CN115746801A - Environment-friendly drilling fluid lubricant, and preparation method and application thereof - Google Patents
Environment-friendly drilling fluid lubricant, and preparation method and application thereof Download PDFInfo
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- CN115746801A CN115746801A CN202111030828.8A CN202111030828A CN115746801A CN 115746801 A CN115746801 A CN 115746801A CN 202111030828 A CN202111030828 A CN 202111030828A CN 115746801 A CN115746801 A CN 115746801A
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- polypropylene glycol
- monoacrylate
- drilling fluid
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- 239000000314 lubricant Substances 0.000 title claims abstract description 85
- 238000005553 drilling Methods 0.000 title claims abstract description 77
- 239000012530 fluid Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920001451 polypropylene glycol Polymers 0.000 claims abstract description 159
- 229920000715 Mucilage Polymers 0.000 claims abstract description 63
- 239000000853 adhesive Substances 0.000 claims abstract description 63
- 210000003097 mucus Anatomy 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 54
- 239000003999 initiator Substances 0.000 claims abstract description 28
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 17
- 238000012986 modification Methods 0.000 claims abstract description 4
- 230000004048 modification Effects 0.000 claims abstract description 4
- 241000196324 Embryophyta Species 0.000 claims description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 50
- 239000003513 alkali Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 24
- 238000004537 pulping Methods 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 14
- 244000269261 Alocasia Species 0.000 claims description 13
- 235000006481 Colocasia esculenta Nutrition 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 8
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 8
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 8
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 235000002722 Dioscorea batatas Nutrition 0.000 claims description 2
- 235000006536 Dioscorea esculenta Nutrition 0.000 claims description 2
- 240000001811 Dioscorea oppositifolia Species 0.000 claims description 2
- 235000003416 Dioscorea oppositifolia Nutrition 0.000 claims description 2
- 244000280244 Luffa acutangula Species 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract description 21
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 30
- 238000005461 lubrication Methods 0.000 description 21
- 241001075517 Abelmoschus Species 0.000 description 13
- 235000015112 vegetable and seed oil Nutrition 0.000 description 12
- 239000008158 vegetable oil Substances 0.000 description 12
- 240000004270 Colocasia esculenta var. antiquorum Species 0.000 description 10
- 235000002723 Dioscorea alata Nutrition 0.000 description 10
- 235000005362 Dioscorea floribunda Nutrition 0.000 description 10
- 235000004868 Dioscorea macrostachya Nutrition 0.000 description 10
- 235000005361 Dioscorea nummularia Nutrition 0.000 description 10
- 235000005360 Dioscorea spiculiflora Nutrition 0.000 description 10
- 235000004879 dioscorea Nutrition 0.000 description 10
- 125000003827 glycol group Chemical group 0.000 description 10
- 239000000440 bentonite Substances 0.000 description 8
- 229910000278 bentonite Inorganic materials 0.000 description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 8
- 239000007790 solid phase Substances 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 8
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- 229910021641 deionized water Inorganic materials 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
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- 239000010773 plant oil Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
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- 235000007056 Dioscorea composita Nutrition 0.000 description 1
- 235000009723 Dioscorea convolvulacea Nutrition 0.000 description 1
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Landscapes
- Lubricants (AREA)
Abstract
The invention provides an environment-friendly drilling fluid lubricant and a preparation method and application thereof, wherein the lubricant is modified plant mucus obtained by graft modification of plant material containing mucus through polypropylene glycol monoacrylate under alkaline conditions, and the polypropylene glycol monoacrylate is subjected to polymerization reaction under the action of an initiator to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate is composed of the modified plant mucus and the polypropylene glycol monoacrylate; the amount of polypropylene glycol monoacrylate is 0.5-5% of the weight of the plant material containing mucilage. In addition, excessive polypropylene glycol monoacrylate which cannot be grafted generates polymerization reaction to generate polypropylene glycol monoacrylate which has synergistic effect with the plant mucilage grafted and modified by polypropylene glycol, so that the lubricating effect is improved, and the lubricating coefficient is reduced by more than 30%.
Description
Technical Field
The invention belongs to the technical field of drilling fluid additives, and particularly relates to an environment-friendly drilling fluid lubricant, and a preparation method and application thereof.
