CN105733523A - Graphene lubricant for drilling fluids - Google Patents
Graphene lubricant for drilling fluids Download PDFInfo
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- CN105733523A CN105733523A CN201610062527.6A CN201610062527A CN105733523A CN 105733523 A CN105733523 A CN 105733523A CN 201610062527 A CN201610062527 A CN 201610062527A CN 105733523 A CN105733523 A CN 105733523A
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- drilling fluid
- graphene
- lubricant
- graphite
- drilling
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
Abstract
The invention discloses a graphene lubricant for drilling fluids. The graphene lubricant for drilling fluids comprises the following components in parts by weight: 3-50 parts of graphene, 20-60 parts of ultramicro graphite and 10-45 parts of surfactant. By adding the graphene, the synergistic actions of the graphene and ultramicro graphite can effectively enhance the rheological property of the drilling fluid. The graphene can form a strong reticular structure in the drilling fluid, and the reticular structure can adsorb the well wall and effectively lower the filter loss, thereby being beneficial to the stability of the well wall. The reticular structure adsorbed on the drill bit and drilling tool can reduce the abrasion and prolong the service life of the drill bit and drilling tool. The graphene reticular structure has high strength, and thus, enhances the drill cutting carrying and suspension capacity of the drilling fluid, thereby achieving the goal of better cleaning the well bottom. Due to the addition of the graphene, the nano film is formed in the drilling process, thereby preventing the stratum from being polluted, and enhancing the environment friendliness of the lubricant.
Description
Technical field
The present invention relates to a kind of lubricant for drilling fluids, be specifically related to a kind of drilling fluid Graphene lubricant.
Background technology
Along with horizontal well, high angle hole and the development of extended reach well technology, the lubricity of drilling fluid is required more and more higher by wellbore construction.Fluid lubricant and kollag all can improve the lubricity of drilling fluid, and wherein solid lubricant has plastic beads, glass microballoon, graphite etc..Glass microballoon and plastic beads can roll to reduce friction between contact surface, the lamellar structure of graphite and self lubricity can preferably reduce the coefficient of sliding friction, these solid lubricants can make to produce between drilling rod and sleeve pipe, drilling rod and the contact surface of the borehole wall physical separation, it is not only able to reduce coefficient of friction, and the abrasion of metal can be reduced, it is development in recent years a kind of drilling fluid lubricating material faster.
Chinese patent application CN200910210201.3 discloses a kind of compound type vegetable oil lubricating agent, this lubricant is by vegetable oil, sodium lauryl sulphate, sorbester p17, polyvinylpyrrolidone, sodium carboxymethylcellulose pyce, kollag form, and wherein kollag is serpentine or graphite.The lubricant raw material valency of this invention course of reaction that is easy to get is simple, and prepared lubricant oils dissolubility is good, nontoxic, and fluorescent agent rank is low, and suppression shale hydration expands, and prevents lock of tool drilling from occurring.
Chinese patent application CN201010129810.9 discloses a kind of composite solid lubricant material, this lubricant is with sodium hydrosulfite distillation by-product residue as main component, with be break-in expanded graphite be support materials, the surfactant of animal oil or plant oil base is slip modifiers, and adds fluid loss additive, anti-sloughing agent and emulsifying agent.This invention improves sticking coefficient reduction rate and the coefficient of friction resistance reduction rate of lubricant for drilling fluid simultaneously, and has anti-collapse property.Cheap, production technology is simple.
Chinese patent application CN 201310050766.6 discloses a kind of drilling fluid graphitic lubricant and preparation method thereof, this lubricant mainly includes graphite and surfactant, this lubricant can reduce the lubricating coefficient of drilling fluid, and less on impacts such as the density of drilling fluid, viscosity, filter losses.
In patent disclosed above, all can increase the lubricity of drilling fluid, but the above two constituent kinds are more, increase cost, quality is not easily controlled；Although rear one patent component is few, but it is low to reduce cancellated intensity in filter loss and drilling fluid.
