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Modified asphalt particles and preparation method thereof

A technology of modified asphalt and particles, which is applied in the field of petroleum asphalt, can solve the problems of increasing the difficulty of asphalt dispersion, achieve good plugging and stable well wall, increase the use range of viscoelasticity, and the effect of strong deformation ability

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 particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Mix high softening point asphalt I (softening point is 180°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.

[0047] (2) Take 100g of high softening point asphalt II (softening point is 200°C) and 70g of distillate with a distillation range of 150-170°C in a container, stir at room temperature (25°C) for 30 minutes, and prepare the mother liquor after fully mixing II; mix 60g of modified rubber powder particles and mother liquor II in the reactor, and feed compressed air, the gas inlet pressure is 0.15MPa, the reactor temperature is ...

Embodiment 2

[0050] (1) Mix high softening point asphalt I (softening point is 220°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 3 hours, and 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.

[0051] (2) Take 100g of high softening point asphalt II (softening point of 250°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 maintaine...

Embodiment 3

[0054] (1) Mix high softening point asphalt I (softening point is 170°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.

[0055] (2) Take 100g of high softening point asphalt II (softening point of 140°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...

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Abstract

The invention discloses modified asphalt particles and a preparation method thereof. The modified asphalt particles comprise the following components in parts 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 particles; the high softening point asphalt II covers the rubber powder particles, and the high softening point asphalt I covers the high softening point asphalt II; difference between the softening point of the high softening point asphalt II and the softening point of the high softening point asphalt I is 10-25 DEG C. The modified asphalt particles have the advantages of higher softening point, excellent high temperature performance, and simple preparation method; the modified asphalt particles are continuously effective in a drilling operation condition with a wider temperature range during deep well drilling, and have good plugging and leak-off reduction effects.

Description

technical field [0001] The invention belongs to the field of petroleum asphalt, and in particular relates to a modified asphalt 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 the developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08K3/04C08K3/34C08K3/26C09K8/035C09K8/42
Inventor 刘淑鹤李明林
Owner CHINA PETROLEUM & CHEM CORP
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