A kind of oil well cement retarder and preparation method thereof

A technology of oil well cement and retarder, which is applied in the field of oil and gas well cementing, can solve the problems of poor temperature resistance and high temperature sensitivity, and achieve the effects of good adaptability, good compatibility, and good linearity of addition

Active Publication Date: 2018-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The retarder is a liquid with poor temperature resistance and great sensitivity to temperature

Method used

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  • A kind of oil well cement retarder and preparation method thereof
  • A kind of oil well cement retarder and preparation method thereof
  • A kind of oil well cement retarder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 100 parts of water, 2 parts of sodium glucoheptonate dihydrate, 13 parts of platycodon polysaccharide, 0.2 part of glutaraldehyde, 1 part of concentrated hydrochloric acid, 5 parts of polyethylene glycol were added to the water, and heated to 80 °C under stirring, keeping After 2 hours, the oil well cement retarder was prepared.

Embodiment 2

[0028] 100 parts of water, 2 parts of sodium glucoheptonate dihydrate, 3 parts of sodium gluconate, 6 parts of white dextrin, 4 parts of yellow dextrin, 0.3 parts of glutaraldehyde, 3 parts of concentrated hydrochloric acid, polyethylene glycol 2 parts were heated to 70°C under stirring and kept for 2 hours to prepare oil well cement retarder.

Embodiment 3

[0030] 100 parts of water, 1 part of sodium glucoheptonate dihydrate, 15 parts of inulin, 0.1 part of glutaraldehyde, 2 parts of concentrated hydrochloric acid, 1 part of polyethylene glycol were added to the water, heated to 80 ° C under stirring, and kept After 1 hour, the oil well cement retarder was prepared.

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Abstract

The invention discloses an oil well cement retarder and a preparation method thereof. The retarder includes the following components in parts by weight: 100 parts by weight of water; 1-5 parts by weight of hydroxycarboxylate; 10-15 parts by weight of polysaccharide; 0.1-0.3 parts by weight of glutaraldehyde; ~3 parts by weight; 1~5 parts by weight of polyethylene glycol; the hydroxycarboxylate is selected from one or a combination of sodium gluconate, sodium glucoheptonate dihydrate, and sodium citrate; From bellflower polysaccharide, white dextrin, yellow dextrin or inulin. The method comprises: the components are heated to 70-80° C. in a stirring state according to the stated dosage, and kept for 1-2 hours to obtain the oil well cement retarder. The retarder of the present invention has a wide applicable temperature range, The application temperature range is 70°C to 160°C; when the retarder meets the temperature difference of 60°C, the 24-hour top strength of the cement stone is >10MPa, which has no effect on the comprehensive performance of the cement slurry.

Description

technical field [0001] The invention relates to the field of oil and gas well cementing, and more particularly relates to an oil well cement retarder and a preparation method thereof. Background technique [0002] Oil well cement retarder is an admixture of oil well cement, usually used in the cement slurry used in oil and gas well cementing operations. In the cementing operation of oil and gas wells, the cement slurry is pumped into the well through the pumping of the cement truck, and the cement slurry is replaced into the annular space between the casing and the wellbore through the process of replacing the slurry, so as to isolate the oil, gas and water layers The purpose of protecting the production layer and supporting the protective casing. [0003] The thickening time of the grout is roughly the time that the grout remains in a liquid, pumpable state. As the hydration reaction in cement proceeds, when it reaches a certain level, the cement slurry will lose its flui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467
Inventor 刘学鹏张明昌张林海杨龙杰方春飞黄金营穆海朋刘伟周仕明
Owner CHINA PETROLEUM & CHEM CORP
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