Summary of the invention
Present invention aim at providing that a kind of component is few, lubricity good, reduce drilling fluid filtration, improve the drilling fluid Graphene lubricant of drilling fluid network structure intensity, solve the problem that existing lubricant cost is high, shaft bottom is the most easy to clean.
The present invention is achieved through the following technical solutions:
A kind of drilling fluid Graphene lubricant, including following parts by weight of component: 3-50 parts by weight of graphite alkene, 20-60 weight portion ultra micro graphite, 10-45 parts surfactant.
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 3-50 parts by weight of graphite alkene, 20-60 weight portion ultra micro graphite, 10-45 parts surfactant.
Preferably: 10-40 parts by weight of graphite alkene, 30-50 weight portion ultra micro graphite, 15-40 parts surfactant.
Further preferably: 30-40 parts by weight of graphite alkene, 30-40 weight portion ultra micro graphite, 20-30 parts surfactant.
Wherein, described Graphene is the two dimensional crystal of the only one layer of atomic thickness being stripped out from graphite material, being made up of carbon atom, it can form the strongest network structure in drilling fluid, improves the cancellated intensity of drilling fluid, it is possible to improve drilling fluid carry, the ability of the drilling cuttings that suspends；Be conducive to protection drilling tool and drill bit, improve its service life, it is possible to effectively reduce the filter loss of drilling fluid.
Wherein, described ultra micro graphite is made by graphite fine gtinding；The lamellar structure of ultra micro graphite and self lubricity can reduce the coefficient of sliding friction, it is possible to be effectively improved the rheological characteristic of drilling fluid.
Wherein, described surfactant is during preparing above-mentioned lubricant, it is possible to the interface state in change system, is effectively improved Graphene, ultra micro graphite dispersion in a solvent, improves the uniformity of the lubricant of preparation.
The applicant finds through test of many times: the lubricant of scope of the present invention can effectively improve the rheological characteristic of drilling fluid and reduce lubricating coefficient；Improve the cancellated intensity of drilling fluid, and then protect drilling tool and drill bit raising, improve the service life of drilling tool and drill bit；Effectively reduce filter loss, improve the stability of the borehole wall.
The lubricating coefficient of lubricant of the present invention is at below 0.12Kf, and filter loss can be controlled in below 3.0mL, and cost is below 8000 yuan/ton.
Additionally, lubricant of the present invention is kollag, without mineral oil, it is different from other oil lubricants, environmental nonpollution；Graphene lubricant fall dehydration base reason is to define one layer of nano level seal-off effect thin film; this thin film is used for improving drilling fluid mud cake quality; thus reduce the purpose of drilling fluid dehydration; reduce Free water infiltration in stratum in drilling fluid; avoid water sensitivity oil-gas storage stratum to be contaminated, reservoir protec-tion is had well effect.
Further, Graphene is Graphene powder.
Further, Graphene is to be made by reduction-oxidation graphite.
Further, ultra micro graphite is common ultra micro graphite or modified ultra micro graphite.
Further, modified ultra micro graphite is oxidation ultra micro graphite, inflatable ultra micro graphite and one or more expanded in ultra micro graphite.
Further, during surfactant is cetyl trimethylammonium bromide, oleic acid, potassium oleate, enuatrol, petroleum sodium sulfonate, span 20, sorbester p17, hydrochlorate, acetate, alkyl sulfate and alkylphosphonic one or more.
Further, 8-15 weight portion defoamer is also included.
Described defoamer is during preparing lubricant, it is possible to effectively eliminate the bubble produced in preparation process, improves the uniformity of mixing between each component, and then the uniformity of the lubricant of raising preparation, improves the serviceability of lubricant.
Further, one or more during defoamer is methyl-silicone oil, polyethers, white oil.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, one drilling fluid Graphene lubricant of the present invention, by adding Graphene, Graphene and ultra micro graphite synergism can not only effectively promote the rheological characteristic of drilling fluid, and, Graphene can form the strongest network structure in drilling fluid, the network structure absorption borehole wall effectively reduces filter loss, beneficially wellbore stability；Network structure absorption reduces abrasion on drill bit and drilling tool, increases drill bit and drilling tool service life；The cancellated intensity of Graphene is high, improve drilling fluid carry, the ability of the drilling cuttings that suspends, thus reach the purpose at the bottom of more preferable clear well.
