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A kind of organic antifriction agent for drilling fluid and preparation method thereof

A friction reducing agent and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as difficulty in completion operations, affecting wellbore integrity, scrapping of oil and gas well sections or entire wells, etc. , to achieve better lubrication and drag reduction effect, no obvious viscosity effect, and convenient on-site use.

Active Publication Date: 2019-01-29
成都西油华巍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the drilling of extended-reach wells, highly deviated wells, horizontal wells, and deep wells with large curvature changes, serious casing wear and early damage often occur, which brings great difficulties to normal drilling and completion operations and affects wellbore integrity. Sexuality, reducing the life of oil and gas wells, and even causing part of the oil and gas well or the entire well to be scrapped
To reduce casing wear during drilling, drill pipe joint wear-resistant bands, integral protection subs and split rotary protection subs are usually used to alleviate casing wear, but these protective measures are costly and complicated to operate, and cannot completely avoid casing wear , if used improperly, it will even aggravate casing wear

Method used

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  • A kind of organic antifriction agent for drilling fluid and preparation method thereof
  • A kind of organic antifriction agent for drilling fluid and preparation method thereof
  • A kind of organic antifriction agent for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: Take 100% according to the sum of the mass of each component: 55 parts of molybdenum alkyl salicylate, 25 parts of kerosene, 8 parts of sodium dodecylbenzenesulfonate, 12 parts of isobutylene sulfide; sequentially add to the reaction kettle , The reaction was carried out at 60° C. for 4 h to obtain a yellow liquid.

Embodiment 2

[0015] Embodiment two: will take according to the mass sum of each component 100%: 45 parts of molybdenum dialkyldithiophosphate, 35 parts of diesel oil, 5 parts of calcium dodecylbenzenesulfonate, 15 parts of triethyl phosphate; They were sequentially added to the reaction kettle, and reacted at 50°C for 4h to obtain a brown liquid.

Embodiment 3

[0016] Embodiment three: will be taken according to 100% of the mass sum of each component: 62 parts of molybdenum naphthenate, 23 parts of white oil, 5 parts of sulfated castor oil, 10 parts of tributyl phosphate; Add in the reaction kettle successively, at 60 The reaction was carried out at ℃ for 5h to obtain a yellow liquid.

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Abstract

Organic antifriction composition for drilling fluid is composed of, prepared in 100%, 45-65 parts of organic acidic metal salt, 15-35 parts of mineral oil, 5-10 parts of emulgator, and 8-15 parts of extreme-pressure additive. During preparation, the components are proportionally added into a reactor and react for 4-6 hours at 50-90oC, producing yellow or brown liquid which is antifriction composition. The antifriction composition can form a high-intensity extreme-pressure lubricating film to be antifriction through its organic negative ions adsorbing to the surface of a casing or a drilling rod, and can replace or partially replace lubricant, using cost of lubricant is reduced, and the antifriction composition is applicable to highly-deviated wells, horizontal wells, high-density drilling fluid and long-cycle prospecting wells.

Description

technical field [0001] The invention relates to the field of oil and gas well exploitation, in particular to an organic friction reducer for drilling fluid and a preparation method thereof. Background technique [0002] During the drilling of extended-reach wells, highly deviated wells, horizontal wells, and deep wells with large curvature changes, serious casing wear and early damage often occur, which brings great difficulties to normal drilling and completion operations and affects wellbore integrity. Sexuality, reducing the life of oil and gas wells, and even causing part of the oil and gas well or the entire well to be scrapped in severe cases. To reduce casing wear during drilling, drill pipe joint wear-resistant bands, integral protection subs and split rotary protection subs are usually used to alleviate casing wear, but these protective measures are costly and complicated to operate, and cannot completely avoid casing wear , if used improperly, it will even aggrava...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/22C09K8/24
CPCC09K8/035C09K8/22C09K8/24C09K2208/28C09K2208/34
Inventor 宋芳
Owner 成都西油华巍科技有限公司
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