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Flow pattern modifier copolymer for drilling fluid and preparation method thereof

A technology of flow regulator and copolymer, which is applied in the field of drilling fluid, can solve the problems that the temperature resistance can only reach 120 ℃, reduce the working efficiency of drilling fluid, etc.

Active Publication Date: 2021-04-20
BEIJING SHIDABOCHENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flow pattern regulator can be fully compatible with solid-free water-based drilling fluid, but the temperature resistance can only reach 120°C
[0006] In addition, these flow regulators are usually solid powders. Due to their high molecular weight, they need to be added slowly and stirred for a long time to fully disperse in field application, which objectively reduces the working efficiency of drilling fluids.

Method used

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  • Flow pattern modifier copolymer for drilling fluid and preparation method thereof
  • Flow pattern modifier copolymer for drilling fluid and preparation method thereof
  • Flow pattern modifier copolymer for drilling fluid and preparation method thereof

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preparation example Construction

[0037] The embodiment of the present invention also proposes a preparation method of a flow regulator copolymer for drilling fluid, comprising the following steps:

[0038] (1) Under normal temperature conditions, water, acrylic acid, potassium hydroxide, sodium acetate, DMC, DMAM, and Tween 80 were mixed to prepare an aqueous phase;

[0039] (2) Under normal temperature conditions, white oil and Span 80 are mixed to prepare an oil phase;

[0040] (3) fully mixing the water phase and the oil phase to obtain an emulsion base liquid;

[0041] (4) Put the emulsion base liquid in the reaction kettle, add ammonium persulfate as an initiator after nitrogen filling, and react; after the reaction is finished, the product can be obtained by cooling.

[0042] Specifically, the normal temperature of step (2) may be 25°C.

[0043] Specifically, the reaction condition of step (4) is: constant temperature reaction at 50° C. for 20 h.

[0044] The embodiment of the present invention prepa...

Embodiment 1

[0046] Example 1 A flow regulator copolymer XZ-CT for drilling fluid, consisting of the following components in parts by weight:

[0047] Acrylic acid 22 parts; DMAM 6 parts, DMC 11 parts, potassium hydroxide 8 parts, sodium acetate 0.02 parts, ammonium persulfate 0.04 parts, Span 80 3 parts, Tween 80 0.1 parts, water 35 parts, white oil 16 parts.

[0048]The preparation method of the XZ-CT of flow regulator copolymer for drilling fluid comprises the following steps:

[0049] (1) At room temperature of 25°C, water, acrylic acid, potassium hydroxide, sodium acetate, DMC, DMAM, and Tween 80 were mixed to prepare an aqueous phase;

[0050] (2) At room temperature of 25°C, mix white oil and Span 80 to prepare the oil phase;

[0051] (3) fully mixing the water phase and the oil phase to obtain an emulsion base liquid;

[0052] (4) Put the emulsion base liquid in a reaction kettle, add ammonium persulfate as an initiator after nitrogen filling, and react at a constant temperature...

Embodiment 2

[0053] Example 2 A flow regulator copolymer XZ-CT for drilling fluid, consisting of the following components in parts by weight:

[0054] 20 parts of AA, 4 parts of DMAM, 10 parts of DMC, 7 parts of potassium hydroxide, 0.02 parts of sodium acetate, 0.04 parts of ammonium persulfate, 803 parts of Span, 800.1 parts of Tween, 38 parts of water, and 19 parts of white oil.

[0055] The preparation method of the XZ-CT of flow regulator copolymer for drilling fluid comprises the following steps:

[0056] (1) At room temperature of 25°C, water, acrylic acid, potassium hydroxide, sodium acetate, DMC, DMAM, and Tween 80 were mixed to prepare an aqueous phase;

[0057] (2) At room temperature of 25°C, mix white oil and Span 80 to prepare the oil phase;

[0058] (3) fully mixing the water phase and the oil phase to obtain an emulsion base liquid;

[0059] (4) Put the emulsion in a reaction kettle, add ammonium persulfate as an initiator to react after filling with nitrogen; after the...

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Abstract

The invention provides a flow pattern regulator copolymer for drilling fluid and a preparation method thereof, belonging to the technical field of drilling fluid. The polymer is composed of the following raw materials in parts by mass: 15-25 parts of acrylic acid; 2-12 parts of dimethylaminoethyl methacrylate; 5-15 parts of methacryloyloxyethyltrimethylammonium chloride; 2-10 parts of potassium hydroxide; 0.01-0.1 parts of sodium acetate; 0.01-0.1 parts of ammonium persulfate; 1-6 parts of Span 80; 0.01-0.2 parts of Tween 80; 35-40 parts of water; 10-30 parts of white oil share. The flow regulator copolymer is mainly used in drilling fluid, and the heterocharged polyelectrolyte in the obtained product can form a large number of microstructures through self-assembly, which improves the structural strength of the drilling fluid, thereby improving the viscosity-increasing and shear-lifting effects of the drilling fluid. In addition, the obtained flow regulator copolymer has excellent salt and temperature resistance properties.

Description

technical field [0001] The invention belongs to the technical field of drilling fluids, and in particular relates to a flow pattern regulator copolymer for drilling fluids and a preparation method thereof. Background technique [0002] Drilling fluid is an important fluid used in drilling engineering, which has an important impact on the safety and quality of drilling. Flow regulator (also known as shear lifting agent) is one of the components of drilling fluid, which is mainly used to adjust the rheology of drilling fluid and ensure the smooth progress of drilling process. However, under high-salt and high-temperature conditions, it is difficult to adjust the rheological properties of water-based drilling fluids, which are prone to insufficient drilling fluid viscosity and shear force, excessive performance decay, and even loss of suspension and carrying capacity, resulting in barite settlement and other problems. A series of vicious consequences. [0003] At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/34C09K8/035C09K8/36
CPCC08F220/06C09K8/035C09K8/36C08F220/34
Inventor 罗绪武全晓虎段江
Owner BEIJING SHIDABOCHENG TECH