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A kind of modified brine drag reducer and preparation method thereof

A technology of drag reducer and brine, applied in the direction of mechanical equipment, fluid flow, etc., to achieve the effect of good salt resistance, simple synthesis, good temperature and salt resistance

Active Publication Date: 2017-09-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, poly(acrylamide-2-acrylamide-2-methylpropanesulfonic acid-itaconic acid) drag reducer has not been reported

Method used

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  • A kind of modified brine drag reducer and preparation method thereof
  • A kind of modified brine drag reducer and preparation method thereof
  • A kind of modified brine drag reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of poly(acrylamide-2-acrylamide-2-methylpropanesulfonic acid-itaconic acid) brine drag reducer, the steps are as follows:

[0029] (1) Weigh propylene according to the mass ratio of itaconic acid, 2-acrylamido-2-methylpropanesulfonic acid, and acrylamide (0.15:1:5), and the mass ratio of total monomer to solvent (1:3). Add amide, 2-acrylamido-2-methylpropanesulfonic acid and itaconic acid to 75 ml of water, then pass through nitrogen to drive oxygen for 30 minutes, add 0.02% redox initiator accounting for the total mass of the monomer, condense and reflux , reacted at a temperature of 40° C. for 6 hours.

[0030] (2) The obtained reaction solution was sealed with cellophane and allowed to stand at room temperature for 24 hours to obtain a gel-like brine drag reducer.

[0031] The synthesized poly(acrylamide-2-acrylamide-2-methylpropanesulfonic acid-itaconic acid) molecular weight is 3×10 6 above.

[0032] It has been determined that in 150g / L s...

Embodiment 2

[0042] Example 2: The preparation method of poly(acrylamide-2-acrylamide-2-methylpropanesulfonic acid-itaconic acid) brine drag reducer, the steps are the same as Example 1, the difference is that the amount of initiator is 0.03% Instead of 0.02%. It has been determined that in 150g / L simulated brine, the flow rate is 950L / h, and the temperature is 25°C, the drag reduction rate can reach 30.5%.

Embodiment 3

[0043] Example 3: The preparation method of poly(acrylamide-2-acrylamide-2-methylpropanesulfonic acid-itaconic acid) brine drag reducer, the steps are the same as Example 1, the difference is that the reaction time is 4h instead of 6h . It has been determined that in 150g / L simulated brine, the flow rate is 950L / h, and the temperature is 25°C, the drag reduction rate can reach 34.6%.

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Abstract

The invention discloses a modified brine drag reducer and a preparation method thereof, which is characterized in that non-ionic monomers, temperature-resistant and salt-resistant monomers, and anionic monomers are polymerized in an aqueous solution in a redox initiation system to obtain modified brine Drag reducer; the non-ionic monomer is acrylamide, the temperature-resistant and salt-resistant monomer is 2-acrylamido-2-methylpropanesulfonic acid, and the anionic monomer is itaconic acid. The drag reducing agent not only has good drag reducing performance and wide application range, but also has simple synthesis and low cost. Through experiments, the brine modified drag reducer involved in the present invention has good drag reduction performance and temperature and salt resistance performance for simulated brines of various salinities, wherein for 150g / L simulated brine, the flow rate is 950L / h, when the temperature is 25°C, the drag reduction rate can reach 36.8%.

Description

technical field [0001] The invention belongs to the field of polymer functional material preparation technology, and in particular relates to a modified brine drag reducer and a preparation method thereof. Background technique [0002] In recent years, my country's shallow underground brine resources are gradually being exhausted, and people are paying more and more attention to the exploitation of deep underground brine with a buried depth of several kilometers. However, the energy consumption of deep underground brine is high in the process of mining and transporting brine. How to reduce the flow resistance of the pipelines for mining and transporting brine and reduce the energy consumption of mining and transporting is a key technical problem for the economical exploitation of deep underground brine. [0003] At present, polyacrylamide is the most widely used water-soluble drag reducing agent, which has excellent drag reducing performance in clear water. The drag reducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F222/02F15D1/00
Inventor 魏云鹤韩祥生张开亮张长桥于萍
Owner SHANDONG UNIV