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Phenyl-containing hydrophobic cross-linking monomer and hydrogel based on phenyl-containing hydrophobic cross-linking monomer

A technology of cross-linking monomers and hydrogels, applied in the field of functional polymers, which can solve the problems of inability to solidify, failure of plugging, etc.

Active Publication Date: 2017-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the cement slurry encounters a lot of formation fluid, it will be diluted by the formation fluid and cannot be solidified, resulting in plugging failure

Method used

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  • Phenyl-containing hydrophobic cross-linking monomer and hydrogel based on phenyl-containing hydrophobic cross-linking monomer
  • Phenyl-containing hydrophobic cross-linking monomer and hydrogel based on phenyl-containing hydrophobic cross-linking monomer
  • Phenyl-containing hydrophobic cross-linking monomer and hydrogel based on phenyl-containing hydrophobic cross-linking monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of Phenyl-Containing Hydrophobic Crosslinking Monomers

[0044]500 mL of acetone and 22.83 g of bisphenol A were added to a dry three-necked flask equipped with a stirrer, a condenser and a dropping funnel, and 42.26 g of 3-isopropenyl-dimethylbenzyl isocyanate was added to the dropping funnel. Stir until the bisphenol A in the flask is fully dissolved, then heat to 65° C. in a water bath, and apply vacuum for 2 hours while heating to remove moisture. Under nitrogen protection, 0.0338 g of dibutyltin dilaurate was added. The 3-isopropenyl-dimethylbenzyl isocyanate in the dropping funnel was dropped into the three-necked flask, the reaction was continued for 6 hours under stirring conditions, and the acetone was removed by distillation under reduced pressure to obtain the crude product of the target molecule. The crude product was rinsed three times with chloroform to remove unreacted monomers, and then placed in a 78° C. oven to constant weight to obtain th...

Embodiment 2

[0046] Preparation of hydrogels

[0047] 690g of 1,4-dioxane, 11.31g of N-isopropylacrylamide, 18.81g of sodium acrylate and 6.31g of the monomer prepared in Example 1 were sequentially added to the reactor, stirred until the monomer was completely dissolved, and the Nitrogen was introduced for 40 minutes to evacuate the air. 0.73 g of dibenzoyl peroxide was added, the temperature was raised to a predetermined reaction temperature of 86° C., and the reaction was stirred in a nitrogen atmosphere for 12 hours to obtain a pale yellow colloidal crude product.

[0048] The crude product was added to 1000 mL of ethanol for precipitation and then filtered to obtain a solid-phase product. Wash with acetone 3 times, and then use the glacial acetic acid-ethylene glycol mixed solvent with a volume ratio of 3:2 as the extraction agent to extract the product with a Soxhlet extractor for 24 hours, and vacuum dry at 25 ° C to constant weight, that is, obtain the target product.

Embodiment 3

[0050] Preparation of hydrogels

[0051] 812g of N,N-dimethylformamide, 12.72g of N,N-diethylacrylamide, 64.84g of sodium methacrylate and 12.61g of the monomer prepared in Example 1 were successively added to the reactor, and stirred until a single The body was completely dissolved and argon was bubbled for 60 minutes to evacuate the air. 3.60 g of dodecanoyl peroxide was added, the temperature was raised to a predetermined reaction temperature of 70° C., and the reaction was stirred in an argon atmosphere for 8 hours to obtain a pale yellow colloidal crude product.

[0052] The crude product was added to 1000 mL of ethanol for precipitation and then filtered to obtain a solid-phase product. Wash with acetone 3 times, and then use the glacial acetic acid-ethylene glycol mixed solvent with a volume ratio of 3:2 as the extraction agent to extract the product with a Soxhlet extractor for 24 hours, and vacuum dry at 25 ° C to constant weight, that is, obtain the target product....

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Abstract

The invention provides a phenyl-containing hydrophobic cross-linking monomer, and a preparation method for the monomer. The structural formula of the monomer is shown as the formula I. The invention also provides a hydrogel based on the phenyl-containing hydrophobic cross-linking monomer, and a preparation method for the hydrogel. The hydrogel is simple in preparation method, has high temperature resistance, and can solve the problem of severe loss of a high-temperature deep well stratum widely.

Description

technical field [0001] The invention belongs to the field of functional polymers, and relates to a phenyl-containing hydrophobic cross-linking monomer and a hydrogel based on the monomer. Background technique [0002] Loss of circulation refers to the leakage of various working fluids (including drilling fluid, cement slurry, completion fluid and other working fluids) between the formation and the wellbore during various downhole operations of drilling, cementing, logging or workover. Under the action of pressure difference, it is a kind of downhole complex condition that flows into the formation. The lost circulation occurred during the drilling process greatly affected the drilling speed and caused huge direct economic losses. Especially in naturally fractured formations and karst cave formations, malignant leakage is often induced in long open-hole sections of multi-pressure systems, causing the drilling fluid pumped into the well to enter or not exit. Repeated, difficu...

Claims

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Application Information

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IPC IPC(8): C07C269/02C07C271/44C08F220/54C08F220/06C08F212/14C09K8/42
Inventor 褚奇金军斌钱晓琳李雄李胜李涛宋兆辉
Owner CHINA PETROLEUM & CHEM CORP
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