Preparation method of base oil of drilling fluid

A drilling fluid and liquid-based technology, used in the petroleum industry, can solve the problems of non-reusable enzymes, easy inactivation and poisoning of enzymes, and high production costs, to maintain food safety and residents' health, reduce alcohol consumption, and reduce corrosion. effect of action

Inactive Publication Date: 2014-06-18
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to reduce pollution, there are also research reports that biological enzymes are used as catalysts to catalyze waste oil to prepare biodiesel, but the problem with this method is that when the alcohol in the reaction system reaches a certain amount, the enzymes are prone to inactivation, poisoning, and short life, and the enzymes cannot be reused, making the production High cost, not suitable for promotion
There are also people who use coated enzymes to catalyze waste oil to prepare biodiesel, but the reaction time is too long, the yield is low, and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of drilling fluid base oil, the steps are as follows:

[0044](1) Heat 100 parts by weight of waste oil to 60°C, stir for 30 minutes, add 100 parts by weight of tap water, continue stirring for 2 hours, and filter after cooling; remove water-soluble impurities and sediments in the waste oil;

[0045] (2) Separating the waste oil treated in step (1) from water to oil to remove moisture in the waste oil and increase the oil content;

[0046] (3) Heat the waste oil treated in step (2) to 38°C, add 1.8 parts by weight of lipase while stirring, and continue stirring for 25 minutes after adding the enzyme;

[0047] (4) To the waste oil treated in step (3), add alcohol while stirring, the molar ratio of alcohol to oil is 6.45:1, continue stirring for 3.5 hours, and control the temperature at 38°C; after the reaction, recover lipase;

[0048] (5) After cooling the waste oil treated in step (4), carry out oil-water separation; to remove the water in the was...

Embodiment 2

[0058] A preparation method of drilling fluid base oil, the steps are as follows:

[0059] (1) Heat 100 parts by weight of waste oil to 70°C, stir for 35 minutes, add 300 parts by weight of tap water, continue stirring for 4 hours, and filter after cooling; remove water-soluble impurities and sediments in the waste oil;

[0060] (2) Separating the waste oil treated in step (1) from water to oil to remove moisture in the waste oil and increase the oil content;

[0061] (3) Heat the waste oil treated in step (2) to 35°C, add 1 part by weight of lipase while stirring, and continue stirring for 20 minutes after adding the enzyme;

[0062] (4) To the waste oil treated in step (3), add alcohol while stirring, the molar ratio of alcohol to oil is 6:1, continue stirring for 2.5 hours, and control the temperature at 35°C; after the reaction, recover lipase;

[0063] (5) After cooling the waste oil treated in step (4), carry out oil-water separation; to remove the water in the waste oi...

Embodiment 3

[0073] A preparation method of drilling fluid base oil, the steps are as follows:

[0074] (1) Heat 100 parts by weight of waste oil to 65°C, stir for 32 minutes, add 200 parts by weight of tap water, continue stirring for 3 hours, and filter after cooling; remove water-soluble impurities and sediments in the waste oil;

[0075] (2) Separating the waste oil treated in step (1) from water to oil to remove moisture in the waste oil and increase the oil content;

[0076] (3) Heat the waste oil treated in step (2) to 44°C, add 2.5 parts by weight of lipase while stirring, and continue stirring for 30 minutes after adding the enzyme;

[0077] (4) To the waste oil treated in step (3), add alcohol while stirring, the molar ratio of alcohol to oil is 7:1, continue stirring for 4 hours, and control the temperature at 44°C; after the reaction, recover lipase;

[0078] (5) After cooling the waste oil treated in step (4), carry out oil-water separation; to remove the water in the waste o...

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Abstract

The invention belongs to the technical field of petroleum industry, and particularly relates to a preparation method of base oil of a drilling fluid. The method prepares the base oil of the drilling fluid through the steps: impurity removal; water removal; enzymatic pre-esterification; alkali catalytic esterification; distillation and the like. The method is environment-friendly and pollution-free in reaction and mild in reaction condition. As the pre-esterification time is shorter, the use level of alcohol is less, so that the alcohol has less influence on the activity of enzymes. The enzymatic catalyst can be repeatedly used, so that the cost is lowered, the reaction time is saved, and the production efficiency and the ester conversion ratio are improved. The base oil of the drilling fluid prepared by the invention is safe and energy-saving biological oil which is high in flash point and ignition point. The ignition point is higher than 93 DEG C, and the flash point is not lower than 130 DEG C. The base oil of the drilling fluid is safe to transport and use.

Description

technical field [0001] The invention belongs to the technical field of petroleum industry, and in particular relates to a preparation method of drilling fluid base oil. Background technique [0002] The drilling fluid with oil as the continuous phase is called oil-based drilling fluid, which is divided into two types: water-in-oil drilling fluid and full oil-based drilling fluid. Composition of water agent, wetting agent, thickener, inorganic salt and water. In full oil-based drilling fluid, water is a useless component, and its water content should not exceed 10%; while in water-in-oil drilling fluid, water is uniformly dispersed in diesel oil (or other continuous phase) as an essential component Oil), its water content is generally 10 to 60%. At present, oil-based mud has become an important means of drilling difficult high-temperature deep wells, highly deviated directional wells, horizontal wells and various complex formations, and can also be widely used as unblocki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/02C11C3/04C12P7/64
CPCY02P20/584
Inventor 侯冰陈勉金衍卢运虎
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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