A kind of oil well cement suspension type polymer retarder and preparation method and oil well cement slurry system

An oil well cement and polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of oil, gas, water channeling, limiting the scope of application, affecting the quality of cementing, etc., and achieves a small difference in density. , Wide application range, good strength consistency

Active Publication Date: 2021-07-16
卫辉市化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The upper part of the settled cement slurry is easy to produce free liquid, causing oil, gas and water to channel. During the solidification process, the density of the upper and lower parts of cement stone is different, resulting in different strength, which seriously affects the cementing quality and limits its application range

Method used

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  • A kind of oil well cement suspension type polymer retarder and preparation method and oil well cement slurry system
  • A kind of oil well cement suspension type polymer retarder and preparation method and oil well cement slurry system

Examples

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Embodiment 1

[0032] The oil well cement suspension polymer retarder of this embodiment is composed of the following components: 2-acrylamide-2-methylpropanesulfonic acid 300g, itaconic acid 70g, isopropanol 3g, high viscosity carboxymethyl for drilling fluid 3 g of cellulose-based sodium salt (HV-CMC), 150 g of aqueous sodium hydroxide solution with a concentration of 40 wt %, 575 g of deionized water, 5 g of sodium persulfate and 2.5 g of sodium sulfite.

[0033] The preparation method of the oil well cement suspension type polymer retarder of the present embodiment is as follows: 1. first get 20g deionized water and 5g sodium persulfate to be mixed with solution A, get 20g deionized water and 2.5g sodium sulfite to be mixed with solution B, take 147g Deionized water and 3g high-viscosity carboxymethyl cellulose sodium salt (HV-CMC) for drilling fluid [The manufacturer of high-viscosity carboxymethyl cellulose sodium salt (HV-CMC) for drilling fluid is Puyang Zhongyuan Sanli Industrial Co....

Embodiment 2

[0036] The oil well cement suspension polymer retarder of this embodiment is composed of the following components: 2-acrylamide-2-methylpropanesulfonic acid 300g, itaconic acid 70g, isopropanol 3g, high viscosity carboxymethyl for drilling fluid Cellulose sodium salt (HV-CMC) 2g, concentration 40wt% sodium hydroxide aqueous solution 150g, deionized water 575g, sodium persulfate 5g and sodium sulfite 2.5g.

[0037] The preparation method of the oil well cement suspension type polymer retarder of the present embodiment is as follows: 1. first get 20g deionized water and 5g sodium persulfate to be mixed with solution A, get 20g deionized water and 2.5g sodium sulfite to be mixed with solution B, take 147g Deionized water and 2g high-viscosity carboxymethyl cellulose sodium salt (HV-CMC) for drilling fluid [The manufacturer of high-viscosity carboxymethyl cellulose sodium salt (HV-CMC) for drilling fluid is Puyang Zhongyuan Sanli Industrial Co., Ltd. , the product standard is "Car...

Embodiment 3

[0040] The oil well cement suspension polymer retarder of this embodiment is composed of the following components: 2-acrylamide-2-methylpropanesulfonic acid 300g, itaconic acid 70g, isopropanol 3g, high viscosity carboxymethyl for drilling fluid Base cellulose sodium salt (HV-CMC) 4g, concentration is 150g of sodium hydroxide aqueous solution of 40wt%, deionized water 575g, sodium persulfate 5g and sodium sulfite 2.5g.

[0041] The preparation method of the oil well cement suspension type polymer retarder of the present embodiment is as follows: 1. first get 20g deionized water and 5g sodium persulfate to be mixed with solution A, get 20g deionized water and 2.5g sodium sulfite to be mixed with solution B, take 147g Deionized water and 4g high-viscosity carboxymethyl cellulose sodium salt (HV-CMC) for drilling fluid [The manufacturer of high-viscosity carboxymethyl cellulose sodium salt (HV-CMC) for drilling fluid is Puyang Zhongyuan Sanli Industrial Co., Ltd. , the product st...

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Abstract

The invention discloses an oil well cement suspended polymer retarder, a preparation method and an oil well cement slurry system. The oil well cement suspended polymer retarder consists of the following components: 2-acrylamide-2-methylpropanesulfonic acid, Itaconic acid, isopropanol, high-viscosity carboxymethylcellulose sodium salt (HV-CMC) for drilling fluid, 40 wt% sodium hydroxide aqueous solution, deionized water, sodium persulfate and sodium sulfite. The oil well cement slurry system is composed of basic formula cement slurry and oil well cement suspension polymer retarder. The basic formula cement slurry is composed of the following components: G grade high sulfate-resistant oil well cement 600 parts by weight + quartz sand 210 parts by weight + 42 parts by weight of G310 + 24 parts by weight of oil well cement polymer retarder + 312 parts by weight of tap water. The oil well cement suspension type polymer retarder of the present invention has the characteristics of suspension and has a wide range of applications; it can ensure the stability of the cement slurry, ensure that the cement stone has a small density difference between the upper and lower parts during the solidification process, and has good strength consistency, ensuring Cementing quality.

Description

technical field [0001] The invention relates to the technical field of well cementing for oil and gas production. Specifically, it relates to an oil well cement suspension type polymer retarder, a preparation method and an oil well cement slurry system. Background technique [0002] At present, with the deep development of oil and gas exploration and development, it is necessary to ensure the pumpability of the cement slurry for a certain period of time during the cementing construction, and it is necessary to add a retarder to ensure the safety of the cementing construction. Commonly used polymer retarders are copolymers of monomers such as AMPS and itaconic acid. Due to a large number of sulfonic acid groups and carboxyl groups, this type of polymer retarder not only has high temperature retarding properties, but also has strong Dispersion performance, when delaying cement slurry coagulation, easily cause cement slurry settlement (applicant's previous research about cemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F222/02C09K8/467
CPCC08F220/58C09K8/467C08F220/585C08F222/02
Inventor 梁艳丽李鹏翔王爱民靳建忠穆莺樊晓雅宋耀敏李新芬郭娟李林锋
Owner 卫辉市化工有限公司
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