CN114561198A - Organic modifier, solid lubricant, preparation method and application - Google Patents
Organic modifier, solid lubricant, preparation method and application Download PDFInfo
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Abstract
The invention provides an organic modifier, a solid lubricant, a preparation method and application thereof. The organic modifier comprises 75-90% of fatty acid low-carbon alcohol ester by taking the total mass of the organic modifier as 100%; 5 to 20 percent of alkylphenol; 0.5 to 2 percent of film forming stabilizer; 0.5 to 1 percent of dissolution promoter; 1-8% of fatty acid. The organic modifier disclosed by the invention has the advantages of good spreading and adhesion on the surface of inorganic powder, green and environment-friendly raw materials, simplicity in operation, mild reaction conditions, high safety, short modification time of the inorganic powder, good modification effect, stable quality of the prepared solid lubricant, good resistance reduction effect, high and low temperature resistance, capability of being used for drilling of a horizontal well with high difficulty and great application value.
Description
Technical Field
The invention belongs to the technical field of solid lubricants, and particularly relates to an organic modifier, a solid lubricant, a preparation method and an application.
Background
Along with the continuous enhancement of drilling force of drilling at present, drilling friction drag is too big to lead to the fact downhole drilling sticking phenomenon frequently, and drilling tool wearing and tearing aggravation need add emollient in the drilling fluid in order to reduce downhole friction drag. In the past, drilling fluid lubricants were selected to meet drilling requirements, cost issues, and environmental and hydrocarbon reservoir protection concerns were considered. With the increasing emphasis on ecological environment protection, the problems of environmental protection and hydrocarbon reservoir protection are the primary concern in the current research and development and use of lubricants. The traditional drilling fluid lubricant has to be improved in resistance reduction performance and serious pollution to stratum, and can not meet the requirements of drilling construction.
The lubricant in the drilling industry mainly comprises mineral oil, vegetable oil and modified products of oil foot thereof, a mixture of a surfactant and organic matters, fine chemical products such as synthetic lipids and the like, and a solid lubricant. The solid lubricant can be used in high-temperature and high-pressure environments and is necessary in drilling with high-temperature performance requirements.
Disclosure of Invention
The invention aims to provide an environment-friendly organic modifier and a solid lubricant with excellent performance.
In order to achieve the purpose, the invention adopts the technical scheme that:
an organic modifier, which is characterized in that the components of the organic modifier comprise, based on 100% of the total mass of the organic modifier:
preferably, the components of the organic modifier comprise, based on 100% of the total mass of the organic modifier:
preferably, the fatty acid low carbon alcohol ester is an esterification product of C8-C22 fatty acid and C1-C3 low carbon alcohol.
Further preferably, the lower alcohol is one or more of methanol, ethanol or isopropanol.
More preferably, the fatty acid lower alcohol ester is prepared by carrying out esterification and transesterification on animal and vegetable oil, fatty acid or acidified oil and methanol.
Further preferably, the fatty acid lower alcohol ester is one or more of fatty acid methyl ester, fatty acid ethyl ester or fatty acid isopropyl ester with the carbon chain length of 8-22.
Still further preferably, the fatty acid lower alcohol ester is one or more of fatty acid methyl ester, fatty acid ethyl ester or fatty acid isopropyl ester with a carbon chain length of 8-18.
According to some embodiments, the fatty acid lower alcohol ester is a fatty acid methyl ester having a carbon chain length of 8 to 18.
Preferably, the alkylphenol is one or more of linear carbon chain alkylphenols of C9-C16. For example, the alkyl group on the alkylphenol is a straight-chain alkyl group having a chain length of 9, 10, 12, 14, 15, or 16 carbon atoms.
Further preferably, the alkyl group and the hydroxyl group in the alkylphenol are meta-or para-relative to each other.
According to some embodiments, the alkylphenol is one or more of nonylphenol, p-dodecylphenol, p-tetradecylphenol, p-hexadecylphenol, and m-pentadecylphenol.
