CN103555299B - Method for preparing environment-friendly thickening agent for oil field from persimmon peels and application of thickening agent - Google Patents
Method for preparing environment-friendly thickening agent for oil field from persimmon peels and application of thickening agent Download PDFInfo
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- 235000011511 Diospyros Nutrition 0.000 title claims abstract description 127
- 244000236655 Diospyros kaki Species 0.000 title claims abstract description 97
- 239000002562 thickening agent Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000002245 particle Substances 0.000 claims abstract description 45
- 229920002678 cellulose Polymers 0.000 claims abstract description 30
- 239000001913 cellulose Substances 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 241000723267 Diospyros Species 0.000 claims description 29
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 8
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- 239000001856 Ethyl cellulose Substances 0.000 claims description 4
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 4
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 4
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 4
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 4
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 4
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 4
- 229920001249 ethyl cellulose Polymers 0.000 claims description 4
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 4
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 4
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 4
- 229920000609 methyl cellulose Polymers 0.000 claims description 4
- 239000001923 methylcellulose Substances 0.000 claims description 4
- 235000010981 methylcellulose Nutrition 0.000 claims description 4
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 4
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 4
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 claims description 2
- 230000001965 increasing effect Effects 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 239000003292 glue Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 2
- 241000207199 Citrus Species 0.000 description 1
- 244000055850 Diospyros virginiana Species 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001093 anti-cancer Effects 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 235000020971 citrus fruits Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
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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
- C09K8/035—Organic additives
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- Polysaccharides And Polysaccharide Derivatives (AREA)
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Abstract
由柿子皮制备环保型油田用稠化剂的方法及应用，方法先将自然风干的柿子皮碾压破碎，将柿子皮颗粒在反应釜中加乙醇，浸泡，将处理过的柿子皮颗粒减压过滤，至无溶液流出，干燥至恒重，将改性纤维素制品与干燥至恒重的柿子皮混合，搅拌均匀，粉碎，过筛，得到环保型油田用稠化剂，应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.1-1%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失40-70%，提高粘度100-400%。经改性后的果皮溶解性增强，溶解部分的胶液粘度增大，可以用于做油田生产中钻井液的降滤失剂和增粘剂。The method and application of preparing an environment-friendly oilfield thickener from persimmon skins. The method firstly crushes and crushes naturally air-dried persimmon skins, adds ethanol to the persimmon skin particles in a reaction kettle, soaks them, and decompresses the treated persimmon skin particles Filter until no solution flows out, dry to constant weight, mix the modified cellulose product with persimmon skin dried to constant weight, stir evenly, pulverize, and sieve to obtain an environmentally friendly thickener for oilfields. The thickener used in oilfields is dispersed in water-based drilling fluid with a mass concentration of 0.1-1%. API standards are used to measure its fluid loss reduction and viscosity increasing properties. It reduces fluid loss by 40-70% and increases viscosity by 100- 400%. After modification, the solubility of the peel is enhanced, and the viscosity of the glue solution in the dissolved part is increased, so it can be used as a fluid loss reducer and a viscosifier for drilling fluid in oilfield production.
Description
技术领域 technical field
本发明涉及柑橘皮应用技术领域，具体涉及由柿子皮制备环保型油田用稠化剂的方法及应用。 The invention relates to the technical field of citrus peel application, in particular to a method and application for preparing an environment-friendly oilfield thickener from persimmon peel.
背景技术 Background technique
柿子树是我国广泛种植的一种果树，其果实柿子的营养丰富含有较多的酚类化合物，具有止血、抗菌、活血化瘀、降脂降压、抗氧化、抗癌等多种功效。在柿子的生产加工中，会产生大量的柿子皮，这些柿子皮中含有较多的果胶，还有多酚、还原糖和可溶性糖以及其他小分子化合物。目前大量的柿子皮主要用来生产家禽、家畜的饲料，市场面窄、价格较低。 Persimmon tree is a kind of fruit tree widely planted in my country. Its fruit persimmon is rich in nutrition and contains more phenolic compounds, which has various effects such as hemostasis, antibacterial, blood circulation and blood stasis removal, lipid-lowering and blood pressure reduction, anti-oxidation, and anti-cancer. In the production and processing of persimmons, a large amount of persimmon skins will be produced, which contain more pectin, polyphenols, reducing and soluble sugars, and other small molecular compounds. At present, a large number of persimmon skins are mainly used to produce feed for poultry and livestock, and the market is narrow and the price is relatively low.
