A kind of natural polymer fluid loss reducer

A technology of natural polymer and filtrate reducer, which is applied in the field of natural polymer fluid loss reducer and its preparation, can solve the problems of poor heat resistance of xanthan gum, etc., to increase the success rate of grafting, improve the tolerance and Good stability and anti-filtration effect

Active Publication Date: 2021-07-30
山东红锦石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problem of poor heat resistance of the natural polymer raw material xanthan gum, the present invention provides a natural polymer fluid loss reducer, specifically, the natural polymer xanthan gum is used as the main raw material, and the xanthan gum is improved by modification treatment. Heat resistance of raw rubber

Method used

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  • A kind of natural polymer fluid loss reducer
  • A kind of natural polymer fluid loss reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Preparation of natural polymer fluid loss reducer:

[0058] S1. take by weighing the grafting agent 50 weight parts that are made up of maleimide, sodium p-styrenesulfonate and add 500 weight parts of water, wherein the mass ratio of maleimide and sodium p-styrenesulfonate is 1: 1.5, and an appropriate amount of sodium hydroxide solution to adjust the solution to be alkaline and set aside;

[0059] S2. Weigh 0.05 parts by weight of dicumyl peroxide (DCP) and 0.01 parts by weight of N,N-methylenebisacrylamide as a crosslinking agent, set aside;

[0060] S3. take potassium persulfate and water, be made into the solution that mass fraction is 0.5% as initiator, stand-by;

[0061] S4. Take by weighing 1.2 parts by weight of xanthan gum and 100 parts by weight of water and place them in the reaction vessel for mixing. The resulting mixed solution is subjected to high-speed shear processing to prepare xanthan gum solution. If the temperature is high enough to cause the degr...

Embodiment 2

[0065] Preparation of natural polymer fluid loss reducer:

[0066] S1. take by weighing grafting agent 60 weight parts that are made up of maleimide, sodium p-styrenesulfonate and add 600 weight parts of water, wherein the mass ratio of maleimide and sodium p-styrenesulfonate is 1: 2, and an appropriate amount of potassium hydroxide solution to adjust the solution to be alkaline, and set aside;

[0067] S2. Weigh 0.17 parts by weight of dicumyl peroxide (DCP) and 0.03 parts by weight of N,N-methylenebisacrylamide as a crosslinking agent for use;

[0068] S3. take potassium persulfate and water, be made into the solution that mass fraction is 0.5% as initiator, stand-by;

[0069] S4. Weigh 1.5 parts by weight of xanthan gum and 150 parts by weight of water and place them in a reaction vessel for mixing, then carry out high-speed shearing treatment to the resulting mixed solution, and at the same time, in order to prevent high-speed shearing from increasing the temperature, the...

Embodiment 3

[0073] Preparation of natural polymer fluid loss reducer:

[0074] S1. take by weighing the grafting agent 55 weight parts that are made up of maleimide, sodium p-styrene sulfonate and add 550 weight parts of water, wherein the mass ratio of maleimide and sodium p-styrene sulfonate is 3: 4, and an appropriate amount of sodium hydroxide solution to adjust the solution to be alkaline, and set aside;

[0075] S2. Weigh 0.12 parts by weight of dicumyl peroxide (DCP) and 0.03 parts by weight of N,N-methylenebisacrylamide as a crosslinking agent for use;

[0076] S3. take potassium persulfate and water, be made into the solution that mass fraction is 0.5% as initiator, stand-by;

[0077] S4. Weigh 1.2 parts by weight of xanthan gum and 120 parts by weight of water and place them in a reaction vessel for mixing, then carry out high-speed shearing treatment to the resulting mixed solution, and at the same time, in order to prevent high-speed shearing from increasing the temperature a...

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Abstract

The invention relates to the technical field of fluid loss control agents, in particular to a natural polymer fluid loss control agent, which is a modified xanthan gum, and its specific preparation method is to form xanthan gum into solution, the solution is subjected to high-speed shearing to fully expose the graftable sites, maleimide and sodium p-styrenesulfonate are used as grafting agents, and dicumyl peroxide, N, N-ethylene sulfonate are used as grafting agents. Methylbisacrylamide is used as a crosslinking agent, potassium persulfate is used as an initiator, and the temperature is controlled during high-speed shearing, and microwaves are used as an auxiliary means in the modification reaction to prepare a natural polymer fluid loss reducer. The fluid loss agent has good high temperature resistance. The preparation method of the invention uses natural polymer polysaccharides as raw materials, has simple and easy operation and high conversion rate.

Description

technical field [0001] The invention belongs to the technical field of fluid loss control agents, and in particular relates to a natural polymer fluid loss control agent and a preparation method thereof. Background technique [0002] Fluid loss reducer is a treatment agent that acts on the well wall of drilling fluid to reduce its permeability, thereby effectively reducing fluid loss and ensuring safe production in oil fields. At present, there are many types of fluid loss control agents in practical applications, and the types of fluid loss control agents commonly used are mostly polymers and modified natural materials. [0003] Xanthan gum is an anionic bioheteropolysaccharide with a primary structure similar to cellulose, including a D-glucosyl main chain connected by β-1, 4 bonds and a side chain containing three sugar units. The side chain consists of Two D-mannose and one D-glucuronic acid are connected alternately. Xanthan gum molecules contain - COO － , -OH and ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F222/40C08F212/14C08F222/38C09K8/035
CPCC08F251/00C09K8/035C08F222/40C08F212/30C08F222/385
Inventor 赵沿东蔡维良程跃凤郭淑华赵倩
Owner 山东红锦石油技术开发有限公司
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