Polyamine inhibitor for drilling fluids and method for preparing polyamine inhibitor

A polyamine inhibitor and drilling fluid technology, which is applied in the preparation of amino compounds, chemical instruments and methods, and the preparation of organic compounds, can solve the problem of not being able to well inhibit the hydration expansion of mud shale and that the treatment agent cannot reach the storage area. problems such as layer protection and environmental protection, to achieve the effects of wellbore cleaning, guaranteed performance, and high-temperature rheological properties

Inactive Publication Date: 2012-06-20
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these shale inhibitors encounter mud shale with high water sensitivity, strong dispersion, and high montmorillonite content, they still cannot well

Method used

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  • Polyamine inhibitor for drilling fluids and method for preparing polyamine inhibitor
  • Polyamine inhibitor for drilling fluids and method for preparing polyamine inhibitor
  • Polyamine inhibitor for drilling fluids and method for preparing polyamine inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 60g of hydroxyl-terminated polybutadiene (molecular weight: 2000), 58g of p-toluenesulfonyl chloride, and 69.2g of pyridine into a three-necked flask, maintain the temperature at about 20°C, and stir to dissolve. The reaction time was 13 hours. After the reaction is completed, filter to obtain a light yellow liquid, which is dissolved in water. After static phase separation, the lower layer liquid is removed, and the water is distilled off under reduced pressure to obtain the terminal sulfoester compound. Take another three-neck flask (with a stirring reflux device), add 32.5g of m-phenylenediamine, 90ml of precipitant toluene, heat up to 85°C, start to reflux, add the above esterification solution dropwise, react for 2 hours, cool and filter to obtain Pale yellow liquid, the solvent and m-phenylenediamine are distilled off under reduced pressure to obtain the polyamine inhibitor.

[0025] The total reaction yield is 92.6%, and the viscosity is 10.2mPa.S.

Embodiment 2

[0027] Take 40g of hydroxyl-terminated polybutadiene (molecular weight: 1000), 100g of methanesulfonyl chloride, and 120g of sodium carbonate into a three-necked flask, maintain the temperature at about 10°C, and stir to dissolve. The reaction time was 11 hours. After the reaction is completed, filter, dissolve the filtrate in water, and after static phase separation, take the liquid in the lower layer, and distill under reduced pressure to remove the water to obtain the terminal sulfoester compound. Take another three-neck flask (with a stirring reflux device), add 90.2g of polypropylene glycol diamine, 150ml of precipitant DMF, heat up to 90°C, start to reflux, add the above esterification solution dropwise, react for 3 hours, cool and filter to obtain a shallow Yellow liquid, distilled off under reduced pressure to remove the solvent and polypropylene glycol diamine to obtain the polyamine inhibitor.

[0028] The total reaction yield is 94.3%, and the viscosity is 7.8mPa.S...

Embodiment 3

[0030] Take 20g of hydroxyl-terminated polybutadiene (molecular weight: 400), 190g of toluenesulfonyl chloride, and 92g of triethylamine into a three-necked flask, maintain the temperature at about 15°C, and stir to dissolve. The reaction time was 8 hours. After the reaction is completed, filter, dissolve the filtrate in water, and after static phase separation, take the liquid in the lower layer, and distill under reduced pressure to remove the water to obtain the terminal sulfoester compound. Take another three-neck flask (with a stirring reflux device), add 56.2 g of butylamine, 200 ml of cyclohexane as a precipitating agent, raise the temperature to 120 ° C, start to reflux, add the above esterification solution dropwise, react for 2 hours, cool and filter to obtain Pale yellow liquid, distilled off under reduced pressure to remove the solvent and butylamine to obtain the polyamine inhibitor.

[0031] The total reaction yield is 96.7%, and the viscosity is 6.4mPa.S.

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Abstract

The invention relates to a polyamine inhibitor for drilling fluids and a method for preparing the polyamine inhibitor. The method comprises the steps as follows: an initiator and an acid-binding agent are placed in a reactor, under the normal pressure and the nitrogen protection, a sulfonylation agent is dripped into the reactor to conduct the sulfonylation reaction, the sulfonylation reaction is 10 to 12 hours, the sulfonylation temperature is 0 to 30 DEG C, reactants are filtered, filtrate is dissolved in the water, the lower-layer fluid is taken down after static split phase of the filtrate, water is removed through reduced pressure distillation, and end sulfo-group esters are obtained; the end sulfo-group esters are dripped into a reaction kettle filled with aminating agents and precipitating agents to conduct the amination, the reaction time is 2 to 3 hours, the amination temperature is 70 to 90 DEG C, products are filtered, solvents are removed through reduced pressure distillation, and the polyamine inhibitor is obtained; and the additive is suitable for various water-based drilling fluids, can control hydration and dispersion of clay shale well, effectively solves the problems that the drilling fluid is thickened and degraded in performance since the clay shale is hydrated and dispersed, and provides a certain guarantee for safely and efficiently drilling.

Description

technical field [0001] The invention relates to a method for synthesizing an inhibitor for drilling fluid, which is suitable for water-based drilling fluid and can effectively prevent the hydration and dispersion of clay minerals during the drilling process—polyamine inhibitor. Background technique [0002] The hydration and dispersion of clay minerals in shale during the drilling process is the main reason for borehole diameter shrinkage and borehole wall collapse. At the same time, the dispersion of cuttings causes excessive clay content in drilling fluid and an increase in submicron particles, resulting in increased drilling fluid. Thickness and performance deterioration can easily lead to downhole complex accidents such as resistance during tripping and drill sticking, which greatly increases the cost and difficulty of drilling operations. Therefore, high-efficiency inhibitors for drilling fluids have been a research hotspot in recent years, and various shale inhibitors ...

Claims

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Application Information

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IPC IPC(8): C08F36/06C08F8/34C08F8/32C08G65/00C07C217/08C07C213/02C07C211/21C07C209/16C09K8/24
Inventor 徐鸿志宋有胜王宇宾郝志伟汤发明王雪莹
Owner BC P INC CHINA NAT PETROLEUM CORP
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