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A kind of asphalt composition particle and its preparation method and application

A technology of asphalt composition and granules, which is applied in the field of high softening point asphalt composition granules and its preparation, which can solve problems such as coalescence, failure to form an organic whole, and difficulty in dispersing water-based drilling fluids, so as to reduce high-temperature and high-pressure filtration loss The effect of increasing the volume, increasing the deformability, and increasing the use range of viscoelasticity

Active Publication Date: 2017-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method simply mixes rubber powder and asphalt, and the two do not form an organic whole, so it is difficult to continue to play a role in a wide viscoelastic range
It can only be used in oil-based drilling fluids. In water-based drilling fluids, it will be difficult to disperse or even coalesce.

Method used

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  • A kind of asphalt composition particle and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 100 g of oxidized pitch whose softening point is 153° C., and heat it to a molten state. Take 60 g of waste tire rubber powder with a particle size of 80 mesh, and preheat it at 105° C. for 30 minutes. Put the melted high softening point asphalt in the watering can, evenly spray the high softening point asphalt on the preheated rubber powder particles, and stir while spraying. After spraying, it was left to stand at 145° C. for 30 minutes, and then cooled to room temperature. Then place it in a freezer to freeze (freezing temperature -30°C, freezing time: 13 hours). Take it out and put it into a vibrating sieve, use a 60-mesh or 80-mesh standard sieve as the bottom of the sieve, vibrate and pulverize it for 25 seconds, and get 60-80 mesh modified high softening point asphalt particles under the sieve. Another 70g of styrene-butadiene latex (40% solid content) was placed in a watering can, and the latex was evenly sprayed onto the asphalt particles obtained in the...

Embodiment 2

[0037] Take 100g of deasphalt with a softening point of 174.6°C and heat it to a molten state. Take 52 g of waste tire rubber powder with a particle size of 100 mesh, and preheat it at 95° C. for 30 minutes. Put the melted high softening point asphalt in the watering can, evenly spray the high softening point asphalt on the preheated rubber powder particles, and stir while spraying. After spraying, it was left to stand at 130° C. for 40 minutes, and cooled to room temperature. Then place it in a freezer to freeze (freezing temperature -25°C, freezing time: 12 hours). After taking it out, put it into a vibrating sieve, use 80-mesh and 100-mesh standard sieves as the bottom of the sieve, vibrate and pulverize for 30 seconds, and obtain 80-100 mesh modified high softening point asphalt particles. Another 65g of neoprene latex (solid content 30%) was placed in a watering can, and the latex was evenly sprayed onto the asphalt particles obtained in the above test, and stirred whil...

Embodiment 3

[0039] Take 100g of oxidized pitch with a softening point of 145.8°C and heat it to a molten state. Take 52g of waste tire rubber powder with a particle size of 120 mesh, preheat at 95°C for 45 minutes, and add 6.5g of silicon powder. Put the melted high softening point asphalt in the watering can, evenly spray the high softening point asphalt on the preheated rubber powder particles, and stir while spraying. After spraying, it was left to stand at 125° C. for 55 minutes, and cooled to room temperature. Then place it in a freezer to freeze (freezing temperature -40°C, and freezing time is 10 hours). Take it out and put it into a vibrating sieve, use a 100-mesh or 120-mesh standard sieve as the bottom of the sieve, and vibrate and pulverize for 35 seconds to obtain 100-120 mesh modified high softening point asphalt particles. Another 96g of nitrile latex (30% solid content) was placed in a watering can, and the latex was evenly sprayed onto the asphalt particles obtained in t...

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Abstract

The invention discloses an asphalt composition granule, a preparation method and application thereof, and comprises the following components in parts by weight of the asphalt composition granule: 80-95 parts of modified high-softening-point asphalt granules, and 5-20 parts of latex. The modified high softening point asphalt granule comprises the following components in parts by weight: 50-80 parts of high softening point asphalt, and 20-50 parts of rubber powder particles. The modified high softening point asphalt particles are 60-80 mesh, 80-120 mesh, 120-140 mesh or more than 140 mesh, and the combination of two or more different particle size distributions. The preparation method includes the following contents: evenly spray latex onto the modified high softening point asphalt particles, let it stand for a period of infiltration, and vacuum freeze-dry to obtain the asphalt composition particles. The asphalt composition particles of the invention have higher softening point, better high-temperature performance and deformation ability, simple preparation method and convenient operation, and can have good plugging and fluid loss reduction effects in deep drilling.

Description

technical field [0001] The invention relates to an asphalt composition granule, in particular to a high softening point asphalt composition granule used in oil field drilling and its preparation method and application. Background technique [0002] With the development of the petroleum industry and the continuous expansion of the drilling field, the application of bitumen-based plugging agents in oilfield drilling has attracted more and more attention. Bituminous plugging agents generally contain water-insoluble bitumen particles and have a certain softening point. When the temperature and pressure in the wellbore are high enough, the asphalt particles soften and deform, and are squeezed into the micro-fractures of the well wall, preventing drilling fluid and filtrate from penetrating through the micro-fractures, and effectively sealing the formation together with the mud cake. Bituminous substances are extremely effective anti-slump agents and oil layer protection agents f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L7/02C08L9/08C08L9/04C08L11/02C08L25/06C08L9/10C09K8/035
Inventor 傅丽姚汉荣郭皎河刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP
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