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High-temperature-resistant water-based constant-rheological flow pattern regulator and preparation method thereof

A flow pattern regulator, high temperature resistant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve good constant flow and sand-carrying ability, excellent salt resistance characteristics

Active Publication Date: 2022-03-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a high-temperature-resistant water-based constant rheological flow regulator and a preparation method thereof, which solve the following problems:

Method used

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  • High-temperature-resistant water-based constant-rheological flow pattern regulator and preparation method thereof
  • High-temperature-resistant water-based constant-rheological flow pattern regulator and preparation method thereof
  • High-temperature-resistant water-based constant-rheological flow pattern regulator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] React 100 g of hexamethylene diisocyanate and 10 g of 2-amino-4-hydroxy-6-methylpyrimidine at 80°C for 24 hours, wash the product after reaction with n-hexane for 3 times and dry it. 10g of the product, 170g of amino-terminated polyethanol with a molecular weight of 5000, was reacted in a DMF solvent at 80°C for 2 hours, dried, frozen and pulverized, sieved, and waited until component C;

Embodiment 2

[0034] Mix 30 parts of component C, 60 parts of component A with a molecular weight of 20000, and 10 parts of component B with a molecular weight of 3000, and mix them uniformly

Embodiment 3

[0035] Embodiment 3: 50g of fashion regulator in embodiment 2 are dispersed in 450ml water and stirred, after component A and component B dissolve completely, test the table of this solution at 2 ℃, 25 ℃, 80 ℃ and 120 ℃ The apparent viscosity and plastic viscosity were used to calculate the dynamic shear force.

[0036] Embodiment 4: 50g of fashion regulator among the embodiment 2, sodium chloride 120g, be dispersed in 450ml water and stir, after component A, component B and sodium chloride dissolve completely, test this solution at 2 ℃, 25 °C, apparent viscosity and plastic viscosity at 80 °C and 120 °C, and dynamic shear force was calculated.

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Abstract

The invention relates to a high-temperature-resistant water-based constant-rheology flow pattern regulator and a preparation method thereof. The high-temperature-resistant water-based constant-rheology flow pattern regulator is prepared by blending three polymers, namely a component A, a component B and a component C, the component A is polyethylene glycol, the molecular weight of the component A is 20000-600000, and the component A is 50-75 parts by mass; the component B is 5-10 parts by mass of polytetrahydrofuran with the molecular weight of 3000; the component C is polyethylene glycol powder particles containing multiple hydrogen bonds, the molecular weight of the component C is 40000-400000, and the component C is 20-40 parts by mass. The flow pattern regulator has the constant rheological property in the range of 2-120 DEG C, can resist the high temperature of 160 DEG C, can resist a sodium chloride solution with the concentration of 20 wt% and a potassium formate solution with the concentration of 50 wt%, and has good constant rheological property, temperature resistance, salt resistance and sand-carrying capacity.

Description

technical field [0001] The invention belongs to the technical field of drilling regulators, and in particular relates to a high-temperature-resistant water-based constant rheological flow regulator and a preparation method thereof. Background technique [0002] As the drilling depth increases, the downhole pressure and temperature also increase. The oil-based drilling fluid system can resist high temperature, but it will cause some pollution to the environment when it is discharged; the rheological properties of conventional water-based drilling fluid are less affected by temperature. Especially under low temperature conditions on the seabed, the viscosity and shear force of the drilling fluid increase sharply, and even gelation occurs, which seriously affects the smooth progress of deepwater drilling operations and greatly increases the drilling cost. At high temperature, the polymer viscosifier degrades severely, and the viscosity of the drilling fluid decreases, which mak...

Claims

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Application Information

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IPC IPC(8): C09K8/035
CPCC09K8/035
Inventor 王占华夏和生
Owner SICHUAN UNIV