CN111690385A - Filtrate reducer lignite resin for drilling fluid and preparation method thereof - Google Patents
Filtrate reducer lignite resin for drilling fluid and preparation method thereof Download PDFInfo
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- CN111690385A CN111690385A CN202010614775.3A CN202010614775A CN111690385A CN 111690385 A CN111690385 A CN 111690385A CN 202010614775 A CN202010614775 A CN 202010614775A CN 111690385 A CN111690385 A CN 111690385A
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- 239000003077 lignite Substances 0.000 title claims abstract description 57
- 238000005553 drilling Methods 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 title claims abstract description 44
- 229920005989 resin Polymers 0.000 title claims abstract description 39
- 239000011347 resin Substances 0.000 title claims abstract description 39
- 239000000706 filtrate Substances 0.000 title claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims description 17
- 239000000654 additive Substances 0.000 claims abstract description 19
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920002261 Corn starch Polymers 0.000 claims abstract description 17
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000008120 corn starch Substances 0.000 claims abstract description 17
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 17
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 16
- 230000000996 additive effect Effects 0.000 claims abstract description 16
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000006116 polymerization reaction Methods 0.000 claims description 25
- 238000006460 hydrolysis reaction Methods 0.000 claims description 24
- 238000001556 precipitation Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 20
- 230000035484 reaction time Effects 0.000 claims description 15
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical group [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical group [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 9
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 9
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 9
- 238000001694 spray drying Methods 0.000 claims description 9
- 239000006228 supernatant Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 14
- 230000009467 reduction Effects 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 230000015784 hyperosmotic salinity response Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- CZFMLDUNXATLOW-XKZIYDEJSA-N (5z)-5-[[3-(2-hydroxyethoxymethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical group C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1COCCO CZFMLDUNXATLOW-XKZIYDEJSA-N 0.000 description 1
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- -1 sulfomethyl phenolic resin Chemical compound 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The application provides a filtrate reducer lignite resin for drilling fluid, which relates to the technical field of drilling fluid additives and comprises the following components in parts by weight: 50-60 parts of lignite, 1-5 parts of corn starch, 5-15 parts of phenol, 10-20 parts of formaldehyde, 5-10 parts of an alkalizer, 4-8 parts of polyethylene glycol, 10-15 parts of acrylonitrile and 3-6 parts of a catalyst; the additive has good temperature resistance and salt resistance, further improves the value of the product, has small addition amount and obvious fluid loss reduction effect, and can generate excellent fluid loss reduction performance only by adding 1.0 percent of base slurry.
Description
Technical Field
The application relates to the technical field of drilling fluid additives, in particular to a filtrate reducer lignite resin for drilling fluid and a preparation method thereof.
Background
The drilling fluid is blood for drilling, the chemical agent for the drilling fluid is an important component of the drilling fluid, wherein the fluid loss agent is taken as an important chemical agent and is widely added into the drilling fluid, and the lignite resin is an organic polymer obtained by taking lignite as a raw material and carrying out a series of chemical treatments. Lignite is a mineral coal with the lowest coalification degree, is also a brownish black and dull low-grade coal between peat and bituminous coal, has strong chemical reactivity, is easy to weather in air, is difficult to store and transport remotely, has serious pollution to air during combustion, contains 20-80% of humic acid, is difficult to dissolve in water, can chemically react with alkali to generate water-soluble humate, and is mainly used for a high-temperature resistant petroleum drilling fluid filtrate reducer, heavy metal adsorption resin, water-absorbent resin and the like.
At present, sulfomethyl phenolic resin and hydrolyzed polyacrylonitrile are commonly used in drilling fluid as raw materials, and the lignite resin filtrate reducer is produced by extracting, deslagging and concentrating lignite. However, such fluid loss additives present the following major problems: poor thermal stability and no high temperature resistance; the salt resistance is poor, so that the drilling fluid is easily polluted by soluble salt, and the use efficiency of the drilling fluid is reduced; the fluid loss reducing effect is not obvious, and the fluid loss reducing performance can be achieved only by adding a large amount of products;
meanwhile, there are some lignite resins for drilling fluid which have excellent filtrate reduction performance, outstanding stability and salt resistance, for example, chinese patent application CN 201711335513.8-a lignite resin for drilling fluid and a production process thereof, in the process of preparing lignite resin, all reactions are in one reaction kettle, which is not beneficial to quality inspection and timely and accurate detection of production process of products by production personnel and related quality control operation; the reacted materials are directly discharged into a material storage tank, the materials can emit trace smell, the difficulty is increased during collection and treatment, and the moisture and the fineness of the product cannot meet the technical index requirements easily after the materials are dried by a scraper type dryer.
