Preparation method of element organic polymer type high temperature resistant retarder

Abstract

The application discloses a preparation method of an element organic polymer type high-temperature resistant retarder, and belongs to the technical field of cementing materials. The method comprises the following steps: (1) dissolving vinyl silane in deionized water to obtain a vinyl silane hydrolysate; (2) adding the vinyl silane hydrolysate into a boric acid or phosphoric acid solution, stirring and reacting for 6-8 hours to obtain A liquid; (3) adding AMPS and deionized water into a three-necked flask provided with a stirring device and a thermometer, and then adding H2O2 after the AMPS is fully dissolved; (4) mixing a chain transfer agent, V C and deionized water to obtain B liquid, and meanwhile, adding the A liquid and the B liquid into the solution in step (3) drop by drop; (5) adjusting the pH value to be 4-6, and reacting for 3-6 hours under the condition of 60-70 DEG C; and (6) freeze-drying the extract. The raw materials are cheap and easy to obtain, the preparation process is controllable, the retarder has excellent performance under the high-temperature environment of 120-205 DEG C, and has a wide market application prospect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cementing materials, and particularly relates to a preparation method of a high-temperature-resistant retarder for cementing. BACKGROUND

[0002] In recent years, with the exploration and development of deep and ultra-deep oil and gas resources, the oil well cement retarder needs to have excellent high-temperature resistance and retarding performance to ensure the safe pumping of the cement slurry. However, the traditional organic polymer type retarder is prone to degradation at high temperatures, resulting in unstable performance of the cement slurry, core-in-bag and step-out phenomena, and seriously affecting the construction safety of oil and gas well cementing.

[0003] At present, the traditional organic polymer type retarder is often polymerized from 2-acrylamido-2-methylpropanesulfonic acid AMPS and acid monomers such as acrylic acid AA and itaconic acid IA. AMPS has been widely used in the preparation of retarders due to its excellent high-temperature resistance, salt resistance, environmental friendliness, excellent retarding performance and low dosage sensitivity (Lu Ya, Li Ming, Guo Zihan, et al. Overview of Research Status of Polymer Oil Well Cement Retarder [J]. Plastics Industry, 2016, (2): 23-26, 33), but the retarder is prone to degradation at high temperatures, resulting in abnormal phenomena such as core-in-bag and step-out of the cementing cement slurry (Li Ming, Zhang Junsong, Yu Yongjin, et al. A High-Temperature-Resistant Broad-Spectrum Environmentally Friendly Retarder for Cementing and Its Preparation Method and Application: 202411270237.1 [p]. 2014-10-18). Inorganic retarders such as boric acid and its salts are extremely sensitive to dosage, which is not conducive to the control of the thickening time of the cement slurry (Yuyang. Preparation and Retarding Mechanism of Metal-Chelate Type Retarder for Oil Well Cement [D]. Chengdu: Southwest Petroleum University. 2021).

[0004] The application introduces inorganic elements phosphorus (P), silicon (Si) and boron (B) into the traditional organic polymer type retarder to form more stable chemical bonds and improve the thermal stability of the polymer. In addition, the boronic acid group and the phosphoric acid group can adsorb Ca 2+ have stronger adsorption, which helps to enhance the high-temperature retarding effect of the cement slurry, so that the oil well cement can still maintain good working performance under high-temperature conditions, effectively avoiding the occurrence of core-in-bag and step-out phenomena, and improving the construction quality and service life of the oil and gas well cementing. SUMMARY

[0005] The application aims to provide a preparation method of an element organic polymer type high-temperature resistant retarder, which is reliable in principle, simple in operation, low in raw material cost, controllable in preparation process, excellent in stability at 120-205 DEG C high-temperature environment, greatly improved in temperature resistance compared with traditional pure carbon chain polymer retarder, overcomes defects and deficiencies of the prior art, and has wide market application prospect.

[0006] The application further aims to provide application of the element organic polymer type high-temperature resistant retarder in cementing slurry, which has good high-temperature resistance and good compatibility, can effectively control the thickening time of the cementing slurry, ensures safe pumping of the cementing slurry in the cementing construction process, and effectively improves the cementing success rate.

