CN110699050B - High-temperature-resistant and saturated-salt-resistant biological lubricant and preparation method thereof - Google Patents
High-temperature-resistant and saturated-salt-resistant biological lubricant and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-temperature-resistant anti-saturated salt biomass lubricant, which comprises the following components in parts by weight: 60-80 parts of lauryl alcohol alkyl ether; 13-37 parts of a potassium oleate solution; 2-5 parts of an emulsifier; 1-2 parts of a tackifier. The lauryl alcohol alkyl ether and the potassium oleate solution in the lubricant provided by the invention have synergy, and the lauryl alcohol alkyl ether and the potassium oleate solution are mutually matched and act together, so that the obtained lubricant has the effects of high temperature resistance and saturated salt resistance. The invention also provides a preparation method of the high-temperature-resistant and saturated-salt-resistant biomass lubricant.
Description
Technical Field
The invention relates to the technical field of oil and gas well exploitation, in particular to a high-temperature-resistant and saturated-salt-resistant biomass lubricant and a preparation method thereof.
Background
Nowadays, with the increasing expansion of the field of oil exploration and development, the drilling stratum is deepened continuously, the drilling mode is renovated continuously, and the drilling difficulty is increased gradually. Wells with special conditions such as deep wells, ultra-deep wells, directional wells, horizontal wells, extended reach wells, slim-hole wells, high-density long open-hole wells and the like are increasing day by day, the drilling speed needs to be greatly improved, and the complex problems can be solved by using the lubricant for the drilling fluid.
With the increasing probability of high temperature, high pressure, and formation of plaster and various complex strata, the lubricant is generally required to have good temperature resistance and salt resistance as well as abrasion resistance and wear resistance reduction. In addition, the drilling fluid is required to have good compatibility, no corrosion to metal, no environmental pollution, no influence on analysis and evaluation of stratum data, no toxicity or low toxicity, no fluorescence or low fluorescence, easy biodegradation, no foaming, no viscosity increase and no obvious influence on the rheological property of the drilling fluid.
The drilling fluid high-temperature resistant lubricant currently used in the oil and gas drilling industry in China has relatively few varieties and has certain limitations. For example, some drilling fluids are mixed with mineral oil such as crude oil, white oil and the like, which is not environment-friendly; some drilling fluids decompose and fail when the pH is above 10; some cause foaming of the drilling fluid; some are difficult to disperse in saline, etc. In practical applications, however, many areas must be drilled with consideration of high temperature and pressure, drilling fluid foaming, and inorganic salt corrosion. Therefore, the development of the lubricant which integrates multiple functions of green, strong lubrication, temperature resistance, salt resistance, compatibility and the like has very important practical significance.
Disclosure of Invention
In view of the above, the present invention aims to provide a high temperature resistant and saturated salt resistant biomass lubricant and a preparation method thereof.
The invention provides a high-temperature-resistant anti-saturated salt biomass lubricant, which comprises the following components in parts by weight:
60-80 parts of lauryl alcohol alkyl ether;
13-37 parts of a potassium oleate solution;
2-5 parts of an emulsifier;
1-2 parts of a tackifier.
In the present invention, the lauryl alcohol alkyl ether is preferably 65 to 75 parts by weight, more preferably 68 to 72 parts by weight, and most preferably 70 parts by weight. In the present invention, the lauryl alcohol alkyl ether preferably has a structural formula shown in formula I:
in the formula I, R is an alkyl group having 1-10 carbon atoms.
In the present invention, R is preferably an alkyl group having 1 to 8 carbon atoms, more preferably an alkyl group having 2 to 6 carbon atoms, and most preferably an alkyl group having 3 to 5 carbon atoms.
The source of the lauryl alcohol alkyl group is not particularly limited in the present invention, and the lauryl alcohol alkyl group can be prepared according to a preparation method of the lauryl alcohol alkyl group well known to those skilled in the art.
