Flow pattern adjusting agent for high-density oil base drilling fluid and preparation method as well as application of flow pattern adjusting agent
A flow-pattern regulator, oil-based drilling fluid technology, applied in the preparation of sulfonates, carboxylic acid amides, chemical instruments and methods, etc. and other problems, to achieve the effect of being conducive to large-scale production and popularization and application, simple synthesis steps, and good comprehensive performance
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[0047] The invention provides a method for preparing a flow pattern regulator for high-density oil-based drilling fluid, comprising:
[0048] The long-chain hydrocarbyl amido tertiary amine is reacted with a quaternizing agent in a solvent to obtain a flow pattern regulator for high-density oil-based drilling fluid;
[0049] The long-chain hydrocarbyl amido tertiary amine has a formula II structure:
[0050]
[0051] Described quaternization reagent has formula III structure:
[0052] X-R 2 -Y-Na formula III;
[0053] The high-density oil-based drilling fluid flow regulator has a formula I structure:
[0054]
[0055] Among them, R 1 Selected from C8~22 alkyl or C17~21 alkenyl;
[0056] R 2 for methylene or R 3 for -(CH 2 ) 3 -or
[0057] X is selected from halogen; Y - for-COO - or SO 3 - .
[0058] The preparation method of the flow pattern regulator provided by the invention has the characteristics of simple synthesis steps, mild reaction conditions...
Embodiment 1
[0076] In a 500mL four-necked flask equipped with a thermometer, a condenser, and a stirrer, add 68.32g of stearamidopropyldimethylamine and 100g of water, and heat up to 80°C under stirring; weigh 21.68g of sodium chloroacetate and dissolve it in 110g Put it in the dropping funnel in water, drop it into the above-mentioned four-necked flask at a speed of 5 drops / second, continue to react for 6 hours after the dropwise addition, and obtain a white liquid product with a solid content of 30%, which is a high-density oil-based Flow pattern modifier for drilling fluid, can be used directly.
[0077] The obtained product is characterized and analyzed, and the results can be found in figure 1 and figure 2 . figure 1It is the infrared spectrogram of the product obtained in Example 1 of the present invention, as can be seen, 3315.28cm- 1 It is the stretching vibration absorption peak of imide, 2919.22cm- 1 and 2850.55cm- 1 -CH in the hydrophobic long chain of the flow regulator ...
Embodiment 2
[0081] In a 500mL four-neck flask equipped with a thermometer, condenser, and stirrer, add 80.38g of octylamidopropyldimethylamine and a mixed solvent composed of 20g of ethanol and 60g of water, and heat up to 80°C under stirring; Take 69.62g of sodium 3-chloro-2-hydroxypropanesulfonate, dissolve it in 70g of water and place it in the dropping funnel, add it dropwise to the above four-necked flask at a speed of 2-3 drops / second, and continue the reaction after the addition is complete After 8 hours, a light yellow liquid product with a solid content of 50% was obtained, which was the flow pattern regulator for high-density oil-based drilling fluid.
[0082] The resulting product is a flow regulator for high-density oil-based drilling fluid shown in formula I, wherein R 1 is octyl; Y - for-SO 3 ; 2 for R 3 for -(CH 2 ) 3 -.
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