CN112574803A - Hydraulic fluid composition for marine drilling system - Google Patents

Hydraulic fluid composition for marine drilling system Download PDF

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Publication number
CN112574803A
CN112574803A CN201910944348.9A CN201910944348A CN112574803A CN 112574803 A CN112574803 A CN 112574803A CN 201910944348 A CN201910944348 A CN 201910944348A CN 112574803 A CN112574803 A CN 112574803A
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hydraulic fluid
fluid composition
following components
weight
percentage
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Inventor
贾睿
李万英
刘卜瑜
李永超
桂砚楠
焦玉萍
张静如
陈惠卿
李耿辉
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China Petroleum and Chemical Corp
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China Petroleum and Chemical Corp
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/04—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen, halogen, and oxygen
    • C10M2211/042—Alcohols; Ethers; Aldehydes; Ketones
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/20—Containing nitrogen-to-oxygen bonds
    • C10M2215/202—Containing nitrogen-to-oxygen bonds containing nitro groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/02—Unspecified siloxanes; Silicones

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

The invention relates to the field of hydraulic fluid compositions, in particular to a hydraulic fluid composition for a marine drilling system, which comprises the following components in percentage by weight: 0.1-20% of a tackifier, 0.5-10% of a preservative, 0.1-0.5% of an extreme pressure antiwear agent, 0.1-1.5% of a demulsifier, 0.01-0.2% of an anti-foaming agent, 0.1-1% of a bactericide and the balance of deionized water. According to the hydraulic fluid composition of the marine drilling system, deionized water is selected, and the compatible viscosity index improver, the metal preservative, the extreme pressure antiwear agent, the demulsifier, the antioxidant and the bactericide are optimized, so that the corrosion and emulsification phenomena of the hydraulic fluid to metal in the using process can be obviously reduced, the infection of microorganisms can be reduced, the composition is environment-friendly and biodegradable, and is suitable for sealing and lubricating hydraulic equipment of the marine drilling system.

Description

Hydraulic fluid composition for marine drilling system
Technical Field
The invention relates to the field of hydraulic fluid compositions, in particular to a hydraulic fluid composition for a marine drilling system.
Background
With the rapid development of the world economy, the ocean development becomes an important content of the world technical innovation, and the development of the ocean oil and gas field is the important importance of the development and utilization of the ocean resources nowadays. Marine drilling systems have thus become the primary equipment for marine oil and gas exploration and development.
Compared with the land drilling system, the offshore oil and gas drilling system has the advantages that equipment of the drilling system must be intensively arranged on an offshore platform with a small area, the natural condition is severe, and the operation working condition is very complex. The main technological process of marine drilling mainly includes high and low pressure slurry system, bulk slurry and well cementing/ash tank system, slurry storing/preparing system, slurry purifying system, drilling hydraulic and blowout preventing control system, etc.
The marine drilling system equipment is in an open-air environment for a long time, and the temperature difference is large and the temperature is humid; the continuous working time of the equipment is long, and the downtime is short, so that the hydraulic fluid used by a hydraulic system of the equipment has excellent viscosity-temperature performance, corrosion resistance and emulsification resistance to meet the environmental requirements, has excellent oxidation resistance to meet the requirement of long oil change period, has excellent extreme pressure anti-wear performance to meet the lubrication requirement of high-load equipment, and has low toxicity to meet the requirement of environmental protection.
In view of the above, there is a need for a hydraulic fluid suitable for use in marine drilling systems that has excellent viscosity-temperature properties, corrosion resistance, demulsibility, antioxidant properties, extreme pressure antiwear properties and low toxicity.
Disclosure of Invention
The invention aims to develop a hydraulic fluid which has excellent viscosity-temperature performance, corrosion resistance, emulsification resistance, oxidation resistance, extreme pressure abrasion resistance and low toxicity and is suitable for a marine drilling system.
In order to achieve the purpose of the invention, the invention provides a hydraulic fluid composition for a marine drilling system, which comprises the following components in percentage by weight:
Figure BDA0002223755010000021
because the hydraulic fluid is used in a hydraulic system of a marine drilling platform, the hydraulic fluid is likely to contact with seawater, and the environmental protection performance of the hydraulic fluid is considered in order to avoid polluting the sea, the basic material of the invention selects water instead of general oil materials (including mineral type and synthetic type); meanwhile, the hydraulic fluid also needs to have the performance of common hydraulic oil, and according to the specific working conditions of the application of the hydraulic fluid (such as the characteristics of large outdoor temperature difference, humid and watery environment, easy corrosion of equipment by seawater and the like), the hydraulic fluid also needs to have excellent viscosity-temperature performance, corrosion resistance, emulsification resistance, oxidation resistance, extreme pressure wear resistance and low toxicity. Therefore, the additive is added, the corrosion and emulsification phenomena of the hydraulic fluid to metal in the using process can be obviously reduced, the infection of microorganisms can be reduced, the environment is protected, the biological degradation is realized, and the sealing and lubricating oil is suitable for sealing and lubricating hydraulic equipment of a marine drilling system.