Background
In the process of oil and gas drilling, with the increase of complex wells such as deep wells, ultra-deep wells, highly-deviated wells, directional wells, horizontal wells and the like, higher requirements are put forward on underground friction resistance control. For example, the presence of large amounts of weighting materials results in poor lubricating properties for high density drilling fluids, and high friction resistance has become one of the core problems restricting the development of water-based drilling fluids in new situations. The oil mixing can cause serious pollution to the environment, and along with the increasing strictness of the environmental protection requirements of the world, the oil mixing measures are strictly prohibited. Under the situation, the green high-performance lubricant is added into the drilling fluid to reduce friction resistance, increase drilling speed and reduce cost, and is one of the most effective means for realizing green, safe and efficient drilling. The lubricant for the drilling fluid can improve the lubricating property of the drilling fluid, reduce downhole friction resistance, improve the rheological property and the filtration property of the drilling fluid and improve the rock breaking efficiency.
According to the phase composition of the drilling fluid lubricant, the drilling fluid lubricant mainly comprises a liquid lubricant and a solid lubricant. Liquid lubricants are the most studied and widely used lubricants, and mainly include asphalt lubricants, diesel oil lubricants, mineral oil lubricants, vegetable oil lubricants, sulfonated tall oil lubricants, polymeric alcohol lubricants, polyalphaolefin lubricants, synthetic ester lubricants, and the like. However, with the increasing strictness of environmental regulations, the use amount of conventional lubricants such as asphalt-based lubricants, diesel-based lubricants, and mineral oil-based lubricants has been decreasing year by year, and extreme pressure lubricants, environmental-friendly lubricants, and nano-lubricants have been receiving more and more attention.
The currently used environment-friendly lubricants mainly comprise modified vegetable oil, polymeric alcohol, modified graphite, plastic pellets and the like. However, there are problems in use: the modified vegetable oil is easy to increase the viscosity of the drilling fluid and paste a vibrating screen; the polymer alcohol has low environmental protection property and general action effect; the modified graphite has high chroma and large dosage; the plastic pellets have large consumption, difficult recycling and high cost.
Disclosure of Invention
The invention aims to provide an environment-friendly drilling fluid lubricant, a preparation method and application thereof, and solves the technical problems in the prior art.
The invention also aims to provide a preparation method of the environment-friendly drilling fluid lubricant, which is used for carrying out graft modification on a mucilage-containing plant material and increasing a polypropylene glycol side chain structure.
The invention also aims to provide the application of the environment-friendly drilling fluid lubricant, which has good lubricating effect in water-based drilling fluid and can reduce the lubricating coefficient by more than 30%.
Therefore, the technical scheme provided by the invention is as follows:
an environment-friendly drilling fluid lubricant is prepared by grafting and modifying plant materials containing mucus through polypropylene glycol monoacrylate under an alkaline condition to obtain modified plant mucus, then carrying out polymerization reaction on the polypropylene glycol monoacrylate under the action of an initiator to generate polypropylene glycol monoacrylate, and forming the lubricant by the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 0.5-5% of the weight of the plant material containing mucilage.
The plant material containing mucus is one or a composition of a plurality of Chinese yam, taro and okra in any proportion.
The polypropylene glycol monoacrylate is one or a composition of any proportion of polypropylene glycol 200 monoacrylate, polypropylene glycol 400 monoacrylate, polypropylene glycol 600 monoacrylate, polypropylene glycol 800 monoacrylate, polypropylene glycol 1000 monoacrylate, polypropylene glycol 1500 monoacrylate, polypropylene glycol 2000 monoacrylate, polypropylene glycol 4000 monoacrylate, polypropylene glycol 6000 monoacrylate, polypropylene glycol 8000 monoacrylate, polypropylene glycol 10000 monoacrylate and polypropylene glycol 20000 monoacrylate with the purity of industrial grade and above.
The initiator is one or a composition of more than one of industrial-grade benzoyl peroxide, lauroyl peroxide, azodiisobutyronitrile and azodiisoheptonitrile with purity higher than that of the industrial-grade benzoyl peroxide, the lauroyl peroxide, the azodiisobutyronitrile and the azodiisoheptonitrile in any proportion.
