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A kind of high softening point asphalt granules and preparation method thereof

A technology of high softening point asphalt and asphalt particles, which is applied in the field of petroleum asphalt to achieve good plugging effect, improved quality and strong deformation ability

Active Publication Date: 2016-11-23
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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;

[0033] 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

[0035]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;

[0036] 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 particles, denoted as A2, with an average particle size of 100 μm.

Embodiment 3

[0038] 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 a mother liquor; mix 120g of high softening point asphalt I (softening point of 140 ℃, 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;

[0039] 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 high-softening-point asphalt granule and a preparation method thereof. The high-softening-point asphalt granule uses high-softening-point asphalt I as the core phase, and the outer layer wraps high-softening-point asphalt II. The mass percentage includes the following: Components: 20% to 70% of high softening point asphalt I, 30% to 80% of high softening point asphalt II; the softening point difference between high softening point asphalt I and high softening point asphalt II is 15 to 50°C. The preparation method is as follows: (1) Mix the high softening point bitumen II and the compatibilizer to obtain the mother liquor, then mix the high softening point pitch I and the mother liquor evenly in the reactor, and blow off the compressed gas from the bottom of the reactor, The compatibilizer is discharged through the outlet of the upper part of the reactor in the gas phase. After the blow-off is completed, the material is discharged and cooled to obtain a high softening point asphalt mixture; (2) Add the mixture, surfactant and inorganic powder obtained in step (1) to the crushing equipment Mixing and crushing in the middle, that is to prepare high softening point asphalt granules. The bitumen particles of the invention have a higher softening point and can continue to function under the conditions of drilling operations in a wider temperature range.

Description

technical field [0001] The invention belongs to the field of petroleum asphalt, and in particular relates to a high softening point asphalt particle used for drilling fluid 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 age...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K13/02C08K3/04C08K3/34C08L97/00C08K5/19C08L3/04B29B9/12C09K8/035C10C3/00
Inventor 李明林傅丽姚汉荣郭皎河张建峰刘树华
Owner CHINA PETROLEUM & CHEM CORP
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