In the invention, the weight part of the potassium oleate solution is preferably 15-35 parts, more preferably 20-30 parts, and most preferably 25 parts. In the present invention, the potassium oleate solution is preferably an aqueous potassium oleate solution. In the invention, the mass concentration of the potassium oleate solution is preferably 10-25%, more preferably 15-20%, and most preferably 16-18%.
The invention adopts the potassium oleate solution as the component of the lubricant, the potassium oleate solution and lauryl alcohol alkyl ether in the invention have synergistic action, and under the mutual cooperation and combined action, the obtained lubricant has good comprehensive performance.
In the invention, the emulsifier is preferably 3-4 parts by weight, and more preferably 3.5 parts by weight. In the invention, the emulsifier is preferably one or more of sorbitan monooleate, propylene glycol monostearate, diacetyl tartaric acid monoglyceride and lactate stearate. In the invention, the stearic acid lactate is preferably one or more of sodium stearate lactate, calcium stearate lactate and sodium-calcium stearate lactate.
In the invention, the weight part of the tackifier is preferably 1.2-1.8 parts, and more preferably 1.4-1.6 parts. In the invention, the tackifier is preferably high-viscosity sodium carboxymethyl cellulose, namely CMC-HV, and the polymerization degree of glucose in the high-viscosity sodium carboxymethyl cellulose is preferably 200-600, more preferably 250-550, more preferably 300-500, more preferably 350-450, and most preferably 400.
The high-viscosity sodium carboxymethyl cellulose is preferably adopted as the tackifier, and the high-viscosity sodium carboxymethyl cellulose and lauryl alcohol alkyl ether have a synergistic effect, so that the lubricant provided by the invention has better comprehensive performance under the combined action of mutual cooperation.
The invention provides a preparation method of the high-temperature-resistant and saturated-salt-resistant biomass lubricant, which comprises the following steps:
and mixing lauryl alcohol alkyl ether, a potassium oleate solution, an emulsifier and a tackifier to obtain the high-temperature-resistant anti-saturated salt biomass lubricant.
In the invention, the dosage of the lauryl alcohol alkyl ether, the potassium oleate solution, the emulsifier and the tackifier is the same as the weight parts of the lauryl alcohol alkyl ether, the potassium oleate solution, the emulsifier and the tackifier in the technical scheme, and the description is omitted. In the present invention, the types and sources of the lauryl alcohol alkyl ether, the potassium oleate solution, the emulsifier and the tackifier are the same as those of the lauryl alcohol alkyl ether, the potassium oleate solution, the emulsifier and the tackifier described in the above technical solution, and are not described herein again.
In the present invention, the mixing is preferably carried out in a reaction vessel. In the invention, the mixing temperature is preferably 40-60 ℃, more preferably 45-55 ℃, and most preferably 50 ℃. In the present invention, the mixing time is preferably 1 to 3 hours, more preferably 1.5 to 2.5 hours, and most preferably 2 hours. In the invention, the mixing is preferably carried out under the condition of stirring, and the stirring speed is preferably 1200-1800 r/min, more preferably 1300-1700 r/min, more preferably 1400-1600 r/min, and most preferably 1500 r/min.
The high-temperature-resistant and saturated-salt-resistant biomass lubricant provided by the invention has the temperature resistance of 240 ℃ and good stability in water-based drilling fluid; the extreme pressure lubrication coefficient can be remarkably reduced, the reduction rate of the fresh water slurry lubrication coefficient is more than or equal to 90%, and the reduction rate of the saturated saline slurry lubrication coefficient is more than or equal to 75%, so that the extreme pressure lubrication system plays a vital role in reducing the underground complex conditions such as sticking and the like and ensuring safe, high-quality and rapid drilling. When the addition amount of the high-temperature-resistant saturated salt-resistant biomass lubricant in the base slurry is 1%, the apparent viscosity change is small, the bubble rate is less than 3%, the surface tension reduction rate is more than or equal to 50%, the compatibility in the water-based drilling fluid is good, the lubricant does not foam and is not tackified when added into the drilling fluid, and the rheological property of the drilling fluid is not obviously influenced. The biomass lubricant provided by the invention does not corrode metal, does not pollute the environment, does not influence the analysis and evaluation of stratum data, and has low fluorescence, and the fluorescence level is less than or equal to 3. After the biomass lubricant provided by the invention is added into drilling fluid, the filtration loss of the biomass lubricant is basically unchanged, and the biomass lubricant plays an important role in stabilizing a well wall. The biomass lubricant provided by the invention is green, nontoxic, low in price, simple, rapid and efficient in preparation method.