[0007] To achieve the above technical purposes, the application adopts the following technical scheme.

[0008] First, the hydrolysis of vinyl silane generates silanol, and the condensation reaction of Si-OH and O-H in boric acid or phosphoric acid generates a monomer containing boric acid group or phosphoric acid group in the side chain; then, the carbon-carbon double bond in the prepared monomer is subjected to polyaddition reaction with 2-acrylamido-2-methylpropane sulfonic acid (AMPS) to obtain a gel-like substance with certain viscosity; finally, the gel-like substance is purified with anhydrous ethanol, repeatedly washed with deionized water, freeze-dried and ground into powder to obtain the element organic polymer type high-temperature resistant retarder. The retarder has good high-temperature resistance and good compatibility compared with traditional organic retarders by introducing inorganic elements Si, P and B, can effectively control the thickening time of the cementing slurry at 120-205 DEG C, ensures safe pumping of the cementing slurry in the cementing construction process, and overcomes the phenomena of slurry core and step caused by degradation of the traditional retarder at high temperature.

[0009] The element organic polymer type high-temperature resistant retarder is prepared by using vinyl silane, inorganic acid (boric acid or phosphoric acid) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) as raw materials, and adopting a redox initiation system H2O2 / V C .

[0010] The preparation method of the element organic polymer type high-temperature resistant retarder sequentially comprises the following steps:

[0011] (1) a certain amount of vinyl silane is weighed, dissolved in deionized water, and an organic acid is added to adjust the pH of the solution to 3-4, and the solution is stirred until it is clear to obtain a vinyl silane hydrolysis solution, and a polymerization inhibitor solution is added dropwise into the solution, and the addition amount of the polymerization inhibitor is 1% of the mass of the vinyl silane;

[0012] (2) in a three-necked flask equipped with stirring device and thermometer, add a certain amount of inorganic acid solution, the inorganic acid is boric acid or phosphoric acid, when the temperature is raised to 45~55℃, add the hydrolysis solution of vinyl silane, stir for 6~8h, to obtain A liquid;

[0013] (3) in a three-necked flask equipped with stirring device and thermometer, add a certain amount of AMPS and deionized water, start stirring, after AMPS is fully dissolved, add H2O2, stir for 15min;

[0014] (4) weigh chain transfer agent, V C and deionized water, to obtain B liquid, the amount of chain transfer agent, V C , H2O2 is 0.2%, 0.5%, 0.5% of the mass of AMPS respectively, while drop A liquid and B liquid into the solution of step (3) at a uniform speed;

[0015] (5) after the drop is completed, add NaOH solution to adjust the pH value in the range of 4~6, react for 3~6h under the condition of 60~70℃;

[0016] (6) extract the solution reacted in step (5) with anhydrous ethanol, repeatedly rinse the extract with deionized water, then freeze-dry to obtain the element organic polymer type high temperature resistant retarder.

[0017] Further, the vinyl silane is one or more of vinyl trimethoxysilane, vinyl triethoxysilane, vinyl tri(2-methoxyethoxy)silane, 7-octenyl trimethoxysilane, styrene ethyl trimethoxysilane.

[0018] Further, the organic acid is one or more of formic acid, acetic acid, citric acid, oxalic acid.

[0019] Further, the polymerization inhibitor is hydroquinone, 2-tert-butyl-1,4-benzoquinone, 2,6-di-tert-butylphenol, 1,1-diphenyl-2-pyrogallol hydrazine or 1,4-benzoquinone.

[0020] Further, the molar ratio of the vinyl silane, AMPS, inorganic acid is 3~6:4~7:2~5. By adjusting the ratio between the monomers in each reaction, a series of element organic polymer type high temperature resistant retarders can be synthesized.

[0021] Further, the chain transfer agent is 3-mercaptopropionic acid, isopropyl alcohol, sodium formate, 2-methyl-2-[(dodecylthiothiocarbonyl)thio]propionic acid, dithio carbamate or 2,6-di-tert-butyl-p-cresol.

