CN104211075A - Preparation method of organic bentonite for oil based drilling fluid - Google Patents
Preparation method of organic bentonite for oil based drilling fluid Download PDFInfo
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- CN104211075A CN104211075A CN201310218570.3A CN201310218570A CN104211075A CN 104211075 A CN104211075 A CN 104211075A CN 201310218570 A CN201310218570 A CN 201310218570A CN 104211075 A CN104211075 A CN 104211075A
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Abstract
The invention belongs to the technical field of petrochemical engineering, and relates to a preparation method of organic bentonite for oil based drilling fluid. The method is as folows: 55-75 parts of a sodium bentonite dry material is dissolved in 600-900 parts of deionized water for formation of a suspension system a; 20-35 parts of a quaternary ammonium modifying agent is mixed and dissolved in 100-300 parts of a solvent to form a uniform system b; 10-15 parts of an organic additive is dissolved in 100-150 parts of a solvent to form a uniform system c; the solution b is added into the suspension system a to react for 1-2 hours at 70 to 90 DEG C to form a uniform system d; then the solution c is added into the suspension system d to react for 1-2 hours at 70 to 90 DEG C; a product is cooled to room temperature, excess ions in the product are washed away, the product is filtered, finally, the solid product is dried at 60 to 80 DEG C under the vacuum environment, crushed and sieved to obtain the product. The method can greatly improve the performance of the organic bentonite, and the prepared excellent quality organic bentonite for the drilling fluid is conducive to the improvement of drilling fluid rheology, anti filtration performance and cuttings carrying capacity.
Description
Technical field
The invention belongs to petrochemical technology field, relate to drilling fluid organophilic clay technical field, be specifically related to a kind of high-performance method for preparing organobentonite.
Background technology
Wilkinite is to take montmorillonite as main moisture clay pit, molecular formula: Na
x(H
2o)
4(Al
2-Xmg
0.83) Si
4o
10) (OH)
2, because it has special character, as: swelling, cohesiveness, adsorptivity, catalytic, thixotropy, suspension and cationic exchange etc. are applied to various fields.China's bentonite ore resource is very abundant, content is only second to the U.S., occupy second place of the world, but to its deep processing and utilization far away from abroad, always in the Application and Development stage at initial stage, just carried out in recent years the research work of wilkinite deep processing and utilization, organobentonite is exactly one of fine product of wilkinite deep processing.Organobentonite, because it has the characteristic of hydrophobic oleophylic, has good dispersiveness, adds dissolubility and emulsifying property in organic solvent. and be widely used in the industrial circles such as petroleum drilling, paint, ink, high temperature grease, makeup, casting, agricultural chemicals as anti-sedimentation agent, viscosifying agent, tackifier and suspension agent etc.
Organobentonite is the most basic oleophylic colloid in oil base drilling fluid, both can improve viscosity and the shear force of mud in oil base drilling fluid, can reduce again the filter loss of oil base drilling fluid, so organophilic clay is indispensable additive in oil base drilling fluid.Organophilic clay mainly works to increase glutinous carrying in drilling fluid cuts, and the quality of its performance will directly affect rheological and the large rock-carrying ability of drilling fluid.Drilling fluid is in the market the gelation in white oil or diesel oil and increase and glutinously to carry that to cut effect generally poor by organophilic clay, therefore oil base drilling fluid is studied with the preparation of organophilic clay.
Summary of the invention
The object of the invention is to propose a kind of employing high-performance organic modifiers and organic additive and prepare drilling fluid bentonite method.
The inventive method can improve bentonite interlamellar spacing and rheological property for drilling fluid significantly, invents the organobentonite of excellent property, is conducive to improve the rheological of oil base drilling fluid, anti-filtration property and large rock-carrying ability.
Main technical schemes of the present invention: oil base drilling fluid method for preparing organobentonite, is characterized in that comprising:
(1) the sodium bentonite siccative of 55～75 parts is dissolved in deionized water, high-speed stirring, forms suspension system a;
(2) 20～35 parts of quaternary amine organic modifiers is miscible in dehydrated alcohol, stirring and dissolving, forms homogeneous system b;
(3) 10～15 parts of organic additives are dissolved in dehydrated alcohol, stirring and dissolving, forms homogeneous system c;
(4) under whipped state, solution b is joined in suspension system a, and regulation system pH value is 7～8,70～90 ℃ of reactions 1 ~ 2 hour, form homogeneous system d;
(5), under whipped state, solution c is added in suspension system d, 70～90 ℃ of reactions 1 ~ 2 hour;
Above-mentioned sodium bentonite slurries system concentration is 5%～7%; Quaternary amine organic modifiers strength of solution is 10%～30%; Organic additive strength of solution 10%～20%;
The product obtaining in step (5) is cooled to room temperature, washes away ion unnecessary in product, filter, then the solid product of gained be dry, pulverize to 200 mesh sieves under 60～80 ℃ of vacuum environments, obtain organobentonite product.
Described quaternary amine organic modifiers is two stearyl dimethyl benzyl ammonium chlorides; Add-on is 80～120% molar equivalents of sodium bentonite cation exchange capacity.
