Method for preparing rapidly crosslinkable and easily breakable macromolecule thickener

A polymer and thickener technology, applied to drilling equipment, etc., can solve the problems of difficult removal of solid powder, long storage period, low emulsion stability, etc., and achieve low gel filtration loss and low cross-linking environmental requirements Harsh, good viscosity and temperature stability

Inactive Publication Date: 2005-08-17
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Emulsion products obtained by traditional emulsion methods: synthesis is difficult, the stability of the emulsion itself is low, and the storage period is generally not long
[0010] The amount of emulsifier is relatively large, sometimes it is necessary to add co-emulsifier, the dispersion medium is oil phase, the cost is high, it is difficult to remove when preparing solid powder, and it is easy to cause secondary pollution during use

Method used

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  • Method for preparing rapidly crosslinkable and easily breakable macromolecule thickener
  • Method for preparing rapidly crosslinkable and easily breakable macromolecule thickener
  • Method for preparing rapidly crosslinkable and easily breakable macromolecule thickener

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In the 250ml four-necked bottle, add 30 parts of white oil by mass, 4 parts of Span80, 1 part of OP-7, 1 part of OS-15, 1 part of methyl acrylate, and then add 80 parts of water phase (the water Contain 10 parts of distilled water in the phase, 20 parts of acrylamide, 25 parts of acrylic acid, 25 parts of 25wt% ammonia water); 2 Oxygen was exhausted for 0.5 hours, 0.02 part of ammonium persulfate was added, the reaction was initiated by heating to 40° C., and the polymerization reaction was carried out for 5 hours to obtain a uniform and stable inverse emulsion product.

Embodiment 2～15

[0034] The contents of acrylamide, acrylic acid, and N, N-methylenebisacrylamide were changed respectively, and the polymerization reaction as in Example 1 occurred to obtain a series of inverse emulsion products, which were characterized. The results are listed in Table 1:

[0035] Reality

Embodiment 16

[0037] Dissolve latex or solid powder in water to prepare a 1wt% aqueous solution, let it stand for 20 minutes to increase the viscosity, adjust the pH value to 5-7, and add Cr with a mass ratio of 0.6‰ 3+ The cross-linking agent is cross-linked at a room temperature of 25°C to obtain a thickener jelly.

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Abstract

The fast crosslinked and easily cracking anionic polymer thickener has the structural expression I. It is prepared with composition of sorbitan fatty acid ester, emulsfier NP and allcyl polyoxyethylene ether non-ionic emulsifier as emulsifer, acrylamide, acrylic acid or methyl acrylic acid, and N, N-methylene diacrylamide as monomer, as well as water, oil, alcohol, ammonium persulfate and hexane diamine adipate, and through polymerization in reverse phase emulsion system to obtain homogeneous stable reverse phase emulsion, and further crosslinking to obtain thickener jelly.

Description

technical field [0001] The invention relates to a rapid cross-linking and easy gel-breaking anionic polymer thickener used for oilfield water shutoff, tertiary oil recovery and oilfield drilling and fracturing and a preparation method. Background technique [0002] Today, when energy resources are gradually scarce, how to maximize the use of existing resources has become a hot research topic. As an important energy resource, petroleum occupies an indispensable position in social development. Tertiary oil recovery and fracturing technology account for most of the proportion in modern oilfield production increase and efficiency increase schemes, and thickener plays an indispensable role in it. Polymer thickeners are now developed from natural polymers to synthetic polymer thickeners. Synthetic polymer thickeners have the characteristics of less dosage, high efficiency, low toxicity, storage resistance, and no deterioration; synthetic polymer thickeners The research focuses on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 高庆张国杰周庆涛徐祖顺程时远
Owner HUBEI UNIV
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