Preferably, the film forming stabilizer is one or more of zinc stearate, magnesium stearate or calcium stearate.
Preferably, the cosolvent is hexylene glycol butyl ether acetate and/or phenethyl phenol polyoxyethylene ether.
Preferably, the fatty acid is a straight chain fatty acid.
Preferably, the fatty acid is one or more of fatty acids with carbon chain lengths of 8-18. For example, the carbon chain length of the fatty acid is 8, 10, 12, 14, 16 or 18 carbon atoms.
According to some embodiments, the fatty acid is one or more of caprylic acid, pelargonic acid, caprylic/capric acid, oleic acid or linoleic acid.
Preferably, the preparation method of the organic modifier comprises the following steps:
1) stirring and mixing alkylphenol, a film forming stabilizer and a dissolution promoter to obtain a primary mixture;
2) stirring and mixing the primary mixture and fatty acid to obtain a secondary mixture;
3) and stirring and mixing the secondary mixture and the fatty acid low-carbon alcohol ester to obtain the organic modifier.
Specifically, the stirring and mixing temperature in step 1) is 100 to 140 ℃, for example, 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 135 ℃ and 140 ℃.
Specifically, the stirring and mixing temperature in the step 2) is 40 to 70 ℃, for example, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃, 65 ℃ and 70 ℃.
Specifically, the stirring and mixing temperature in the step 3) is room temperature, and the room temperature is 20-40 ℃.
Specifically, the stirring speed in the step 1), the step 2) and the step 3) is respectively and independently 60-100 r/min. For example, 60r/min, 65r/min, 70r/min, 75r/min, 80r/min, 85r/min, 90r/min, 95r/min, 100 r/min.
The invention also provides a solid lubricant, which comprises inorganic powder and the organic modifier coated on the surface of the inorganic powder.
Preferably, the inorganic powder is 325-1000 mesh graphite powder. For example, the particle size of the graphite powder is 325 mesh, 350 mesh, 400 mesh, 500 mesh, 600 mesh, 800 mesh, or 1000 mesh.
Preferably, the weight ratio of the inorganic powder to the organic modifier is (10-15): 100, e.g., 10:100, 11:100, 12:100, 13:100, 14:100, or 15: 100.
The invention also provides a preparation method of the solid lubricant, which mixes the organic modifier with the organic powder in a spraying manner and modifies the surface of the organic powder to obtain the solid lubricant.
Preferably, the modification temperature is 60-80 ℃, such as 60 ℃, 65 ℃, 70 ℃, 75 ℃ or 80 ℃.
Preferably, the modification is carried out at a stirring speed of 600-800 r/min, such as 600r/min, 650r/min, 700r/min, 750r/min and 800 r/min.
Preferably, the modification reaction time is 30-60 min, such as 30min, 35min, 40min, 45min, 50min, 55min or 60 min.
The invention also provides the application of the solid lubricant in well drilling.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, the organic modifier obtained by compounding the fatty acid low-carbon alcohol ester, the alkylphenol, the film forming stabilizer, the dissolution accelerator and the fatty acid and combining the improvement of the preparation process has the advantages of good spreading and adhesion on the surface of inorganic powder, green and environment-friendly raw materials, simple operation, mild reaction conditions and high safety. Furthermore, the organic modifier provided by the invention has the advantages of short modification time of inorganic powder, good modification effect, stable quality of the prepared solid lubricant, good resistance reduction effect, high temperature resistance and low temperature resistance, can be used for drilling of a horizontal well with high difficulty, and has great application value.
Detailed Description
All of the features disclosed in the specification of the invention, or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where mutually exclusive features or steps are claimed. The invention will be further described with reference to specific examples, which are not intended to limit the invention, but rather, unless otherwise specified, may be replaced by other equivalent or alternative features serving a similar purpose. Unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features. Terms used in the present invention generally have meanings commonly understood by those of ordinary skill in the art, unless otherwise specified.