The preparation method of the environment-friendly drilling fluid lubricant comprises the following steps:
step 1) mixing plant materials containing mucus with water and pulping to obtain slurry; wherein the amount of water added is 2-5 times of the plant material containing mucilage;
step 2) centrifuging or filtering the slurry to remove insoluble substances, adding an alkali solution into the residual glue solution, stirring and heating at 40-100 ℃ for 1-6h to perform an alkalization reaction; wherein the addition amount of the alkali solution is 1-5% of the weight of the plant material containing mucus;
and 3) adding the polypropylene glycol monoacrylate with the formula amount while stirring, adding an initiator accounting for 1-5% of the mass of the polypropylene glycol monoacrylate, stirring and heating at 60-100 ℃ for 1-6 hours, and cooling to room temperature to obtain the polypropylene glycol acrylate.
The alkali solution in the step 2) is one or a mixture of two of sodium hydroxide solution and potassium hydroxide solution in any proportion.
The mass concentration of the alkali solution in the step 2) is 1-10%.
The application of the environment-friendly drilling fluid lubricant is to add the environment-friendly drilling fluid lubricant into the drilling fluid, wherein the addition amount of the environment-friendly drilling fluid lubricant is 4-10% of the mass of the water-based drilling fluid.
The invention has the beneficial effects that:
the environment-friendly drilling fluid lubricant provided by the invention modifies plant materials containing mucus, increases a polypropylene glycol side chain structure, improves the adsorption effect of the polypropylene glycol side chain structure on a solid phase surface, and improves the lubrication effect of the polypropylene glycol side chain structure in water-based drilling fluid.
The lubricant is added according to 4-10% of the water-based drilling fluid, and the lubrication coefficient of the lubricant in 4% bentonite slurry is determined by adopting a GB T16783-1997 water-based drilling fluid field test procedure, so that the lubrication coefficient can be reduced by more than 30%, and the lubricant is superior to products in the current market.
As will be described in further detail below.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the description of the exemplary embodiments is not intended to be limiting of the invention.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides an environment-friendly drilling fluid lubricant, wherein modified plant mucus is obtained by performing graft modification on a mucus-containing plant material through polypropylene glycol monoacrylate under an alkaline condition, then polypropylene glycol monoacrylate is subjected to polymerization reaction under the action of an initiator to generate polypropylene glycol monoacrylate, and the lubricant consists of the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 0.5-5% of the weight of the plant material containing mucilage.
Wherein the plant material containing mucus is one or more of rhizoma Dioscoreae, fructus Colocasiae Esculentae, and Abelmoschus esculentus at any ratio.
The polypropylene glycol monoacrylate is one or a composition of any proportion of polypropylene glycol 200 monoacrylate, polypropylene glycol 400 monoacrylate, polypropylene glycol 600 monoacrylate, polypropylene glycol 800 monoacrylate, polypropylene glycol 1000 monoacrylate, polypropylene glycol 1500 monoacrylate, polypropylene glycol 2000 monoacrylate, polypropylene glycol 4000 monoacrylate, polypropylene glycol 6000 monoacrylate, polypropylene glycol 8000 monoacrylate, polypropylene glycol 10000 monoacrylate and polypropylene glycol 20000 monoacrylate with the purity of industrial grade and above.
The initiator is one or a composition of more than one of industrial-grade benzoyl peroxide, lauroyl peroxide, azodiisobutyronitrile and azodiisoheptonitrile with purity higher than that of the industrial-grade benzoyl peroxide, the lauroyl peroxide, the azodiisobutyronitrile and the azodiisoheptonitrile in any proportion.
The principle of the invention is as follows:
under the alkaline condition, plant material containing mucus is modified, a polypropylene glycol side chain structure is added, the adsorption effect of the plant material on the solid phase surface is improved, the lubrication effect of the plant material in the water-based drilling fluid is improved, the stability of the plant material is enhanced, in addition, excessive polypropylene glycol monoacrylate which cannot be grafted generates polymerization reaction under the action of an initiator to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate and the plant mucus grafted and modified by polypropylene glycol have synergistic effect to further improve the lubrication effect.
Example 2:
on the basis of example 1, this example provides an environment-friendly drilling fluid lubricant, in which, under an alkaline condition, a plant material containing mucus is graft-modified by polypropylene glycol monoacrylate to obtain modified plant mucus, and then, under the action of an initiator, the polypropylene glycol monoacrylate is subjected to a polymerization reaction to generate polypropylene glycol monoacrylate, and the lubricant is composed of the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 0.5% by mass of the plant material containing mucilage.
