CN112029485A - Compound medium molecular sulfonate filtrate reducer and preparation method thereof - Google Patents
Compound medium molecular sulfonate filtrate reducer and preparation method thereof Download PDFInfo
- Publication number
- CN112029485A CN112029485A CN202011206465.4A CN202011206465A CN112029485A CN 112029485 A CN112029485 A CN 112029485A CN 202011206465 A CN202011206465 A CN 202011206465A CN 112029485 A CN112029485 A CN 112029485A
- Authority
- CN
- China
- Prior art keywords
- parts
- kneading
- reaction
- water
- kneader
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
-
- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Polyethers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a compound medium-molecular sulfonate filtrate reducer and a preparation method thereof, relating to the technical field of petroleum drilling aids and comprising the following steps: and (3) starch puffed material synthesis: adding corn starch, water and strong base into a kneading machine for kneading reaction, adding acetic acid into the kneading machine for reaction, and kneading reactants into particles; kneading waste silk: adding waste acrylic fiber, water and strong base into a kneading machine for reaction, and kneading reactants into rubble particles; copolymerization of sulfonate: adding AMPS, polyhydroxy amine polyether and water into a kneader for reaction; adding an initiator into the kneader, carrying out an implosion reaction, and kneading the reactants into a honeycomb solid; putting the product into stirring equipment, adding the high-temperature stabilizer into a stirrer, stopping stirring until no moisture is evaporated, and performing coarse crushing and fine grinding to obtain a finished product. No waste gas and waste residue, high utilization rate of raw materials, no secondary pollution, low cost, good salt resistance, no viscosity increase and improved rheological property.
Description
Technical Field
The invention relates to the technical field of petroleum drilling additives, in particular to a compound medium molecular sulfonate filtrate reducer and a preparation method thereof.
Background
The single plant starch-containing drilling mud treating agent developed in China in the eighties is prepared into a product through a simple alkalization polymerization process route, and although the product performance plays a certain role, the temperature resistance effect is poor, and the salt resistance performance is also poor, so that the single plant starch-containing drilling mud treating agent is not widely applied.
The salt resistance effect of the sulfonate copolymer fluid loss additive on the market is obviously improved, but the cost is high, the production process difficulty is high, and the popularization and the use are not wide.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a compound medium molecular sulfonate filtrate reducer which does not produce waste gas and waste residues, has high raw material utilization rate, does not form secondary pollution, has low cost and good salt resistance, does not tackify and can improve rheological property.
The invention also provides a preparation method of the compound medium molecular sulfonate filtrate reducer.
The technical scheme of the invention is as follows: a compound medium-molecular sulfonate filtrate reducer is composed of the following raw materials in parts by weight:
25-48 parts of corn starch;
15-25 parts of AMPS;
16-28 parts of acrylic fiber waste silk;
60-80 parts of water;
10-23 parts of strong base;
15-25 parts of polyhydroxy amine polyether;
5-10 parts of acetic acid;
0.1-2 parts of an initiator;
2-5 parts of a high-temperature stabilizer.
Preferably, the feed consists of the following raw materials in parts by weight:
35 parts of corn starch;
20 parts of AMPS;
20 parts of acrylic fiber waste silk;
70 parts of water;
15 parts of strong base;
20 parts of polyhydroxy amine polyether;
7 parts of acetic acid;
1.3 parts of an initiator;
3 parts of a high-temperature stabilizer.
Preferably, the initiator is sodium persulfate.
Preferably, the high-temperature stabilizer is sodium sulfite.
Preferably, the strong base is NaOH.
The invention also provides a method for preparing the compound medium-molecular sulfonate filtrate reducer, which comprises the following steps:
1) and (3) starch puffed material synthesis:
adding corn starch, 20-25 parts of water and 5-10 parts of strong base into a kneader to be kneaded and reacted for 2-5 hours at the temperature of 30-100 ℃; after the reaction, adding acetic acid into a kneader, reacting for 0.5-2.5 hours at 110-130 ℃, and kneading reactants into particles;
2) kneading waste silk:
adding waste acrylic fibers, 20-30 parts of water and 2-13 parts of strong base into a kneader to react for 2-3 hours at the temperature of 80-140 ℃, and kneading reactants into rubble-like particles after reaction;
3) copolymerization of sulfonate:
adding AMPS, polyhydroxy amine polyether and 20-25 parts of water into a kneader to react for 2 hours below 90 ℃; after the reaction, adding an initiator into the kneading machine, carrying out an implosion reaction, and kneading the reactants into a honeycomb solid;
putting the product obtained by the reaction in the steps 1), 2) and 3) into stirring equipment with a heating function, adding a high-temperature stabilizer into a stirrer, stopping stirring until no moisture is evaporated, and packaging and warehousing after coarse crushing and fine grinding to obtain a finished product.