[0022] Further, the application of the element organic polymer type high-temperature resistant retarder refers to application of the element organic polymer type high-temperature resistant retarder as an additive in cementing cement slurry, and the addition amount of the element organic polymer type high-temperature resistant retarder is 0.3-5.0% of the total mass of oil well cement and external admixtures.

[0023] The reaction process of the element organic polymer type high-temperature resistant retarder is as follows (taking vinyl trimethoxysilane, boric acid and AMPS as examples):

[0024]

[0025] AMPS used in the application is a commonly used monomer in synthesis of oil field chemical additives, has excellent temperature resistance, salt resistance and hydrolysis stability, and has certain retarding property for oil well cement. The silane coupling agent has a special molecular structure, has groups capable of reacting with inorganic materials and groups capable of combining with organic materials, and has good application effect on organic polymer / inorganic functional hybrid materials. In the application, inorganic retarding groups are successfully introduced into the organic AMPS polymer through polycondensation reaction between the silane coupling agent and inorganic acid. From the perspective of bond energy, the average bond energy of Si-O bond is 530.9 kJ / mol, the average bond energy of B-O bond is 515 kJ / mol, the average bond energy of P-O bond is 410 kJ / mol, and the average bond energy of C-C bond is 332 kJ / mol, so the organic hybrid polymer type retarding agent obtained in the application has better high temperature resistance than the traditional carbon chain polymer.

[0026] Compared with the prior art, the application has the following advantages:

[0027] (1) The application significantly improves the high temperature resistance of the retarding agent by introducing Si, P and B atoms, and can work stably in a high temperature environment of 120-205 DEG C, and improves the abnormal cementing phenomenon such as core packing and step formation of cement slurry caused by easy degradation of traditional organic polymer retarding agent;

[0028] (2) The application can effectively improve the fluidity of cement slurry, and avoid the low temperature thickening phenomenon of cement slurry caused by traditional organic polymer retarding agent, and ensure the safe pumping and cementing quality of cementing slurry;

[0029] (3) The phosphoric acid group and boric acid group introduced in the application have chelation and adsorption effect on Ca 2+ in the cement slurry, and the retarding property is enhanced, compared with the main adsorption group-COO - in the traditional polymer, the chelation and adsorption effect of the phosphoric acid group and boric acid group on Ca 2+ is stronger, and the decarboxylation caused by AMPS and acid monomers in the traditional polymer type retarding agent at high temperature can be avoided, which is conducive to improving the temperature resistance of the traditional AMPS based polymer retarding agent;

[0030] (4) The application combines the excellent retarding effect of phosphoric acid and boric acid retarder, avoids the problem of dosage sensitivity, has good compatibility with other additives, and can accurately control the thickening time of cement slurry. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 Thickening curve of oil well cement slurry prepared by adding the high-temperature resistant retarder of Example 1.

[0032] Fig. 2 Thickening curve of oil well cement slurry prepared by adding the high-temperature resistant retarder of Example 2.

[0033] Fig. 3 Thickening curve of oil well cement slurry prepared by adding the high-temperature resistant retarder of Example 3.

[0034] Fig. 4 Thickening curve of oil well cement slurry prepared by adding the high-temperature resistant retarder of Example 4.

[0035] Fig. 5 Thickening curve of oil well cement slurry prepared by adding the high-temperature resistant retarder of Comparative Example 1.

