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Early-strength salt-resistant toughened styrene-butadiene latex and its preparation method and use

An early-strength, tough technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unsuitable for long-term storage, reduce the ease of operation, increase production costs, etc., to reduce permeability, promote water hydration rate, effect of promoting hydration degree

Active Publication Date: 2017-02-22
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a big disadvantage in industrialized production of styrene-butadiene latex, that is, for the gaseous raw material butadiene, pressurization equipment needs to be added during production; and for the liquid raw material polybutadiene emulsion, it is not suitable for long-term storage, which is to a large extent Increased production costs and reduced ease of operation

Method used

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  • Early-strength salt-resistant toughened styrene-butadiene latex and its preparation method and use
  • Early-strength salt-resistant toughened styrene-butadiene latex and its preparation method and use
  • Early-strength salt-resistant toughened styrene-butadiene latex and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of early-strength type anti-salt toughened styrene-butadiene latex comprises the steps:

[0039](1) Weigh the monomer by mass: the first part of styrene 18g, 2-acrylamide-2-methylpropanesulfonic acid 1g, the second part of styrene 35g, liquid polybutadiene 40g, butyl acrylate 6g total 100g;

[0040] (2) Add the first part of styrene, 2-acrylamide-2-methylpropanesulfonic acid, 0.3g sodium carbonate, 0.54g sodium lauryl sulfate, 0.22g azobisisobutylamidine hydrochloride to the container Salt and 42g deionized water were reacted for 60min at 75°C and 250r / min to obtain a core structure copolymer solution;

[0041] (3) The second part of styrene, liquid polybutadiene, butyl acrylate, and 3.6 g of an aqueous solution of sodium lauryl sulfate with a mass concentration of 2.4% were ultrasonicated at a power of 800W for 1 hour to obtain a mixed liquid;

[0042] (4) Add the mixed liquid obtained in step (3), 20g of deionized water, 0.42g of azobisisobuty...

Embodiment 2

[0045] The preparation method of early-strength type anti-salt toughened styrene-butadiene latex comprises the steps:

[0046] (1) Weigh the monomer by mass: the first part of styrene 20.5g, 2-acrylamide-2-methylpropanesulfonic acid 1.5g, the second part of styrene 25g, liquid polybutadiene 45g, butyl acrylate 8g, 100g in total;

[0047] (2) Add the first part of styrene, 2-acrylamide-2-methylpropanesulfonic acid, 0.5g sodium carbonate, 0.9g sodium lauryl sulfate, 0.43g azobisisobutylamidine hydrochloride to the container Salt and 48g of deionized water were reacted for 90min at 60°C and 200r / min to obtain a core structure copolymer solution;

[0048] (3) The second part of styrene, liquid polybutadiene and butyl acrylate, and 3.6 g of an aqueous sodium lauryl sulfate solution with a mass concentration of 2.4% were ultrasonicated at a power of 400W for 1.5 hours to obtain a mixed liquid;

[0049] (4) Add the mixed liquid obtained in step (3), 30g of deionized water, 0.80g of...

Embodiment 3

[0051] The preparation method of early-strength type anti-salt toughened styrene-butadiene latex comprises the steps:

[0052] (1) Weigh the monomer by mass: the first part of styrene 14g, sodium vinylbenzene sulfonate 1.5g, the second part of styrene 33.5g, liquid polybutadiene 50g, 2-acrylamide-2-methyl Propanesulfonic acid 1g, 100g in total;

[0053] (2) Add the first part of styrene, sodium vinylbenzenesulfonate, 0.4g sodium carbonate, 0.54g sodium lauryl sulfate, 0.12g azobisisobutylamidine hydrochloride and 45g deionized water to the container , under the conditions of 80°C and 300r / min, react for 60min to obtain a core structure copolymer solution;

[0054] (3) The second part of styrene, liquid polybutadiene and 2-acrylamide-2-methylpropanesulfonic acid, 3.6g mass concentration of 2.4% sodium lauryl sulfate aqueous solution, ultrasonic 1h at a power of 600W , to obtain a mixed liquid;

[0055] (4) Add the mixed liquid obtained in step (3), 27g of deionized water, 0....

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Abstract

The invention discloses early-strength type salt-tolerant toughening styrene-butadiene latex as well as a preparation method and application. The preparation method comprises the following steps: (1) weighing a first part of styrene, 2-acrylamide-2-methyl propane sulfonic acid, a second part of styrene, liquid polybutadiene and butyl acrylate; (2) adding the first part of styrene, 2-acrylamide-2-methyl propane sulfonic acid, sodium carbonate, a surfactant, an initiator and deionized water into a container for reaction to obtain a nuclear-structure copolymer; (3) performing ultrasonic treatment on the second part of styrene, liquid polybutadiene, butyl acrylate and an aqueous surfactant solution to obtain mixed liquid; and (4) adding the liquid, deionized water, initiator and a chain transfer agent into the nuclear-structure copolymer solution for reaction to obtain the early-strength type salt-tolerant toughening styrene-butadiene latex. The early-strength type salt-tolerant toughening styrene-butadiene latex disclosed by the invention is uniform in size and small in particle size, can promote the hydration speed and hydration degree of cement, fills tiny pores in the hardened cement slurry, improves the microstructure of the hardened cement slurry and has good gas channeling resistance.

Description

technical field [0001] The invention relates to an early-strength anti-salt toughened styrene-butadiene latex anti-gas channeling agent and a preparation method thereof, belonging to the field of oil field cementing engineering. Background technique [0002] As China's oil and gas resources exploitation enters the middle and later stages, the number of many complex wells, such as sidetracking wells, branch wells, small hole wells, thin oil layer wells and thermal recovery wells is increasing, and the formations that need to be sealed are more complex, making well cementing prone to occur. Leakage, plugging is difficult; a series of problems such as low temperature, oil-gas-water channeling, etc., especially at low temperature, the cement hydration rate is greatly reduced, so that the cement is in a state of gelation and weightlessness for a long time, the setting time becomes longer, and there are In the case of abnormal high pressure and oil, gas and water layers, the compr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/02C08F212/08C08F220/58C08F212/14C08F220/18C09K8/44
Inventor 郭锦棠肖明明冯亚凯
Owner TIANJIN UNIV