Preferably, in the step 1), the corn starch, 20 to 25 parts of water and 5 to 10 parts of strong base are added into a kneader to be kneaded and reacted for 4 hours at 70 ℃; acetic acid was added to the kneader and reacted at 120 ℃ for 2 hours.
Preferably, the reaction temperature is 100 ℃ and the reaction time is 3 hours at the time of kneading the waste filaments in step 2).
Compared with the prior art, the invention has the following advantages: the production process is advanced, no waste gas and waste residue are produced, the utilization rate of raw materials is high, no secondary pollution is formed, and the cost is low; the salt resistance is good, the viscosity is not increased, and the rheological property is improved; the compatibility is good, and the paint can be matched with other treating agents for use, so that the comprehensive cost in drilling is reduced; the method is widely applicable to drilling of formations with 4% saline water, 15% saline water or saturated saline water; the method has the advantages of strong production operability, salt resistance and good high-temperature resistance, and is widely suitable for deep well drilling under the pollution of various saline water in composite saline water and saturated saline water; obviously improves the physical and mechanical properties and the thermal stability of the polymer on the basis of the excellent properties of the original polymer, and has obvious fluid loss reducing effect under high temperature and high pressure.
Detailed Description
The present invention is further illustrated by the following examples. The starting materials for the respective products used in the examples are all commercially available conventional products unless otherwise specified.
Example one
A compound medium-molecular sulfonate filtrate reducer is composed of the following raw materials in parts by weight:
25 parts of corn starch; 15 parts of AMPS; 16 parts of acrylic waste silk; 60 parts of water; 10 parts of NaOH; 15 parts of polyhydroxy amine polyether; 5 parts of acetic acid; 0.1 part of an initiator; 2 parts of a high-temperature stabilizer.
The preparation method comprises three steps of starch swelling compound synthesis, waste silk kneading and sulfonate copolymerization. The method specifically comprises the following steps:
1) and (3) starch puffed material synthesis: adding 25 parts of corn starch, 20 parts of water and 5 parts of NaOH into a kneader to be kneaded and reacted for 5 hours at the temperature of 30 ℃; after the reaction, adding acetic acid into a kneader, reacting for 0.5 hour at 130 ℃, and kneading reactants into particles;
2) kneading waste silk: adding 16 parts of acrylic waste silk, 20 parts of water and 5 parts of strong base into a kneader to react for 3 hours at the temperature of 80 ℃, and kneading reactants into rubble-like particles after the reaction;
3) copolymerization of sulfonate: adding 15 parts of AMPS, 15 parts of polyhydroxy amine polyether and 20 parts of water into a kneader to react for 2 hours below 90 ℃; after the reaction, adding 0.1 part of initiator into the kneader, and carrying out implosion reaction, wherein the reaction product is kneaded into a honeycomb solid; wherein the initiator is sodium persulfate, and the high-temperature stabilizer is sodium sulfite;
putting the product obtained by the reaction in the steps 1), 2) and 3) into stirring equipment with a heating function, adding 2 parts of high-temperature stabilizer into a stirrer, stopping stirring until no water is evaporated, and packaging and warehousing after coarse crushing and fine grinding to obtain a finished product.
Example two
A compound medium-molecular sulfonate filtrate reducer is composed of the following raw materials in parts by weight: 35 parts of corn starch; 20 parts of AMPS; 20 parts of acrylic fiber waste silk; 70 parts of water; 15 parts of NaOH; 20 parts of polyhydroxy amine polyether; 7 parts of acetic acid; 1.3 parts of an initiator; 3 parts of a high-temperature stabilizer.
