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A kind of water-soluble amphoteric hydrophobic polymer retarder and its preparation method and application

A technology of hydrophobic polymer and retarder, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor retardation efficiency, large temperature difference in long sealing section, etc., and achieve small and fast setting time gap. It has the effect of strength, strong temperature resistance and salt resistance

Active Publication Date: 2017-06-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When cementing deep and ultra-deep wells, the following problems are often encountered: ultra-high temperature, high pressure, low pressure, multiple pressure systems, large temperature differences in long sealing sections, salt-gypsum layers, high-pressure brine layers, small gaps, etc., such complex downhole Conditions pose a great challenge to cementing technology
However, its action direction is mainly to reduce water loss, and its retarding performance is poor.

Method used

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  • A kind of water-soluble amphoteric hydrophobic polymer retarder and its preparation method and application
  • A kind of water-soluble amphoteric hydrophobic polymer retarder and its preparation method and application
  • A kind of water-soluble amphoteric hydrophobic polymer retarder and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of preparation method of water-soluble amphoteric polymer retarder, comprises the steps:

[0040] (1) Take the monomer by mass:

[0041] Weigh 76g of 2-acrylamido-2-methylpropanesulfonic acid, 2g of itaconic acid, 19g of acrylic acid, 1g of N,N-dimethylacrylamide and 2g of octadecyldimethylallyl ammonium chloride ;

[0042] (2) Add monomers 2‐acrylamide‐2‐methylpropanesulfonic acid, itaconic acid, acrylic acid and N,N‐dimethylacrylamide to container 1, and then add 3.5 times the monomer mass in container 1 Deionized water (343g) was stirred at normal temperature to be dissolved to obtain solution one; in container two, octadecyl dimethyl allyl ammonium chloride and octadecyl dimethyl allyl chloride equivalent Deionized water (34g) with 17 times the ammonium mass was stirred at normal temperature to obtain solution 2;

[0043] (3) Mix solution 1 and solution 2 to obtain solution 3, adjust the pH of the solution to 3 with aqueous sodium hydroxide solution; add i...

Embodiment 2

[0046] A kind of preparation method of water-soluble amphoteric polymer retarder, comprises the steps:

[0047] (1) Take the monomer by mass:

[0048] Weigh 70 g of sodium vinylbenzene sulfonate, 10 g of itaconic acid, 14 g of acrylic acid, 5 g of N,N-dimethylacrylamide and 1 g of hexadecyldimethylallyl ammonium chloride;

[0049] (2) Add monomer sodium vinylbenzene sulfonate, itaconic acid, acrylic acid and N,N-dimethylacrylamide to container 1, and then add deionized water (198g) twice the weight of the monomer in container 1 , stir at room temperature to dissolve solution one; add hexadecyl dimethyl allyl ammonium chloride and 25 times the mass of hexadecyl dimethyl allyl ammonium chloride to container two Ionized water (25g), stirred at normal temperature to be dissolved to obtain solution 2;

[0050] (3) Mix solution 1 and solution 2 to obtain solution 3, adjust the pH of the solution to 6 with aqueous sodium hydroxide solution; add the initiator ammonium persulfate, reac...

Embodiment 3

[0053] A kind of preparation method of water-soluble amphoteric polymer retarder, comprises the steps:

[0054] (1) Take the monomer by mass:

[0055] Weigh 80g of 2‐acrylamido‐2‐methylpropanesulfonic acid, 4g of itaconic acid, 13g of acrylic acid, 1g of N,N-dimethylacrylamide and N‐(N‐propylacrylamide)‐N,N -Dimethylhexadecylammonium bromide 2g.

[0056] (2) Add monomers 2‐acrylamide‐2‐methylpropanesulfonic acid, itaconic acid, acrylic acid, N,N-dimethylacrylamide to container 1, and then add 2.2 times the monomer mass in container 1 Deionized water (215.6g), stirring at room temperature to dissolve solution 1; add N‐(N‐propylacrylamide)‐N,N‐dimethylhexadecylammonium bromide and equivalent to container 2 In deionized water (17g) with 8.5 times the mass of N-(N-propylacrylamide)-N,N-dimethylhexadecyl ammonium bromide, stir at room temperature to dissolve to obtain solution 2;

[0057] (3) Mix solution 1 and solution 2 to obtain solution 3, adjust the pH of the solution to 2....

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Abstract

The invention discloses a water soluble amphoteric hydrophobic polymer set retarder and a preparation method and an application thereof. The preparation method comprises the following steps: adding a monomer 2-acrylamido-2-methylpropanesulfonic acid or vinyl benzene sulfonate, itaconic acid, acrylic acid and N,N-dimethylacrylamide into a container I, then adding deionized water, and stirring to obtain a solution I; adding a quaternary ammonium salt and deionized water to a container II, and stirring to obtain a solution II; mixing the solution I and the solution II, and adjusting the pH to 2.8-7; and adding an initiator, carrying out a reaction, and thus obtaining the water soluble amphoteric hydrophobic polymer set retarder. The water soluble amphoteric hydrophobic polymer set retarder has the advantages of moderate solution viscosity, simple process, good compatibility with cement and other related auxiliary agents, and fast set cement strength development at low temperature; a thickening curve has good right-angle thickening performance; and the water soluble amphoteric hydrophobic polymer set retarder can be used for adjusting a setting state of cement at different temperatures.

Description

technical field [0001] The invention relates to a water-soluble amphoteric hydrophobic polymer retarder, a preparation method and application thereof, and belongs to the field of cement retarders for oil field cementing. Background technique [0002] With the continuous deepening of oil and gas exploration and development, complex wells, such as deep wells and ultra-deep wells, are increasing. Such wells have complex factors such as deep burial and high bottomhole temperature, resulting in a long one-time back-sealing section, top and bottom of the sealing section. The temperature difference is large, which puts forward higher requirements on the performance of cement slurry. When cementing deep and ultra-deep wells, the following problems are often encountered: ultra-high temperature, high pressure, low pressure, multiple pressure systems, large temperature differences in long sealing sections, salt-gypsum layers, high-pressure brine layers, small gaps, etc., such complex d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F212/14C08F220/06C08F222/02C08F220/54C08F226/02C08F220/60C09K8/467C04B24/16
CPCC04B24/163C04B2103/22C08F212/14C08F220/58C08F220/585C09K8/467C08F220/06C08F222/02C08F220/54C08F226/02C08F220/60
Inventor 郭锦棠石英曹磊
Owner TIANJIN UNIV
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