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Modified soybean lecithin drilling fluid lubricant and preparation method thereof

A soybean lecithin and drilling fluid technology, which is applied in the field of petroleum drilling fluid, can solve the problems of reducing the utilization rate of soybean lecithin, limited improvement of lecithin water dispersion ability, and few hydrophilic groups

Pending Publication Date: 2022-06-21
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this modification scheme introduces fewer hydrophilic groups, which limits the improvement of lecithin water dispersibility
The construction of phosphate ester drilling fluid lubricants in a synthetic form reduces the utilization rate of the existing cheap raw material soybean lecithin

Method used

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  • Modified soybean lecithin drilling fluid lubricant and preparation method thereof
  • Modified soybean lecithin drilling fluid lubricant and preparation method thereof
  • Modified soybean lecithin drilling fluid lubricant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 50 g of soybean lecithin with 80 mL of ethanol, form a dispersion under heating at 80 °C, add 7.0 g of diethanolamine and 0.1 g of p-toluenesulfonic acid, heat under reflux at 80 °C for 6 hours, and add 4.0 g of epichlorohydrin. After heating at 60°C for 3 hours, 3.0 g of potassium carbonate and 5.0 g of 2-mercaptothiazoline were added. After heating at 60°C for 12 hours, the solvent ethanol was distilled off under reduced pressure to obtain the final soybean lecithin modified lubricant.

Embodiment 2

[0029] Mix 50 g of soybean lecithin with 80 mL of ethanol, form a dispersion under heating at 80 °C, add 7.0 g of diethanolamine and 0.1 g of p-toluenesulfonic acid, heat under reflux at 80 °C for 6 hours, and add 4.0 g of epichlorohydrin. After heating at 60 °C for 3 hours, 3.0 g of potassium carbonate and 7.0 g of 2-mercaptobenzothiazole were added, and after heating at 80 °C for 8 hours, the solvent ethanol was distilled off under reduced pressure to obtain the final soybean lecithin modified lubricant.

Embodiment 3

[0031] Mix 50g soybean lecithin with 120mL ethanol, form a dispersion under heating at 80°C, add 7.0g diethanolamine, 0.1g sulfuric acid, heat under reflux at 80°C for 6 hours, add 4.0g epichlorohydrin, heat at 60°C After 3 hours of reaction, 2.0 g of sodium carbonate and 3.0 g of imidazole were added, and after heating at 60°C for 6 hours, the solvent ethanol was distilled off under reduced pressure to obtain the final soybean lecithin modified lubricant.

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Abstract

The invention relates to the field of petroleum drilling fluids, in particular to a modified soybean lecithin drilling fluid lubricant and a preparation method thereof, the water dispersion capacity of soybean lecithin is improved by adopting ammonolysis modification, so that the lubricant can be uniformly dispersed in a water-based drilling fluid, and the lubricating effect is fully exerted. Nitrogen-containing heterocyclic rings are adopted to modify and improve the combining capacity of the lubricant and a friction surface, so that the lubricating capacity of the lubricant is improved. The preparation method comprises the following steps: (1) mixing soybean lecithin, amine, protonic acid and a lower alcohol solvent, heating, stirring and reacting, (2) adding epoxy chloropropane into the reaction solution, heating, stirring and reacting, (3) adding a nitrogen-containing heterocyclic compound and an acid-binding agent into the solution, mixing, stirring and heating, and cooling to room temperature. And distilling out the solvent lower alcohol to obtain the final modified soybean lecithin drilling fluid lubricant. The soybean lecithin modified lubricant provided by the invention has the advantages of easily available synthetic raw materials, simple synthetic process, strong water dispersion ability, stable structure, environmental protection, high temperature resistance and excellent lubricating effect.

Description

technical field [0001] The invention relates to the field of petroleum drilling fluid, in particular to a modified soybean lecithin drilling fluid lubricant and a preparation method thereof. Background technique [0002] In the process of oil drilling, as the drilling efforts of complex wells such as inclined wells, extended-reach wells, and horizontal wells continue to increase, problems such as high friction torque, supporting pressure, and sticking seriously restrict the development of drilling work, and efficient drilling fluid lubrication The demand for drugs is increasing. The lubrication mechanism of the drilling fluid lubricant is that the lubricant is adsorbed on the surface of the drilling tool, well wall and casing, and forms a hydrophobic lubricating film to provide lubrication effect. At present, the construction strategy of drilling fluid lubricants is usually to form drilling fluid lubricants from extreme pressure materials, anti-wear materials and materials ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/22C07F9/09C07F9/117C07F9/6506C07F9/6539C07F9/6518
CPCC09K8/035C09K8/22C07F9/091C07F9/117C07F9/6506C07F9/6539C07F9/6541C07F9/65188C09K2208/34
Inventor 王承俊李绪锋孙浩玉李公让李文博刘振东李卉
Owner SINOPEC SSC
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