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Preparation method and application of multi-component copolymerized filtrate reducer

A technology of fluid loss reducer and multi-component copolymerization, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reducing cement slurry viscosity and fluid loss, cumbersome configuration process, etc., to ensure water solubility, high durability Temperature, improve the effect of temperature and salt tolerance

Active Publication Date: 2022-07-22
SNF CHINA FLOCCULANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Developed a fluid loss reducer for reducing the fluid loss of cement slurry in drilling operations. This fluid loss reducer is suitable for drilling operations in high-temperature and high-salt wells. The maximum temperature can reach 200°C. Add β-acryloyloxypropionate potassium to obtain an integrated cementing additive that can inhibit shale expansion and hydration, reduce cement slurry viscosity and reduce cement slurry filtration loss, which perfectly solves the needs of cementing operations. Adding a variety of additives, the problem of cumbersome configuration process greatly improves the working efficiency

Method used

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  • Preparation method and application of multi-component copolymerized filtrate reducer
  • Preparation method and application of multi-component copolymerized filtrate reducer
  • Preparation method and application of multi-component copolymerized filtrate reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) dissolving 20 parts by mass of β-acryloyloxy potassium propionate in 450 parts of deionized water to obtain a β-acryloyloxy potassium propionate solution;

[0031] 2) after vacuuming and defoaming, the β-acryloyloxy potassium propionate solution is evenly divided into three parts;

[0032] 3) 85 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 133 parts of acrylamide and 100 parts of acryloyl morpholine were respectively added to three parts of β-acryloyloxypropionate potassium solution to obtain 2 - sodium acrylamido-2-methylpropanesulfonate solution, acrylamide solution and acryloylmorpholine solution;

[0033] 4) mixing acrylamide solution and acryloyl morpholine solution, wherein the mass ratio of acrylamide and acryloyl morpholine is 1.33:1;

[0034] 5) Add N,N'-methylenebisacrylamide, sodium hypophosphite, sodium metabisulfite, sodium persulfate to the mixed solution of step 4, wherein, N,N'-methylenebisacrylamide, sodium hypophosphite , sodium metabisu...

Embodiment 2

[0038] 1) dissolving 25 parts by mass of β-acryloyloxy potassium propionate in 450 parts of deionized water to obtain a β-acryloyloxy potassium propionate solution;

[0039] 2) after vacuuming and defoaming, the β-acryloyloxy potassium propionate solution is evenly divided into three parts;

[0040]3) 87 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 135 parts of acrylamide and 100 parts of acryloyl morpholine were respectively added to three parts of β-acryloyloxypropionate potassium solution to obtain 2 - sodium acrylamido-2-methylpropanesulfonate solution, acrylamide solution and acryloylmorpholine solution;

[0041] 4) mixing acrylamide solution and acryloyl morpholine solution, wherein the mass ratio of acrylamide and acryloyl morpholine is 1.35:1;

[0042] 5) Add N,N'-methylenebisacrylamide, sodium hypophosphite, sodium metabisulfite, sodium persulfate to the mixed solution of step 4, wherein, N,N'-methylenebisacrylamide, sodium hypophosphite , sodium metabisul...

Embodiment 3

[0046] 1) dissolving 22 parts by mass of β-acryloyloxy potassium propionate in 450 parts of deionized water to obtain a β-acryloyloxy potassium propionate solution;

[0047] 2) after vacuuming and defoaming, the β-acryloyloxy potassium propionate solution is evenly divided into three parts;

[0048] 3) 86 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 134 parts of acrylamide and 100 parts of acryloyl morpholine were respectively added to three parts of β-acryloyloxypropionate potassium solution to obtain 2 - sodium acrylamido-2-methylpropanesulfonate solution, acrylamide solution and acryloylmorpholine solution;

[0049] 4) mixing acrylamide solution and acryloyl morpholine solution, wherein the mass ratio of acrylamide and acryloyl morpholine is 1.34:1;

[0050] 5) Add N,N'-methylenebisacrylamide, sodium hypophosphite, sodium metabisulfite, sodium persulfate to the mixed solution of step 4, wherein, N,N'-methylenebisacrylamide, sodium hypophosphite , sodium metabisu...

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Abstract

The invention provides a preparation method and application of a multi-component copolymerized filtrate reducer, which comprises the following steps: carrying out polymerization reaction by introducing three or more vinyl-containing monomers, vinyl-containing amide morpholine and derivatives thereof, and adding a proper cross-linking agent, so that the molecular main chain of the polymer is moderately cross-linked to obtain the multi-component copolymerized filtrate reducer. The water solubility of the polymer is ensured, the rigidity and mechanical and chemical stability of a macromolecular chain are enhanced, and compared with a linear polymer, the polymer is endowed with higher temperature resistance, shear resistance and salt resistance. The invention develops the filtrate reducer for reducing the filter loss of the cement paste in the drilling operation, the filtrate reducer is suitable for the drilling operation of a high-temperature and high-salt well, and the integrated well cementation additive which has the functions of inhibiting shale swelling and hydration, reducing the viscosity of the cement paste and reducing the filter loss of the cement paste is obtained because the filtrate reducer contains beta-acryloyloxy potassium propionate. The problems that multiple auxiliaries need to be added in the well cementation operation, and the preparation process is tedious are perfectly solved, and the operation efficiency is greatly improved.

Description

technical field [0001] The invention relates to a fluid loss reducer in the fields of oil and gas well cementing and oilfield chemical additives, and more particularly, to a fluid loss reducer for oil well cement and a preparation method and application thereof. Background technique [0002] At present, oil well cement slurry fluid loss reducers commonly used in oilfields mainly include cellulose and its modified products, polyvinyl alcohol and its modified products. The above two types basically have no salt resistance and limited temperature resistance. They are mainly used in Cementing operation below 110℃. The third type is a multi-copolymer product with 2-acrylamido-2-methylpropanesulfonic acid (AMPS) as the main monomer. This type of fluid loss reducer has stronger temperature resistance and salt resistance, and the highest temperature resistance reaches 180 ℃, resistant to saturated saline. [0003] Existing oil well cement fluid loss reducers generally use monomers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/28C08F222/38C08F4/40C09K8/035
CPCC08F220/56C08F4/40C09K8/035C08F220/58C08F220/585C08F220/283C08F222/385Y02W30/91
Inventor 凌静田鹭徐青林
Owner SNF CHINA FLOCCULANT
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