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High-temperature-resistant emulsifier for oil-based drilling fluid and preparation method thereof

An oil-based drilling fluid, high temperature resistance technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of heavy material settlement, high viscosity, stuck drill, etc., to reduce surface free energy and environment Pollution, the effect of improving the urban environment

Inactive Publication Date: 2020-07-07
天津市海罗兰科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are common problems in oil-based drilling fluids, such as poor wettability, poor rheology, settlement of heavy materials, and after-treatment of drilling fluids.
Poor rheological properties of drilling fluid (such as: high viscosity, high shear force, affecting pump efficiency and increasing pressure loss), poor sand-carrying ability, will affect drilling speed, and complex situations such as drill sticking will occur for a long time
The composition of oil-based drilling fluid is very complex, and most of them are some refractory organic pollutants. If leakage occurs, it will cause serious pollution to soil and groundwater, and it is difficult to repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of high temperature resistant emulsifier for oil base drilling fluid is as follows:

[0034] Step 1: Mix kitchen waste oil, dodecylbenzenesulfonic acid and water, add it to the reaction kettle, react and stir at 110°C for 2 hours, hydrolyze it into unsaturated fatty acids, continue to keep warm at 120°C and spray it with water Negative pressure dehydration by negative pressure machine for 1h;

[0035] Wherein the volume ratio of kitchen waste waste oil, dodecylbenzenesulfonic acid and water is 50:5:45, and the stirring speed is 80 rpm;

[0036] Step 2: add monoethanolamine and soda ash Na in the product that step 1 obtains 2 CO 3 , heat up to 150°C and keep warm for 1h, stop heating after reacting and stirring for 7h, and obtain fatty alcohol amides containing ethylenic bonds;

[0037] Wherein the volume ratio of hydroxyethylethylenediamine and potassium hydroxide is 5:0.2, and the stirring speed is 80 rpm;

[0038] Step 3: respectively ...

Embodiment 2

[0041] A kind of preparation method of high temperature resistant emulsifier for oil base drilling fluid is as follows:

[0042] Step 1: Mix kitchen waste oil, sodium dodecylbenzene sulfonate and water, add to the reaction kettle, react and stir at 115°C for 2.1 hours, hydrolyze into unsaturated fatty acids, continue to keep warm at 122°C and use Water jet negative pressure machine pumping negative pressure dehydration for 1.1h;

[0043] Wherein the volume ratio of kitchen waste waste oil, sodium dodecylbenzenesulfonate and water is 55:10:35, and the stirring speed is 90 rpm;

[0044] Step 2: Add hydroxyethylethylenediamine and potassium hydroxide to the product obtained in Step 1, raise the temperature to 160° C. and keep it warm for 1.1 h, stop heating after reacting and stirring for 8 h, and obtain fatty alcohol amides containing ethylenic bonds;

[0045] Wherein the volume ratio of hydroxyethylethylenediamine and potassium hydroxide is 10:0.5, and the stirring speed is 90 r...

Embodiment 3

[0049] A kind of preparation method of high temperature resistant emulsifier for oil base drilling fluid is as follows:

[0050] Step 1: Mix the mixture of kitchen waste oil, dodecylbenzenesulfonic acid and sodium dodecylbenzenesulfonate and water, then add it to the reaction kettle, react and stir at 115°C for 2.1h, and hydrolyze it into unsaturated fatty acids , continue to keep warm at a temperature of 122°C and use a water jet negative pressure machine to dehydrate under negative pressure for 1.1h;

[0051] Wherein the volume ratio of the mixture of kitchen waste waste oil, dodecylbenzenesulfonic acid and sodium dodecylbenzenesulfonate to water is 60:10:30, and the stirring speed is 100 rpm;

[0052] Step 2: add triethanolamine and potassium hydroxide to the product obtained in step 1, raise the temperature to 170°C and keep it warm for 1.15 hours, stop heating after reacting and stirring for 9 hours, and obtain fatty alcohol amides containing ethylenic bonds;

[0053] Wh...

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Abstract

The invention discloses a high-temperature-resistant emulsifier for oil-based drilling fluid and a preparation method thereof. The kitchen waste oil refining agent is prepared from the following components in parts by mass: 45 to 75 parts of refined kitchen waste oil, 0.2 to 1 part of a catalyst, 5 to 20 parts of alkylol amine, 5 to 25 parts of an anionic surfactant, 0 to 10 parts of a nonionic surfactant and 0 to 15 parts of an additive. According to the invention, refined kitchen waste oil is used as a raw material; alcohol amide containing olefinic bonds is generated through hydrolysis, glycerol removal, hydrolysis into saturated fatty acid and unsaturated fatty acid and reaction with amide by utilizing the property that the unsaturated fatty acid contains the olefinic bonds, and is used as an emulsifier with good performance for oil field drilling fluid, and a new solving method is found for increasing kitchen waste oil treatment difficulty. Meanwhile, the kitchen waste oil is usedas a main raw material, so that the kitchen waste oil is changed into useful industrial resources, waste is turned into wealth, the bottleneck of recycling of the kitchen waste oil is broken through,and secondary eating of the kitchen waste oil is blocked from the source.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and relates to an emulsifier for oil-based drilling fluid, in particular to a high-temperature-resistant emulsifier for oil-based drilling fluid and a preparation method thereof. Background technique [0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. It can be divided into many types. The common ones are water-based drilling fluid, oil-based drilling fluid and gas drilling fluid. Water-based drilling fluid is a multi-phase dispersion system composed of bentonite, water (or brine), various treatment agents, weighting materials and drilling cuttings. It has the characteristics of low price and low pollution, but the reuse rate is low and the settlement effect Poor control. [0003] Compared with water-based drilling fluids, oil-based drilling fluids have many advantages such as high temperature resistance, salt and calcium intrusion resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/36
CPCC09K8/36
Inventor 任增强刘德利张瑾
Owner 天津市海罗兰科技发展股份有限公司
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