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Dispersing method of nano-silica for water-based drilling fluid

A nano-silica, water-based drilling fluid technology, applied in the field of water-based drilling fluid, can solve the problem of not mentioning the particle size of nanomaterials, and achieve the advantages of saving preparation cost, good separation, good economic and social benefits. Effect

Inactive Publication Date: 2019-08-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention patent does not mention the particle size of nanomaterials after dispersion, and the dispersant used in the present invention is different from it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example is to illustrate the dispersion method of nano-silica for water-based drilling fluid.

[0035] (1) adding dispersant sodium dodecylbenzenesulfonate, sodium hexametaphosphate and polyethylene glycol into 300mL deionized water according to the mass ratio of 1:0.5:1.5, and stirring for 5min at a rotating speed of 800r / min;

[0036] (2) adding 2% nano-silicon dioxide to the solution of step (1), stirring at a rotating speed of 9000r / min for 10min;

[0037] (3) Ultrasonic wave (ultrasonic frequency is 30KHz) is used to treat the solution of step (2) for 15min to obtain nano-silica dispersion system A1.

Embodiment 2

[0039] This example is to illustrate the dispersion method of nano-silica for water-based drilling fluid.

[0040] (1) adding dispersant sodium dodecylbenzenesulfonate, sodium hexametaphosphate and polyethylene glycol into 300mL deionized water according to the mass ratio of 1:1.5:1.5, and stirring for 5min at a rotating speed of 900r / min;

[0041] (2) adding 2% nano-silicon dioxide to the solution of step (1), stirring for 15min at a rotating speed of 10000r / min;

[0042] (3) Ultrasonic wave (ultrasonic frequency is 32KHz) is used to treat the solution of step (2) for 10min to obtain nano-silica dispersion system A2.

Embodiment 3

[0044] This example is to illustrate the dispersion method of nano-silica for water-based drilling fluid.

[0045] (1) adding dispersant sodium dodecyl benzene sulfonate, sodium hexametaphosphate and polyethylene glycol into 300mL deionized water according to the mass ratio of 1:2:1.5, and stirring for 5min at a rotating speed of 1000r / min;

[0046] (2) adding 2% nano-silicon dioxide to the solution of step (1), stirring for 15min at a rotating speed of 11000r / min;

[0047] (3) Using ultrasonic waves (ultrasonic frequency is 35KHz) to treat the solution of step (2) for 20min to obtain nano-silica dispersion system A3.

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Abstract

The invention relates to a dispersing method of nano-silica for a water-based drilling fluid. Through compounding of an anionic surfactant, an inorganic surfactant and a high molecular surfactant andunder the synergistic effect of ultrasonic dispersion, dispersity of the nano-silica in the water-based drilling fluid is effectively improved. By the method provided by the invention, the nano-silicain the water-based drilling fluid can be dispersed to a micronano size, and agglomeration of the nano-silica is effectively controlled. The invention lays a good foundation for blocking off micro-nano pores and microcracks in the stratum by the nano-material.

Description

technical field [0001] The invention relates to the field of water-based drilling fluids, in particular to a method for dispersing nano-silica for water-based drilling fluids. Background technique [0002] Due to the small particle size and large specific surface area of ​​nano-silica, it has the advantages of surface interface effect, small size effect and quantum size effect of nanomaterials, and nano-silica particles also have good chemical inertness, compatibility and colloid. stability, so it is widely used. However, its surface has a large number of active hydroxyl groups and strong hydrophilicity, which makes it easy to form agglomerates or secondary aggregation, which is not conducive to its dispersion in water-based drilling fluids, thereby affecting the structure and properties of nano-silica. [0003] At present, the most common methods for dispersing nanomaterials are physical dispersion and chemical treatment dispersion. Physical dispersion includes mechanical...

Claims

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Application Information

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IPC IPC(8): C09K8/03
CPCC09K8/03C09K2208/10
Inventor 王平全龙海锋白杨谢刚王玮璐任研君罗显粱
Owner SOUTHWEST PETROLEUM UNIV