The high-temperature-resistant and saturated-salt-resistant biomass lubricant provided by the invention can solve the problems of poor high-temperature and high-pressure stability and the like of the existing drilling fluid, has the characteristics of high-temperature resistance, saturated salt resistance, environmental protection, no toxicity, easiness in biological decomposition, no fluorescence, low price and the like, can be well compatible with a water-based drilling fluid, and is particularly suitable for special drilling operations such as extended reach wells, inclined wells, horizontal wells and the like.
The high-temperature-resistant and saturated-salt-resistant biomass lubricant provided by the invention has the characteristics of green, high-temperature resistance and saturated salt resistance, no foaming and viscosity increase when the drilling fluid is added, no obvious influence on the rheological property of the drilling fluid and the like, and is suitable for well types such as vertical wells, inclined wells, horizontal wells and the like, and fresh water, seawater and saturated salt water systems.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other examples, which may be modified or appreciated by those of ordinary skill in the art based on the examples given herein, are intended to be within the scope of the present invention.
The starting materials used in the following examples of the present invention are all commercially available products.
Example 1
Adding 1mol of lauryl alcohol, 0.15mol of chloroethane, 0.15mol of sodium hydroxide and 0.25mol of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst into a reaction kettle with a stirring, condensing and heating device, and stirring and mixing uniformly. Reacting for 16 hours at the temperature of 60 ℃ and the speed of 200rpm, cooling to room temperature, and purifying to obtain lauryl ethyl ether, wherein the structural formula of the lauryl ethyl ether is as follows:
end groups not given are methyl groups.
Adding 60 parts by weight of lauryl ether, 37 parts by weight of 10% potassium oleate aqueous solution, 2 parts by weight of sorbitan monooleate and 1 part by weight of high-viscosity sodium carboxymethyl cellulose (CMC-HV) into a stirring tank, and stirring at the temperature of 40 ℃ and the speed of 1200r/min for 3 hours to uniformly mix the components to obtain the biomass lubricant.
Example 2
Adding 1mol of lauryl alcohol, 0.15mol of chlorobutane, 0.15mol of sodium hydroxide and 0.25mol of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst into a reaction kettle with a stirring, condensing and heating device, and stirring and mixing uniformly. Reacting for 16 hours at the temperature of 80 ℃ and the rpm of 300, cooling to room temperature, and purifying to obtain lauryl butyl ether, wherein the structural formula of the lauryl butyl ether is as follows:
end groups not given are methyl groups.
Adding 80 parts by weight of lauryl butyl ether, 13 parts by weight of 15% potassium oleate aqueous solution, 5 parts by weight of propylene glycol monostearate and 2 parts by weight of high-viscosity sodium carboxymethyl cellulose (CMC-HV) into a stirring tank, and stirring at the temperature of 60 ℃ and the speed of 1800r/min for 1 hour to uniformly mix the components to obtain the biomass lubricant.
Example 3
Adding 1mol of lauryl alcohol, 0.15mol of chlorohexane, 0.15mol of sodium hydroxide and 0.25mol of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst into a reaction kettle with a stirring, condensing and heating device, and stirring and mixing uniformly. Reacting for 16 hours at the temperature of 100 ℃ and the rpm of 300, cooling to room temperature, and purifying to obtain lauryl hexyl ether, wherein the structural formula of the lauryl hexyl ether is as follows:
end groups not given are methyl groups.
70 parts by weight of lauryl alcohol hexyl ether, 25 parts by weight of 20% potassium oleate aqueous solution, 4 parts by weight of diacetyl tartaric acid monoglyceride and 1 part by weight of high-viscosity sodium carboxymethyl cellulose (CMC-HV) are added into a stirring tank, and stirred for 2 hours at the temperature of 50 ℃ and the speed of 1500r/min, so that the biomass lubricant is obtained.