[0036] Fig. 6 Thickening curve of oil well cement slurry prepared by adding the high-temperature resistant retarder of Comparative Example 2. DETAILED DESCRIPTION

[0037] The application objectives, technical solutions and advantages of the application will be further illustrated below in combination with the drawings and examples. The raw materials used in the examples are commercially available, but the application embodiments are not limited thereto. Example 1

[0038] (1) 22.24 g of vinyl trimethoxysilane and deionized water were weighed, a certain amount of acetic acid was added to adjust the pH of the solution to 3.5, and the solution was stirred at a speed of 2000 r / min until it was clear, obtaining a vinyl trimethoxysilane hydrolysis solution, and then 1% of hydroquinone (based on the mass of vinyl trimethoxysilane) was added;

[0039] (2) 6.19 g of boric acid was added to a 500 mL three-necked flask equipped with a stirring device and a thermometer, heated to 70°C until completely dissolved, cooled to 50°C, and the liquid obtained in step (1) was added, and stirred at 1200 r / min for 8 h to obtain A liquid;

[0040] (3) 41.45 g of AMPS and deionized water were added to a 500 mL three-necked flask equipped with a stirring device and a thermometer, and stirring was started. After the AMPS was completely dissolved, 0.5% of H2O2 (based on the mass of AMPS) was added, and stirred for 15 min;

[0041] (4) Take 3-mercaptopropionic acid, V C and deionized water to prepare B liquid (3-mercaptopropionic acid, V C The mass of the AMPS is 0.2%, 0.5% respectively), while the liquid in (3) is added with A and B liquid at a constant speed;

[0042] (5) After the addition of A and B liquid is completed, NaOH solution is added to adjust the pH value to 5, and the reaction is stirred at 65°C and a speed of 1200 r / min for 4h;

[0043] (6) The solution after the reaction in step (5) is extracted with anhydrous ethanol, and the extract is repeatedly washed with deionized water until the filtrate is neutral. Then, it is freeze-dried and ground into powder to obtain an elemental organic polymer type high temperature resistant retarder. Example 2

[0044] (1) Take 19.03g of vinyl triethoxysilane and deionized water, add a certain amount of formic acid to adjust the solution pH to 3.2, and stir at a speed of 2000 r / min until the solution is clear. Then, 1% of 2-tert-butyl-1,4-benzoquinone (based on the mass of vinyl triethoxysilane) is added to obtain a vinyl triethoxysilane hydrolysis solution;

[0045] (2) In a 500mL three-necked flask equipped with stirring device and thermometer, 4.64g of boric acid is added, heated to 70°C until completely dissolved, cooled to 55°C, and the liquid obtained in step (1) is added. Stir at a speed of 1200 r / min for 6h to obtain A liquid;

[0046] (3) In a 500mL three-necked flask equipped with stirring device and thermometer, 25.91g of AMPS and deionized water are added, and stirring is started. After the AMPS is completely dissolved, 0.5% of H2O2 (based on the mass of AMPS) is added, and stirring is continued for 15min;

[0047] (4) Take isopropyl alcohol, V C and deionized water to prepare B liquid (isopropyl alcohol, V C The mass of the AMPS is 0.2%, 0.5% respectively), while the liquid in (3) is added with A and B liquid at a constant speed;

[0048] (5) After the addition of A and B liquid is completed, NaOH solution is added to adjust the pH value to 4.5, and the reaction is stirred at 60°C and a speed of 1200 r / min for 6h;

[0049] (6) The solution after the reaction in step (5) is extracted with anhydrous ethanol, and the extract is repeatedly washed with deionized water until the filtrate is neutral. Then, it is freeze-dried and ground into powder to obtain an elemental organic polymer type high temperature resistant retarder. Example 3

[0050] (1) Take 28.04 g of vinyl tri (2-methoxyethoxy) silane and deionized water, add a certain amount of oxalic acid to adjust the solution pH to 3.0, stir at 2000 r / min until the solution is clear, obtain the hydrolysis solution of vinyl tri (2-methoxyethoxy) silane, then add 1% of 2,6-di-tert-butyl phenol (based on the mass of vinyl tri (2-methoxyethoxy) silane) ;

[0051] (2) In a 500 mL three-necked flask equipped with stirring device and thermometer, add 7.84 g of phosphoric acid, when the temperature reaches 45℃, add the liquid obtained in step (1), stir at 1200 r / min for 7 h to obtain A liquid;

