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Modified asphalt composition particle and preparation method thereof

A technology of modified asphalt and composition, applied in the field of petroleum asphalt, can solve problems such as increasing the difficulty of asphalt dispersion, and achieve the effect of improving quality

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This additive composition can be effective in a wide range of temperature and pressure, but simple mechanical mixing is difficult to effectively play the role of asphalt with different softening points
Using several kinds of asphalt with different softening points to mechanically mix, simple combination, each will play its own role. After the softening point is exceeded, it will lose its effect. If you want to achieve a good plugging effect in different temperature ranges, you must ensure each softening point. The amount of bitumen added further increases the difficulty of dispersing bitumen in the drilling fluid

Method used

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  • Modified asphalt composition particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Mix high softening point asphalt I (softening point is 200°C) with kerosene to obtain mother liquor I (mixing mass ratio is 2:1), and then spray mother liquor I evenly on rubber powder particles (mass ratio of mother liquor to rubber powder particles 1:1), after static permeation for 2 hours, then remove the compatibilizer under vacuum conditions (temperature 80°C, pressure ≤ 8kPa, time 2 hours), and the remaining materials are frozen (freezing temperature -35°C, frozen time is 12 hours), pulverized to obtain modified rubber powder particles.

[0046] (2) Take 100g of high softening point asphalt II (softening point of 180°C) and 70g of kerosene in a container, stir at room temperature (25°C) for 30 minutes, and mix thoroughly to obtain mother liquor II; mix 60g of modified rubber powder The granules are mixed with the mother liquor II in the reactor, and compressed air is introduced into it, the gas inlet pressure is 0.15MPa, the reactor temperature is kept at 180~...

Embodiment 2

[0049] (1) Mix high softening point asphalt I (softening point is 250°C) with diesel oil to obtain mother liquor I (mixing mass ratio is 1:1), and then spray mother liquor I evenly on rubber powder particles (mass of mother liquor and rubber powder particles The ratio is 2:1), after static infiltration for 4 hours, then remove the compatibilizer under vacuum conditions (temperature 100°C, pressure ≤ 8kPa, time 1 hour), and the remaining materials are frozen (freezing temperature -25°C, frozen time is 10 hours), pulverized to obtain modified rubber powder particles.

[0050] (2) Take 100g of high softening point asphalt II (softening point of 220°C) and 50g of diesel oil in a container, stir at room temperature 50°C for 30 minutes, and mix thoroughly to obtain mother liquor II; mix 100g of modified rubber powder particles with The mother liquor II is mixed in the reactor and fed with compressed air, the gas inlet pressure is 0.25MPa, the reactor temperature is maintained at 230...

Embodiment 3

[0053] (1) Mix high softening point asphalt I (softening point: 140°C) with gasoline to obtain mother liquor I (mixing mass ratio is 3:1), and then spray mother liquor I evenly on rubber powder particles (mass of mother liquor and rubber powder particles The ratio is 3:1), after standing for infiltration for 1 hour, then remove the compatibilizer under vacuum conditions (temperature 50°C, pressure ≤ 8kPa, time 1.5 hours), and the remaining materials are frozen (freezing temperature -30°C, frozen time is 8 hours), crushed to obtain modified rubber powder particles.

[0054] (2) Take 100g of high softening point asphalt II (softening point of 170°C) and 100g of gasoline in a container, stir at room temperature at 80°C for 35 minutes, and mix thoroughly to obtain mother liquor II; mix 120g of modified rubber powder particles with The mother liquor II is mixed in the reactor and fed with compressed air, the gas inlet pressure is 0.3MPa, the reactor temperature is kept at 150~160°C...

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Abstract

The invention discloses modified asphalt composition particle and its preparation method. The modified asphalt composition particle comprises the following ingredients (by weight): 15-60 parts of high softening point asphalt I, 10-50 parts of high softening point asphalt II and 20-50 parts of rubber powder granule. The high softening point asphalt II coats the rubber powder granule. The high softening point asphalt I coats the high softening point asphalt II. Softening point difference of the high softening point asphalt I and the high softening point asphalt II is 15-50 DEG C. The modified asphalt composition particle of the invention has high softening point and excellent high temperature performance. The preparation method is simple. The product can continuously play a role in deep well drilling under the drilling operation condition of wide temperature range, and has good plugging and filtration-reducing effects.

Description

technical field [0001] The invention belongs to the field of petroleum asphalt, and in particular relates to a modified asphalt composition particle and a preparation method thereof. Background technique [0002] Asphalt products are one of the important drilling fluid treatment agents, which have good comprehensive effects such as anti-slump, lubrication, emulsification, fluid loss reduction and high temperature stability. Bituminous products generally contain bitumen particles that are insoluble in water 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 for oil drilling. With t...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08K3/26C08K3/04C08K3/34C09K8/035
Inventor 高鲜会李明林郭皎河宁爱民李志军
Owner CHINA PETROLEUM & CHEM CORP
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