The traditional drilling lubricant has to be improved in resistance reduction performance and serious in stratum pollution, and can not meet the requirements of drilling construction. Therefore, the inventor of the present invention has made a long-term study and a great deal of practice to provide the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The organic modifier provided by the invention comprises the following components by taking the total mass as 100 percent:
the preparation method of the organic modifier comprises the following steps:
1) stirring and mixing alkylphenol, a film forming stabilizer and a dissolution promoter at a stirring speed of 500-700 r/min at the temperature of 100-140 ℃ to obtain a primary mixture;
2) stirring and mixing the primary mixture and fatty acid at a stirring speed of 60-100 r/min in an environment of 40-70 ℃ to obtain a secondary mixture;
3) and stirring and mixing the secondary mixture and the fatty acid low-carbon alcohol ester at a stirring speed of 60-100 r/min in a room temperature environment to obtain the organic modifier.
The solid lubricant provided by the invention comprises inorganic powder and the organic modifier coated on the surface of the inorganic powder.
According to an embodiment, the inorganic powder is 325-1000 mesh graphite powder.
According to an embodiment, the weight ratio of the inorganic powder to the organic modifier is (10-15): 100.
the preparation method of the solid lubricant provided by the invention comprises the following steps: and mixing the organic modifier with the organic powder in a spraying manner, and then stirring and modifying for 30-60 min at a stirring speed of 600-800 r/min in an environment at 60-80 ℃.
The solid lubricant provided by the invention has better lubricity and organic dispersibility, can simultaneously play the effects of a stabilizer and a reinforcing agent in the drilling process, and has a better resistance reducing effect in a horizontal well with higher difficulty.
After the fatty acid low-carbon alcohol ester, the alkylphenol and the fatty acid are used in a combined mode, the organic modifier has good film forming performance, is good in spreading and adhesion on the surface of inorganic powder, and can avoid the problem of resistance reduction function failure caused by rapid loss of a lubricant sprayed during tube discharging.
After the alkylphenol, the fatty acid, the film forming stabilizer and the dissolution promoter are used in combination, a hydrophobic layer can be formed on the outer layer of the film forming stabilizer, and the stability of the film layer is enhanced.
The organic modifier and the solid lubricant have simple production process, are easy to operate, do not relate to high-temperature and high-pressure reaction and high-risk chemicals, and have green and environment-friendly raw materials and higher safety.
The organic modifier can also be directly sold to downstream manufacturers, and the downstream manufacturers use the organic modifier to modify inorganic powder to prepare the solid lubricant. The organic modifier and the solid lubricant have stable product quality and are convenient to use in cold seasons and regions.
The invention also reduces the phenomenon that the organic modifier and the inorganic powder can not be completely mixed due to small inorganic powder particles by a two-step modification mode of firstly atomizing and mixing the organic modifier and the inorganic powder and then stirring at a high speed, improves the modification effect and shortens the modification time.
The present invention will be further described with reference to the following examples. However, the present invention is not limited to the following examples. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions not mentioned are conventional conditions in the industry. The technical features of the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.
The starting materials used in the following examples and comparative examples are all commercially available. Wherein the fatty acid methyl ester is produced by Suzhou Fengbang biotechnology limited, and is of the brand No. 1507 and 1192. The white oil is No. 10 white oil of medium petrochemical industry.
In the following examples and comparative examples, "%" is a mass percent unless otherwise specified.
Example 1
The organic modifier comprises the following raw material components: 84% of C8-C18 fatty acid methyl ester, 10% of nonyl phenol, 1% of zinc stearate, 0.5% of butyl cellosolve acetate and 4.5% of caprylic acid.
The preparation method of the organic modifier comprises the following steps:
(1) adding nonyl phenol, zinc stearate and hexanediol butyl ether acetate into a reaction kettle, heating while stirring, controlling the temperature at 120 ℃, and stirring at the speed of 60r/min until the zinc stearate is dissolved and uniformly mixed;
(2) cooling to room temperature, adding octanoic acid, heating to 40 deg.C, stirring at 60r/min, and mixing;
(3) cooling to room temperature, adding C8-C18 fatty acid methyl ester, stirring at 60r/min, and mixing to obtain organic modifier No. 1.