[0052] (3) In a 500 mL three-necked flask equipped with stirring device and thermometer, add 24.87 g of AMPS and deionized water, start stirring, after AMPS is fully dissolved, add 0.5% of H2O2 (based on the mass of AMPS), stir for 15 min;

[0053] (4) Take sodium formate, V C and deionized water to prepare B liquid (the mass of sodium formate, V C is 0.2%, 0.5% of the mass of AMPS respectively), at the same time, add A and B liquids to the liquid in (3) at a constant speed;

[0054] (5) After the addition of A and B liquids is completed, adjust the pH value to 5.5 by adding NaOH solution, stir at 1200 r / min at 70℃ for 3 h;

[0055] (6) Extract the solution after the reaction in step (5) with anhydrous ethanol, repeatedly rinse the extract with deionized water until the filtrate is neutral, then freeze-dry and grind the product into powder to obtain the elemental organic polymer type high temperature resistant retarder. Example 4

[0056] (1) Take 30.29 g of styrene ethyl trimethoxysilane and deionized water, add a certain amount of citric acid to adjust the solution pH to 4.0, stir at 2000 r / min until the solution is clear, obtain the hydrolysis solution of styrene ethyl trimethoxysilane, then add 1% of 1,4-benzoquinone (based on the mass of styrene ethyl trimethoxysilane) ;

[0057] (2) In a 500 mL three-necked flask equipped with stirring device and thermometer, add 7.84 g of phosphoric acid, when the temperature reaches 50℃, add the liquid obtained in step (1), stir at 1200 r / min for 8 h to obtain A liquid;

[0058] (3) In a 500ml three-necked flask equipped with a stirring device and a thermometer, 29.01g of AMPS and deionized water were added, the stirring was started, and after the AMPS was completely dissolved, 0.5% of H2O2 (based on the mass of AMPS) was added, and stirring was performed for 15 minutes;

[0059] (4) 2,6-di-tert-butyl-p-cresol, V C and deionized water were weighed to prepare B solution (2,6-di-tert-butyl-p-cresol, V C , the mass of which was 0.2% and 0.5% of the mass of AMPS, respectively), and A and B solutions were added to the liquid in (3) at a constant speed;

[0060] (5) After the addition of A and B solutions was completed, NaOH solution was added to adjust the pH value to 6.0, and stirring was performed at 65°C and a rotation speed of 1200r / min for 4h;

[0061] (6) The solution after the reaction in step (5) was extracted with anhydrous ethanol, the extract was repeatedly washed with deionized water until the filtrate was neutral, and then the product was freeze-dried and ground into powder to obtain an elemental organic polymer type high temperature resistant retarder.

[0062] II. Performance test of an elemental organic polymer type high temperature resistant retarder

[0063] Preparation of Comparative Example 1:

[0064] (1) Deionized water was used as a solvent, and 36.27g of AMPS, 13.01g of IA (itaconic acid), 7.21g of AA (acrylic acid), and 15.46g of SSS (sodium styrene sulfonate) were weighed according to a molar ratio of 7:4:4:3, and were dissolved in deionized water to obtain a mass fraction of 30%, and stirring was performed for about 15-30 minutes to completely dissolve them;

[0065] (2) The pH value was adjusted to 6.0 with NaOH solution, and was transferred to a three-necked flask equipped with a mechanical stirrer, a thermometer, and a condenser, and was heated to 60°C;

[0066] (3) 0.5% of an initiator potassium persulfate solution based on the total mass of the monomers was added to the flask at a speed of 3-4 drops per second, and constant temperature reaction was performed for 6h to obtain a liquid retarder.

[0067] Preparation of Comparative Example 2:

[0068] (1) Deionized water as solvent, according to AMPS, IA, AA, SSS molar ratio of 6:2:3:3, respectively, 41.45g AMPS, 8.67g IA, 7.21g AA, 20.62g SSS were dissolved in deionized water, the solute mass fraction was 30%, stirring for about 15-30min to make it completely dissolved;

[0069] (2) Adjusted pH value to 4.0 with NaOH solution, transferred to a three-necked flask with mechanical stirring, thermometer, condenser, heated to 65℃;

[0070] (3) 0.3% initiator potassium persulfate solution of the total mass of monomers was added to the flask at a speed of 3-4s per drop, constant temperature reaction for 4h, the liquid retarder was obtained.