Described organic additive is polyoxyethylene carboxylate RCOO (CH
2cH
2o) nH(n=9,12,20).
Above-mentioned sodium bentonite is pulverulent mixture, montmorillonite weight percentage >=93%, expansion capacity 85 ~ 95 ml/g.
Embodiment
Below in conjunction with embodiment, further illustrate content of the present invention.
Embodiment 1
The sodium base soil of 50 parts are distributed in 700 parts of deionized waters, and high-speed stirring, obtains stable suspension, adjusts pH value to 7 ~ 8 of suspension, standby; 20 parts of two stearyl dimethyl benzyl ammonium chlorides are dissolved in 300 parts of deionized waters, stir, make it to become the solution for standby of clear.By 10 parts of polyoxyethylene carboxylate RCOO (CH
2cH
2o)
nh(n=9) be dissolved in 100 parts of deionized waters, stir, make it to become the solution for standby of clear.Under high-speed stirring state, two stearyl dimethyl benzyl ammonium chloride solution is added to rapidly in suspension, in the time of 75 ℃, react 1.5 hours, continue to add fat acid polyoxyethylene ester solution, stirring reaction 1 hour.Product is cooled to room temperature, with deionized water, repeatedly removes Cl remaining in product
-, filter, the organobentonite of preparation, at 70 ℃ of vacuum-dryings, pulverizing and mistake 200 mesh sieves, is obtained to organobentonite product.
Embodiment 2
The sodium base soil of 60 parts are distributed in 800 parts of deionized waters, and high-speed stirring, obtains stable suspension, adjusts pH value to 7 ~ 8 of suspension, standby; 22 parts of two stearyl dimethyl benzyl ammonium chlorides are dissolved in 200 parts of ethanol, stir, make it to become the solution for standby of clear.By 11 parts of polyoxyethylene carboxylate RCOO (CH
2cH
2o) nH(n=12) be dissolved in 100 parts of deionized waters, stir, make it to become the solution for standby of clear.Under high-speed stirring state, two stearyl dimethyl benzyl ammonium chloride solution is added to rapidly in suspension, in the time of 70 ℃, react 1.5 hours, continue to add polyoxyethylene carboxylate RCOO (CH
2cH
2o) nH(n=12) solution, stirring reaction 1 hour.Product is cooled to room temperature, with deionized water, repeatedly removes Cl remaining in product
-, filter, the organobentonite of preparation, at 75 ℃ of vacuum-dryings, pulverizing and mistake 200 mesh sieves, is obtained to organobentonite product.
Embodiment 3
The sodium base soil of 65 parts are distributed in 800 parts of deionized waters, and high-speed stirring, obtains stable suspension, adjusts pH value to 7 ~ 8 of suspension, standby; 24.8 parts of two stearyl dimethyl benzyl ammonium chlorides are dissolved in 200 parts of ethanol, stir, make it to become the solution for standby of clear.By 10.5 parts of polyoxyethylene carboxylate RCOO (CH
2cH
2o) nH(n=20) be dissolved in 100 parts of deionized waters, stir, make it to become the solution for standby of clear.Under high-speed stirring state, two stearyl dimethyl benzyl ammonium chloride solution is added to rapidly in suspension, in the time of 70 ℃, react 1.5 hours, continue to add polyoxyethylene carboxylate RCOO (CH
2cH
2o) nH(n=20) solution, reacts 1 hour.Product is cooled to room temperature, with deionized water, repeatedly removes Cl remaining in product
-, filter, the organobentonite of preparation, at 70 ℃ of vacuum-dryings, pulverizing and mistake 200 mesh sieves, is obtained to organobentonite product.
Organobentonite performance is carried out to performance evaluation:
Rheological (normal temperature): take the organophilic clay of 10.5 g, pour into 350ml0 is housed
#the height of diesel oil stirs in cup, under 3000r/min condition, stirs and makes it dispersed, and then high-speed stirring 20 min under 11000r/min measure apparent viscosity, plastic viscosity and yield value at 25 ℃.
Evaluation result is as follows:
As can be seen from the above data: organobentonite prepared by this forwarding method has good rheological property and anti-filtration property in diesel oil.
The performance of organobentonite in oil base drilling fluid system: the organobentonite preparation drilling fluid that uses this forwarding method to prepare, the Performance Detection in oil base drilling fluid system is as follows:
Note: above detection is 1.6g/cm with oil base drilling fluid system density
3.
As can be seen from the above data: organobentonite prepared by this forwarding method has good rheological, anti-filtration property and large rock-carrying ability in drilling fluid.