发明内容 Contents of the invention
为了扩大柿子皮的用途，提高其附加值，本发明的目的在于提供由柿子皮制备环保型油田用稠化剂的方法及应用，经改性后的的果皮溶解性增强，溶解部分的胶液粘度增大，可以用于做油田生产中钻井液的降滤失剂和增粘剂。 In order to expand the use of persimmon peel and increase its added value, the object of the present invention is to provide a method and application for preparing an environment-friendly oilfield thickener from persimmon peel. The modified peel has enhanced solubility and dissolved part of the glue Viscosity increases, it can be used as fluid loss reducer and viscosifier for drilling fluid in oilfield production.
为了达到上述目的，本发明采用的技术方案为： In order to achieve the above object, the technical scheme adopted in the present invention is:
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加5-20倍质量的乙醇，30-60℃下浸泡30min以上，乙醇为工业级以上纯度的产品； In the second step, add 5-20 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, soak at 30-60°C for more than 30 minutes, and the ethanol is a product with a purity above industrial grade;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，50-80℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 50-80°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为10:1 -1:10混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级以上纯度的甲基纤维素、乙基纤维素、羟乙基纤维素、羟丙基纤维素、羧甲基纤维素或羧甲基纤维素钠。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight according to the mass ratio of 10:1-1:10, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly oilfield thickened The modified cellulose products used are methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose or sodium carboxymethyl cellulose with a purity above industrial grade.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.1-1%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失40-70%，提高粘度100-400%。 In application, the environment-friendly oilfield thickener is dispersed in the water-based drilling fluid with a mass concentration of 0.1-1%, and the API standard is used to measure its fluid loss reduction and viscosity increasing properties, and the fluid loss can be reduced by 40-70% , Increase the viscosity by 100-400%.
由于本发明采用了柿子皮和改性纤维素为原料，具有天然的环保性和可再生性，易于生物降解，果皮中含有的果胶和多酚类物质有利于提高其增粘作用，增强了其与钻井液中粘土颗粒表面的吸附作用，同时细小的颗粒可以起到堵塞泥饼中的细小孔道，有利于提高其降滤失作用。 Because the present invention adopts persimmon peel and modified cellulose as raw materials, it has natural environmental protection and reproducibility, and is easy to biodegrade. It has an adsorption effect on the surface of clay particles in the drilling fluid, and at the same time, the fine particles can block the small pores in the mud cake, which is beneficial to improve its fluid loss reduction effect.
具体实施方式 detailed description
下面结合具体实施例对本发明作进一步描述。 The present invention will be further described below in conjunction with specific embodiments.
实施例1 Example 1
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加5倍质量的乙醇，60℃下浸泡60min，乙醇为工业级产品； In the second step, add 5 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, soak for 60 minutes at 60°C, and the ethanol is an industrial grade product;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，50℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 50°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为1：1混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级甲基纤维素。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight at a mass ratio of 1:1, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly thickener for oilfields. The permanent cellulose product is industrial grade methyl cellulose.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.5%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失55%，提高粘度160%。 In application, the environment-friendly thickener for oilfields is dispersed in water-based drilling fluid with a mass concentration of 0.5%. API standards are used to measure its fluid loss reduction and viscosity increasing properties, reducing fluid loss by 55% and increasing viscosity by 160% %.
实施例2 Example 2
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加5倍质量的乙醇，50℃下浸泡60min，乙醇为工业级产品； In the second step, add 5 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, and soak for 60 minutes at 50°C. The ethanol is an industrial grade product;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，60℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 60°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为1：2混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级羧甲基纤维素。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight at a mass ratio of 1:2, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly thickener for oilfields. The permanent cellulose product is industrial grade carboxymethyl cellulose.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.5%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失45%，提高粘度120%。 In application, the environment-friendly oilfield thickener is dispersed in the water-based drilling fluid with a mass concentration of 0.5%, and the fluid loss reduction and viscosity increase are measured by API standards, reducing fluid loss by 45% and increasing viscosity by 120% %.
