Low-fluorescence sulfonating asphalt for blocking agent for drilling liquid

A sulfonated asphalt, low-fluorescence technology, which is applied in chemical processing of tar pitch/petroleum pitch/natural pitch, tar pitch/petroleum pitch/natural asphalt processing, drilling composition, etc., can solve the problem of reducing high temperature and high pressure. Problems such as poor filtration effect, low water-soluble content of plugging agent, unsuitable control of reaction speed, etc., achieve the effect of good sulfonation effect, high sulfonation rate and low price

Inactive Publication Date: 2018-08-17
TIANJIN DAGANG BOZHONG OIL ADDITIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the disadvantages of sulfonation and hydrolysis positive and negative reactions interacting with each other, reaction speed is not suitable for control, low sulfonation rate, uneven sulfonation, etc.
The obtained plugging agent for drilling fluid has low fluorescence sulfonated bitumen sulfonate sodium base and low content of water-soluble matter, and the effect of reducing high-temperature and high-pressure filtration is poor when the dosage is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Disperse 50 parts by weight of silica gel powder in 80 parts by weight of petroleum ether, slowly add 80 parts by weight of chlorosulfonic acid, and stir and react for 2 hours to obtain a sulfonating agent;

[0031] Combine 100 parts by weight of low fluorescent pitch, 5 parts by weight of polyethylene glycol ether, and 30 parts by weight of C 6 -C 12 Sodium alkylbenzene sulfonate and 80 parts by weight of petroleum ether were mixed to obtain the reaction raw materials. The reaction raw materials and 150 parts by weight of sulfonating agent were subjected to sulfonation reaction for 5 hours. During the reaction process, the reaction temperature was controlled to 40-60°C and stirred The speed is 500rpm;

[0032] The product obtained by the sulfonation reaction is neutralized with an aqueous sodium hydroxide solution to a pH of 8-9, and then the product of the neutralization reaction is distilled and dried to obtain a plugging agent for drilling fluid with low fluorescence sulf...

Embodiment 2

[0035] Disperse 50 parts by weight of silica gel powder in 80 parts by weight of petroleum ether, slowly add 100 parts by weight of chlorosulfonic acid, stir and react for 3 hours to obtain a sulfonating agent;

[0036] Mix 100 parts by weight of low-fluorescence pitch with 2 parts by weight of polyethylene glycol ether, 50 parts by weight of sodium dodecylbenzene sulfonate and 50 parts by weight of petroleum ether to obtain the reaction raw material. Part of the sulfonating agent is subjected to the sulfonation reaction for 3 hours, the reaction temperature is controlled to be 40-60°C, and the stirring rate is 500 rpm during the reaction;

[0037] The product obtained from the sulfonation reaction is neutralized with an aqueous sodium hydroxide solution to a pH of 8-9, and then the product of the neutralization reaction is distilled and dried to obtain a plugging agent for drilling fluid with low fluorescence sulfonation asphalt.

[0038] After testing, the low-fluorescence sulfona...

Embodiment 3

[0040] Disperse 50 parts by weight of silica gel powder in 80 parts by weight of petroleum ether, slowly add 90 parts by weight of chlorosulfonic acid, and stir and react for 2.5 hours to obtain a sulfonating agent;

[0041] 100 parts by weight of low-fluorescence pitch, 12 parts by weight of polyethylene glycol ether, 40 parts by weight of sodium dodecylbenzene sulfonate and 60 parts by weight of petroleum ether were mixed to obtain the reaction raw material, and the reaction raw material was mixed with 180 Part by weight of the sulfonating agent is subjected to the sulfonation reaction for 4 hours, the reaction temperature is controlled to be 40-60°C, and the stirring rate is 500 rpm during the reaction;

[0042] The product obtained by the sulfonation reaction is neutralized with an aqueous sodium hydroxide solution to a pH of 8-9, and then the product of the neutralization reaction is distilled and dried to obtain a plugging agent for drilling fluid with low fluorescence sulfona...

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Abstract

The invention provides a low-fluorescence sulfonating asphalt for a blocking agent for a drilling liquid. The high-temperature and high-pressure filter loss is 3.8 to 5.6ml/30min, the content of water-soluble matter is 79.4 to 87.6%, and the content of sodium sulfonate is 15.6 to 18.8%. The low-fluorescence sulfonating asphalt for the blocking agent for the drilling liquid is prepared by a methodwith the following steps of dispersing silica gel powder into petroleum ether, slowly adding chlorosulfonic acid, and stirring, so as to obtain a sulfonating agent; mixing the low-fluorescence asphaltand a solvent to obtain a reaction raw material, and sulfonating the reaction raw material by a sulfonating agent for 3 to 5h; neutralizing a product after sulfonating reaction and a sodium hydroxidewater solution to react until the pH (potential of hydrogen) value is 8 to 9; distilling and drying the product after neutralizing reaction, so as to obtain the low-fluorescence sulfonating asphalt for the blocking agent for the drilling liquid, wherein the solvent contains C6-C12 sodium alkyl benzene sulfonate and petroleum ether. The low-fluorescence sulfonating asphalt for the blocking agent for the drilling liquid has the advantages that the content of water-soluble matter is high, the sulfonating rate is high, and the high-temperature and high-pressure filter effect is good; the preparation method adopts mild reaction conditions, and is suitable for large-scale industrialized production.

Description

Technical field [0001] The invention belongs to the field of oil drilling fluid additives, and particularly relates to a plugging agent low-fluorescence sulfonated asphalt for drilling fluids. Background technique [0002] The plugging agent for drilling fluid low-fluorescence sulfonated asphalt is a kind of emulsified viscosity reducer and drilling fluid additive with good performance, which has the functions of anti-collapse, lubrication and reducing fluid loss at high temperature and high pressure. The plugging agent for drilling fluid low-fluorescence sulfonated asphalt contains sulfonic acid groups and has a strong hydration effect. When adsorbed on the shale interface, it can prevent the hydration and dispersion of shale particles and play an anti-collapse effect. At the same time, the water-insoluble part can fill pore throats and cracks to seal off, and can cover the shale interface to improve the quality of mud cake. The plugging agent for drilling fluids, low-fluoresce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C10C3/02
CPCC09K8/035C10C3/026
Inventor 许建忠
Owner TIANJIN DAGANG BOZHONG OIL ADDITIVES
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