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Asphalt composition particle and preparation method thereof

A technology of asphalt composition and granules, applied in the field of high softening point asphalt composition granules for oilfield drilling and its preparation, can solve the problems of reducing the effective components of asphalt powder, damage to the mud system, etc., so as to reduce production costs and improve the softening point of products. , the effect of high oxidation reactivity and self-exothermic ability of the reaction

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will reduce the effective components in the asphalt powder, and due to the introduction of other components, it may cause damage to the mud system during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The vacuum residue with a penetration of 61 1 / 10mm at 25°C and a softening point of 46.3°C, accounting for 80.0% of the total (total mass of vacuum residue and coal tar pitch, the same below), is heated in an oxidation kettle To 140 ℃ molten state. Add coal tar pitch with a softening point of 65.4°C, accounting for 20.0% of the total amount, and heat it to 160°C in the premixing tank, then feed air and keep the pressure inside the tank at 0.12MPa for 20 minutes. Open the throttle valve, spray the coal tar pitch liquid into the oxidation kettle gradually, and adjust the air flow rate to 0.2 m after spraying completely. 3 × kg -1 × h -1 , carry out blowing oxidation, oxidation conditions and product properties are shown in Table 1.

[0032]Put 100g of high softening point asphalt in a small pulverizer, and add 5% carboxymethyl starch, 4.5% cationic starch and 0.5% cetyltrimethylammonium chloride based on the mass of the high softening point asphalt composition particle...

Embodiment 2

[0034] Vacuum residue oil with a penetration of 82 1 / 10mm at 25°C and a softening point of 45.7°C, accounting for 75.0% of the total, was placed in an oxidation kettle and heated to a molten state of 130°C. Add coal tar pitch with a softening point of 49.3°C, accounting for 25.0% of the total amount, into the premix tank and heat it to 150°C, blow in air and keep the pressure inside the tank at 0.18MPa for 35 minutes. Open the throttle valve, gradually spray the coal tar pitch liquid into the oxidation kettle, and adjust the air flow to 0.20 m after spraying completely. 3 × kg -1 × h -1 , carry out blowing oxidation, oxidation conditions and product properties are shown in Table 1.

[0035] Put 100g of high softening point asphalt in a small pulverizer, and add 7% carboxymethyl starch, 2.6% phosphate starch and 0.4% mixed fatty alcohol sodium sulfate based on the mass of the high softening point asphalt composition particles. Stir at room temperature for 20 seconds to obtai...

Embodiment 3

[0037] Vacuum residue oil with a penetration of 43 1 / 10mm at 25°C and a softening point of 48.5°C, accounting for 65.0% of the total, was placed in an oxidation kettle and heated to a molten state at 150°C. Add coal tar pitch with a softening point of 56.2°C, accounting for 35.0% of the total amount, into the premix tank and heat it up to 160°C, blow in air and keep the pressure inside the tank at 0.25MPa for 50 minutes. Open the throttle valve and gradually spray the coal tar pitch liquid into the oxidation kettle. After spraying completely, adjust the air flow rate to 0.22 m 3 × kg -1 × h -1 , carry out blowing oxidation, oxidation conditions and product properties are shown in Table 1.

[0038] Put 100g of high softening point asphalt in a small pulverizer, and add 4.5% cationic starch, 4.5% water-soluble PVA fiber and 0.1% sodium lignosulfonate based on the mass of the high softening point asphalt composition particles. Stir at room temperature for 30 seconds to obtain ...

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Abstract

The invention discloses an asphalt composition particle and a preparation method thereof. The asphalt composition particle comprises the following components by weight percentage: 80wt%-95wt% of high-softening point asphalt, 4.9wt%-15wt% of modified starch and / or water soluble fiber, and 0.1wt%-5wt% of a promoter. Specifically, the high-softening point asphalt is the asphalt with a softening point at 120-220DEG C, the promoter is one or more of sulfate, quaternary ammonium salt or lignosulfonate. The preparation method includes: mixing and crushing the high-softening point asphalt, the modified starch and / or water soluble fiber and the promoter to obtain the asphalt composition particle. With high softening point and excellent high temperature performance, the asphalt composition particle provided by the invention can be used under high temperature drilling operation conditions. The preparation method is simple and is convenient to operate.

Description

technical field [0001] The invention relates to an asphalt composition granule, in particular to a high softening point asphalt composition granule for oil field drilling and a preparation method thereof. Background technique [0002] With the development of the petroleum industry and the continuous expansion of the drilling field, the application of bitumen-based plugging agents in oilfield drilling has attracted more and more attention. Bituminous plugging agents generally contain water-insoluble bitumen particles 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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IPC IPC(8): C08L95/00C08L3/06C08L3/08C08L3/04C08L1/26C08L29/04C08K5/41C08K5/19C08L97/00C09K8/035
Inventor 傅丽姚汉荣郭皎河刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP
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