The preparation method of the solid lubricant comprises the following steps:
mixing 1.5kg of organic modifier 1# with compressed air through an atomizing nozzle in an air flow mixer for atomization, adding into 10kg of 325-mesh graphite powder, mixing for 30 minutes, adding into a high-speed mixer, and controlling modification conditions: stirring speed is 600r/min, modification temperature is 60 ℃, and modification time is 30 minutes, so that the solid lubricant 1-1 is obtained.
As above, the solid lubricant 1-2 was prepared by a method substantially the same as that of the solid lubricant 1-1 except that 325 mesh graphite powder was changed to 500 mesh graphite powder.
As above, the solid lubricant 1-3 was prepared by a method substantially the same as that of the solid lubricant 1-1 except that 325 mesh graphite powder was changed to 600 mesh graphite powder.
As above, the solid lubricant 1-4 was prepared by a method substantially the same as that of the solid lubricant 1-1 except that 325 mesh graphite powder was changed to 800 mesh graphite powder.
As above, the solid lubricant 1 to 5 was prepared by a method substantially the same as that of the solid lubricant 1 to 1 except that the 325 mesh graphite powder was changed to 1000 mesh graphite powder.
As above, the solid lubricants 1 to 6 were prepared by a method substantially the same as that of the solid lubricant 1 to 1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 60 ℃, and the modification time is 30 minutes.
As above, the solid lubricants 1 to 7 were prepared by a method substantially the same as that of the solid lubricant 1 to 1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 70 ℃, and the modification time is 30 minutes.
As above, the solid lubricants 1 to 8 were prepared by a method substantially the same as that of the solid lubricant 1 to 1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 80 ℃, and the modification time is 30 minutes.
Similarly, the solid lubricant 1-9 was prepared by a method substantially similar to that of the solid lubricant 1-1 except that the charged mass of the organic modifier No. 1 was changed to 1 kg.
The reduction rate of the lubrication coefficient of the solid lubricant 1-9 is tested according to a Q/SY 17375-2016 method, and 325 meshes of graphite powder and an organic modifier 1# are used as controls. The results of the rate of reduction of the lubricity coefficient are shown in Table 1.
TABLE 1
Table 1 shows that the reduction rate of the lubrication coefficient of the organic modifier 1# reaches 83.5 percent, and the reduction rates of the lubrication coefficients of the solid lubricants 1-1 to 1-9 reach more than 65 percent, thereby meeting the technical requirement of the solid lubricant graphite for the drilling fluid published in Q/SY 17375-.
Example 2
The organic modifier comprises the following raw material components: 84% of C8-C18 fatty acid methyl ester, 10% of p-dodecylphenol, 1% of magnesium stearate, 0.5% of phenethyl phenol polyoxyethylene ether and 4.5% of caprylic-capric acid.
The preparation method of the organic modifier comprises the following steps:
(1) adding p-dodecylphenol, magnesium stearate and phenethyl phenol polyoxyethylene ether into a reaction kettle, heating while stirring, controlling the temperature at 130 ℃, and stirring at the speed of 100r/min until the magnesium stearate is dissolved and mixed uniformly;
(2) cooling to room temperature, adding caprylic-capric acid, heating to 50 deg.C, stirring at 100r/min, and mixing;
(3) cooling to room temperature, adding C8-C18 fatty acid methyl ester, stirring at 100r/min, and mixing to obtain organic modifier 2 #.
The preparation method of the solid lubricant comprises the following steps:
mixing 1.5kg of organic modifier No. 2 with compressed air in an air flow mixer through an atomizing nozzle for atomization, adding into 10kg of 325-mesh graphite powder, mixing for 30 minutes, adding into a high-speed mixer, and controlling modification conditions: stirring speed is 600r/min, modification temperature is 60 ℃, and modification time is 30 minutes, so that the solid lubricant 2-1 is obtained.