Content of application
The first purpose of the application is to provide a fluid loss additive lignite resin for drilling fluid, which has good temperature resistance and salt tolerance, so that the value of a product is improved, the addition amount is small, the fluid loss reducing effect is obvious, and only 1.0% of base slurry is added to generate excellent fluid loss reducing performance.
The second objective of the application is to provide a preparation method of the filtrate reducer lignite resin for the drilling fluid, wherein the alkalization reaction and the hydrolysis reaction are separately performed, so that the control and detection of related index requirements are facilitated, and then the materials after the alkalization reaction and the hydrolysis reaction are fed into another kettle again for polymerization reaction, so that the handling control of a quality inspector on the production process of the product is facilitated.
The embodiment of the application is realized by the following technical scheme:
a fluid loss additive lignite resin for drilling fluid comprises the following components in parts by weight: 50-60 parts of lignite, 1-5 parts of corn starch, 5-15 parts of phenol, 10-20 parts of formaldehyde, 5-10 parts of an alkalizer, 4-8 parts of polyethylene glycol, 10-15 parts of acrylonitrile and 3-6 parts of a catalyst.
Further, the components of the composition by weight portion comprise: 53-57 parts of lignite, 2-4 parts of corn starch, 8-12 parts of phenol, 13-17 parts of formaldehyde, 6-9 parts of an alkalizer, 5-7 parts of polyethylene glycol, 11-14 parts of acrylonitrile and 4-5 parts of a catalyst.
Further, the components of the composition by weight portion comprise: 55 parts of lignite, 3 parts of corn starch, 10 parts of phenol, 15 parts of formaldehyde, 7.5 parts of an alkalizer, 6 parts of polyethylene glycol, 12.5 parts of acrylonitrile and 4.5 parts of a catalyst.
Further, the alkalizer is potassium hydroxide or sodium hydroxide.
Further, the catalyst is sodium metabisulfite.
The preparation method of the filtrate reducer lignite resin for the drilling fluid comprises the following preparation steps:
s1, alkalization reaction: putting lignite, corn starch, an alkalizer and water into a stirring tank for reaction, and stirring continuously;
s2, hydrolysis reaction: putting acrylonitrile, phenol, formaldehyde, a catalyst and water into a hydrolysis reaction kettle for hydrolysis reaction with intermittent stirring;
s3, polymerization reaction: discharging the solutions prepared in the steps S1 and S2 into a polymerization reaction kettle, and simultaneously adding polyethylene glycol into the polymerization reaction kettle to perform polymerization reaction;
s4, precipitation: discharging the substances in the polymerization reaction kettle to a precipitation tank for precipitation;
s5, powder preparation: and after the precipitation is finished, discharging the supernatant in the precipitation tank into a centrifugal spray drying tower for drying and powdering.
Further, in the step S1, the reaction temperature is 70-90 ℃, and the reaction time is 10-20 min.
Further, in the step S2, the reaction temperature is 70-90 ℃, the interval time of intermittent stirring is 30min, and the reaction is finished after 2-3 times of stirring.
Further, in the step S3, the reaction temperature is 70-90 ℃, and the reaction time is 60-90 min.
Further, in the step S4, the precipitation time is 2h, and the temperature of the supernatant is controlled to be 30-35 ℃.
The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:
the application provides a fluid loss additive lignite resin for drilling fluid, has good temperature resistance and salt tolerance, and then has promoted the value of product, and the addition is little, and the fluid loss effect is showing, only adds 1.0% of base stock can produce good fluid loss performance, and it is in the preparation process, is suitable for adopting centrifugal spray drier to dry.
