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Modified asphalt particles as well as preparation method and application thereof

A technology for modifying asphalt and granules, which is applied in chemical instruments and methods, drilling compositions, building components, etc., and can solve the problems that cannot meet the requirements of drilling fluid plugging, anti-slumping, and fluid loss reduction. Complex asphalt process and other issues, to achieve the effect of improving high temperature stability and high temperature elasticity, improving strength and improving dispersibility

Active Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the existing technology, the process of preparing high softening point bitumen is complicated, and the bitumen products used in water-based drilling fluid have a low softening point and large particles, and their dispersion performance in drilling fluid is not good, so they cannot meet the requirements of drilling fluid plugging, To solve problems such as anti-collapse, stable well wall, and reduced fluid loss, the invention provides a modified asphalt particle and its preparation and application. The modified asphalt particle has a small particle size, good high temperature resistance and deformation ability, and can Sustained performance in high temperature water-based drilling fluids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Take 20g of dissolved and deasphalted powder with a softening point of 145.2°C into the flask, slowly add 300mL of concentrated nitric acid (65%), keep stirring and gradually increase the temperature, and react under the condition of heating and reflux, the reaction temperature is 85°C, and the reaction time is 5h. After the reaction, cool down to room temperature, dilute with a small amount of distilled water, and suction filter with a microporous membrane. The obtained filtrate is evaporated to dryness by vacuum distillation, and dried to obtain pitch-based graphene oxide microchips.

[0044] Add 10 g of the above-prepared pitch-based graphene oxide microchips into an appropriate amount of xylene, stir and mix evenly, add 12.5 g of dimethylethylenediamine while stirring, and then add 1.0 g of titanate coupling agent. React for 3 hours. After the reaction, cool to room temperature, filter the filtrate, and fully dry the filter cake to obtain the aminated graphene micros...

Embodiment 2

[0048] Take 28g of dissolved and deasphalted powder with a softening point of 154.6°C into the flask, slowly add 350mL of concentrated nitric acid (65%), keep stirring and gradually increase the temperature, and react under the condition of heating and reflux, the reaction temperature is 80°C, and the reaction time is 6h. After the reaction, cool down to room temperature, dilute with a small amount of distilled water, and suction filter with a microporous membrane. The obtained filtrate is evaporated to dryness by vacuum distillation, and dried to obtain pitch-based graphene oxide microchips.

[0049] Add 12 g of the above-prepared pitch-based graphene oxide microflakes to an appropriate amount of xylene, stir and mix evenly, add 14.8 g of diethylethylenediamine while stirring, and then add 1.36 g of titanate coupling agent. React for 4 hours. After the reaction, cool to room temperature, filter the filtrate, and fully dry the filter cake to obtain the aminated graphene microsh...

Embodiment 3

[0053] Take 35g of dissolved and deasphalted powder with a softening point of 162.4°C into the flask, slowly add 650mL of concentrated nitric acid (65%), keep stirring and gradually raise the temperature, and react under the condition of heating and reflux, the reaction temperature is 90°C, and the reaction time is 5.5h . After the reaction, cool down to room temperature, dilute with a small amount of distilled water, and suction filter with a microporous membrane. The obtained filtrate is evaporated to dryness by vacuum distillation, and dried to obtain pitch-based graphene oxide microchips.

[0054] Add 15 g of the above-prepared pitch-based graphene oxide microchips into an appropriate amount of xylene, stir and mix evenly, add 26.5 g of dibutylethylenediamine while stirring, and then add 2.0 g of titanate coupling agent. React for 5 hours. After the reaction, cool to room temperature, filter the filtrate, and fully dry the filter cake to obtain the aminated graphene micros...

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Abstract

The invention discloses modified asphalt particles as well as preparation and application thereof. The modified asphalt particles are prepared from the following components in parts by weight: 100 parts of matrix asphalt, 0.5 to 1 part of aminated graphene nanoplatelets, 5 to 20 parts of rubber powder, 1 to 5 parts of a reaction accelerant and 0.5 to 2 parts of an auxiliary agent. The modified asphalt particles are small in particle size and good in high-temperature resistance and deformability, and can continuously play a role in the high-temperature water-based drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling and production, and in particular relates to a modified asphalt particle and a preparation method and application thereof. Background technique [0002] Asphalt products are widely used in the process of oil and gas drilling. They can be used as an important part of drilling fluid (commonly known as mud). and high temperature stability. With the development of petroleum exploration and development, the drilling depth continues to deepen, the formations encountered become more and more complex, and the number of special craft wells such as directional wells and horizontal wells is gradually increasing. This makes drilling engineering put forward higher requirements for bituminous products and systems for drilling fluids. Ordinary softening point bitumen cannot meet the high-temperature operation requirements in deep wells due to excessive softening or even flow. It is of great signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L9/02C08L11/00C08L9/06C08L45/00C08K9/04C08K3/04C08K7/00C08K3/26C09K8/03C09K8/035C09K8/24
CPCC08L95/00C09K8/03C09K8/035C09K8/24C08K2201/011C08K2003/265C08L2201/08C08L2205/03C08L9/02C08L11/00C08L9/06C08L45/00C08K9/04C08K3/042C08K7/00C08K3/26
Inventor 傅丽郭皎河郭小圣吴晓颖
Owner CHINA PETROLEUM & CHEM CORP
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