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A multi-component polymer fluid loss reducer and its preparation method

A fluid loss reducer and polymer technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of slow development of low temperature strength, accelerated development, and prolonged thickening time of cement slurry, so as to achieve control of water loss, Good water loss, improve the effect of high temperature resistance

Active Publication Date: 2021-03-16
成都欧美克石油科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many types of fluid loss reducers have also been developed in China, but there is still a lack of high temperature fluid loss reducers with a wide range of application temperature and stable performance, especially at 120°C, the phenomenon of "bulging" and "core wrapping" will appear in the thickening experiment , the problem of slow development of low temperature strength
At the same time, for the fluid loss reducer containing acrylamide (AM) monomer, the rate of hydrolysis of the amide group of AM to carboxyl group increases with the increase of temperature, which exceeds the effect of cement hydration acceleration with the increase of temperature, resulting in temperature increase. The case where the thickening time of high cement slurry is prolonged

Method used

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  • A multi-component polymer fluid loss reducer and its preparation method
  • A multi-component polymer fluid loss reducer and its preparation method
  • A multi-component polymer fluid loss reducer and its preparation method

Examples

Experimental program
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Embodiment 1

[0024] This example provides a preparation method of a multi-component polymer fluid loss reducer, comprising the following steps: in parts by weight, add 20 parts of AMPS to water to dissolve to form a solution, and then add 0.1 part of hydrogen with a mass concentration of 30% Adjust the pH of the sodium oxide solution to 6, then add 2 parts of AA, 1 part of ACMO and 1 part of NVP; stir until completely dissolved, then add 0.05 parts of isopropanol, place in a constant temperature water bath at 45°C, and wait until the temperature of the solution rises Nitrogen was blown until there was no oxygen, then 0.1 part of ammonium persulfate-sodium bisulfite solution with a mass concentration of 10% was added, stirred and continued to react for 4 hours to prepare a copolymer solution, and obtain a multi-polymer fluid loss reducer.

Embodiment 2

[0026] This embodiment provides a preparation method of a multi-component polymer fluid loss reducer, comprising the following steps: in parts by weight, add 40 parts of AMPS to water to dissolve to form a solution, and then add 5 parts of hydrogen with a mass concentration of 30% Potassium oxide solution to adjust the pH to 7, then add 10 parts of AA, 5 parts of ACMO and 10 parts of NVP; stir until completely dissolved, then add 0.05 parts of sodium formate, place in a constant temperature water bath at 65 ° C, and pass it into the solution after the temperature rises Nitrogen until there is no oxygen, then add 5 parts of potassium persulfate solution with a mass concentration of 10%, stir and continue to react for 6 hours to prepare a copolymer solution, and obtain a multi-polymer fluid loss reducer.

Embodiment 3

[0028] This example provides a preparation method of a multi-component polymer fluid loss reducer, comprising the following steps: in parts by weight, add 40 parts of AMPS to water, dissolve to form a solution, and then add 5 parts of carbonic acid with a mass concentration of 30%. Adjust the pH of the sodium solution to 6.5, then add 10 parts of AA, 10 parts of ACMO and 10 parts of NVP; stir until completely dissolved, then add 0.1 part of dodecyl mercaptan, place in a constant temperature water bath at 50 °C, and wait until the temperature of the solution After ascending, nitrogen gas was introduced until there was no oxygen, and then 2 parts of potassium persulfate solution with a mass concentration of 10% was added, stirred and continued to react for 5 hours to prepare a copolymer solution, and obtain a multi-polymer fluid loss reducer.

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Abstract

The invention belongs to the technical field of oilfield chemistry and oil and gas well cementing, and provides a multipolymer fluid loss additive and a preparation method thereof. The raw materials of the fluid loss additive include 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, acrylamide morpholine, N-vinyl pyrrolidone, a pH conditioning agent, an initiator, and a chain transferring agent, with the balance being water. The fluid loss additive can be used for high temperature deep well cementing and shale gas horizontal well cementing, and water loss can be effectively reduced without affecting thickening time and thickening line shapes. The preparation method is scientific in design, simple in operation and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical fields of oilfield chemistry and oil-gas well cementing, and in particular relates to a multi-component polymer fluid loss reducer and a preparation method thereof. Background technique [0002] Fluid loss reducer is one of the most important oil well cement admixtures, and its performance is closely related to the quality of cementing operations. At present, foreign companies have developed a series of mature fluid loss reducer products, and new research results are constantly being produced. Many types of fluid loss reducers have also been developed in China, but there is still a lack of high temperature fluid loss reducers with a wide range of application temperature and stable performance, especially at 120°C, the phenomenon of "bulging" and "core wrapping" will appear in the thickening experiment , the problem of slow development of low temperature strength. At the same time, for the fluid loss reducer cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F220/06C08F226/10C09K8/487C04B24/16C04B103/46
CPCC04B24/163C04B2103/46C08F220/58C09K8/487C08F220/585C08F220/06C08F226/10
Inventor 罗庆唐昌强高金李勇陈蔚
Owner 成都欧美克石油科技股份有限公司