Example 4
Adding 1mol of lauryl alcohol, 0.15mol of chlorooctane, 0.15mol of sodium hydroxide and 0.25mol of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst into a reaction kettle with a stirring, condensing and heating device, and stirring and mixing uniformly. Reacting for 16 hours at the temperature of 110 ℃ and the speed of 300rpm, cooling to room temperature, and purifying to obtain lauryl octyl ether, wherein the structural formula of the lauryl octyl ether is as follows:
end groups not given are methyl groups.
Adding 65 parts by weight of octyl lauryl ether, 30 parts by weight of 25% potassium oleate aqueous solution, 3 parts by weight of sodium-calcium stearoyl lactylate and 2 parts by weight of high-viscosity sodium carboxymethyl cellulose (CMC-HV) into a stirring tank, and stirring at the temperature of 50 ℃ and the speed of 1400r/min for 2 hours to uniformly mix the components to obtain the biomass lubricant.
Example 5
Adding 1mol of lauryl alcohol, 0.15mol of chlorodecane, 0.15mol of sodium hydroxide and 0.25mol of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst into a reaction kettle with a stirring, condensing and heating device, and stirring and mixing uniformly. Reacting for 16 hours at the temperature of 120 ℃ and the rpm of 200, cooling to room temperature, and purifying to obtain lauryl decyl ether, wherein the formula of the lauryl decyl ether is as follows:
end groups not given are methyl groups.
Adding 75 parts by weight of lauryl alcohol decyl ether, 19 parts by weight of 12% potassium oleate aqueous solution, 5 parts by weight of sorbitan monooleate and 1 part by weight of high-viscosity sodium carboxymethyl cellulose (CMC-HV) into a stirring tank, and stirring at the temperature of 60 ℃ and the speed of 1600r/min for 3 hours to uniformly mix the components to obtain the biomass lubricant.
Example 6
Adding 1mol of lauryl alcohol, 0.15mol of chlorobutane, 0.15mol of sodium hydroxide and 0.25mol of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst into a reaction kettle with a stirring, condensing and heating device, and stirring and mixing uniformly. Reacting for 16 hours at the temperature of 80 ℃ and the rpm of 300, cooling to room temperature, and purifying to obtain lauryl decyl ether, wherein the lauryl butyl ether has a structural formula:
end groups not given are methyl groups.
Adding 80 parts by weight of lauryl butyl ether, 16 parts by weight of potassium oleate water solution with mass concentration of 18%, 2 parts by weight of propylene glycol monostearate and 2 parts by weight of high-viscosity sodium carboxymethyl cellulose (CMC-HV) into a stirring tank, and stirring at the temperature of 50 ℃ and the speed of 1700r/min for 1 hour to uniformly mix the components to obtain the biomass lubricant.
Comparative example 1
The biomass lubricant prepared according to the method described in example 6 is different from example 6 in that no aqueous solution of potassium oleate is added to the biomass lubricant, and 80 parts by weight of butyl lauryl alcohol in example 6 is replaced with 96 parts by weight of butyl lauryl alcohol.
Comparative example 2
The biomass lubricant prepared according to the method described in example 6 is different from example 6 in that the high viscosity sodium carboxymethyl cellulose is not added to the biomass lubricant, and 82 parts by weight of butyl lauryl ether is used instead of 80 parts by weight of butyl lauryl ether in example 6.