2, Graphene lubricant produces one layer of nano thin-film in drilling process; this thin film can improve drilling fluid mud cake quality; thus reduce the purpose of drilling fluid dehydration; and then Free water infiltration in stratum in reduction drilling fluid; avoid water sensitivity oil-gas storage stratum to be contaminated, reservoir protec-tion is had well effect.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 3 parts by weight of graphite alkene powder, 20 weight portion common ultra micro graphite, 10 weight portion cetyl trimethylammonium bromide.
Embodiment 2:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 50 parts by weight of graphite alkene powder, 60 weight portion oxidation ultra micro graphite, 45 weight portion petroleum sodium sulfonates.
Embodiment 3:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 10 parts by weight of graphite alkene powder, 30 weight portion inflatable ultra micro graphite, 15 weight portion sorbester p17s.
Embodiment 4:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 40 parts by weight of graphite alkene powder, and 50 weight portions expand ultra micro graphite, 40 weight portion alkyl sodium sulfates.
Embodiment 5:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 30 parts by weight of graphite alkene powder, and 30 weight portions expand ultra micro graphite, 35 weight portion alkyl phosphoric acid potassium, 8 weight portion methyl-silicone oils.
Embodiment 6:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 40 parts by weight of graphite alkene powder, and 40 weight portions expand ultra micro graphite, 30 parts by weight of potassium oleate, 15 weight portion polyethers.
Embodiment 7:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 25 parts by weight of graphite alkene powder, 30 weight portion inflatable ultra micro graphite, 25 weight portion sorbester p17s, 10 weight portion white oils.
Embodiment 8:
A kind of drilling fluid Graphene lubricant, is made up of following parts by weight of component: 45 parts by weight of graphite alkene powder, and 50 weight portions expand ultra micro graphite, 45 weight portion enuatrols, 12 weight portion polyethers.
In order to verify the application effect of the present invention, the lubricant of the present invention is applied and in drilling engineering, lubricant described in embodiment 1-embodiment 8 is applied to the oil drilling of areal, the lubricity of lubricant, middle filter pressing vector, density, apparent viscosity and plastic viscosity described in embodiment 1-embodiment 8 are measured；Being measured drilling well liquid-based slurry, measurement result is as shown in table 1 simultaneously:
Table 1
| Density (g/cm3) | Apparent viscosity (mPa.s) | Plastic viscosity (mPa.s) | Middle filter pressing vector (mL) | Extreme boundary lubrication coefficient (Kf) | |
| 2.0g/cm3 drilling well liquid-based is starched | 2.00 | 52 | 39 | 5.6 | 0.199 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 1 sample | 2.01 | 53 | 39 | 2.8 | 0.117 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 2 sample | 2.01 | 55 | 35 | 1.8 | 0.05 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 3 sample | 2.01 | 54 | 39 | 2.2 | 0.08 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 4 sample | 2.01 | 54 | 37 | 1.8 | 0.06 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 5 sample | 2.01 | 54 | 38 | 2.0 | 0.07 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 6 sample | 2.01 | 53 | 36 | 1.8 | 0.06 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 7 sample | 2.01 | 54 | 39 | 2.0 | 0.07 |
| 2.0g/cm3 drilling well liquid-based slurry+2% enforcement row 8 sample | 2.01 | 55 | 37 | 1.8 | 0.05 |
Drawn by table 1:
Add the sample of lubricant described in embodiment 1-embodiment 8 compared with drilling well liquid-based slurry: middle filter pressing vector reduces 2.8mL-3.8mL, and middle filter pressing vector reduction rate is 50%-68%；Extreme boundary lubrication coefficient reduces 0.082-0.149Kf, and extreme boundary lubrication coefficient reduction rate is 41%-75%；And density, apparent viscosity, plastic viscosity are not changed in substantially.Middle filter pressing vector is the index embodying borehole wall stability, and middle filter pressing vector is the lowest, and borehole wall stability is the best；Extreme boundary lubrication coefficient is the index evaluating lubricant, and the rheological characteristic of the best i.e. lubricant of lubricity of extreme boundary lubrication coefficient more low lubricant is the best.