The preparation method comprises three steps of starch swelling compound synthesis, waste silk kneading and sulfonate copolymerization. The preparation method comprises the following steps:
1) and (3) starch puffed material synthesis: adding 35 parts of corn starch, 25 parts of water and 7 parts of NaOH into a kneader to be kneaded and reacted for 4 hours at 70 ℃; after the reaction, adding 7 parts of acetic acid into the kneader, reacting for 2 hours at 120 ℃, and kneading reactants into particles;
2) kneading waste silk: adding 20 parts of acrylic waste silk, 25 parts of water and 8 parts of NaOH into a kneader to react for 3 hours at 100 ℃, and kneading reactants into rubble-like particles after reaction;
3) copolymerization of sulfonate: adding 20 parts of AMPS, 20 parts of polyhydroxy amine polyether and 20 parts of water into a kneader to react for 2 hours below 90 ℃; after the reaction, adding 1.3 parts of sodium persulfate into the kneader, carrying out the implosion reaction, and kneading the reactants into a honeycomb solid; wherein the initiator is sodium persulfate, and the high-temperature stabilizer is sodium sulfite;
putting the product obtained by the reaction in the steps 1), 2) and 3) into stirring equipment with a heating function, adding 3 parts of sodium sulfite into a stirrer, stopping stirring until no water is evaporated, and packaging and warehousing after coarse crushing and fine grinding to obtain a finished product.
EXAMPLE III
A compound medium-molecular sulfonate filtrate reducer is composed of the following raw materials in parts by weight: 48 parts of corn starch; 25 parts of AMPS; 28 parts of acrylic fiber waste silk; 80 parts of water; 23 parts of NaOH; 25 parts of polyhydroxy amine polyether; 10 parts of acetic acid; 2 parts of an initiator; 5 parts of a high-temperature stabilizer.
The preparation method comprises three steps of starch swelling compound synthesis, waste silk kneading and sulfonate copolymerization. The preparation method comprises the following steps:
1) and (3) starch puffed material synthesis: adding 48 parts of corn starch, 25 parts of water and 10 parts of NaOH into a kneader, and kneading for 2 hours at 100 ℃; after the reaction, adding acetic acid into the kneader, reacting for 2.5 hours at 110 ℃, and kneading reactants into particles;
2) kneading waste silk: adding 28 parts of acrylic waste silk, 30 parts of water and 13 parts of NaOH into a kneader to react for 2 hours at 140 ℃, and kneading reactants into rubble-shaped particles after reaction;
3) copolymerization of sulfonate: adding 25 parts of AMPS, 25 parts of polyhydroxy amine polyether and 25 parts of water into a kneader to react for 2 hours below 90 ℃; after the reaction, adding an initiator into the kneading machine, carrying out an implosion reaction, and kneading the reactants into a honeycomb solid; wherein the initiator is sodium persulfate, and the high-temperature stabilizer is sodium sulfite;
putting the product obtained by the reaction in the steps 1), 2) and 3) into stirring equipment with a heating function, adding 3 parts of sodium sulfite into a stirrer, stopping stirring until no water is evaporated, and packaging and warehousing after coarse crushing and fine grinding to obtain a finished product. The AMPS is 2-acrylamido-2-methylpropanesulfonic acid.
The compound medium molecular sulfonate filtrate reducer of the invention has the following main performances measured by tests:
in the above table, the ratio of water: sodium bentonite: evaluation soil: sodium bicarbonate =400 mL: 11.0 g: 20.0 g: preparing base slurry according to the proportion of 1.0g, stirring at a high speed for 20min, maintaining in a closed manner at room temperature for 24h, stirring at a high speed for 5min, measuring the API water loss of the base slurry according to the GB/T16783.1, wherein the API water loss is within the range of (22-26) mL, and otherwise, the adding amount of the two soils is adjusted.
Taking 400mL of prepared base slurry, adding 4.0g of fluid loss additive, stirring at a high speed for 20min, placing into a high-temperature tank, rolling at 160 ℃ for 16h, cooling, taking out, stirring at a high speed for 5min, measuring apparent viscosity by using six-speed rotary viscosity, measuring API (API) fluid loss (0.7 MPa/30 min) by using a medium-pressure fluid loss instrument, and measuring HTHP fluid loss by using a high-temperature high-pressure fluid loss instrument.