Example 7
The biomass lubricants prepared in the examples and comparative examples of the invention were tested for their lubricating properties by the following methods:
adding 300mL of fresh water base slurry into 1#, 2#, 3#, 4#, 5# and 6# high-stirring cups respectively, stirring the 1#, 3# and 5# high-stirring cups for 5min, and pouring into 1#, 3# and 5# aging tanks; 3g of the biomass lubricant prepared in the inventive examples and the comparative examples is added into 2#, 4#, and 6# high stirring cup base slurry (i.e. total 8 experiments are carried out, wherein each experiment is to add the biomass lubricant prepared in one example or the comparative example into 2#, 4# and 6# high stirring cups at the same time), the stirring is carried out for 5min, and the mixture is poured into 2#, 4#, and 6# aging tanks. The aging tank 1# to 6# is hot-rolled in a roller heating furnace at 240 ℃ for 16 hours, taken out and cooled to room temperature, stirred at high speed for 5 minutes, and the lubricating coefficient of the aging tank is tested (the lubricating coefficient is tested by using an OFITE model digital display extreme pressure lubricating instrument provided by hong Kong scientific and technical Co., Ltd.), and the test results are shown in Table 1, wherein the Table 1 shows the lubricating performance of the biomass lubricant prepared in the embodiment and the comparative example in the fresh water base slurry.
Adding 300mL of fresh water base slurry into 1#, 2#, 3#, 4#, 5# and 6# high-stirring cups respectively, adding 108g of NaCl into 1#, 3# and 5# high-stirring cups, stirring for 5min, and pouring into 1#, 3# and 5# aging tanks; 108g of NaCl is added into 2#, 4# and 6# high-stirring cups, high-stirring is carried out for 5min, 3g of the biomass lubricants prepared in the examples and the comparative examples are added (similarly, 8 experiments are carried out, the biomass lubricant prepared in one example or comparative example is simultaneously added into the 2#, 4# and 6# high-stirring cups in each experiment), then high-stirring is carried out for 5min, the biomass lubricants are poured into 2#, 4# and 6# aging tanks, the 1# -6 # aging tanks are subjected to hot rolling in a roller heating furnace at 240 ℃ for 16 h, the biomass lubricants are taken out and cooled to room temperature, high-stirring is carried out for 5min, the lubricating coefficients of the biomass lubricants are tested (the testing instruments are the same as above), and the testing results are shown in Table 2, wherein Table 2 shows the lubricating performance of the biomass lubricants prepared in the examples and the comparative examples of the invention in saline base slurry.
In the lubricating coefficient detection process, the rotating speed of the high-speed stirrer during high stirring is 11000 +/-300 r/min; the preparation method of the fresh water-based slurry comprises the steps of adding 300mL of distilled water, 0.6g of anhydrous sodium carbonate and 15g of sodium bentonite into a high-stirring cup, stirring for 20min at a high speed, at least cutting off the mixture twice during the stirring to scrape off adherends adhered to the cup wall, and maintaining for 24 hours at the temperature of (25 +/-1 ℃) to enable the apparent viscosity to reach (13-15) mpa.s, wherein if the apparent viscosity cannot reach (13-15) mpa.s, the addition amount of the bentonite can be properly adjusted.
TABLE 1 lubricating properties of Biomass lubricants prepared in inventive and comparative examples in fresh water slurries
TABLE 2 lubricating properties of Biomass lubricants prepared in inventive and comparative examples in saturated brine slurries
As can be seen from tables 1 and 2, the fresh water slurry lubrication coefficient reduction rate of the biomass lubricant prepared by the invention is more than 90% and the saturated saline lubrication coefficient reduction rate is more than 75% under the condition of high temperature of 240 ℃, which shows that the biomass lubricant has excellent lubricating property, temperature resistance and salt resistance.
Example 8
The biomass lubricating oil prepared in the embodiment and the comparative example of the invention is subjected to a bubble rate test, and the specific method comprises the following steps:
fresh water base slurry was prepared according to the method described in example 7, 300mL of fresh water base slurry was added to 1#, 3#, and 5# highly stirred cups, 3g of the biomass lubricating oil prepared in examples and comparative examples was added to the highly stirred cups (8 experiments were performed, one biomass lubricating oil prepared in examples or comparative examples was added to 1#, 3# and 5# highly stirred cups at the same time for each experiment), the high stirring was performed for 5min, the time was started after the stirring was stopped, the slurry was poured into a 500mL measuring cylinder within 20s, the volume was read within 30s, the foaming rate was calculated, and the test results are shown in table 3, where table 3 shows the foaming properties of the biomass lubricating oil prepared in examples and comparative examples in fresh water base slurry.