As above, the solid lubricant 2-2 was prepared by a method substantially the same as that of the solid lubricant 2-1 except that the 325 mesh graphite powder was changed to 500 mesh graphite powder.
Similarly, the solid lubricant 2-3 is prepared by a method basically similar to that of the solid lubricant 2-1, except that 325-mesh graphite powder is replaced by 600-mesh graphite powder.
Similarly, the solid lubricant 2-4 is prepared by a method basically similar to that of the solid lubricant 2-1, except that 325-mesh graphite powder is replaced by 800-mesh graphite powder.
Similarly, the solid lubricant 2-5 is prepared by a method basically similar to that of the solid lubricant 2-1, except that 325-mesh graphite powder is replaced by 1000-mesh graphite powder.
As above, the solid lubricant 2-6 was prepared by a method substantially the same as that of the solid lubricant 2-1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 60 ℃, and the modification time is 30 minutes.
As above, the solid lubricant 2-7 was prepared by a method substantially the same as that of the solid lubricant 2-1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 70 ℃, and the modification time is 30 minutes.
As above, the solid lubricant 2 to 8 was prepared by a method substantially the same as that of the solid lubricant 2 to 1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 80 ℃, and the modification time is 30 minutes.
Similarly, the solid lubricant 2-9 was prepared by a method substantially similar to that of the solid lubricant 2-1 except that the charge mass of the organic modifier No. 2 was changed to 1 kg.
The reduction rate of the lubrication coefficient of the solid lubricants 2-1 to 2-9 is tested according to the Q/SY 17375-2016 method, and 325 meshes of graphite powder and an organic modifier 2# are used as comparison. The results of the rate of reduction of the lubricity coefficient are shown in Table 2.
TABLE 2
| Sample(s) | Reduction ratio of lubricity coefficient (%) |
| Blank graphite powder (325 mesh) | 33.5 |
| Organic modifier 2#, and | 83.9 |
| solid lubricant 2-1 | 65.3 |
| Solid lubricant 2-2 | 66.2 |
| Solid lubricant 2-3 | 65.2 |
| Solid lubricant 2-4 | 67.2 |
| Solid lubricant 2-5 | 67.5 |
| Solid lubricant 2-6 | 65.7 |
| Solid lubricant 2-7 | 66.1 |
| Solid lubricant 2-8 | 66.0 |
| Solid lubricant 2-9 | 65.1 |
Table 2 shows that the reduction rate of the lubrication coefficient of the organic modifier 2# reaches 83.9 percent, and the reduction rates of the lubrication coefficients of the solid lubricants 2-1 to 2-9 reach more than 65 percent, thereby meeting the technical requirement of the solid lubricant graphite for the drilling fluid published in Q/SY 17375-.
Example 3
The organic modifier comprises the following raw material components: 84% of C8-C18 fatty acid methyl ester, 10% of p-tetradecylphenol, 1% of calcium stearate, 1% of butyl cellosolve acetate and 4% of oleic acid.
The preparation method of the organic modifier comprises the following steps:
(1) adding the tetradecylphenol, the calcium stearate and the hexanediol butyl ether acetate into a reaction kettle, heating while stirring, controlling the temperature at 140 ℃, and stirring at a speed of 80r/min until the calcium stearate is dissolved and uniformly mixed;
(2) cooling to room temperature, adding oleic acid, heating to 50 deg.C, stirring at 100r/min, and mixing;
(3) cooling to room temperature, adding C8-C18 fatty acid methyl ester, stirring at 100r/min, and mixing to obtain organic modifier 3 #.
The preparation method of the solid lubricant comprises the following steps:
mixing 1.5kg of organic modifier No. 3 with compressed air in an air flow mixer through an atomizing nozzle for atomization, adding into 10kg of 325-mesh graphite powder, mixing for 30 minutes, adding into a high-speed mixer, and controlling modification conditions: stirring speed is 600r/min, modification temperature is 60 ℃, and modification time is 30 minutes, so that the solid lubricant 3-1 is obtained.