According to the preparation method of the filtrate reducer lignite resin for the drilling fluid, the alkalization reaction and the hydrolysis reaction are separately carried out. The alkalization reaction time is short, the alkalization reaction time is long, the hydrolysis reaction time is long, the alkalization reaction time and the hydrolysis reaction time are carried out in a stirring tank, the control and detection of related index requirements are facilitated, then the alkalization reaction and the hydrolysis reaction are carried out in another kettle again, the control of a quality testing worker on the production process of a product is facilitated, then the material after the polymerization reaction enters a precipitation tank for precipitation, the precipitated material is pumped into a centrifugal spray drying tower for drying through an extraction pump, the moisture of the dried material can be controlled within 10% completely, and meanwhile, other crushing operations are not needed, so that the fineness of the product can reach the standard; can be directly packaged and put in storage.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a fluid loss additive lignite resin production system for drilling fluid provided by embodiment 1 of the present application;
icon: 1-a stirring tank, 2-a hydrolysis reaction kettle, 3-a mixing kettle, 4-a polymerization reaction kettle, 5-a settling tank, 6-a heat preservation kettle and 7-a centrifugal spray drying tower.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The fluid loss additive lignite resin for drilling fluid and the preparation method thereof provided by the embodiment of the invention are specifically explained below.
A fluid loss additive lignite resin for drilling fluid comprises the following components in parts by weight: 50-60 parts of lignite, 1-5 parts of corn starch, 5-15 parts of phenol, 10-20 parts of formaldehyde, 5-10 parts of an alkalizer, 4-8 parts of polyethylene glycol, 10-15 parts of acrylonitrile and 3-6 parts of a catalyst; wherein the alkalizer is potassium hydroxide or sodium hydroxide, preferably sodium hydroxide; the catalyst is sodium metabisulfite.
The filtrate reducer lignite resin for the drilling fluid has good temperature resistance and salt tolerance, further improves the value of a product, has small addition amount and obvious filtrate reduction effect, can generate excellent filtrate reduction performance by only adding 1.0% of base slurry, and is suitable for being dried by adopting a centrifugal spray drying tower in the preparation process.
A preparation method of the filtrate reducer lignite resin for the drilling fluid comprises the following preparation steps:
s1, alkalization reaction: putting lignite, corn starch, an alkalizer and 40-60 parts of water into a stirring tank for reaction, and stirring continuously; the reaction temperature is 70-90 ℃, and the reaction time is 10-20 min;
s2, hydrolysis reaction: putting acrylonitrile, phenol, formaldehyde, a catalyst and 40-60 parts of water into a hydrolysis reaction kettle for hydrolysis reaction with intermittent stirring; the reaction temperature is 70-90 ℃, the interval time of intermittent stirring is 30min, and the reaction is finished after 2-3 times of stirring, in other words, the reaction time is 60-90 min.
S3, polymerization reaction: discharging the solutions prepared in the steps S1 and S2 into a polymerization reaction kettle, and simultaneously adding polyethylene glycol into the polymerization reaction kettle to perform polymerization reaction; the reaction temperature is 70-90 ℃, the reaction time is 60-90 min, and specifically, the polymerization reaction kettle comprises two reaction kettles connected in parallel;
s4, precipitation: discharging the substances in the polymerization reaction kettle to a precipitation tank for precipitation; the precipitation time is 2 hours, the temperature of the supernatant is controlled to be 30-35 ℃, and specifically, the supernatant can be stored in a heat preservation kettle;
s5, powder preparation: and after the precipitation is finished, discharging supernatant liquor in the precipitation tank into the top of a centrifugal spray drying tower, starting a drying procedure, discharging and drying, drying to prepare powder, collecting materials into a finished product storage tank through a closed screw conveyor, filling workers into a packaging bag, sealing, and conveying the materials to a finished product warehouse for storage.
It should be noted that, the addition of each material is performed by using an automatic metering control system.
The preparation method separates the alkalization reaction and the hydrolysis reaction. The alkalization reaction time is short, the alkalization reaction time is long when the alkalization reaction is carried out in a stirring tank, the hydrolysis reaction time is long, the alkalization reaction and the hydrolysis reaction are carried out in a kettle, the control and the detection of related index requirements are facilitated, then the alkalization reaction and the hydrolysis reaction are carried out in another kettle again, the control of a quality testing worker on the production process of a product is facilitated, then the material after the polymerization reaction is precipitated in a precipitation tank, the precipitated dregs are removed, the material enters a drying tower for drying, the moisture of the dried material can be controlled within 10% completely, and the fineness can reach the standard more favorably; the materials are not required to be crushed again, and the discharged materials completely meet the requirements of relevant indexes and can be directly packaged and warehoused.