Preferably, the hydraulic fluid composition comprises the following components in percentage by weight:
Figure BDA0002223755010000022
Figure BDA0002223755010000031
preferably, the tackifier is one or a mixture of more than two of polyalkylene glycol dimethyl ether, polyethylene glycol propylene glycol monoalkyl ether and diethylene glycol ether;
the polyethylene glycol propylene glycol monoalkyl ether has high viscosity index, low pour point, no precipitate, good shear stability, low corrosivity and permeability for metal, rubber and plastic, and good extrusion abrasion resistance.
Preferably, the preservative is one or a mixture of more than two of aminothio ester, thiocarbamate or dibutyl dithiocarbamate;
further preferably dibutyl dithiocarbamate, the dibutyl dithiocarbamate does not contain metal elements, belongs to an ashless additive, has excellent seawater corrosion resistance, and has excellent oxidation resistance and extreme pressure wear resistance.
Preferably, the extreme pressure antiwear agent is one or a mixture of more than two of neopentyl glycol oleate, trimethylolpropane trioleate or pentaerythritol tetraoleate;
the pentaerythritol tetraoleate is further preferably selected, has excellent extreme pressure wear resistance, high viscosity index, good flame resistance, no toxicity and no flammability, and has a biodegradation rate of more than 90%.
Preferably, the demulsifier is a mixture of one or more of polyether high molecular compounds, amine, ethylene oxide condensates and glycol esters;
and the preferable preference is glycol ester, and the glycol ester has excellent demulsification performance and good biodegradability and water extractability.
Preferably, the anti-foaming agent is one or a mixture of more than two of polyacrylate, polysiloxane or octyl acrylate;
further preferably polysiloxane, the polysiloxane has excellent anti-foaming performance, is particularly suitable for hydraulic fluid containing water, is suitable for various water quality conditions, and has quick defoaming and lasting foam inhibition.
Preferably, the bactericide is one or a mixture of more than two of 2-hydroxy-2-nitro-1, 3-propanediol, o-phenylphenol or o-benzyldichlorophenol;
further preferred is o-phenylphenol which is effective against bacteria and fungi, has good water solubility and low toxicity, and can suppress putrefactive odor after long-term use.
The invention mainly faces the following problems when selecting functional components: 1. the selected components are mutually soluble with water, but most of the components are oil-soluble at present; 2. the selected components are also required to have low toxicity and biodegradability; 3. the different components also have synergistic effect. And the specific selection of the above components can solve the above problems.
As a preferred combination, the specific selection of each component is:
Figure BDA0002223755010000041
or,
Figure BDA0002223755010000042
or,
Figure BDA0002223755010000043
or,
Figure BDA0002223755010000051
the preferable scheme comprises the following components in parts by weight:
comprises the following components in parts by weight:
Figure BDA0002223755010000052
the anti-wear lubricant is characterized in that the tackifier is polyethylene glycol propylene glycol monoalkyl ether, the preservative is dibutyl dithiocarbamate, the extreme pressure anti-wear agent is pentaerythritol tetraoleate, the demulsifier is ethylene glycol ester, the anti-foaming agent is polysiloxane, and the bactericide is o-phenyl phenol.
As preferred examples, the following components are included:
Figure BDA0002223755010000053
or the hydraulic fluid composition comprises the following components in percentage by weight:
Figure BDA0002223755010000061
or the hydraulic fluid composition comprises the following components in percentage by weight:
Figure BDA0002223755010000062
or the hydraulic fluid composition comprises the following components in percentage by weight:
Figure BDA0002223755010000063
the invention also provides a preparation method of the hydraulic fluid composition. The method specifically comprises the following steps: sequentially adding a tackifier, a preservative, an extreme pressure antiwear agent, a demulsifier, an antifoaming agent and a bactericide into deionized water, and stirring for 3.5-4 hours at 30-35 ℃ to obtain the composition.
The performance data of the hydraulic fluid compositions provided by the present invention, as measured, are shown in the following table:
performance data of a hydraulic fluid composition for use in a marine drilling system
Figure BDA0002223755010000071
From the pour point data, the present invention is able to have good fluidity in low temperature environments.
According to the test data of copper sheet corrosion and liquid phase corrosion, the invention does not generate corrosion to copper and stainless steel under the condition of water.
