Low-cost emulsifying agent applied to oil-based drilling fluid and preparation method thereof
An oil-based drilling fluid, low-cost technology, applied in the field of oil drilling fluid, can solve the problems of increasing the difficulty and cost of on-site operation, unfavorable drilling fluid system stability, lower demulsification voltage, etc., and achieves strong industrial operability and convenience. Promotion and application, the effect of high demulsification voltage
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[0032] like figure 1 Shown, be a kind of preparation method of the low-cost emulsifier that is applied to oil-based drilling fluid of the present invention, it may further comprise the steps:
[0033] A. Preparation of oxidized fatty acid: Add fatty acid into the reaction kettle, heat to 120-130°C while stirring, feed air or oxygen at a gas rate of 1-7L / h, keep warm for 8-12 hours, and keep it warm for 8-12 hours. Measure the acid value of the material for 2 hours until the acid value is <170mgKOH / g; cool the temperature of the material to 60°C, and discharge the material to obtain oxidized fatty acid;
[0034] B. Preparation of maleated tall oil fatty acid: add crude tall oil fatty acid to the reactor, and heat to 130-150°C while stirring; add maleic anhydride to the reactor, and heat rapidly so that the temperature of the reactor rises to 230°C, heat preservation reaction for 4~6h, measure the acid value of the material every 1h during the reaction process, until the acid v...
Embodiment 1
[0040] Embodiment 1: the preparation of low-cost emulsifier
[0041] A low-cost emulsifier applied to oil-based drilling fluid and its preparation method. Based on the total mass of the emulsifier as 100%, the composition of the emulsifier includes: 70% of oxidized fatty acid, 15% of maleated tall oil fatty acid %, oleic acid 13%, sodium octadecylbenzenesulfonate 2%.
[0042] The above-mentioned components are prepared according to the following steps:
[0043] A. Preparation of oxidized fatty acid: to 10m 3 Add 5t of soybean oil oleic acid into the reaction kettle, start stirring, heat with heat transfer oil, and heat the soybean oil oleic acid to 130°C while stirring; feed oxygen through the vent pipe at the bottom of the reaction kettle, keep the gas velocity at 4L / h, and maintain the temperature React for 8 to 12 hours; during the reaction process, take samples every 2 hours to measure the acid value of the material, until the acid value <170mgKOH / g, the reaction is over...
Embodiment 2
[0046] Embodiment 2: the preparation of low-cost emulsifier
[0047] A low-cost emulsifier applied to oil-based drilling fluid. Based on the sum of the mass percentages of the emulsifier being 100%, the composition of the emulsifier includes: 45% oxidized fatty acid, 30% maleated tall oil fatty acid, Animal oleic acid 20%, sodium octadecylbenzene sulfonate 5%.
[0048] In this example, the oxidized fatty acid is a reaction product obtained by reacting tallow oleic acid with air through heating; the maleated tall oil fatty acid is obtained by reacting crude tall oil fatty acid and maleic anhydride in a mass ratio of 3:1 product.
[0049] The preparation method is the same as in Example 1.
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