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Asphalt composition particles, and preparation method and application thereof

A technology of asphalt composition and granules, which is applied in the field of high softening point asphalt composition granules and its preparation, can solve the problems of not forming an organic whole, difficulty in dispersing water-based drilling fluid, coalescence, etc., to increase deformability, The effect of increasing the application range of viscoelasticity and reducing the filtration loss under high temperature and high pressure

Active Publication Date: 2016-06-01
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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  • Asphalt composition particles, and preparation method and application thereof

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 asphalt composition particles, and a preparation method and application thereof. The asphalt composition particles comprise the following components in parts by weight: 80 to 95 parts of modified asphalt particles with high softening points, and 5 to 20 parts of latex, wherein the modified asphalt particles with high softening points comprise the following components in parts by weight: 50 to 80 parts of asphalt with high softening points and 20 to 50 parts of rubber powder particles; and the modified asphalt particles with high softening points are a combination with different size distribution of two or more than two sizes selected from the group consisting of 60 to 80 meshes, 80 to 120 meshes, 120 to 140 meshes or more than 140 meshes. The preparation method comprises the following contents: uniformly spraying the latex onto the modified asphalt particles with high softening points, carrying out standing permeation for a period of time, and carrying out vacuum freeze drying so as to obtain the asphalt composition particles. The asphalt composition particles provided by the invention have high softening points and good high-temperature performance and deformability, has simple preparation method and convenient operation, and can exert good plugging and filtration-reducing effects during 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 Applications(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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