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High-dropping-point extreme-pressure drilling tool thread grease

A thread grease and high drop point technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of inability to inhibit oxidation and neutralize free acid bodies, large evaporation loss of drill thread grease, lack of protection for oil and soap separation threads, etc. problems, to achieve the effect of inhibiting the occurrence of oxidation, the effect of antirust is remarkable, and the effect of enhancing the anti-water splashing performance

Inactive Publication Date: 2020-04-24
融润化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the drilling process of oil, natural gas and shale gas, a special lubricating grease must be applied to the threaded joints of drilling tools. With the rapid development of drilling technologies such as oil, natural gas and shale gas, the performance of drilling tool thread grease The requirements mentioned a higher level to ensure that the lubrication and protection performance of the threaded parts are met during the drilling process, ensuring sufficient lubricity, extreme pressure wear resistance, water resistance and oxygen resistance during the drilling process , to ensure that when drilling under high pressure, it will not be stabbed due to poor protection performance, to ensure the needs of normal drilling, and to prolong its service life. At present, the dropping point of thread grease commonly used in the domestic market is generally low. Some drilling tool thread grease can be used at the depth of less than 4000 meters at most, and it is not suitable for drilling above 4000 meters. Otherwise, due to the lack of protection of the oil-soap separation thread, accidents are prone to occur when the drill is pulled out, and the existing drilling tool thread compound is lost due to evaporation. Large amount, the integrity of the oil film during operation is reduced, and accidents are prone to occur in long-term operation. Since the drilling tool thread grease is mostly neutral, it cannot inhibit oxidation and neutralize free acidic bodies, and has no free alkali index, so it is not resistant to pressure or resistance grind

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of high dropping point extreme pressure drilling tool thread grease, the weight percent of each component in the high dropping point extreme pressure drilling tool thread grease is as follows: octadecylamine 7.8%, ethylenediamine 3%, diisocyanate 15%, hydrogenation ring 14% alkane base oil, 20% hydrogenated paraffin base oil, 5.3% benzotriazole fatty acid amine salt, 8% diisooctyl diphenylamine, 12.9% calcium sulfonate, 14% micronized phosphorus flake graphite, calcium sulfonate is a A medium base number synthetic calcium sulfonate, in which octadecylamine, ethylenediamine and diisocyanate are used as thickeners, hydrogenated naphthenic base oil and hydrogenated paraffin base oil are used as diluents, and benzotriazole fatty acid amine salt is used as oily Diisooctyl diphenylamine is used as an anti-oxidant and antiseptic, calcium sulfonate is used as an alkali adjustment and antirust agent, and micronized phosphorus flake graphite is used as an anti-pressure, wea...

Embodiment 2

[0025] A high dropping point extreme pressure drilling tool thread grease, the weight percentage of each component in the high dropping point extreme pressure drilling tool thread grease is as follows: octadecylamine 11%, ethylenediamine 5%, diisocyanate 12%, hydrogenation ring 16% paraffin base oil, 17% hydrogenated paraffin base oil, 6% benzotriazole fatty acid amine salt, 6% diisooctyl diphenylamine, 15% calcium sulfonate, 12% micronized phosphorus flake graphite, calcium sulfonate is a A medium base number synthetic calcium sulfonate.

[0026] The present invention also provides a preparation method of high dropping point extreme pressure drilling tool thread grease: comprising the following steps:

[0027] S1): Mix diisocyanate with partially hydrogenated naphthenic base oil and hydrogenated paraffinic base oil, stir at 70°C, and slowly add octadecylamine and ethylenediamine dissolved in the solvent to react. After the reaction Distill off residual solvent at 150°C;

[...

Embodiment 3

[0031] A kind of high dropping point extreme pressure drilling tool thread grease, the weight percentage of each component in the high dropping point extreme pressure drilling tool thread grease is as follows: octadecylamine 7%, ethylenediamine 2%, diisocyanate 13.5%, hydrogenation ring 12% alkane base oil, 24% hydrogenated paraffin base oil, 5.5% benzotriazole fatty acid amine salt, 9% diisooctyl diphenylamine, 11% calcium sulfonate, 16% micronized phosphorus flake graphite, calcium sulfonate is a A medium base number synthetic calcium sulfonate.

[0032] The present invention also provides a preparation method of high dropping point extreme pressure drilling tool thread grease: comprising the following steps:

[0033] S1): Mix diisocyanate with partially hydrogenated naphthenic base oil and hydrogenated paraffinic base oil, stir at 80°C, and slowly add octadecylamine and ethylenediamine dissolved in the solvent to react. After the reaction Distill off residual solvent at 15...

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Abstract

The invention provides high-dropping-point extreme pressure drilling tool thread grease. The high-dropping-point extreme-pressure drilling tool thread grease comprises the following components in percentage by weight: 7-11% of octadecylamine, 2-5% of ethylenediamine, 12-15% of diisocyanate, 12-16% of hydrogenated naphthenic base oil, 17-24% of hydrogenated paraffin base oil, 5.3-6% of benzotriazole fatty acid amine salt, 6-9% of diisooctyl diphenylamine, 11-15% of calcium sulfonate and 12-16% of micro-powder flake graphite. The invention further provides a preparation method of the high-dropping-point extreme-pressure drilling tool thread grease. The preparation method comprises the following steps: S1) mixing diisocyanate with part of hydrogenated naphthenic base oil and hydrogenated paraffin base oil, stirring at the temperature of 60-80 DEG C, slowly adding octadecylamine and ethylenediamine dissolved in a solvent, carrying out a reaction, and evaporating out a residual solvent at the temperature of 150 DEG C after the reaction. According to the high-dropping-point extreme-pressure drilling tool thread grease provided by the invention, the dropping point, the anti-oxidation stability, the wear resistance, the corrosion resistance and the rust resistance of the drilling tool thread grease are improved, and it is guaranteed that accidents are not likely to happen when a drilling tool drills at high temperature.

Description

technical field [0001] The invention relates to the technical field of lubricating materials, in particular to a high dropping point extreme pressure drilling tool thread grease. Background technique [0002] During the drilling process of oil, natural gas and shale gas, a special lubricating grease must be applied to the threaded joints of drilling tools. With the rapid development of drilling technologies such as oil, natural gas and shale gas, the performance of drilling tool thread grease The requirements mentioned a higher level to ensure that the lubrication and protection performance of the threaded parts are met during the drilling process, ensuring sufficient lubricity, extreme pressure wear resistance, water resistance and oxygen resistance during the drilling process , to ensure that when drilling under high pressure, it will not be stabbed due to poor protection performance, to ensure the needs of normal drilling, and to prolong its service life. At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/06C10N30/10C10N30/12C10N50/10
CPCC10M169/00C10M2201/041C10M2203/04C10M2203/045C10M2205/163C10M2215/04C10M2215/064C10M2215/14C10M2215/223C10M2219/044
Inventor 郑奋勇
Owner 融润化工科技有限公司
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