As 4% brine: evaluation soil: sodium bicarbonate 350: 35.0: 1.0, stirring at high speed for 20min, and sealing and maintaining at room temperature for 24 h. 350mL of the prepared base slurry are taken, 7.0g of fluid loss additive is added into each of the two prepared base slurry, and the mixture is stirred at a high speed for 20 min. Loading into high temperature tank, hot rolling at 160 deg.C for 16 hr, cooling, and taking out. The apparent viscosity was measured by six-speed rotational viscosity, the API water loss (0.7 MPa/30 min) by medium pressure fluid loss apparatus, and the HTHP water loss by high temperature high pressure fluid loss apparatus.
As can be seen from the above table, the ordinary fresh water base pulp has 25ml of API water loss and 70ml/30min of HTHP water loss without adding the invention, and the addition of 1% of the invention in the fresh water base pulp can effectively reduce water loss, and the invention does not tackify after adding the invention, and especially improves rheological property after increasing temperature, thus solving the defects that the pure starch filtrate reducer does not resist high temperature and the trisulfo copolymer tackifies, and the raw material acrylic fiber waste silk has low price, sufficient supply, no generation of waste residue and waste gas during secondary utilization, and the like, is beneficial to environmental protection, can be degraded under the action of strong alkali, and greatly enhances the salt resistance and temperature resistance. The method specifically comprises the following advantages:
1. the production process is advanced, no waste gas and waste residue are produced, the utilization rate of raw materials is high, no secondary pollution is formed, and the cost is low;
2. the salt resistance is good, the viscosity is not increased, and the rheological property is improved;
3. the compatibility is good, and the paint can be matched with other treating agents for use, so that the comprehensive cost in drilling is reduced;
4. the method is widely applicable to drilling of formations with 4% saline water, 15% saline water or saturated saline water.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (8)
1. The compound medium molecular sulfonate filtrate reducer is characterized by comprising the following raw materials in parts by weight:
25-48 parts of corn starch;
15-25 parts of AMPS;
16-28 parts of acrylic fiber waste silk;
60-80 parts of water;
10-23 parts of strong base;
15-25 parts of polyhydroxy amine polyether;
5-10 parts of acetic acid;
0.1-2 parts of an initiator;
2-5 parts of a high-temperature stabilizer.
2. The compound medium molecular sulfonate fluid loss additive according to claim 1, which is characterized in that: the composition is characterized by comprising the following raw materials in parts by weight:
35 parts of corn starch;
20 parts of AMPS;
20 parts of acrylic fiber waste silk;
70 parts of water;
15 parts of strong base;
20 parts of polyhydroxy amine polyether;
7 parts of acetic acid;
1.3 parts of an initiator;
3 parts of a high-temperature stabilizer.
3. The compound medium molecular sulfonate fluid loss additive according to claim 2, which is characterized in that: the initiator is sodium persulfate.
4. The compound medium molecular sulfonate fluid loss additive according to claim 2, which is characterized in that: the high-temperature stabilizer is sodium sulfite.
5. The compound medium molecular sulfonate fluid loss additive according to claim 2, which is characterized in that: the strong base is NaOH.
6. A method for preparing the compound medium-molecular sulfonate fluid loss additive of claim 1, which comprises the following steps:
1) and (3) starch puffed material synthesis:
adding corn starch, 20-25 parts of water and 5-10 parts of strong base into a kneader to be kneaded and reacted for 2-5 hours at the temperature of 30-100 ℃; after the reaction, adding acetic acid into a kneader, reacting for 0.5-2.5 hours at 110-130 ℃, and kneading reactants into particles;
2) kneading waste silk:
adding waste acrylic fibers, 20-30 parts of water and 2-13 parts of strong base into a kneader to react for 2-3 hours at the temperature of 80-140 ℃, and kneading reactants into rubble-like particles after reaction;
3) copolymerization of sulfonate:
adding AMPS, polyhydroxy amine polyether and 20-25 parts of water into a kneader to react for 2 hours below 90 ℃; after the reaction, adding an initiator into the kneading machine, carrying out an implosion reaction, and kneading the reactants into a honeycomb solid;
putting the product obtained by the reaction in the steps 1), 2) and 3) into stirring equipment with a heating function, adding a high-temperature stabilizer into a stirrer, stopping stirring until no moisture is evaporated, and packaging and warehousing after coarse crushing and fine grinding to obtain a finished product.