In this embodiment, the mucilage-containing plant material is okra; the polypropylene glycol monoacrylate is polypropylene glycol 10000 monoacrylate, and the initiator is industrial-grade benzoyl peroxide. The preparation process comprises the following steps:
firstly, adding a mucilage-containing plant material into a pulping machine, adding water with the mass 2 times that of the mucilage, starting the pulping machine, and pulping for 3 minutes to obtain pulp; wherein the water is deionized water;
secondly, filtering the slurry to remove insoluble substances, pouring the residual glue solution into a reaction vessel, adding an alkali solution accounting for 5% of the mass of the glue solution, stirring and heating at 50 ℃ for 6 hours to carry out an alkalization reaction; wherein the alkali is industrial sodium hydroxide, and the mass concentration of the alkali solution is 1%;
and thirdly, adding polypropylene glycol monoacrylate accounting for 0.5 percent of the weight of the mucilage-containing plant material into a container under stirring, then adding an initiator accounting for 1 percent of the weight of the polypropylene glycol monoacrylate, stirring and heating for 6 hours at the temperature of 60 ℃, and cooling to room temperature to obtain the environment-friendly drilling fluid lubricant.
The modified okra mucus prepared by the embodiment has the advantages that the side chain structure of polypropylene glycol is increased, the adsorption effect of the okra mucus on the solid phase surface is improved, the lubrication effect of the okra mucus in water-based drilling fluid is improved, in addition, excessive polypropylene glycol monoacrylate which cannot be grafted generates a polymerization reaction to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate and the okra mucus which is grafted and modified by polypropylene glycol have a synergistic effect, so that the lubrication effect is further improved.
The modified okra mucilage is added according to 4% of the water-based drilling fluid, the lubricating coefficient of the modified okra mucilage in 4% bentonite slurry is measured by adopting a GB T16783-1997 water-based drilling fluid field test program, and compared with the measured value of 0.12 without the modified okra mucilage, the lubricating coefficient is reduced to 0.06, and the lubricating coefficient of a modified vegetable oil lubricant (chemical group Co., ltd. Of Changqing chemical industry Co., ltd. In Xian) added in the same amount is 0.08, which is shown in Table 1.
TABLE 1 Effect of example 2
| Lubricant agent | Coefficient of lubricity |
| 0 | 0.12 |
| 4% modified okra mucilage | 0.06 |
| 4% modified vegetable oil | 0.08 |
Example 3:
on the basis of example 1, this example provides an environment-friendly drilling fluid lubricant, in which, under an alkaline condition, a plant material containing mucus is graft-modified by polypropylene glycol monoacrylate to obtain modified plant mucus, and then, under the action of an initiator, the polypropylene glycol monoacrylate is subjected to a polymerization reaction to generate polypropylene glycol monoacrylate, and the lubricant is composed of the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 1.5% by mass of the mucilage-containing plant material.
In this embodiment, the plant material containing mucilage is yam; the polypropylene glycol monoacrylate is polypropylene glycol 6000 monoacrylate, and the initiator is chemically pure lauroyl peroxide. The preparation process comprises the following steps:
firstly, adding a mucilage-containing plant material into a pulping machine, adding water with the mass being 3 times that of the mucilage, starting the pulping machine, and pulping for 4 minutes to obtain pulp; wherein the water is deionized water;
secondly, filtering the slurry to remove insoluble substances, pouring the residual glue solution into a reaction vessel, adding an alkali solution accounting for 1% of the mass of the glue solution, stirring and heating at 80 ℃ for 4 hours to carry out an alkalization reaction; wherein the alkali is chemical pure potassium hydroxide, and the mass concentration of the alkali solution is 10 percent;
and thirdly, adding polypropylene glycol monoacrylate accounting for 1.5 percent of the weight of the mucilage-containing plant material into the container under stirring, adding an initiator accounting for 2 percent of the weight of the polypropylene glycol monoacrylate, stirring and heating for 4 hours at the temperature of 80 ℃, and cooling to room temperature to obtain the environment-friendly drilling fluid lubricant.
The modified yam mucilage prepared by the embodiment is added with a polypropylene glycol side chain structure, the adsorption effect of the modified yam mucilage on the solid phase surface is improved, and the lubrication effect of the modified yam mucilage in water-based drilling fluid is improved.