实施例3 Example 3
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加10倍质量的乙醇，50℃下浸泡45 min，乙醇为工业级产品； In the second step, add 10 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, soak for 45 minutes at 50°C, and the ethanol is an industrial grade product;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，60℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 60°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为1：7混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级羧甲基纤维素钠。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight at a mass ratio of 1:7, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly thickener for oilfields. The permanent cellulose product is industrial grade sodium carboxymethyl cellulose.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.8%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失55%，提高粘度300%。 In application, the environment-friendly oilfield thickener is dispersed in the water-based drilling fluid with a mass concentration of 0.8%, and the API standard is used to measure its fluid loss reduction and viscosity increasing properties, reducing fluid loss by 55% and increasing viscosity by 300% %.
实施例4 Example 4
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加15倍质量的乙醇，60℃下浸泡30min，乙醇为工业级产品； In the second step, add 15 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, and soak for 30 minutes at 60°C. The ethanol is an industrial grade product;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，70℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 70°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为8：1混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级羟乙基纤维素。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight at a mass ratio of 8:1, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly thickener for oilfields. The permanent cellulose product is industrial grade hydroxyethyl cellulose.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.6%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失50%，提高粘度320%。 In application, the environment-friendly oilfield thickener is dispersed in the water-based drilling fluid with a mass concentration of 0.6%, and the API standard is used to measure its fluid loss reduction and viscosity increasing properties, reducing fluid loss by 50% and increasing viscosity by 320 %.
实施例5 Example 5
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加20倍质量的乙醇，35℃下浸泡45 min，乙醇为工业级产品； In the second step, add 20 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, soak for 45 minutes at 35°C, and the ethanol is an industrial grade product;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，50℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 50°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为1：10混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级羟丙基纤维素。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight at a mass ratio of 1:10, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly thickener for oilfields. The permanent cellulose product is industrial grade hydroxypropyl cellulose.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为1%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失55%，提高粘度400%。 When applied, the environment-friendly oilfield thickener is dispersed in the water-based drilling fluid, and its mass concentration is 1%. The API standard is used to measure its fluid loss reduction and viscosity increase. It reduces the fluid loss by 55% and increases the viscosity by 400. %.
实施例6 Example 6
由柿子皮制备环保型油田用稠化剂的方法，包括以下步骤： The method for preparing environment-friendly thickener for oil field by persimmon skin comprises the following steps:
第一步，将自然风干的柿子皮碾压破碎至直径1-5mm的颗粒，柿子皮为柿子制作柿饼之后的剩余物； In the first step, the naturally air-dried persimmon skin is crushed to particles with a diameter of 1-5mm, and the persimmon skin is the residue after making persimmons from persimmons;
第二步，将上述柿子皮颗粒在反应釜中加8倍质量的乙醇，55℃下浸泡50min，乙醇为工业级产品； In the second step, add 8 times the mass of ethanol to the above-mentioned persimmon skin particles in the reaction kettle, and soak for 50 minutes at 55°C. The ethanol is an industrial grade product;
第三步，将上述处理过的柿子皮颗粒减压过滤，至无溶液流出，65℃干燥至恒重； The third step is to filter the above-mentioned treated persimmon skin particles under reduced pressure until no solution flows out, and dry at 65°C to constant weight;
第四步，将改性纤维素制品与干燥至恒重的柿子皮按照质量比为5：1混合，搅拌均匀，粉碎，过120-200目筛，得到环保型油田用稠化剂，所用改性纤维素制品为工业级乙基纤维素。 The fourth step is to mix the modified cellulose product with the persimmon skin dried to constant weight at a mass ratio of 5:1, stir evenly, pulverize, and pass through a 120-200 mesh sieve to obtain an environmentally friendly thickener for oilfields. The permanent cellulose product is industrial grade ethyl cellulose.
应用时，将环保型油田用稠化剂分散于水基钻井液中，其质量浓度为0.6%的溶液，采用API标准测定其降滤失性和增粘性，降低滤失60%，提高粘度400%。 In application, the environment-friendly oilfield thickener is dispersed in the water-based drilling fluid with a mass concentration of 0.6%, and the API standard is used to measure its fluid loss reduction and viscosity increasing properties, reducing fluid loss by 60% and increasing viscosity by 400% %.
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