Wherein, use the sample of drilling fluid described in embodiment 1 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.082 Kf, and reduction rate is 41%；Middle filter pressing vector decreases 2.8mL, and reduction rate is 50%；Drilling fluid structural strength (yield value) is increased to 14 mPa by 13 mPa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 2 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.149Kf, and reduction rate is 75%；Middle filter pressing vector decreases 3.8mL, reduction rate 68%；Drilling fluid structural strength (yield value) is increased to 20Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 3 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.119Kf, and reduction rate is 60%；Middle filter pressing vector decreases 3.4mL, and reduction rate is 61%；Drilling fluid structural strength (yield value) is increased to 15Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 4 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.139Kf, and reduction rate is 70%；Middle filter pressing vector decreases 3.8mL, and reduction rate is 68%；Drilling fluid structural strength (yield value) is increased to 17Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 5 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.129Kf, and reduction rate is 65%；Middle filter pressing vector decreases 3.6mL, and reduction rate is 64%；Drilling fluid structural strength (yield value) is increased to 16Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 6 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.139Kf, and reduction rate is 70%；Middle filter pressing vector decreases 3.8mL, and reduction rate is 68%；Drilling fluid structural strength (yield value) is increased to 17Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 7 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.129Kf, and reduction rate is 65%；Middle filter pressing vector decreases 3.6mL, and reduction rate is 64%；Drilling fluid structural strength (yield value) is increased to 15Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Wherein, use the sample of drilling fluid described in embodiment 8 compared with drilling well liquid-based slurry: extreme boundary lubrication coefficient reduces 0.149Kf, and reduction rate is 75%；Middle filter pressing vector decreases 3.8mL, and reduction rate is 68%；Drilling fluid structural strength (yield value) is increased to 18Pa by 13Pa, and shaft bottom cleaning capacity improves, and density, apparent viscosity and plastic viscosity are basically unchanged.
Oil well shaft bottom is detected: use and add the clean level in the shaft bottom of the sample of lubricant described in embodiment 1-embodiment 8 apparently higher than the shaft bottom using drilling well liquid-based slurry simultaneously, this is can to improve drilling fluid network structure intensity and the carrying capacity of landwaste owing to adding the lubricant of Graphene, and then improves the cleanliness factor in shaft bottom.
In sum: the invention provides that a kind of component is few, lubricity good, reduce drilling fluid filtration, improve the drilling fluid Graphene lubricant of drilling fluid network structure intensity, solve the problem that existing lubricant cost is high, shaft bottom is the most easy to clean.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (9)
1. a drilling fluid Graphene lubricant, it is characterised in that include following parts by weight of component: 3-50 parts by weight of graphite alkene, 20-60 weight portion ultra micro graphite, 10-45 parts surfactant.
2. a drilling fluid Graphene lubricant, it is characterised in that be made up of following parts by weight of component: 3-50 parts by weight of graphite alkene, 20-60 weight portion ultra micro graphite, 10-45 parts surfactant.
A kind of drilling fluid Graphene lubricant the most according to claim 1 and 2, it is characterised in that described Graphene is Graphene powder.
A kind of drilling fluid Graphene lubricant the most according to claim 1 and 2, it is characterised in that described Graphene is to be made by reduction-oxidation graphite.
A kind of drilling fluid Graphene lubricant the most according to claim 1 and 2, it is characterised in that described ultra micro graphite is common ultra micro graphite or modified ultra micro graphite.
A kind of drilling fluid Graphene lubricant the most according to claim 5, it is characterised in that described modified ultra micro graphite is oxidation ultra micro graphite, inflatable ultra micro graphite and one or more expanded in ultra micro graphite.