The production system of the filtrate reducer lignite resin for the drilling fluid comprises a stirring tank 1, a hydrolysis reaction kettle 2, a polymerization reaction kettle 4, a settling tank 5 and a centrifugal spray drying tower 7, wherein the stirring tank 1 and the hydrolysis reaction kettle 2 are respectively communicated with the polymerization reaction kettle 4, the settling tank 5 and the centrifugal spray drying tower 7 are sequentially communicated, and the optional polymerization reaction kettle 4 can comprise a plurality of reaction kettles which are connected in parallel.
In order to make the material that the reaction prepared in agitator tank 1 and the material that the reaction prepared in the hydrolysis reaction cauldron have better mixing after polymerization, in this embodiment, still including mixing kettle 3, mixing kettle 3 communicates with agitator tank 1 and hydrolysis reaction cauldron 2 respectively, and polymerization kettle 4 locates mixing kettle 3 rear end and communicates with mixing kettle 3.
In order to ensure the drying of the material, the supernatant of the settling tank 5 needs to be insulated, and therefore, in this embodiment, the device further comprises an insulation kettle 6, and the insulation kettle 6 is connected in series between the settling tank 5 and the centrifugal spray drying tower 7.
Example 1
A filtrate reducer lignite resin for drilling fluid comprises the following components in parts by weight: 50 parts of lignite, 1 part of corn starch, 5 parts of phenol, 10 parts of formaldehyde, 5 parts of potassium hydroxide, 4 parts of polyethylene glycol, 10 parts of acrylonitrile and 3 parts of sodium metabisulfite.
Example 2
A filtrate reducer lignite resin for drilling fluid comprises the following components in parts by weight: 50 parts of lignite, 1 part of corn starch, 5 parts of phenol, 10 parts of formaldehyde, 5 parts of sodium hydroxide, 4 parts of polyethylene glycol, 10 parts of acrylonitrile and 3 parts of sodium metabisulfite.
Example 3
A filtrate reducer lignite resin for drilling fluid comprises the following components in parts by weight: 60 parts of lignite, 5 parts of corn starch, 15 parts of phenol, 20 parts of formaldehyde, 10 parts of sodium hydroxide, 8 parts of polyethylene glycol, 15 parts of acrylonitrile and 6 parts of sodium metabisulfite.
Example 4
A filtrate reducer lignite resin for drilling fluid comprises the following components in parts by weight: 53 parts of lignite, 2 parts of corn starch, 8 parts of phenol, 13 parts of formaldehyde, 6 parts of sodium hydroxide, 5 parts of polydiethylene alcohol, 11 parts of acrylonitrile and 4 parts of sodium metabisulfite.
Example 5
A filtrate reducer lignite resin for drilling fluid comprises the following components in parts by weight: 57 parts of lignite, 4 parts of corn starch, 12 parts of phenol, 17 parts of formaldehyde, 9 parts of sodium hydroxide, 7 parts of polyethylene glycol, 14 parts of acrylonitrile and 5 parts of sodium metabisulfite.
Example 6
A filtrate reducer lignite resin for drilling fluid comprises the following components in parts by weight: 55 parts of lignite, 3 parts of corn starch, 10 parts of phenol, 15 parts of formaldehyde, 7.5 parts of sodium hydroxide, 6 parts of polyethylene glycol, 12.5 parts of acrylonitrile and 4.5 parts of sodium metabisulfite.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A filtrate reducer lignite resin for drilling fluid is characterized in that: the components of the composition by weight portion are as follows: 50-60 parts of lignite, 1-5 parts of corn starch, 5-15 parts of phenol, 10-20 parts of formaldehyde, 5-10 parts of an alkalizer, 4-8 parts of polyethylene glycol, 10-15 parts of acrylonitrile and 3-6 parts of a catalyst.
2. The fluid loss additive lignite resin for drilling fluid according to claim 1, wherein: the components of the composition by weight portion are as follows: 53-57 parts of lignite, 2-4 parts of corn starch, 8-12 parts of phenol, 13-17 parts of formaldehyde, 6-9 parts of an alkalizer, 5-7 parts of polyethylene glycol, 11-14 parts of acrylonitrile and 4-5 parts of a catalyst.