The modified yam mucilage is added according to 5% of the water-based drilling fluid, the lubricating coefficient of the modified yam mucilage in 4% bentonite slurry is measured by adopting a GB T16783-1997 water-based drilling fluid field test program, compared with the measured value of 0.12 without the modified yam mucilage, the lubricating coefficient is reduced to 0.05, the lubricating coefficient of an equivalent added modified vegetable oil lubricant (Xian Changqing chemical group Co., ltd.) is 0.07, and the result is shown in Table 2.
TABLE 2 Effect of example 3
| Lubricant agent | Coefficient of lubricity |
| 0 | 0.12 |
| 5% modified yam mucilage | 0.05 |
| 5% modified vegetable oil | 0.07 |
Example 4:
on the basis of example 1, this example provides an environment-friendly drilling fluid lubricant, in which, under an alkaline condition, a plant material containing mucus is graft-modified by polypropylene glycol monoacrylate to obtain modified plant mucus, and then, under the action of an initiator, the polypropylene glycol monoacrylate is subjected to a polymerization reaction to generate polypropylene glycol monoacrylate, and the lubricant is composed of the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 2.5% by mass of the plant material containing mucilage.
In this embodiment, the plant material containing mucilage is taro; the polypropylene glycol monoacrylate was polypropylene glycol 2000 monoacrylate, and the initiator was analytically pure azobisisobutyronitrile. The preparation process comprises the following steps:
firstly, adding a mucilage-containing plant material into a pulping machine, adding water with the mass being 4 times that of the mucilage, starting the pulping machine, and pulping for 6 minutes to obtain pulp; wherein the water is distilled water;
secondly, filtering the slurry to remove insoluble substances, pouring the residual glue solution into a reaction vessel, adding an alkali solution accounting for 3% of the mass of the glue solution, stirring and heating at 85 ℃ for 2 hours to carry out an alkalization reaction; wherein, the alkali is sodium hydroxide of analytical purity, and the mass concentration of the alkali solution is 8 percent;
and thirdly, adding polypropylene glycol monoacrylate accounting for 2.5 percent of the weight of the mucilage-containing plant material into the container under stirring, adding an initiator accounting for 3 percent of the weight of the polypropylene glycol monoacrylate, stirring and heating for 3 hours at 85 ℃, and cooling to room temperature to obtain the environment-friendly drilling fluid lubricant.
The modified taro mucilage prepared by the embodiment is added with a polypropylene glycol side chain structure, the adsorption effect of the modified taro mucilage on the solid phase surface is improved, the lubrication effect of the modified taro mucilage in the water-based drilling fluid is improved, in addition, excessive polypropylene glycol monoacrylate which cannot be grafted is subjected to polymerization reaction to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate and the taro mucilage grafted and modified by polypropylene glycol are subjected to synergistic effect, so that the lubrication effect is further improved.
The modified taro mucilage is added according to 6% of the water-based drilling fluid, the lubrication coefficient of the modified taro mucilage in 4% bentonite slurry is measured by adopting a GB T16783-1997 water-based drilling fluid field test program, and compared with the measured value of 0.12 without the modified taro mucilage, the lubrication coefficient is reduced to 0.04, and the lubrication coefficient of the modified vegetable oil lubricant (Xian Changqing chemical group Co., ltd.) added in the same amount is 0.07, which is shown in Table 3.
TABLE 3 Effect of example 4
| Lubricant agent | Coefficient of lubricity |
| 0 | 0.12 |
| 6% modified taro mucilage | 0.04 |
| 6% modified vegetable oil | 0.07 |
Example 5:
on the basis of example 1, this example provides an environment-friendly drilling fluid lubricant, in which, under an alkaline condition, a plant material containing mucus is graft-modified by polypropylene glycol monoacrylate to obtain modified plant mucus, and then, under the action of an initiator, the polypropylene glycol monoacrylate is subjected to a polymerization reaction to generate polypropylene glycol monoacrylate, and the lubricant is composed of the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 3% by mass of the plant material containing mucilage.