[0071] The retarders of examples 1-4 and comparative examples 1-2 were added to oil well cement respectively, the basic formulation of cement slurry was: Ji Hua G-grade oil well cement + 30% quartz sand (200 mesh) + 5% microsilica + 0.5% dispersant (USZ) + 2.5% fluid loss additive (SD130) + 3.5% retarder + 2.0% suspension stabilizer (SD89) + water, wherein SD130, SD89 were provided by Sichuan Chuanqing Downhole Technology Co., Ltd., and USZ was provided by Weihui Chemical Co., Ltd. Each component was calculated as a percentage of the mass of Ji Hua G-grade oil well cement, and the water-cement ratio was 0.44. The properties of oil well cement slurry such as thickening time and fluidity were measured, and the results are shown in Table 1. The thickening time test conditions were 205℃*130MPa*120min.

[0072]

[0073] From Table 1, it can be seen that the thickening time of cement slurry of examples 1-4 at 3.5% addition meets the requirement of cementing, and there is no core package and bulging phenomenon; while the thickening time of comparative examples 1 and 2 is prolonged, and there is bulging and step phenomenon.

[0074] Figs. 1-4 are the thickening curves of cement slurry added with examples 1-4 respectively, Figs. 5-6 are the thickening curves of cement slurry added with comparative examples 1-2 respectively. As can be seen from the figure, the consistency curve of cement slurry applied with examples 1-4 is basically stable, only a small amplitude fluctuation appears within the normal range, and there is no step phenomenon, the initial consistency value is below 30Bc, and it has good right-angle thickening characteristics; while the consistency of cement slurry applied with comparative example 1 decreases obviously after 1.5h, and the temperature curve appears continuous fluctuation after entering the insulation stage, that is, the core package phenomenon; the consistency of cement slurry applied with comparative example 2 increases and then decreases between 1-1.5h, that is, the step phenomenon, which is not conducive to the development of cementing operation.

[0075] The element organic polymer type high temperature resistant retarder prepared in Example 1 was used to prepare an oil well cement slurry, and the cement slurry base formula was: Jiahua G grade oil well cement + 30% quartz sand (200 mesh) + 5% microsilica + 0.5% dispersant (USZ) + 2.5% fluid loss reducer (SD130) + 1.5% suspension stabilizer (SD89) + water, and the water-cement ratio was 0.44. By controlling the amount of the retarder, it was verified whether the cement slurry thickening time result at 120-205 DEG C met the requirements, and the result is shown in Table 2.

[0076]

[0077] As can be obviously seen from the data in Table 2, the element organic polymer type high temperature resistant retarder of Example 1 has a good amount linear relationship, and it is convenient for the construction personnel to accurately control the thickening performance of the cement slurry according to the actual needs. In the wide temperature range of 120-205 DEG C, the retarder of the application can effectively delay the thickening time of the cement slurry, so as to ensure that the cement slurry has an ideal pumpability in the whole well cementation process. It is suitable for well cementation operation of long sealing section, deep well and super deep well.

[0078] The high temperature resistant retarders of Examples 1-4 and the retarders prepared from Comparative Examples 1-2 were applied to oil well cement, and were compounded with the commercially available dispersants USZ and SXY-2, and fluid loss reducers SD130 and G33S, and the cement slurry fluidity and fluid loss amount were tested, and the additive compatibility was evaluated. The SXY-2 was provided by Chengdu Chuanfeng Chemical Engineering Co., Ltd., and the G33S was provided by Weihui Chemical Co., Ltd. The cement slurry base formula was: Jiahua G grade oil well cement + 30% quartz sand (200 mesh) + 5% microsilica + 1.0% dispersant + 5.0% fluid loss reducer + 2.0% suspension stabilizer + water, and the water-cement ratio was 0.44.

