Temperature resistance and salt tolerance extreme pressure lubricant for high density drilling fluid and preparation method thereof

A technology of extreme pressure lubricants and drilling fluids, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems that do not involve temperature resistance and adhesion coefficient reduction, and achieve excellent temperature and salt resistance, Reduced friction coefficient and strong hydrolytic stability

Active Publication Date: 2019-03-08
山东得顺源石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN101486896 discloses a lubricant used in high-density drilling fluid, with a density of 2.4g / cm 3 In high-density pulp, after aging at 150°C, the reduction rate of its adhesion coefficient is 50%, and the reduction rate of friction coefficient is 35%, but it does not involve the temperature resistance in high-density saturated salt.

Method used

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  • Temperature resistance and salt tolerance extreme pressure lubricant for high density drilling fluid and preparation method thereof
  • Temperature resistance and salt tolerance extreme pressure lubricant for high density drilling fluid and preparation method thereof
  • Temperature resistance and salt tolerance extreme pressure lubricant for high density drilling fluid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] While stirring, add 80 parts of sulfonated methyl oleate into the reaction kettle, heat up to 50 °C, add 6 parts of oleic acid and stir for 30 min, then heat up to 95 °C, then add 6 parts of sulfurized fatty acid methyl ester and 2 One part of methylene bis-dibutyl dithiocarbamate was stirred for 20 min, and finally 3 parts of emulsifier were added (the emulsifier was a mixture of nonionic surfactants OP-10 and SP-80, and the mass mixing ratio was OP- 10: SP-80=2:3) and 3 parts of silicone defoamer cooled to room temperature while stirring, the resulting black red liquid is non-fluorescence anti-temperature and anti-salt extreme pressure lubricant for high-density drilling fluid.

Embodiment 2

[0042] While stirring, add 82 parts of sulfonated methyl oleate into the reaction kettle, heat up to 60 °C, add 5 parts of oleic acid and stir for 30 min, then heat up to 100 °C, then add 5 parts of sulfurized fatty acid methyl ester and 3 One part of methylene bis-dibutyl dithiocarbamate was stirred for 20 min, and finally 3 parts of emulsifier were added (the emulsifier was a mixture of nonionic surfactants OP-10 and SP-80, and the mass mixing ratio was OP- 10: SP-80=2:3) and 2 parts of silicone defoamer cooled to room temperature while stirring, the resulting black-red liquid is non-fluorescence anti-temperature and anti-salt extreme pressure lubricant for high-density drilling fluid.

Embodiment 3

[0044] While stirring, add 82 parts of sulfonated methyl oleate into the reaction kettle, heat up to 95 °C, add 5 parts of oleic acid and stir for 30 min, then heat up to 100 °C, add 5 parts of sulfurized fatty acid methyl ester and 3 parts Methylene bis-dibutyl dithiocarbamate was stirred for 20 min, and 3 parts of emulsifier were added (the emulsifier was a mixture of nonionic surfactants OP-10 and SP-80, and the mass mixing ratio was OP-10: SP-80=2:3) and 2 parts of silicone defoamer cooled to room temperature while stirring, the resulting black red liquid is non-fluorescent anti-temperature and anti-salt extreme pressure lubricant for high-density drilling fluid.

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Abstract

The invention discloses a temperature resistance and salt tolerance extreme pressure lubricant for a high density drilling fluid and a preparation method thereof, and belongs to the field of additivesfor oil drilling operation. In order to solve the problem that a lubricant is not ideal in lubrication effect under conditions of high density slurry, high temperature and high salt, the method comprises the following steps: performing stirring reaction on ester base oil and long-chain fatty acid for 30min at 50 to 95 DEG C, then adding an extreme pressure additive and a friction pair surface modifier for performing reaction for 20min at 95 to 100 DEG C, finally adding an emulgator and a defoamer, and cooling down the material to a room temperature while stirring is performed, so as to form the extreme pressure lubricant for high density drilling fluid, with excellent lubrication effect in high-temperature and saturated salt conditions. Compared with the prior art, the method has the advantages that the reduction rate of the extreme pressure lubrication coefficient of the lubricant is greater than 80 percent after the lubricant is aged at 180 DEG C in high density slurry with the density being 2.0g / cm3, and the reduction rate of the extreme pressure lubrication coefficient of the lubricant is greater than 80 percent after the lubricant is aged at 150 DEG C in saturated brine slurry with the density being 2.0g / cm3, and the lubricant has the characteristics of low viscosity increasing and low foaming ratio, and can be applied to drilling operation for deep wells, ultra-deep wells, horizontal wells and highly-deviated wells.

Description

technical field [0001] The invention relates to the field of additives for oil drilling operations, in particular to a temperature-resistant and salt-resistant extreme-pressure lubricant for high-density drilling fluid and a preparation method thereof. Background technique [0002] With the continuous development of wells with special conditions such as deep wells and ultra-deep wells, the drilling of ultra-high temperature and ultra-high pressure formations has also increased. In order to ensure smooth drilling and production, such wells generally use high-density drilling fluid. The increase in mud density leads to a significant increase in torque resistance and friction resistance, and sticking accidents are prone to occur. Adding an appropriate amount of lubricant to drilling fluid is a common method to improve the lubrication performance of drilling fluid. [0003] At present, conventional lubricants have obvious lubricating effects in low-density drilling fluids, but ...

Claims

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Application Information

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IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 郭东荣王树永王美云
Owner 山东得顺源石油科技有限公司
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