In this example, the mucilage-containing plant material is a combination of yam and okra in a mass ratio of 3:1; the polypropylene glycol monoacrylate is a composition of industrial grade polypropylene glycol 1000 monoacrylate and polypropylene glycol 10000 monoacrylate in a mass ratio of 4:1, and the initiator is analytically pure azodiisobutyronitrile. The preparation method comprises the following specific steps:
firstly, adding a mucilage-containing plant material into a pulping machine, adding water with the mass 5 times that of the mucilage, starting the pulping machine, and pulping for 10 minutes to obtain pulp; wherein the water is deionized water;
secondly, filtering the slurry to remove insoluble substances, pouring the residual glue solution into a reaction vessel, adding an alkali solution accounting for 4% of the mass of the glue solution, stirring and heating at 100 ℃ for 1 hour to carry out an alkalization reaction; wherein the alkali is industrial-grade potassium hydroxide, and the mass concentration of the alkali solution is 5%;
and thirdly, adding polypropylene glycol monoacrylate accounting for 3 percent of the weight of the mucilage-containing plant material into the container under stirring, then adding an initiator accounting for 5 percent of the weight of the polypropylene glycol monoacrylate, stirring and heating for 1.5 hours at the temperature of 100 ℃, and cooling to room temperature to obtain the environment-friendly drilling fluid lubricant.
The modified plant mucus prepared by the embodiment has the advantages that the polypropylene glycol side chain structure is added, the adsorption effect of the plant mucus on the solid phase surface is improved, the lubrication effect of the plant mucus in the water-based drilling fluid is improved, in addition, excessive polypropylene glycol monoacrylate which cannot be grafted generates a polymerization reaction to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate and the plant mucus grafted and modified by polypropylene glycol act synergistically to further improve the lubrication effect.
The modified plant mucus is added according to 8% of the water-based drilling fluid, the lubricating coefficient of the modified plant mucus in 4% bentonite slurry is measured by adopting a GB T16783-1997 water-based drilling fluid field test program, and compared with the measured value of 0.12 without the modified plant mucus, the lubricating coefficient is reduced to 0.05, and the lubricating coefficient of the equivalent added modified plant oil lubricant (Xian Changqing chemical group Co., ltd.) is 0.06, which is shown in Table 4.
TABLE 4 Effect of example 5
| Lubricant agent | Coefficient of lubricity |
| 0 | 0.12 |
| 8% modified plant mucilage | 0.05 |
| 8% modified vegetable oil | 0.06 |
Example 6:
on the basis of example 1, this example provides an environment-friendly drilling fluid lubricant, in which, under an alkaline condition, polypropylene glycol monoacrylate is used to graft-modify a plant material containing mucilage to obtain modified plant mucilage, and then, under the action of an initiator, the polypropylene glycol monoacrylate undergoes a polymerization reaction to generate polypropylene glycol monoacrylate, so as to form the lubricant, wherein the lubricant consists of the modified plant mucilage and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 3% by mass of the plant material containing mucilage.
In this embodiment, the plant material containing mucilage is a combination of yam and taro in a mass ratio of 1:2; the polypropylene glycol monoacrylate is analytically pure polypropylene glycol 8000 monoacrylate, and the initiator is analytically pure azobisisobutyronitrile. The preparation process comprises the following steps:
firstly, adding a mucilage-containing plant material into a pulping machine, adding water with the mass 5 times that of the mucilage, starting the pulping machine, and pulping for 10 minutes to obtain pulp; wherein the water is deionized water;
secondly, filtering the slurry to remove insoluble substances, pouring the residual glue solution into a reaction vessel, adding an alkali solution accounting for 2% of the mass of the glue solution, stirring and heating at 75 ℃ for 3 hours to carry out an alkalization reaction; wherein the alkali is industrial-grade sodium hydroxide, and the mass concentration of the alkali solution is 10%;
and thirdly, adding polypropylene glycol monoacrylate accounting for 5 percent of the weight of the mucilage-containing plant material into the container under stirring, adding an initiator accounting for 3 percent of the weight of the polypropylene glycol monoacrylate, stirring and heating for 3 hours at 75 ℃, and cooling to room temperature to obtain the environment-friendly drilling fluid lubricant.
The modified plant mucus prepared by the embodiment has the advantages that the polypropylene glycol side chain structure is added, the adsorption effect of the plant mucus on the solid phase surface is improved, the lubrication effect of the plant mucus in the water-based drilling fluid is improved, in addition, excessive polypropylene glycol monoacrylate which cannot be grafted generates a polymerization reaction to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate and the plant mucus grafted and modified by polypropylene glycol act synergistically to further improve the lubrication effect.
