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Preparation method for dispersed oil well cement fluid loss additives

A technology of oil well cement and fluid loss reducer, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of affecting cementing quality and construction safety, difficult to meet design requirements, thick cement slurry, etc. The effect of controlling water loss, wide temperature adaptation range and strong dispersing ability

Inactive Publication Date: 2013-11-06
卫辉市化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, 2-acrylamido-2-methylpropanesulfonic acid (AMPS) multipolymer copolymer is used as oil well cement slurry water loss agent, which has stable performance and strong adaptability, and has been recognized by the market. However, some defects of this type of product, such as In some oil well cement slurries, the fluidity is poor, the cement slurry is too thick, and it is difficult to reach the density required by the design, which seriously affects the cementing quality and construction safety.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1, 1. first prepare initiator solution with 2.3 ㎏ ammonium persulfate and 11.4 ㎏ deionized water for subsequent use; Put calcium into the kettle; ③Put 53.6kg of soda ash into the kettle to dissolve completely; Amide 17.1kg, fumaric acid 4.6kg, N-vinylpyrrolidone 2.1kg, acrylic acid 6.8kg, isopropanol 0.9kg, sodium benzoate 0.3kg; Adjust the pH value of the feed liquid to 4.0-5.0; ⑥ Slowly add the initiator solution, stir rapidly for 2 minutes, stop stirring and wait for polymerization, and stir again when the temperature of the feed liquid rises to 77-80°C; ⑦ Keep the reaction temperature constant at 81± Continue the reaction at 2°C, and react for 120 minutes from the addition of the initiator solution; ⑧ Release the reacted material liquid, dry it with microwaves, and pulverize it. The fluid loss reducer is suitable for use in general cementing construction, has good salt resistance, can effectively control the water loss of cement slurry, and has strong di...

Embodiment 2

[0008] Example 2, ①First use 2.3kg of ammonium persulfate and 11.4kg of deionized water to prepare an initiator solution for later use; ②Put 683.9kg of deionized water into the reaction kettle, start stirring at room temperature, and 5.7kg of ultrafine Put calcium carbonate into the kettle; ③ put 53.6kg of soda ash into the kettle to dissolve completely; 17.1kg of acrylamide, 4.6kg of fumaric acid, 2.5kg of N-vinylpyrrolidone, 6.8kg of acrylic acid, 0.9kg of isopropanol, and 0.3kg of sodium benzoate; Adjust the pH value of the solution to 4.0-5.0; ⑥ Slowly add the prepared initiator solution into the reaction kettle, stir rapidly for 2 minutes, stop stirring and wait for polymerization, and stir again when the temperature of the feed liquid rises to 77-80°C; ⑦ Put Keep the reaction temperature constant at 81±2°C to continue the reaction, and react for 120 minutes from the addition of the initiator solution; ⑧Release the reacted feed liquid, dry it with microwaves, and pulveriz...

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PUM

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Abstract

A preparation method for dispersed oil well cement fluid loss additives comprises (1), preparing initiator solution with 0.21-0.25 part by weight of ammonium persulfate and 1.03-1.25 parts by weight of deionized water; (2), putting 61.57-75.25 parts by weight of deionized water into a reaction kettle and putting 0.51-0.63 part by weight of super-fine calcium carbonate into the kettle in a stirring state; (3), putting 4.82-5.90 parts by weight of sodium carbonate into the kettle and enabling the sodium carbonate to dissolve; (4), sequentially putting 17.44-21.32 parts by weight of 2-acrylamide-2-methylpro panesulfonic acid, 1.54-1.88 parts by weight of acrylamide, 1.54-1.88 parts by weight of N, N-dimethyl-acrylamid, 0.41-0.51 part by weight of fumaric acid, 0.21-0.25 part by weight of N-Vinyl-2-pyrrolidone, 0.61-0.75 part by weight of acrylic acid, 0.08-0.10 part by weight of isopropanol and 0.02-0.03 part by weight of sodium benzoate into the kettle; (5), enabling the temperature of the material liquid to rise to 58-60 DEG C and utilizing sodium carbonate to adjust PH value to 4.0-5.0; (6), adding the initiator solution into the kettle, rapidly stirring the initiator solution and the material liquid for 2 minutes and waiting for polymerization, and stirring the initiator solution and the material liquid when the temperature is observed to rise to 77-80 DEG C; (7), continuing reaction at a temperature of 81+ / -2 DEG C; (8), simply discharging the material liquid for microwave drying and crushing. The products prepared by the preparation method for the dispersed oil well cement fluid loss additives are wide in temperature adaptation range and good in salt-resistant performance.

Description

[0001] Technical field: [0002] The invention relates to a method for preparing an oil well cement fluid loss reducing agent which is suitable for drilling operations and can significantly improve the rheological properties of cement slurry without affecting the fluid loss reducing performance of the product. Background technique: [0003] At present, 2-acrylamido-2-methylpropanesulfonic acid (AMPS) multipolymer copolymer is used as oil well cement slurry water loss agent, which has stable performance and strong adaptability, and has been recognized by the market. However, some defects of this type of product, such as In some oil well cement slurries, the fluidity is poor, the cement slurry is too thick, and it is difficult to reach the density required by the design, which seriously affects the cementing quality and construction safety. Invention content: [0004] The purpose of the present invention is to provide a preparation method of an oil well cement fluid loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/56C08F220/54C08F222/02C08F220/06C08F226/10C09K8/487
Inventor 梁艳丽耿强靳建忠李新芬赵元伟周嘉龙王爱民
Owner 卫辉市化工有限公司
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