From the demulsification data, the invention can rapidly separate the external moisture in the hydraulic oil.
From the pH data, it is seen that the present invention is effective in inhibiting the production of bacteria and fungi in hydraulic fluids.
From the hydrolytic stability data, the present invention is able to maintain effective performance in the presence of water.
The wear-resisting extreme pressure wear-resisting agent has excellent extreme pressure wear-resisting performance as shown by the wear-resisting spot diameter and the vane pump test data.
The invention is biodegradable, low in toxicity and environment-friendly as shown by biodegradability and acute aquatic organism toxicity data.
In conclusion, the invention provides the hydraulic fluid composition which has the advantages of small corrosion to metal, good emulsification resistance, microbial infection reduction, environmental protection, biodegradability and suitability for sealing and lubricating the hydraulic equipment of the marine drilling system in the marine environment. The hydraulic fluid composition has stable performance and reliable quality, has excellent viscosity-temperature performance, corrosion resistance, emulsification resistance, oxidation resistance, extreme pressure abrasion resistance and low toxicity, can remarkably reduce the corrosion and emulsification phenomena of the hydraulic fluid to metal in the using process, can reduce the infection of microorganisms, is environment-friendly and biodegradable, and is suitable for sealing and lubricating hydraulic equipment of a marine drilling system.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or instruments used are conventional products available from regular distributors, not indicated by the manufacturer.
In each embodiment of the invention, the deionized water is prepared by adopting reverse osmosis equipment and electrodeionization equipment in a matching way, and the conductivity is less than 0.5 us/cm; the polyethylene glycol propylene glycol monoalkyl ether was obtained from Sanyo chemical Co, dibutyl dithiocarbamate was obtained from New Xinxiangruifeng materials Co., Ltd, and ethylene glycol ester was obtained from ExxonMobil. The aminothio ester is T323 aminothio ester purchased from Xinchang Runji chemical engineering of Suzhou, the polyether polymer compound is DL32 purchased from Tianyu petroleum additive company of Dengyang, the polyacrylate is polyacrylate purchased from Xiamen Rake chemical engineering technology, and the o-phenylphenol is o-phenylphenol purchased from Hangzhou Xinyang Fine chemical engineering company. The other reagents are all conventional and commercially available.
Example 1
The hydraulic fluid composition consists of:
Figure BDA0002223755010000081
and sequentially adding the polyalkylene glycol dimethyl ether, the aminothioester, the neopentyl glycol oleate, the polyether high molecular compound, the polyacrylate and the 2-hydroxy-2-nitro-1, 3-propylene glycol into deionized water with the conductivity of less than 5us/cm according to the dosage, and mixing and stirring for 3.5 hours at the temperature of 30 ℃ to obtain the composition.
Example 2
The hydraulic fluid composition consists of:
Figure BDA0002223755010000091
the polyethylene glycol propylene glycol monoalkyl ether, the thiocarbamate, the trimethylolpropane trioleate, the amine and ethylene oxide condensate, the polysiloxane and the o-phenylphenol are sequentially added into deionized water with the conductivity of less than 3us/cm according to the dosage, and the mixture is mixed and stirred for 3.5 hours at the temperature of 35 ℃ to obtain the composition.
Example 3
The hydraulic fluid composition consists of:
Figure BDA0002223755010000092
and adding the diethylene glycol ether, the dibutyl dithiocarbamate, the pentaerythritol tetraoleate, the ethylene glycol ester, the octyl acrylate and the o-benzyl dichlorophenol into ionic water with the conductivity of less than 1us/cm in sequence according to the dosage, and mixing and stirring for 4 hours at the temperature of 30 ℃ to obtain the composition.
Example 4
The hydraulic fluid composition consists of:
Figure BDA0002223755010000101
the polyethylene glycol propylene glycol monoalkyl ether, dibutyl dithiocarbamate, pentaerythritol tetraoleate, glycol ester, polysiloxane and o-phenyl phenol are sequentially added into ionic water with the conductivity of less than 0.5us/cm according to the dosage, and the mixture is mixed and stirred for 4 hours at the temperature of 35 ℃ to obtain the composition.
Comparative example 1
The difference compared to example 4 is that the adhesion promoter is polymethacrylate.
Comparative example 2
The difference compared to example 4 is that the corrosion inhibitor is zinc dialkyldithiophosphate.
Comparative example 3
The difference compared to example 4 is that the demulsifier is a propylene oxide/ethylene oxide copolymer.
The performance of the hydraulic fluid compositions provided in examples 1 to 4 is compared with the following table, the test items and methods are shown in table 1, and the test results are shown in table 2.
