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A kind of latex modified asphalt composition particle and preparation method thereof

A technology of modified asphalt and composition, which is applied in the field of petroleum asphalt, which can solve the problems of increasing the difficulty of asphalt dispersion, and achieve the effects of increasing the range of viscoelasticity, good affinity, and improving compactness

Active Publication Date: 2017-10-03
SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD +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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  • A kind of latex modified asphalt composition particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take 100g of high softening point asphalt II (softening point is 180°C) and 70g of kerosene in a container, stir at room temperature (25°C) for 30 minutes, and mix thoroughly to obtain a mother liquor; mix 60g of high softening point asphalt I (softening point 200℃, the average particle size is 60μm) and the mother liquor are mixed in the reactor, and the compressed air is introduced, the gas inlet pressure is 0.15 MPa, the reactor temperature is kept at 180~190℃, stirred for 100 minutes, discharged, and cooled to obtain High softening point asphalt mixture;

[0046] Add 100g low-temperature embrittlement-treated high-softening point asphalt mixture (low-temperature embrittlement conditions: temperature -25°C, time 8 hours), 4g hydrotalcite and 1.5g sodium lignosulfonate into a high-speed pulverizer, mix and pulverize for 25s , to obtain high softening point asphalt particles, denoted as A1, with an average particle size of 85 μm.

Embodiment 2

[0048] 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 at 50°C for 30 minutes, and mix thoroughly to obtain a mother liquor; put 100g of high softening point asphalt I (softening point of 250 ℃, the average particle size is 70μm) and the mother liquor are mixed in the reactor, and compressed air is introduced, the gas inlet pressure is 0.25 MPa, the reactor temperature is kept at 230~240℃, stirred for 70 minutes, discharged, and cooled to obtain a high softening point asphalt mixture;

[0049] Add 100g of low-temperature brittle high-softening point asphalt composition (the embrittlement treatment conditions are the same as in Example 1), 5g of graphite, 1g of cetyltrimethylammonium bromide and 3g of carboxymethyl starch into a high-speed pulverizer , mixed and crushed for 20s to obtain high softening point asphalt granules, denoted as A2, with an average particle size of 100 μm.

Embodiment 3

[0051] Take 100g of high softening point pitch 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 a mother liquor; put 120g of high softening point pitch I (softening point of 170 ℃, the average particle size is 70μm) and the mother liquor are mixed in the reactor, and compressed air is introduced, the gas inlet pressure is 0.3 MPa, the reactor temperature is kept at 150~160°C, stirred for 60 minutes, and then heated to 165°C, stirred 10 minutes, discharging, cooling to obtain high softening point asphalt mixture;

[0052] Add 100g of asphalt composition, 6g of montmorillonite and 0.5g of octadecyltrimethylammonium bromide into a high-speed pulverizer, mix and pulverize for 30s to obtain high softening point asphalt granules, denoted as A3, and its average particle size is 80 μm.

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Abstract

The invention discloses a latex modified asphalt composition granule and a preparation method thereof. The latex modified asphalt composition granule of the present invention comprises the following components: 80wt%-94wt% of high softening point asphalt granules; 5wt%-20wt% of latex %; wherein, the high softening point asphalt granules, with the high softening point asphalt I as the core phase, the outer layer wraps the high softening point asphalt II, and the softening point difference between the high softening point asphalt II and the high softening point asphalt I is 10-25 ℃. The preparation method is as follows: the latex is uniformly sprayed on the high softening point asphalt composition, allowed to permeate for a period of time, and vacuum freeze-dried to obtain the modified asphalt composition particles. The modified asphalt composition particles of the present invention have a relatively high softening point, excellent high-temperature performance, simple preparation method, and can continue to play a role in drilling operation conditions with a wide temperature range during deep drilling, and play a good role in plugging and reducing filter loss effect.

Description

technical field [0001] The invention belongs to the field of petroleum asphalt, and in particular relates to latex modified asphalt composition particles and a preparation method thereof. Background technique [0002] Asphalt products are one of the important drilling fluid treatment agents, which have good comprehensive performances 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 drillin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L7/02C08L11/02C08L9/04C08L9/08C08L25/06C08L9/10C08K3/26C08K3/04C08K3/34C09K8/035
Inventor 刘淑鹤李明林
Owner SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD
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