TABLE 3 foaming Properties of Biomass lubricants prepared in inventive and comparative examples in fresh water slurry
As can be seen from Table 3, the foaming ratio of the biomass lubricant prepared by the invention is less than or equal to 4.0 percent after the biomass lubricant is added into the base slurry, which shows that the lubricant has good compatibility with the water-based drilling fluid and basically does not foam.
Example 9
The biomass lubricant prepared in the embodiment of the invention is subjected to a fluorescence grade test, 20mL of chloroform is added into 100mL beakers which are cleanly dried and have the numbers of 1#, 2#, and 3#, 1g of the biomass lubricant prepared in the embodiment and the comparative example is added (8 experiments are carried out, the biomass lubricant prepared in one embodiment or the comparative example is simultaneously added into 1#, 2#, and 3# high-stirring cups in each experiment), the mixture is shaken, placed and clarified, 10-15 mL of clear liquid is poured into a clean test tube, the fluorescence is compared with related standard series under a geological fluorescence instrument to determine the grade, the detection result is shown in Table 4, and Table 4 shows the fluorescence performance of the biomass lubricant prepared in the embodiment of the invention.
TABLE 4 fluorescence properties of Biomass lubricants prepared in accordance with examples of the invention
As can be seen from Table 4, the biomass lubricant prepared by the invention has the characteristic of low fluorescence, and the fluorescence level is less than or equal to 3, which shows that after the biomass lubricant is added, the biomass lubricant has no fluorescence interference and is beneficial to finding a reservoir stratum during exploration.
Example 10
The biomass lubricants prepared in the examples and the comparative examples of the invention are tested for apparent viscosity and filtration loss, and the specific method comprises the following steps:
fresh water base slurry is prepared according to the method of the embodiment 7, 400mL of fresh water base slurry is respectively added into 1#, 2#, 3#, 4#, 5# and 6# high stirring cups, the 1#, 3# and 5# high stirring cups are stirred for 5min, the biomass lubricant 4g prepared in the embodiment and the comparative example is added into the 2#, 4# and 6# (8 experiments are carried out totally, the biomass lubricant prepared in one embodiment or the comparative example is added into the 2#, 4# and 6# high stirring cups at the same time in each experiment), the reading of the slurry in the 1# to 6# high stirring cups at 600 revolutions is tested (the measurement is carried out by adopting an ZNN-D6B type electric six-speed viscometer provided by Qingdao Youdio electronics Co., Ltd.), the apparent viscosity is calculated, and the medium pressure filtration capacity of the slurry is tested (the measurement is carried out by adopting a SD-4 type multi-medium pressure filtration instrument provided by Qingdao electronics Co., Ltd., the results of the measurements are shown in tables 5 and 6.
TABLE 5 apparent viscosity Properties of Biomass Lubricants prepared in inventive and comparative examples in fresh water slurries
As can be seen from table 5, the apparent viscosity of the biomass lubricant prepared by the present invention is slightly reduced after the biomass lubricant is added into the fresh water slurry, and therefore, the biomass lubricant prepared by the present invention has no significant influence on the rheological properties of the drilling fluid.
Table 6 fluid loss performance of biomass lubricants prepared in accordance with the present invention in fresh water slurries
As can be seen from Table 6, the change of the filtration loss of the biomass lubricant prepared by the method is small after the biomass lubricant is added into the fresh water base slurry, and the biomass lubricant provided by the invention plays an important role in stabilizing the well wall.
Example 11
The biomass lubricants prepared in the examples and the comparative examples of the invention are subjected to surface tension test, and the specific method comprises the following steps:
50mL of distilled water was poured into the sample cup, the surface tension value of distilled water was measured according to the method of using the wetting contact angle measuring instrument, 50mL of distilled water was poured into the sample cup, 0.75g of the biomass lubricant prepared in the examples and comparative examples of the present invention was added (8 experiments were performed in total, one biomass lubricant prepared in the examples or comparative examples was added for each experiment), the mixture was stirred with a glass rod for 5min, and the surface tension value of the aqueous solution containing the lubricant was measured according to the method of using the wetting contact angle measuring instrument, and the measurement results are shown in Table 7.