3. The fluid loss additive lignite resin for drilling fluid according to claim 2, wherein: the components of the composition by weight portion are as follows: 55 parts of lignite, 3 parts of corn starch, 10 parts of phenol, 15 parts of formaldehyde, 7.5 parts of an alkalizer, 6 parts of polyethylene glycol, 12.5 parts of acrylonitrile and 4.5 parts of a catalyst.
4. The fluid loss additive lignite resin for drilling fluid according to claim 1, wherein: the alkalizer is potassium hydroxide or sodium hydroxide.
5. The fluid loss additive lignite resin for drilling fluid according to claim 1, wherein: the catalyst is sodium metabisulfite.
6. A method for preparing a fluid loss additive lignite resin for drilling fluid according to any one of claims 1 to 5, wherein the method comprises the following steps: the preparation steps are as follows:
s1, alkalization reaction: putting lignite, corn starch, an alkalizer and water into a stirring tank for reaction, and stirring continuously;
s2, hydrolysis reaction: putting acrylonitrile, phenol, formaldehyde, a catalyst and water into a hydrolysis reaction kettle for hydrolysis reaction with intermittent stirring;
s3, polymerization reaction: discharging the solutions prepared in the steps S1 and S2 into a polymerization reaction kettle, and simultaneously adding polyethylene glycol into the polymerization reaction kettle to perform polymerization reaction;
s4, precipitation: discharging the substances in the polymerization reaction kettle to a precipitation tank for precipitation;
s5, powder preparation: and after the precipitation is finished, discharging the supernatant in the precipitation tank into a centrifugal spray drying tower for drying and powdering.
7. The method for preparing the fluid loss additive lignite resin for the drilling fluid as claimed in claim 6, wherein the method comprises the following steps: in the step S1, the reaction temperature is 70-90 ℃, and the reaction time is 10-20 min.
8. The method for preparing the fluid loss additive lignite resin for the drilling fluid as claimed in claim 6, wherein the method comprises the following steps: in the step S2, the reaction temperature is 70-90 ℃, the interval time of intermittent stirring is 30min, and the reaction is finished after 2-3 times of stirring.
9. The method for preparing the fluid loss additive lignite resin for the drilling fluid as claimed in claim 6, wherein the method comprises the following steps: in the step S3, the reaction temperature is 70-90 ℃, and the reaction time is 60-90 min.
10. The method for preparing the fluid loss additive lignite resin for the drilling fluid as claimed in claim 6, wherein the method comprises the following steps: in the step S4, the precipitation time is 2h, and the temperature of the supernatant is controlled at 30-35 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112029486A (en) * | 2020-11-03 | 2020-12-04 | 胜利油田钻井飞龙泥浆技术服务有限公司 | Preparation method of environment-friendly degradable high-temperature-resistant salt-resistant anti-collapse filtrate reducer |
| CN116355599A (en) * | 2023-06-01 | 2023-06-30 | 四川巨正科技有限公司 | Environment-friendly lignite resin for drilling fluid and preparation method thereof |
| CN116589989A (en) * | 2023-05-31 | 2023-08-15 | 萍乡市汇鑫化工科技有限公司 | A kind of preparation method of anti-slump fluid loss reducing agent for drilling fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112029486A (en) * | 2020-11-03 | 2020-12-04 | 胜利油田钻井飞龙泥浆技术服务有限公司 | Preparation method of environment-friendly degradable high-temperature-resistant salt-resistant anti-collapse filtrate reducer |
| CN116589989A (en) * | 2023-05-31 | 2023-08-15 | 萍乡市汇鑫化工科技有限公司 | A kind of preparation method of anti-slump fluid loss reducing agent for drilling fluid |
| CN116355599A (en) * | 2023-06-01 | 2023-06-30 | 四川巨正科技有限公司 | Environment-friendly lignite resin for drilling fluid and preparation method thereof |
| CN116355599B (en) * | 2023-06-01 | 2023-08-08 | 四川巨正科技有限公司 | A kind of lignite resin for environment-friendly drilling fluid and preparation method thereof |
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Application publication date: 20200922 |