A kind of drilling fluid Graphene lubricant the most according to claim 1 and 2, it is characterized in that, described surfactant is in cetyl trimethylammonium bromide, oleic acid, potassium oleate, enuatrol, petroleum sodium sulfonate, span 20, sorbester p17, hydrochlorate, acetate, alkyl sulfate and alkylphosphonic one or more.
A kind of drilling fluid Graphene lubricant the most according to claim 1, it is characterised in that also include 8-15 weight portion defoamer.
A kind of drilling fluid Graphene lubricant the most according to claim 8, it is characterised in that described defoamer is one or more in methyl-silicone oil, polyethers, white oil.
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| CN201610062527.6A CN105733523A (en) | 2016-01-29 | 2016-01-29 | Graphene lubricant for drilling fluids |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108048050A (en) * | 2017-07-10 | 2018-05-18 | 青岛远大润烯科技有限公司 | A kind of graphitic lubricant and preparation method thereof |
| CN108165248A (en) * | 2018-03-05 | 2018-06-15 | 中国石油大学(华东) | Based on stable strengthening foam system of graphite particle collaboration and preparation method thereof |
| CN108165240A (en) * | 2017-12-29 | 2018-06-15 | 常州市阿曼特化工有限公司 | A kind of preparation method of lubricant for drilling fluid |
| CN108239522A (en) * | 2016-12-27 | 2018-07-03 | 中国石油化工股份有限公司 | A kind of drilling fluid micro-nano closure lubricant and preparation method |
| CN109666460A (en) * | 2017-10-13 | 2019-04-23 | 中国石油化工股份有限公司 | Water-base drilling fluid particle stabilized nanoemulsions lubricant and preparation method thereof |
| CN109666461A (en) * | 2017-10-13 | 2019-04-23 | 中国石油化工股份有限公司 | A kind of drilling fluid drag reducer |
| CN110066645A (en) * | 2018-01-22 | 2019-07-30 | 中国石油化工股份有限公司 | A kind of lubricant for drilling fluid and preparation method thereof |
| CN112226215A (en) * | 2019-07-15 | 2021-01-15 | 中石化石油工程技术服务有限公司 | Lubricating anti-sloughing agent for drilling fluid |
| CN113236204A (en) * | 2021-05-17 | 2021-08-10 | 付万春 | Surface-active graphene and industrial flue gas foam water-control oil-gas displacement method and system |
| CN116103019A (en) * | 2022-10-27 | 2023-05-12 | 中石化石油工程技术服务有限公司 | Two-phase mixed drag reducer for well drilling and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108239522A (en) * | 2016-12-27 | 2018-07-03 | 中国石油化工股份有限公司 | A kind of drilling fluid micro-nano closure lubricant and preparation method |
| CN108048050A (en) * | 2017-07-10 | 2018-05-18 | 青岛远大润烯科技有限公司 | A kind of graphitic lubricant and preparation method thereof |
| CN109666460A (en) * | 2017-10-13 | 2019-04-23 | 中国石油化工股份有限公司 | Water-base drilling fluid particle stabilized nanoemulsions lubricant and preparation method thereof |
| CN109666461A (en) * | 2017-10-13 | 2019-04-23 | 中国石油化工股份有限公司 | A kind of drilling fluid drag reducer |
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| CN112226215A (en) * | 2019-07-15 | 2021-01-15 | 中石化石油工程技术服务有限公司 | Lubricating anti-sloughing agent for drilling fluid |
| CN113236204A (en) * | 2021-05-17 | 2021-08-10 | 付万春 | Surface-active graphene and industrial flue gas foam water-control oil-gas displacement method and system |
| CN113236204B (en) * | 2021-05-17 | 2024-01-26 | 付万春 | Surface active graphene and industrial flue gas foam water control oil gas displacement method and system |
| CN116103019A (en) * | 2022-10-27 | 2023-05-12 | 中石化石油工程技术服务有限公司 | Two-phase mixed drag reducer for well drilling and preparation method thereof |
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