Similarly, the solid lubricant 3-2 was prepared by a method substantially the same as that of the solid lubricant 3-1 except that the graphite powder of 325 mesh was changed to graphite powder of 500 mesh.
Similarly, the solid lubricant 3-3 was prepared by a method substantially the same as that of the solid lubricant 3-1 except that the 325-mesh graphite powder was changed to 600-mesh graphite powder.
Similarly, the solid lubricant 3-4 is prepared by a method basically similar to that of the solid lubricant 3-1 except that 325-mesh graphite powder is replaced by 800-mesh graphite powder.
Similarly, the solid lubricant 3-5 was prepared by a method substantially the same as that of the solid lubricant 3-1 except that the 325-mesh graphite powder was changed to 1000-mesh graphite powder.
As above, the solid lubricant 3-6 was prepared by a method substantially the same as that of the solid lubricant 3-1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 60 ℃, and the modification time is 30 minutes.
As above, the solid lubricant 3-7 was prepared by a method substantially the same as that of the solid lubricant 3-1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 70 ℃, and the modification time is 30 minutes.
As above, the solid lubricant 3-8 was prepared by a method substantially the same as that of the solid lubricant 3-1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 80 ℃, and the modification time is 30 minutes.
Similarly, the solid lubricant 3-9 was prepared by a method substantially similar to that of the solid lubricant 3-1 except that the charged mass of the organic modifier No. 3 was changed to 1 kg.
The reduction rate of the lubrication coefficient of the solid lubricants 3-1 to 3-9 is tested according to the Q/SY 17375-2016 method, and 325 meshes of graphite powder and an organic modifier 3# are used as comparison. The results of the rate of reduction of the lubricity coefficient are shown in Table 3.
TABLE 3
Table 3 shows that the reduction rate of the lubrication coefficient of the organic modifier 3# reaches 82.5 percent, and the reduction rates of the lubrication coefficients of the solid lubricants 3-1 to 3-9 reach more than 60 percent, thereby meeting the technical requirement of the solid lubricant graphite for the drilling fluid published in Q/SY 17375-.
Example 4
The organic modifier comprises the following raw material components: 80% of C8-C18 fatty acid methyl ester, 15% of m-pentadecyl phenol, 1% of zinc stearate, 1% of phenethyl phenol polyoxyethylene ether and 3% of oleic acid.
The preparation method of the organic modifier comprises the following steps:
(1) adding m-pentadecylphenol, zinc stearate and phenethyl phenol polyoxyethylene ether into a reaction kettle, heating while stirring, controlling the temperature at 130 ℃, and stirring at the speed of 100r/min until the zinc stearate is dissolved and uniformly mixed;
(2) cooling to room temperature, adding octanoic acid, heating to 50 deg.C, stirring at 100r/min, and mixing;
(3) cooling to room temperature, adding C8-C18 fatty acid methyl ester, stirring at 100r/min, and mixing to obtain the organic modifier No. 4.
The preparation method of the solid lubricant comprises the following steps:
mixing 1.5kg of organic modifier No. 4 with compressed air in an air flow mixer through an atomizing nozzle for atomization, adding into 10kg of 325-mesh graphite powder, mixing for 30 minutes, adding into a high-speed mixer, and controlling modification conditions: stirring speed is 600r/min, modification temperature is 60 ℃, and modification time is 30 minutes, so that solid lubricant 4-1 is obtained.
Similarly, the solid lubricant 4-2 was prepared by a method substantially the same as that of the solid lubricant 4-1 except that the graphite powder of 325 mesh was changed to graphite powder of 500 mesh.
Similarly, the solid lubricant 4-3 was prepared by a method substantially the same as that of the solid lubricant 4-1 except that the 325-mesh graphite powder was changed to 600-mesh graphite powder.
Similarly, the solid lubricant 4-4 was prepared by a method substantially the same as that of the solid lubricant 4-1 except that the 325-mesh graphite powder was changed to 800-mesh graphite powder.
Similarly, the solid lubricant 4-5 was prepared by a method substantially the same as that for the solid lubricant 4-1 except that the 325 mesh graphite powder was changed to 1000 mesh graphite powder.
