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Asphalt particles with high softening point and preparation method for asphalt particles

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

Active Publication Date: 2015-04-29
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℃) and 70g of kerosene in a container, stir at room temperature (25℃) for 30 minutes, and prepare mother liquor after fully mixing; 60g high softening point asphalt I (softening point The temperature is 200℃, the average particle size is 60μm) and the mother liquor are mixed in the reactor, and 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. High softening point asphalt mixture;

[0033] Add 100g low-temperature embrittlement high softening point asphalt mixture (low-temperature embrittlement conditions: temperature -25°C, time 8 hours), 4g hydrotalcite and 1.5g sodium lignosulfonate, add them to a high-speed crusher, mix and crush for 25s , Obtain high softening point asphalt particles, denoted as A1, with an average particle size of 85μm.

Embodiment 2

[0035] Take 100g high softening point asphalt II (softening point 220℃) and 50g diesel oil and put them in a container, stir at 50℃ for 30 minutes at room temperature, and prepare mother liquor after fully mixing; 100g high softening point asphalt I (softening point 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 maintained at 230~240℃, stirred for 70 minutes, discharged, and cooled to obtain a high softening point Asphalt mixture

[0036] Add 100g of the low-temperature embrittlement high softening point asphalt composition (the embrittlement treatment conditions are the same as in Example 1), 5g graphite, 1g cetyltrimethylammonium bromide and 3g carboxymethyl starch are added to the high-speed pulverizer , Mix and pulverize for 20s to obtain high softening point asphalt particles, denoted as A2, with an average particle size of 100μm.

Embodiment 3

[0038] Take 100g of high softening point asphalt II (with a softening point of 170℃) and 100g of gasoline in a container, stir at 80℃ for 35 minutes at room temperature, and prepare mother liquor after fully mixing; 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, and the reactor temperature is maintained at 150~160℃. Stir for 60 minutes, then heat to 165℃ and stir. 10 minutes, discharging and cooling to obtain high softening point asphalt mixture;

[0039] Add 100g of asphalt composition, 6g of montmorillonite and 0.5g of octadecyltrimethylammonium bromide to a high-speed pulverizer, mix and pulverize for 30s to obtain high softening point asphalt particles, denoted as A3, the average particle size It is 80μm.

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Abstract

The invention discloses asphalt particles with a high softening point and a preparation method for the asphalt particles. According to the asphalt particles with the high softening point, asphalt I with the high softening point is a nuclear phase, and asphalt II with the high softening point wraps the outer layer of the asphalt I; the asphalt particles comprise the following components in percentage by mass: 20-70 percent of the asphalt I with the high softening point and 30-80 percent of the asphalt II with the high softening point, wherein the softening point difference between the asphalt I with the high softening point and the asphalt II with the high softening point is 15-50 DEG C. The preparation method comprises the following steps: (1) mixing the asphalt II with the high softening point with a compatilizer to obtain mother liquor, uniformly mixing the asphalt I with the high softening point with the mother liquor in a reactor, feeding compressed gas from the bottom of the reactor for blowoff treatment to discharge the compatilizer through an outlet in the upper part of the reactor in the form of a gas phase, and discharging and cooling at the end of blowoff treatment to obtain an asphalt mixture with the high softening point; (2) adding the mixture obtained in the step (1), a surfactant and inorganic micro powder into crushing equipment to be mixed and crushed to prepare the asphalt particles with the high softening point. The asphalt particles are higher in softening point and can continuously play a role under the drilling operation condition within 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 Applications(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