Table 7 surface tension of biomass lubricants prepared in inventive and comparative examples in aqueous solution
As can be seen from Table 7, the biomass lubricant prepared by the method is added, the surface tension is reduced, the reduction rate is more than or equal to 56%, and the performance plays an important role in preventing the shale from being hydrated, expanded and dispersed, preventing the borehole wall from collapsing and the like.
Example 12
The biomass lubricant prepared by the embodiment of the invention is subjected to biotoxicity test, and the specific method comprises the following steps:
the biomass lubricant prepared by the embodiment of the invention is prepared into 200mL of 50000mg/L solution by using 3% sodium chloride solution by mass concentration, stirring the mixture for 30min at the rotating speed of 12000r/min to fully dissolve the sample, preparing 10mL of biomass lubricant prepared by the embodiment of the invention with the mass content of 0, 10000mg/L, 25000mg/L, 50000mg/L, 100000mg/L and 200000mg/L by using the solution (6 experiments are carried out in total, the biomass lubricant prepared by one embodiment is tested in each experiment), standing for 60min, then adding 10mg of luminous bacteria T3 powder into the solutions with different biomass lubricant concentrations, fully shaking and uniformly mixing, and respectively testing the relative luminescence value EC of the photogenic bacteria after the photogenic bacteria are contacted with the solution with the biomass lubricant for 15min by using a sodium chloride solution with the mass concentration of 3% as a comparison.50The test results are shown in table 8, and table 8 shows the results of the biotoxicity test of the biomass lubricants prepared in the examples of the present invention.
Table 8 biotoxicity test results for biomass lubricants prepared in example 8 of the present invention
| Examples | 1 | 2 | 3 | 4 | 5 | 6 |
| EC50，mg/L | 164400 | 174200 | 175000 | 165500 | 161800 | 177000 |
As can be seen from Table 8, the EC for the biomass lubricant samples prepared according to the invention50The value is more than or equal to 164400mg/L (far exceeds the non-toxic index 30000mg/L specified by national environmental protection), which indicates that the biomass lubricant prepared by the invention is green and non-toxic.
Example 13
The biomass lubricant prepared by the embodiment of the invention is subjected to animal toxicity test, and the specific method comprises the following steps:
the method for acute oral toxicity test in the disinfection technical Specification of the Ministry of health (2002) is adopted, and a white mouse is used for animal toxicity test, and the specific test method comprises the following steps:
(a) materials and animals
Animal sources: 20 clean-grade Kunming mice with the weight of 18-22 g are provided by the experimental animal center of military medical science institute of liberation force of Chinese people.
Animal breeding environment: feeding in group cages at room temperature (20-22.6) deg.C and relative humidity (44.0-57.3)% RH, 10 animals per cage.
(b) Experimental methods
The detection basis is as follows: section 2.3.1 of the Ministry of health "Specification for Disinfection" (2002 edition):
the preparation method of the tested animal comprises the following steps: weighing 5g of the biomass lubricant prepared in the embodiment of the invention (6 experiments are carried out, and one biomass lubricant prepared in one embodiment is tested in each experiment), adding 10mL of corn oil, mixing uniformly, and directly intragastrically;
according to the requirement of 'one-time maximum test', 20 healthy adult mice are selected, half of the mice are female and male, the dosage is designed according to that the female is 5000mg/kgBW, the male is 5000mg/kgBW, the test object is given by oral gavage according to 0.2mL/10gBW, the animals before the gavage are fasted for 16 hours, the animals freely drink water, the animals after the gavage are given normal diet, the observation is carried out for 14 days, the toxic signs and the death condition are recorded, the detection results are shown in a table 9, and the table 9 is the animal toxicity detection result of the biomass lubricant prepared by the embodiment of the invention.