As above, the solid lubricant 4-6 was prepared by a method substantially the same as that of the solid lubricant 4-1 except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 60 ℃, and the modification time is 30 minutes.
As above, the solid lubricant 4-7 was prepared by a method substantially the same as that of the solid lubricant 4-1 except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 70 ℃, and the modification time is 30 minutes.
Similarly, the solid lubricant 4-8 was prepared by a method substantially similar to that of the solid lubricant 4-1, except that the modification conditions were controlled: the stirring speed is 800r/min, the modification temperature is 80 ℃, and the modification time is 30 minutes.
Similarly, the solid lubricant 4-9 was prepared by a method substantially similar to that of the solid lubricant 4-1 except that the charged mass of the organic modifier No. 4 was changed to 1 kg.
The reduction rate of the lubrication coefficient of the solid lubricant 4-1-4-9 is tested according to the Q/SY 17375-2016 method, and 325 meshes of graphite powder and an organic modifier 4# are used as a reference. The results of the rate of reduction of the lubricity coefficient are shown in Table 4.
TABLE 4
| Sample (I) | Reduction ratio of lubricity coefficient (%) |
| Blank graphite powder (325 mesh) | 33.5 |
| Organic modifier 4# | 84.2 |
| Solid lubricant 4-1 | 68.5 |
| Solid lubricant 4-2 | 69.5 |
| Solid lubricant 4-3 | 68.8 |
| Solid lubricant 4-4 | 68.7 |
| Solid lubricant 4-5 | 67.5 |
| Solid lubricant 4-6 | 68.7 |
| Solid lubricant 4-7 | 68.9 |
| Solid lubricant 4-8 | 68.3 |
| Solid lubricant 4-9 | 66.6 |
Table 4 shows that the reduction rate of the lubrication coefficient of the organic modifier 4# reaches 84.2 percent, and the reduction rates of the lubrication coefficients of the solid lubricants 4-1 to 4-9 reach more than 65 percent, thereby meeting the technical requirement of the solid lubricant graphite for the drilling fluid published in Q/SY 17375-.
Comparative example 1
The organic modifier comprises the following raw material components: 90% of white oil and 10% of trimethylolpropane oleate.
The preparation method of the organic modifier comprises the following steps:
mixing the white oil and the trimethylolpropane oleate at room temperature under stirring at a speed of 100r/min, and stirring until the mixture is uniformly mixed to obtain the organic modifier No. 5.
The preparation method of the solid lubricant comprises the following steps:
mixing 1.5kg of organic modifier No. 5 with compressed air in an air flow mixer through an atomizing nozzle for atomization, adding into 10kg of 325-mesh graphite powder, mixing for 30 minutes, adding into a high-speed mixer, and controlling modification conditions: stirring speed is 600r/min, modification temperature is 60 ℃, and modification time is 30 minutes, so that the solid lubricant 5 is obtained.
The reduction rate of the lubrication coefficient of the solid lubricant 5 was tested according to the Q/SY 17375-2016 method, and 325-mesh graphite powder and the organic modifier 5# were used as controls. The results of the rate of reduction of lubricity coefficient are shown in Table 5.
TABLE 5
| Sample (I) | Reduction ratio of lubricity coefficient (%) |
| Blank graphite powder (325 mesh) | 33.5 |
| Organic modifier 5# | 64.2 |
| Solid lubricant 5 | 56.3 |
The reduction rate of the lubrication coefficient of organic modifier # 5 was 64.2%, which was significantly lower than that of the organic modifiers prepared in examples 1 to 4, and the reduction rate of the lubrication coefficient of solid lubricant 5 was 56.3%, which was significantly lower in drag reduction performance than that of the solid lubricants prepared in examples 1 to 4. And the main component white oil of the organic modifier 5 is mineral oil which is subjected to special deep refining, and the degradation time is long.
The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.
