reflux condenser, and add 54 parts of 2-acrylamide-2-methylpropanesulfonic acid (monomer A) under stirring, Stir until the 2-acrylamide-2-methylpropanesulfonic acid is completely dissolved, adjust the pH value of the solution to 7 with 30% sodium hydroxide solution, and add 36 parts of reactive 4-vinyl-1-(3-sulfopropyl) Pyridine ylide monomer (monomer D), add 1.8 parts of sodium chloride, stir until 4-vinyl-1-(3-sulfopropyl)pyridine ylide monomer and sodium chloride are completely dissolved, then add 36 Parts of N-vinylpyrrolidone (monomer B) and 54 parts of methacryloyloxyethyltrimethylammonium chloride (monomer C), add 120 parts of deionized water, then adjust with 30% sodium hydroxide solution The pH value of the monomer solution was 9, and finally 1.8 parts of pentaerythritol was added and stirred until the pentaerythritol was completely dissolved.

[...

Embodiment 3

[0050] Add 700 parts of deionized water to the reactor equipped with stirrer, temperature controller, gas guide pipe and reflux condenser, add 45 parts of 2-acrylamide-2-methylpropanesulfonic acid (monomer A) under stirring, Stir until the 2-acrylamide-2-methylpropanesulfonic acid is completely dissolved, adjust the pH value of the solution to 7 with 30% sodium hydroxide solution, and add 45 parts of reactive 4-vinyl-1-(3-sulfopropyl) Pyridine ylide monomer (monomer D), add 2.2 parts of sodium chloride, stir until 4-vinyl-1-(3-sulfopropyl)pyridine ylide monomer and sodium chloride are completely dissolved, then add 36 Parts of N-vinylpyrrolidone (monomer B) and 54 parts of methacryloyloxyethyltrimethylammonium chloride (monomer C), add 120 parts of deionized water, then adjust with 30% sodium hydroxide solution The pH value of the monomer solution was 9, and finally 1.8 parts of pentaerythritol was added and stirred until the pentaerythritol was completely dissolved.

[0051]...

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Abstract

The present invention relates to a kind of cutting agent for water-based drilling fluid and a preparation method thereof in the field of oil drilling working fluid; the cutting agent for water-based drilling fluid comprises the following components in weight percentage: 25% to 40% of Monomer A; 10% to 25% of monomer B; 25% to 40% of monomer C; 10% to 25% of monomer D; wherein, monomer A is selected from 2-acrylamide-2-methyl Propanesulfonic acid, at least one of 2-acryloyloxy-2-methylpropanesulfonic acid, acryloyloxybutanesulfonic acid, 2-acrylamide-2-phenylethanesulfonic acid; monomer B is N- Vinylpyrrolidone; Monomer C is selected from methacryloxyethyltrimethylammonium chloride or dimethyldiallylammonium chloride; Monomer D is reactive 4‑vinyl‑1‑(3‑ Sulfopropyl) pyridinium salt; the water-based drilling fluid of the present invention has good cutting performance and temperature resistance, and the temperature resistance can reach 150 ° C, and can be used as a cutting agent for oil drilling fluids. Improve the suspension stability of the working fluid to the lightening agent or weighting agent, and enhance the system's rock-carrying ability and wellbore purification ability.

Description

technical field [0001] The invention relates to the field of petroleum drilling working fluids, and more particularly relates to a cutting agent for water-based drilling fluids and a preparation method thereof. Background technique [0002] Cutting agent is a core treatment agent for drilling fluid. Its main function is to increase the shear force of the drilling fluid system, enhance the cuttings carrying capacity of the drilling fluid, and improve the wellbore purification effect of the drilling fluid. In addition, in low-density or high-density drilling fluids, it is often necessary to add solid-phase materials such as hollow microbead lightening agents or barite weighting agents. Due to the density difference between the solid-phase materials and the drilling fluid, in order to prevent the lightening agent from floating or For the weighting agent to settle, it is necessary to increase the shear force of the drilling fluid to enhance the suspension performance of the dril...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C08F220/58C08F226/06C08F220/34C08F226/10
CPCC08F220/34C08F220/58C08F226/06C09K8/035C08F220/585C08F226/10
Inventor 赵素丽杨小华杨帆陈铖金军斌钱晓琳
Owner CHINA PETROLEUM & CHEM CORP
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