Table 9 animal toxicity test results of the biomass lubricants prepared in the examples of the present invention
As can be seen from Table 9, the experimental animals grew normally during the test period, no signs of toxicity or death was observed, and no abnormality was observed in gross anatomy. Thus, acute oral LD of male and female mice50Greater than 5000 mg/kg. According to the judgment of the chemical acute oral toxicity classification standard in the disinfection technical Specification (2002 edition) of the Ministry of health, the biomass lubricant provided by the invention has no harm to animals, and is nontoxic and environment-friendly.
According to the experimental tests, the prepared biomass lubricant for the drilling fluid has the temperature resistance of 240 ℃, the reduction rate of the lubricating coefficient of fresh water slurry is more than or equal to 90%, and the reduction rate of the lubricating coefficient of saturated salt water is more than or equal to 75%; after the lubricant is added into the fresh water slurry, the change of apparent viscosity is small, the change of filtration loss is small, the foaming rate is less than or equal to 4 percent, and the reduction rate of surface tension is more than or equal to 56 percent; low fluorescence, the fluorescence level is less than or equal to 3; the biotoxicity is EC50Not less than 164400mg/L, animal LD50≥5000mgL, good environmental protection. The drilling fluid has no sediment when being mixed with water-based drilling fluid, has good compatibility, and has the characteristics of high temperature resistance, environmental protection, no toxicity and the like.
From the above embodiments, the present invention provides a high temperature resistant anti-saturation salt biomass lubricant, comprising, by weight: 60-80 parts of lauryl alcohol alkyl ether; 13-37 parts of a potassium oleate solution; 2-5 parts of an emulsifier; 1-2 parts of a tackifier. The lauryl alcohol alkyl ether and the potassium oleate solution in the lubricant provided by the invention have synergy, and the lauryl alcohol alkyl ether and the potassium oleate solution are mutually matched and act together, so that the obtained lubricant has the effects of high temperature resistance and saturated salt resistance.
While only the preferred embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A high temperature resistant anti-saturation salt biomass lubricant comprises the following components in parts by weight:
60-80 parts of lauryl alcohol alkyl ether;
13-37 parts of a potassium oleate aqueous solution;
2-5 parts of an emulsifier;
1-2 parts of a tackifier;
the lauryl alcohol alkyl ether has the structure of formula I:
in the formula I, R is alkyl with 1-10 carbon atoms;
the mass concentration of the potassium oleate aqueous solution is 10-25%;
the emulsifier is one or more selected from sorbitan monooleate, propylene glycol monostearate, diacetyl tartaric acid monoglyceride and stearyl lactylate;
the viscosity increaser is high-viscosity sodium carboxymethyl cellulose.
2. The high temperature resistant and salt tolerant biomass lubricant of claim 1, wherein the stearoyl lactylate is selected from one or more of sodium stearoyl emulsion, calcium stearoyl lactylate, and calcium stearoyl lactylate-lactylate.
3. The high temperature resistant and anti-saturation salt biomass lubricant according to claim 1, wherein the degree of polymerization of glucose in the high viscosity sodium carboxymethyl cellulose is 200 to 600.
4. A method of making the high temperature resistant anti-saturate salt biolubricant of claim 1, comprising:
and mixing lauryl alcohol alkyl ether, a potassium oleate solution, an emulsifier and a tackifier to obtain the high-temperature-resistant anti-saturated salt biomass lubricant.
5. The method according to claim 4, wherein the temperature of the mixing is 40-60 ℃;
the mixing time is 1-3 hours.
6. The method of claim 4, wherein the mixing is performed under agitation.
7. The method of claim 6, wherein the stirring speed is 1200 to 1800 r/min.
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| US10597945B2 (en) * | 2016-02-12 | 2020-03-24 | Dover Chemical Corporation | Coiled-tubing fluid-lubricant composition and related methods |
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| CN1566295A (en) * | 2003-06-30 | 2005-01-19 | 中国石油化工股份有限公司 | Process for producing water based lubricating liquid |
| CN103805323A (en) * | 2012-11-14 | 2014-05-21 | 无锡市飞天油脂有限公司 | High-temperature grease and preparation method thereof |
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