Claims (10)
1. An organic modifier, which is characterized in that the components of the organic modifier comprise, based on 100% of the total mass of the organic modifier:
2. the organic modifier of claim 1, wherein the fatty acid lower alcohol ester is an esterification product of a C8-C22 fatty acid and a C1-C3 lower alcohol;
and/or the alkylphenol is one or more of linear carbon chain alkylphenol of C9-C16;
and/or the film forming stabilizer is one or more of zinc stearate, magnesium stearate or calcium stearate;
and/or the dissolution promoter is hexanediol butyl ether acetate and/or phenethyl phenol polyoxyethylene ether;
and/or the fatty acid is one or more of fatty acids with carbon chain lengths of 8-18.
3. The organic modifier of claim 2, wherein the fatty acid lower alcohol ester is one or more of fatty acid methyl ester, fatty acid ethyl ester or fatty acid isopropyl ester with a carbon chain length of 8-22,
and/or the alkylphenol is one or more of nonylphenol, p-dodecylphenol, p-tetradecylphenol, p-hexadecylphenol and m-pentadecylphenol;
and/or the fatty acid is one or more of caprylic acid, pelargonic acid, caprylic/capric acid, oleic acid or linoleic acid.
4. The organic modifier of claim 1, wherein the preparation method comprises the following steps:
1) stirring and mixing alkylphenol, a film forming stabilizer and a dissolution promoter at the temperature of 100-140 ℃ to obtain a primary mixture;
2) stirring and mixing the primary mixture and fatty acid at 40-70 ℃ to obtain a secondary mixture;
3) and stirring and mixing the secondary mixture and the fatty acid low-carbon alcohol ester at room temperature to obtain the organic modifier.
5. The organic modifier according to claim 4, wherein the stirring speed in step 1), step 2) and step 3) is 60 to 100 r/min.
6. A solid lubricant, characterized in that the solid lubricant comprises inorganic powder and the organic modifier of any one of claims 1 to 5 coated on the surface of the inorganic powder.
7. The solid lubricant as claimed in claim 6, wherein the inorganic powder is 325-1000 mesh graphite powder;
and/or the weight ratio of the inorganic powder to the organic modifier is (10-15): 100.
8. the method for preparing the solid lubricant according to claim 6 or 7, wherein the solid lubricant is obtained by mixing the organic modifier with the organic powder in a spray manner and modifying the surface of the organic powder.
9. The preparation method according to claim 8, wherein the modification temperature is 60-80 ℃;
and/or modifying at a stirring speed of 600-800 r/min;
and/or the modification reaction time is 30-60 min.
10. Use of a solid lubricant according to claim 6 or 7 in drilling.
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Citations (4)
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|---|---|---|---|---|
| CN102199417A (en) * | 2010-03-23 | 2011-09-28 | 张以河 | Technology for preparing mineral composite solid lubricant for well drilling on basis of by-products in chemical industry |
| CN108251078A (en) * | 2017-12-15 | 2018-07-06 | 中国石油天然气集团公司 | A kind of closure type extreme-pressure lubricant and its preparation method and application |
| CN108276977A (en) * | 2018-01-18 | 2018-07-13 | 中国石油大学(华东) | Lubricant and preparation method and water-base drilling fluid |
| CN109439296A (en) * | 2018-11-15 | 2019-03-08 | 长江大学 | A kind of lubricant for drilling fluid and preparation method thereof and its application |
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2022
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199417A (en) * | 2010-03-23 | 2011-09-28 | 张以河 | Technology for preparing mineral composite solid lubricant for well drilling on basis of by-products in chemical industry |
| CN108251078A (en) * | 2017-12-15 | 2018-07-06 | 中国石油天然气集团公司 | A kind of closure type extreme-pressure lubricant and its preparation method and application |
| CN108276977A (en) * | 2018-01-18 | 2018-07-13 | 中国石油大学(华东) | Lubricant and preparation method and water-base drilling fluid |
| CN109439296A (en) * | 2018-11-15 | 2019-03-08 | 长江大学 | A kind of lubricant for drilling fluid and preparation method thereof and its application |
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