[0079]

[0080] As can be known from Table 3, the high temperature resistant retarders of Examples 1-4 have a good compatibility effect with the fluid loss reducers, and the fluid loss amount of the oil well cement slurry prepared therefrom is all below 50 mL, while the fluid loss amount of the oil well cement slurry prepared from the retarders of Comparative Examples 1 and 2 is all above 50 mL, and the compatibility effect is not good.

[0081] The above examples are only used to illustrate the technical solutions of the present application rather than limit it, and although the present application has been described in detail with reference to the preferred embodiments, the technical solutions of the present application can be modified or replaced by equivalents by those skilled in the art, and these modifications or replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A method for preparing an elemental organic polymer type high temperature resistant retarder, comprising the following steps in sequence: (1) dissolving vinyl silane in deionized water, adding organic acid to adjust the pH of the solution to 3-4, stirring until the solution is clear, obtaining a vinyl silane hydrolysis solution, and adding a polymerization inhibitor dropwise to obtain a mixed solution of the vinyl silane hydrolysis solution; (2) adding an inorganic acid solution to a three-necked flask equipped with a stirring device and a thermometer, the inorganic acid being boric acid or phosphoric acid, adding the mixed solution of the vinyl silane hydrolysis solution obtained in step (1) when the temperature is raised to 45-55℃, stirring for 6-8 h to obtain A liquid; (3) adding AMPS and deionized water to a three-necked flask equipped with a stirring device and a thermometer, starting stirring, adding H2O2 after AMPS is fully dissolved, and stirring for 15 min; (4) Chain transfer agent, V C and deionized water to obtain B liquid, while uniform speed to the solution of step (3) drop A liquid, B liquid, the molar ratio of said vinyl silane, AMPS, inorganic acid is 3~6:4~7:2~5; (5) after the dropwise addition is completed, adding NaOH solution to adjust the pH value to 4-6, and reacting at 60-70℃ for 3-6 h; (6) extracting the solution after the reaction in step (5) with anhydrous ethanol, washing the extract with deionized water, and freeze-drying to obtain an elemental organic polymer type high temperature resistant retarder.

2. The preparation method of the element-organic polymer type high-temperature retarder as described in claim 1, characterized in that, The vinyl silane is one or more of vinyl trimethoxysilane, vinyl triethoxysilane, vinyl tri(2-methoxyethoxy)silane, 7-octenyl trimethoxysilane, and styrene ethyl trimethoxysilane.

3. The preparation method of the element-organic polymer type high-temperature retarder as described in claim 1, characterized in that, The organic acid is one or more of formic acid, acetic acid, citric acid, and oxalic acid.

4. The preparation method of the element-organic polymer type high-temperature retarder as described in claim 1, characterized in that, The polymerization inhibitor is hydroquinone, 2-tert-butyl-1,4-benzoquinone, 2,6-di-tert-butylphenol, 1,1-diphenyl-2-picrylhydrazine, or 1,4-benzoquinone.

5. The preparation method of the element-organic polymer type high-temperature retarder as described in claim 4, characterized in that, The amount of the polymerization inhibitor is 1% of the mass of the vinyl silane.

6. The preparation method of the element-organic polymer type high-temperature retarder as described in claim 1, characterized in that, The chain transfer agent is 3-mercaptopropionic acid, isopropyl alcohol, sodium formate, 2-methyl-2-[(dodecylthiothiocarbonyl)thio]propionic acid, dithio carbamate, or 2,6-di-tert-butyl-p-cresol.

7. The preparation method of the element-organic polymer type high-temperature retarder as described in claim 1, characterized in that, The chain transfer agent, V C The amount of H2O2 was 0.2%, 0.5%, 0.5% of the mass of AMPS, respectively.

8. The elemental organic polymer type high temperature resistant retarder prepared by the method of any one of claims 1-7 is applied to a cement slurry for well cementing as an additive, and the amount of the elemental organic polymer type high temperature resistant retarder added is 0.3-5.0% of the total mass of the oil well cement and the admixture.

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