The modified plant mucus is added according to 10 percent of the water-based drilling fluid, the lubricating coefficient of the modified plant mucus in 4 percent bentonite slurry is measured by adopting a GB T16783-1997 water-based drilling fluid field test program, compared with the measured value of 0.12 without the modified plant mucus, the lubricating coefficient is reduced to 0.03, and the lubricating coefficient of the equivalent added modified plant oil lubricant (Xian Changqing chemical group Co., ltd.) is 0.05, which is shown in Table 5.
TABLE 5 Effect of example 6
| Lubricant agent | Coefficient of lubricity |
| 0 | 0.12 |
| 10% modified plant mucilage | 0.03 |
| 10% modified vegetable oil | 0.05 |
Example 7:
on the basis of example 1, this example provides an environment-friendly drilling fluid lubricant, in which, under an alkaline condition, a plant material containing mucus is graft-modified by polypropylene glycol monoacrylate to obtain modified plant mucus, and then, under the action of an initiator, the polypropylene glycol monoacrylate is subjected to a polymerization reaction to generate polypropylene glycol monoacrylate, and the lubricant is composed of the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 3% by mass of the plant material containing mucilage.
In this example, the mucilage-containing plant material is a combination of taro and okra in a mass ratio of 5:1; the polypropylene glycol monoacrylate is analytically pure polypropylene glycol 4000 monoacrylate, and the initiator is a composition of industrial grade benzoyl peroxide and lauroyl peroxide in a mass ratio of 1:1. The preparation process comprises the following steps:
firstly, adding a mucilage-containing plant material into a pulping machine, adding water with the mass being 3 times that of the mucilage, starting the pulping machine, and pulping for 9 minutes to obtain pulp; wherein the water is deionized water;
secondly, filtering the slurry to remove insoluble substances, pouring the residual glue solution into a reaction vessel, adding an alkali solution accounting for 5% of the mass of the glue solution, stirring and heating at 80 ℃ for 3 hours to carry out an alkalization reaction; wherein the alkali is industrial sodium hydroxide, and the mass concentration of the alkali solution is 8%;
and thirdly, adding polypropylene glycol monoacrylate accounting for 4% of the weight of the mucilage-containing plant material into the container under stirring, adding an initiator accounting for 2% of the weight of the polypropylene glycol monoacrylate, stirring and heating for 3 hours at the temperature of 80 ℃, and cooling to room temperature to obtain the environment-friendly drilling fluid lubricant.
The modified plant mucus prepared by the embodiment has the advantages that the polypropylene glycol side chain structure is added, the adsorption effect of the plant mucus on the solid phase surface is improved, the lubrication effect of the plant mucus in the water-based drilling fluid is improved, in addition, excessive polypropylene glycol monoacrylate which cannot be grafted generates a polymerization reaction to generate polypropylene glycol monoacrylate, and the polypropylene glycol monoacrylate and the plant mucus grafted and modified by polypropylene glycol act synergistically to further improve the lubrication effect.
The modified plant mucus is added according to 5 percent of the water-based drilling fluid, the lubricating coefficient of the modified plant mucus in 4 percent bentonite slurry is measured by adopting a GB T16783-1997 water-based drilling fluid field test program, compared with the measured value of 0.12 without the modified plant mucus, the lubricating coefficient is reduced to 0.08, and the lubricating coefficient of the equivalent added modified plant oil lubricant (Xian Changqing chemical group Co., ltd.) is 0.09, which is shown in Table 6.
TABLE 6 Effect of example 7
| Lubricant agent | Coefficient of lubricity |
| 0 | 0.12 |
| 5% modified okra mucilage | 0.08 |
| 5% modified vegetable oil | 0.09 |
The lubricant is added according to 4-10% of the water-based drilling fluid, and the lubrication coefficient of the lubricant in 4% bentonite slurry is determined by adopting a GB T16783-1997 water-based drilling fluid field test program, so that the lubrication coefficient can be reduced by more than 30%.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (8)
1. An environment-friendly drilling fluid lubricant is characterized in that: under alkaline conditions, carrying out graft modification on plant materials containing mucus through polypropylene glycol monoacrylate to obtain modified plant mucus, then carrying out polymerization reaction on the polypropylene glycol monoacrylate under the action of an initiator to generate polypropylene glycol monoacrylate, and forming a lubricant by the modified plant mucus and the polypropylene glycol monoacrylate; wherein the amount of polypropylene glycol monoacrylate is 0.5-5% of the weight of the plant material containing mucilage.
