Oil-based lubricating anti-seize agent used in well drilling, and preparation method and applications thereof

An anti-sticking agent and lubricant technology, applied in the field of oil drilling, can solve the problems of low lubricating performance of the sticking-releasing agent, poor effect of removing the sticking agent, easy to drill again, etc., so as to improve lubricity, reduce logging interference, reduce The effect of sticking risk

Inactive Publication Date: 2018-01-26
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing jam release agent, under the action of the penetrating agent, the base oil can enter between the mud cake and the drilling tool to realize the jam release, but due to the low lubricating performance of this jam release agent, it is easy to Drillable again, resulting in low jam release efficiency
In addition, the use of barite for weighting puts forward higher requirements on the rheology of the drilling fluid, while the use of water-based jam release fluid has poor results in the release of stuck drill in shale formations

Method used

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  • Oil-based lubricating anti-seize agent used in well drilling, and preparation method and applications thereof
  • Oil-based lubricating anti-seize agent used in well drilling, and preparation method and applications thereof
  • Oil-based lubricating anti-seize agent used in well drilling, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Mix castor oil, concentrated sulfuric acid and diethanolamine according to the weight ratio of 60:1:3, and the reaction temperature is controlled at 110°C. After reacting for 3 hours, continue to add fatty acid methyl ester and nitric acid with a weight ratio of 60:5, The reaction temperature was controlled at 100° C., and after 2 hours of reaction, it was cooled to room temperature to obtain a liquid lubricant.

[0028] Step 2: Dissolve 10 parts of low-fluorescent sulfonated asphalt in 80 parts of castor oil at room temperature. After fully stirring, add 12 parts of lubricant prepared in step 1, 2 parts of accelerator, polyoxyethylene alkyl ether phosphate After fully dissolving, add 10 parts of sodium succinate and 3 parts of ZnO nanoparticles in sequence, continue stirring, and finally add 4 parts of formate, stir and stand to obtain a stable system.

Embodiment 2

[0030] Step 1: palm oil, concentrated sulfuric acid and diethanolamine are mixed according to the weight ratio of 80:6:5, and the reaction temperature is controlled at 130°C. After reacting for 4 hours, continue to add fatty acid methyl ester and nitric acid with a weight ratio of 100:10, The reaction temperature was controlled at 110° C., and after 2 hours of reaction, it was cooled to room temperature to obtain a liquid lubricant.

[0031] Step 2: Dissolve 15 parts of low-fluorescent sulfonated asphalt in 90 parts of palm oil at room temperature, and after fully stirring, add 14 parts of lubricant prepared in step 1, 3 parts of accelerator, polyoxypropylene alkyl ether phosphate 4 parts, after fully dissolving, add 15 parts of sodium succinate, LiTaO 3 5 parts of nanoparticles, continue to stir, and finally add 4 parts of formate, stir and stand to obtain a stable system.

Embodiment 3

[0033] Step 1: Mix soybean oil, concentrated sulfuric acid and diethanolamine according to the weight ratio of 90:11:10, and control the reaction temperature at 140°C. After reacting for 5 hours, continue to add fatty acid methyl ester and nitric acid with a weight ratio of 160:20, and react The temperature was controlled at 120° C., and after reacting for 3 hours, it was cooled to room temperature to obtain a liquid lubricant.

[0034] Step 2: Dissolve 20 parts of low-fluorescence sulfonated asphalt in 100 parts of soybean oil at room temperature, and after fully stirring, add 15 parts of lubricant prepared in step 1, 4 parts of accelerator, and 5 parts of polyoxyethylene alkyl ether phosphate After fully dissolving, add 20 parts of sodium succinate, KNbO 3 6 parts of nanoparticles, continue to stir, and finally add 5 parts of formate, stir and stand to obtain a stable system.

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Abstract

The invention relates to an oil-based lubricating anti-seize agent used in well drilling, and a preparation method and applications thereof. The oil-based lubricating anti-seize agent used in well drilling is prepared from 80 to 100 parts of a base oil, 10 to 20 parts of low fluorescence sulfonated bitumen, 10 to 20 parts of sodium succinate, 10 to 15 parts of a lubricant, 3 to 5 parts of a wetting dispersant, 2 to 4 parts of a promoter, 3 to 6 parts of nanoparticles, and 4 to 6 parts of a formate via mixing and stirring at a certain sequence. Compared with conventional products, the oil-basedlubricating anti-seize agent possesses following advantages: the stability is high, the lubricating performance is excellent, seizing resolving speed is high, preparation is convenient, the oil-basedlubricating anti-seize agent is more suitable for anti-seize and seizing resolving under high temperature stratum, and is convenient for on-site construction.

Description

technical field [0001] The invention relates to an oil-based lubricating anti-seize agent, in particular to the application of the oil-based lubricating anti-seize agent in shale oil and gas drilling, and belongs to the technical field of petroleum drilling. Background technique [0002] In drilling practice, pipe sticking accidents are often caused by factors such as changes in well structure, changes in mud properties, and formation characteristics. Especially in shale oil and gas drilling, water-sensitive shale formations are often encountered when using air-mist drilling or foam drilling, and shale cuttings are easily bonded into agglomerates, resulting in pipe sticking. [0003] After the stuck pipe occurs, chemical treatment methods can generally be used to release the stuck pipe: one is to use clean water, glue or low-density drilling fluid to flush the stuck point. The second is soaking acid, which is generally suitable for carbonate formations, and the formations a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/24
Inventor 黄何鑫孙卫张荣辉屈怡倩杜堃白云云吴彦君韩进刘登科
Owner NORTHWEST UNIV(CN)
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