Claims (6)
1. an oil base drilling fluid method for preparing organobentonite, is characterized in that comprising the following steps:
(1) the sodium bentonite siccative of 55～75 parts is dissolved in deionized water, high-speed stirring, forms suspension system a;
(2) 20～35 parts of quaternary amine organic modifiers is miscible in dehydrated alcohol, stirring and dissolving, forms homogeneous system b;
(3) 10～15 parts of organic additives are dissolved in dehydrated alcohol, stirring and dissolving, forms homogeneous system c;
(4) under whipped state, solution b is joined in suspension system a, and regulation system pH value is 7～8,70～90 ℃ of reactions 1 ~ 2 hour, form homogeneous system d;
(5), under whipped state, solution c is added in suspension system d, 70～90 ℃ of reactions 1 ~ 2 hour;
The product obtaining in step (5) is cooled to room temperature, washes away ion unnecessary in product, filter, then the solid product of gained be dry, pulverize to 200 mesh sieves under 60～80 ℃ of vacuum environments, obtain organobentonite product.
2. preparation method as claimed in claim 1, is characterized in that described quaternary amine organic modifiers is for two stearyl dimethyl benzyl ammonium chlorides; Add-on is 80～120% molar equivalents of sodium bentonite cation exchange capacity.
3. preparation method as claimed in claim 1, is characterized in that described organic additive is polyoxyethylene carboxylate RCOO (CH
2cH
2o) nH(n=9,12,20).
4. preparation method as claimed in claim 1, is characterized in that described sodium bentonite slurries system concentration is 5%～7%; Quaternary amine organic modifiers strength of solution is 10%～30%; Organic additive strength of solution 10%～20%.
5. preparation method as claimed in claim 1, is characterized in that described sodium bentonite is pulverulent mixture, montmorillonite weight percentage 92～99%, expansion capacity 85 ~ 95 ml/g.
6. preparation method as claimed in claim 1, the stir speed (S.S.) in step (1) is 400r/min.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733529A (en) * | 2014-12-11 | 2016-07-06 | 中国石油化工股份有限公司 | Method for preparing organobentonite for white oil based drilling fluid |
| CN106542536A (en) * | 2015-09-16 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of high-performance oil-based drilling fluid method for preparing organobentonite |
| CN109705823A (en) * | 2017-10-25 | 2019-05-03 | 中国石油化工股份有限公司 | Synthetic base drilling fluid method for preparing organobentonite |
| CN109704353A (en) * | 2017-10-25 | 2019-05-03 | 中国石油化工股份有限公司 | Oil resistant base drilling fluid method for preparing organobentonite |
| CN110527500A (en) * | 2018-05-24 | 2019-12-03 | 中国石油化工股份有限公司 | White oil base drilling fluid method for preparing organobentonite |
| CN110835111A (en) * | 2019-12-02 | 2020-02-25 | 浙江树人学院（浙江树人大学） | Preparation process of bentonite for oil-based drilling fluid |
| CN112645342A (en) * | 2019-10-12 | 2021-04-13 | 中石化南京化工研究院有限公司 | Preparation method of organic bentonite for drilling fluid |
| CN112723367A (en) * | 2019-10-28 | 2021-04-30 | 中石化南京化工研究院有限公司 | Preparation method of organic bentonite for environment-friendly drilling fluid |
| CN113336238A (en) * | 2021-06-22 | 2021-09-03 | 中石化南京化工研究院有限公司 | Preparation method of organic soil for high-temperature-resistant water-in-oil drilling fluid |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733529A (en) * | 2014-12-11 | 2016-07-06 | 中国石油化工股份有限公司 | Method for preparing organobentonite for white oil based drilling fluid |
| CN106542536A (en) * | 2015-09-16 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of high-performance oil-based drilling fluid method for preparing organobentonite |
| CN109705823A (en) * | 2017-10-25 | 2019-05-03 | 中国石油化工股份有限公司 | Synthetic base drilling fluid method for preparing organobentonite |
| CN109704353A (en) * | 2017-10-25 | 2019-05-03 | 中国石油化工股份有限公司 | Oil resistant base drilling fluid method for preparing organobentonite |
| CN110527500A (en) * | 2018-05-24 | 2019-12-03 | 中国石油化工股份有限公司 | White oil base drilling fluid method for preparing organobentonite |
| CN112645342A (en) * | 2019-10-12 | 2021-04-13 | 中石化南京化工研究院有限公司 | Preparation method of organic bentonite for drilling fluid |
| CN112723367A (en) * | 2019-10-28 | 2021-04-30 | 中石化南京化工研究院有限公司 | Preparation method of organic bentonite for environment-friendly drilling fluid |
| CN110835111A (en) * | 2019-12-02 | 2020-02-25 | 浙江树人学院（浙江树人大学） | Preparation process of bentonite for oil-based drilling fluid |
| CN110835111B (en) * | 2019-12-02 | 2021-07-09 | 浙江树人学院（浙江树人大学） | Preparation process of bentonite for oil-based drilling fluid |
| CN113336238A (en) * | 2021-06-22 | 2021-09-03 | 中石化南京化工研究院有限公司 | Preparation method of organic soil for high-temperature-resistant water-in-oil drilling fluid |
| CN113336238B (en) * | 2021-06-22 | 2023-11-17 | 中石化南京化工研究院有限公司 | Preparation method of organic soil for high-temperature-resistant water-in-oil drilling fluid |
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Application publication date: 20141217 |