2. The environment-friendly drilling fluid lubricant as claimed in claim 1, wherein: the plant material containing mucus is one or a composition of a plurality of Chinese yam, taro and okra in any proportion.
3. The environment-friendly drilling fluid lubricant as claimed in claim 1, wherein: the polypropylene glycol monoacrylate is one or a composition of any proportion of polypropylene glycol 200 monoacrylate, polypropylene glycol 400 monoacrylate, polypropylene glycol 600 monoacrylate, polypropylene glycol 800 monoacrylate, polypropylene glycol 1000 monoacrylate, polypropylene glycol 1500 monoacrylate, polypropylene glycol 2000 monoacrylate, polypropylene glycol 4000 monoacrylate, polypropylene glycol 6000 monoacrylate, polypropylene glycol 8000 monoacrylate, polypropylene glycol 10000 monoacrylate and polypropylene glycol 20000 monoacrylate with the purity of industrial grade and above.
4. The environment-friendly drilling fluid lubricant as claimed in claim 1, wherein: the initiator is one or a composition of more than one of industrial-grade benzoyl peroxide, lauroyl peroxide, azodiisobutyronitrile and azodiisoheptonitrile with purity higher than that of the industrial-grade benzoyl peroxide, the lauroyl peroxide, the azodiisobutyronitrile and the azodiisoheptonitrile in any proportion.
5. The preparation method of the environment-friendly drilling fluid lubricant as claimed in claim 1, characterized by comprising the following steps:
step 1) mixing plant materials containing mucus with water and pulping to obtain slurry; wherein the amount of water added is 2-5 times of the plant material containing mucilage;
step 2) centrifuging or filtering the slurry to remove insoluble substances, adding an alkali solution into the residual glue solution, stirring and heating at 40-100 ℃ for 1-6h to perform an alkalization reaction; wherein the addition amount of the alkali solution is 1-5% of the weight of the plant material containing mucus;
and 3) adding the polypropylene glycol monoacrylate with the formula amount while stirring, adding an initiator accounting for 1-5% of the mass of the polypropylene glycol monoacrylate, stirring and heating at 60-100 ℃ for 1-6 hours, and cooling to room temperature to obtain the polypropylene glycol acrylate.
6. The method for preparing the environment-friendly drilling fluid lubricant as claimed in claim 5, wherein the method comprises the following steps: the alkali solution in the step 2) is one or a mixture of two of sodium hydroxide solution and potassium hydroxide solution in any proportion.
7. The method for preparing the environment-friendly drilling fluid lubricant as claimed in claim 5, wherein the method comprises the following steps: the mass concentration of the alkali solution in the step 2) is 1-10%.
8. The use of the environment-friendly drilling fluid lubricant as defined in claim 1, wherein: the environment-friendly drilling fluid lubricant is added into the drilling fluid, and the addition amount is 4-10% of the mass of the water-based drilling fluid.
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Citations (4)
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|---|---|---|---|---|
| US5851963A (en) * | 1997-07-21 | 1998-12-22 | O'bryant; Jeffrey Charles | Organic lubricant |
| CN103613702A (en) * | 2013-12-04 | 2014-03-05 | 中科院广州化学有限公司 | Aqueous multi-functional crylic acid extinction resin and preparation method thereof |
| US20160053165A1 (en) * | 2013-08-29 | 2016-02-25 | Halliburton Energy Services, Inc. | Mucilage comprising treatment fluids for subterranean formation operations |
| US10517815B1 (en) * | 2018-10-30 | 2019-12-31 | Peter Angia Pham | Compositions containing plant mucilage |
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2021
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| US5851963A (en) * | 1997-07-21 | 1998-12-22 | O'bryant; Jeffrey Charles | Organic lubricant |
| US20160053165A1 (en) * | 2013-08-29 | 2016-02-25 | Halliburton Energy Services, Inc. | Mucilage comprising treatment fluids for subterranean formation operations |
| CN103613702A (en) * | 2013-12-04 | 2014-03-05 | 中科院广州化学有限公司 | Aqueous multi-functional crylic acid extinction resin and preparation method thereof |
| US10517815B1 (en) * | 2018-10-30 | 2019-12-31 | Peter Angia Pham | Compositions containing plant mucilage |
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| 石宏宇;刘宇宏;路新春;: "生物黏液的润滑特性研究进展", 摩擦学学报, no. 06, pages 117 - 129 * |
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