Defoaming agent for water-based drilling fluid and preparation method thereof

A technology of water-based drilling fluid and defoamer, which can be applied in chemical instruments and methods, drilling compositions, etc., and can solve problems such as large dosage

Inactive Publication Date: 2013-05-01
SICHUAN RENZHI PETROCHEMICAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, defoamers that meet these conditions at the same time are still rare, especially the problem of large dosage

Method used

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  • Defoaming agent for water-based drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In this example, we use the following preparation methods:

[0025] Add 1500kg of diesel oil to the reactor with stirring device and temperature control device, start stirring, add 140kg of aluminum distearate when the temperature rises to 60°C, thicken in 10-20min, add 380kg of oleic acid immediately, and add 130kg of phosphoric acid after reacting for 10min Tributyl ester, 130kg of isooctyl alcohol was added after 30min, and the reaction was continued for 1h to discharge. During this period, the temperature is maintained at 60°C-65°C.

Embodiment 2

[0027] In this example, we use the following preparation methods:

[0028] Add 1500kg of aviation kerosene to the kettle with stirring device and temperature control device, start stirring, add 180kg of aluminum stearate when the temperature rises to 60°C, thicken in 10-20min, add 380kg of oleic acid immediately, and add 110kg of phosphoric acid after reacting for 10min Tributyl ester, 110kg of isooctyl alcohol was added after 30min, and the reaction was continued for 1h to discharge. During this period, the temperature is maintained at 65°C-70°C.

Embodiment 3

[0030] In this example, we use the following preparation methods:

[0031] Add 1500kg of aviation kerosene to the reaction kettle with stirring device and temperature control device, start stirring, raise the temperature to 60°C, add 160kg of aluminum distearate, thicken in 10-20min, add 380kg of isobutyl oleate immediately, and react for 10min Finally, 120kg of tributyl phosphate was added, 120kg of isooctyl alcohol was added after 30 minutes, and the reaction was continued for 1 hour to discharge. During this period, the temperature is maintained at 70°C-75°C.

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Abstract

The invention relates to a defoaming agent for a water-based drilling fluid and a preparation method thereof. Selected solvent oil, stearic acid, oleic acid, isooctyl alcohol and tributyl phosphate are compounded. The solvent oil is heated to swell aluminum distearate, so as to facilitate compound with other components to play synergistic effect. The method for producing the defoaming agent has simple preparation process; the defoaming agent displays excellent defoaming effect with a small amount; and the product has lubrication action.

Description

technical field [0001] The invention relates to a defoamer, in particular to a defoamer for water-based drilling fluid and a preparation method thereof. Background technique [0002] In the process of oil and gas exploration and development, the mud system is continuously developed and updated with the development of drilling technology. Among the many mud treatment agents, some have foaming properties, such as iron chromium lignosulfonate, sulfonated lignite, sodium alkylsulfonate, polyacrylamide salt, etc., when added to water-based mud, Under gas and mechanical agitation, a large number of air bubbles will be generated in the mud, resulting in a decrease in the density of the mud, poor lubricating performance, a decrease in the efficiency of cooling the drill bit, and certain difficulties in the circulation of the mud. Therefore, mud foaming has become a problem that cannot be ignored in the drilling process. In order to solve the problem of mud foaming, a more common, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
Inventor 张军张龙军彭波喻小菲杨松吕宝
Owner SICHUAN RENZHI PETROCHEMICAL TECHNOLOGY CO LTD
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