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Hydrophobic monomer, high molecular polymer, and preparation methods and application thereof

A high-molecular polymer, hydrophobic monomer technology, applied in the preparation of organic compounds, the preparation of carbamate derivatives, the composition of drilling holes, etc. Problems such as flushing

Active Publication Date: 2017-10-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For vicious leakage, the traditional plugging materials and methods (mainly refer to bridge plugging method and cement slurry plugging method) have certain limitations, mainly manifested in: the bridge plugging is more difficult when encountering cracks in the leakage layer. When the fracture is large and there are many fractures, it is difficult to form a good plugging layer around the wellbore, and false plugging is easy to occur. After recovery drilling, the false plugging layer is destroyed by the agitation of the drilling tool and the washing of the drilling fluid, and the leakage occurs again.
Although cement slurry plugging has fewer false plugging phenomena, in the high-pressure leakage layer with more water content, the cement slurry is easily diluted by the fluid and cannot be solidified in time, resulting in plugging failure

Method used

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  • Hydrophobic monomer, high molecular polymer, and preparation methods and application thereof
  • Hydrophobic monomer, high molecular polymer, and preparation methods and application thereof
  • Hydrophobic monomer, high molecular polymer, and preparation methods and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The synthesis of embodiment 1 hydrophobic monomer:

[0041] Add 500 mL of acetone and 22.23 g of 1-(9-anthracenyl)ethanol into a dry three-neck flask equipped with a stirrer, condenser and dropping funnel, and stir until the 1-(9-anthracenyl)ethanol is fully dissolved. The water bath was heated to a temperature of 50°C, and vacuum was applied for 2 hours to remove moisture. Under nitrogen protection, 0.0124 g of dibutyltin dilaurate was added. 20.73 g of 3-isopropyl-dimethylbenzyl isocyanate in the dropping funnel was dropped into a three-necked flask, reacted for 6 hours, and distilled under reduced pressure to remove acetone, and the crude product of the target molecule was obtained. The crude product was rinsed with methanol three times, placed in an oven at 65°C until constant weight, and the target product was obtained.

Embodiment 2

[0043] Add 35.54 g of acrylamide, 28.82 g of acrylic acid and 720 mL of water into the reactor in sequence, stir until completely dissolved, and adjust the pH of the solution to 8.0 with a 50.0% NaOH solution by mass percent. Add 9.44g of the anthracenyl-containing hydrophobic monomer and 41.77g of sodium dodecylbenzenesulfonate prepared in Example 1 under stirring, and continue stirring to solubilize the hydrophobic monomer in the sodium dodecylbenzenesulfonate micelle In the solution, nitrogen was blown for 1 hour to remove dissolved oxygen in the solution. Add 0.7380g K 2 S 2 o 8 , continue to blow nitrogen and raise the temperature to 50° C., and react for 10.5 hours to obtain a gel-like product. Wash with absolute ethanol, pulverize and dry to obtain the target product.

Embodiment 3

[0045] Add 21.32g of acrylamide, 9.91g of N-methyl-N-vinylacetamide, 36.03g of acrylic acid and 1277.94mL of water in sequence in the reactor, stir until completely dissolved, and adjust with a NaOH solution with a mass percent concentration of 50.0%. The pH of the solution was brought to 8.5. Add 5.66g of anthracenyl-containing hydrophobic monomers prepared in Example 1 and 26.2g of sodium octadecylsulfonate under stirring conditions, and continue stirring to solubilize the hydrophobic monomers in the sodium octadecylsulfonate micelles. Nitrogen was sparged for 45 minutes to remove dissolved oxygen in the solution. Add 0.5g (NH 4 ) 2 S 2 o 8 , continue to pass nitrogen and heat up to the predetermined reaction temperature of 55° C., and react for 8 hours to obtain a gelatinous product. Wash with absolute ethanol, pulverize and dry to obtain the target product.

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Abstract

The invention provides a hydrophobic monomer shown in a formula 1 and a preparation method thereof. The invention further provides a high molecular polymer and a preparation method thereof. Besides, the invention also provides leaking stopping gel containing the high molecular polymer. The leaking stopping gel provided by the invention has the advantages of appropriate gelation time, good shear dilutability, high water dilutability resistance, and capability of meeting the demand of leaking stoppage on-site construction.

Description

technical field [0001] The invention belongs to the field of oilfield additives, and in particular relates to a hydrophobic monomer, a high molecular polymer and a preparation method and application thereof. Background technique [0002] Lost circulation refers to a kind of downhole fluid (including drilling fluid, cement slurry, completion fluid, etc.) that enters the formation under the action of pressure difference during various operations of drilling, cementing, logging or workover. Complications. Lost circulation is a common problem in the drilling process, which not only affects the drilling speed, increases the drilling risk, but also causes direct economic losses. In particular, malignant leakage such as lost fracture leakage and karst cave leakage is the most difficult to deal with. [0003] For vicious leakage, the traditional plugging materials and methods (mainly refer to bridge plugging method and cement slurry plugging method) have certain limitations, mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C271/18C07C269/02C09K8/44C08F220/56C08F220/06C08F220/54C08F20/58C08F216/36
CPCC07C269/02C07C271/18C08F220/06C08F220/56C08F220/58C09K8/426C09K8/44C08F216/36C08F220/54
Inventor 褚奇刘四海张凤英李大奇陈曾伟刘金华
Owner CHINA PETROLEUM & CHEM CORP
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