TABLE 1
Figure BDA0002223755010000102
Figure BDA0002223755010000111
TABLE 2 Performance data for a hydraulic fluid composition for use in a marine drilling system
Figure BDA0002223755010000112
From the pour point data, the present invention is able to have good fluidity in low temperature environments.
According to the test data of copper sheet corrosion and liquid phase corrosion, the invention does not generate corrosion to copper and stainless steel under the condition of water.
From the demulsification data, the invention can rapidly separate the external moisture in the hydraulic oil.
From the pH data, it is seen that the present invention is effective in inhibiting the production of bacteria and fungi in hydraulic fluids.
From the hydrolytic stability data, the present invention is able to maintain effective performance in the presence of water.
The wear-resisting extreme pressure wear-resisting agent has excellent extreme pressure wear-resisting performance as shown by the wear-resisting spot diameter and the vane pump test data.
The invention is biodegradable, low in toxicity and environment-friendly as shown by biodegradability and acute aquatic organism toxicity data.
In embodiments 1 to 4, the composition provided in embodiment 4 has the best overall performance, which indicates that the combination of polyethylene glycol propylene glycol monoalkyl ether, dibutyl dithiocarbamate, pentaerythritol tetraoleate, ethylene glycol ester, polysiloxane, o-phenyl phenol and deionized water can achieve excellent corrosion resistance, emulsification resistance and extreme pressure wear resistance, reduce microbial infection, and is environmentally friendly and biodegradable, and is particularly suitable for sealing and lubricating hydraulic equipment of a marine drilling system.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A hydraulic fluid composition for a marine drilling system, comprising the following components in percentage by weight:
Figure FDA0002223754000000011
2. the hydraulic fluid composition as claimed in claim 1, which comprises the following components in percentage by weight:
Figure FDA0002223754000000012
3. the hydraulic fluid composition as claimed in claim 1 or 2, wherein the viscosity increasing agent is selected from one or a mixture of two or more of a polyalkylene glycol dimethyl ether, a polyethylene glycol propylene glycol monoalkyl ether, a diethylene glycol ether;
preferably, the tackifier is polyethylene glycol propylene glycol monoalkyl ether.
4. The hydraulic fluid composition as claimed in any one of claims 1 to 3, wherein the corrosion inhibitor is one or a mixture of two or more of thiourethane, thiocarbamate or dibutyl dithiocarbamate; preferably, the preservative is dibutyl dithiocarbamate.
5. The hydraulic fluid composition as claimed in any one of claims 1 to 4, wherein the extreme pressure antiwear agent is one or a mixture of more than two of neopentyl glycol oleate, trimethylolpropane trioleate or pentaerythritol tetraoleate; preferably, the extreme pressure antiwear agent is pentaerythritol tetraoleate.
6. The hydraulic fluid composition as claimed in any one of claims 1 to 5, wherein the demulsifier is a mixture of one or more of a polyether polymer compound, an amine and ethylene oxide condensate, and ethylene glycol ester; preferably, the demulsifier is glycol ester;
and/or the antifoaming agent is one or a mixture of more than two of polyacrylate, polysiloxane or octyl acrylate; preferably, the anti-foaming agent is a polysiloxane.
7. The hydraulic fluid composition as claimed in any one of claims 1 to 6, wherein the bactericide is one or a mixture of two or more of 2-hydroxy-2-nitro-1, 3-propanediol, o-phenylphenol or o-benzyldichlorophenol; preferably, the bactericide is o-phenylphenol;
and/or the conductivity of the deionized water is <0.5 us/cm.
8. The hydraulic fluid composition as claimed in any one of claims 1 to 7, wherein the components are selected from the group consisting of:
Figure FDA0002223754000000021
or,
Figure FDA0002223754000000022
Figure FDA0002223754000000031
or,
Figure FDA0002223754000000032
or,
Figure FDA0002223754000000033
9. the hydraulic fluid composition as claimed in claim 1, comprising the following components in parts by weight:
Figure FDA0002223754000000034
the anti-wear lubricant is characterized in that the tackifier is polyethylene glycol propylene glycol monoalkyl ether, the preservative is dibutyl dithiocarbamate, the extreme pressure anti-wear agent is pentaerythritol tetraoleate, the demulsifier is ethylene glycol ester, the anti-foaming agent is polysiloxane, and the bactericide is o-phenyl phenol.
10. The hydraulic fluid composition as claimed in claim 1, which comprises the following components in percentage by weight:
Figure FDA0002223754000000041
or the hydraulic fluid composition comprises the following components in percentage by weight:
Figure FDA0002223754000000042
or the hydraulic fluid composition comprises the following components in percentage by weight:
Figure FDA0002223754000000043
or the hydraulic fluid composition comprises the following components in percentage by weight:
Figure FDA0002223754000000044
Figure FDA0002223754000000051
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