7. The method for preparing the compound type mesomolecular sulfonate fluid loss additive according to claim 6, wherein in the step 1), the corn starch, 20-25 parts of water and 5-10 parts of strong base are added into a kneader to be kneaded and reacted for 4 hours at 70 ℃; acetic acid was added to the kneader and reacted at 120 ℃ for 2 hours.
8. The method for preparing the compound type medium molecular sulfonate fluid loss additive according to claim 6, wherein the reaction temperature is 100 ℃ and the reaction time is 3 hours during the waste silk kneading in the step 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206465.4A CN112029485B (en) | 2020-11-03 | 2020-11-03 | Compound medium molecular sulfonate filtrate reducer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206465.4A CN112029485B (en) | 2020-11-03 | 2020-11-03 | Compound medium molecular sulfonate filtrate reducer and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112029485A true CN112029485A (en) | 2020-12-04 |
| CN112029485B CN112029485B (en) | 2021-02-26 |
Family
ID=73572774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011206465.4A Active CN112029485B (en) | 2020-11-03 | 2020-11-03 | Compound medium molecular sulfonate filtrate reducer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112029485B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735779A (en) * | 2009-12-14 | 2010-06-16 | 北京中科日升科技有限公司 | Anti-high temperature anti-saturation salt fluid loss agent and preparation method thereof |
| CN102051159A (en) * | 2010-11-19 | 2011-05-11 | 原玉红 | Suspension salt well completion fluid |
| CN102660038A (en) * | 2012-04-26 | 2012-09-12 | 山东大学 | Method for preparing hydrolytic polyacrylonitrile filtrate reducer by organic diamine cross-linking agent |
| CN103013456A (en) * | 2012-12-22 | 2013-04-03 | 中国石油大学(华东) | High-temperature-resistant viscosity-reduction filtrate reducer for drilling fluid and preparation method of filtrate reducer |
| CN109852355A (en) * | 2019-03-18 | 2019-06-07 | 四川上之登新材料有限公司 | A kind of polymer filtrate reducer |
-
2020
- 2020-11-03 CN CN202011206465.4A patent/CN112029485B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735779A (en) * | 2009-12-14 | 2010-06-16 | 北京中科日升科技有限公司 | Anti-high temperature anti-saturation salt fluid loss agent and preparation method thereof |
| CN102051159A (en) * | 2010-11-19 | 2011-05-11 | 原玉红 | Suspension salt well completion fluid |
| CN102660038A (en) * | 2012-04-26 | 2012-09-12 | 山东大学 | Method for preparing hydrolytic polyacrylonitrile filtrate reducer by organic diamine cross-linking agent |
| CN103013456A (en) * | 2012-12-22 | 2013-04-03 | 中国石油大学(华东) | High-temperature-resistant viscosity-reduction filtrate reducer for drilling fluid and preparation method of filtrate reducer |
| CN109852355A (en) * | 2019-03-18 | 2019-06-07 | 四川上之登新材料有限公司 | A kind of polymer filtrate reducer |
Non-Patent Citations (1)
| Title |
|---|
| 樊泽霞: "具有抑制性的抗温耐盐改性腈纶钻井液降滤失剂KWY的研制", 《油田化学》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112029485B (en) | 2021-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101831262B (en) | Special corn biomass-based adhesive and method for preparing same | |
| CN108728053B (en) | Environment-friendly temperature-resistant salt-resistant plugging fluid loss additive for low-solid-phase brine drilling fluid and preparation method thereof | |
| CN103013456B (en) | High-temperature-resistant viscosity-reduction filtrate reducer for drilling fluid and preparation method of filtrate reducer | |
| CN103333263A (en) | Preparation method of crosslinked-acetylated-octenyl succinic acid ester ternary composite modified starch | |
| CN113150176B (en) | Preparation method of multi-group cross-linked modified hydroxypropyl starch ether | |
| CN110590965A (en) | Preparation method of modified starch ether for improving opening time of tile glue | |
| MX2013001791A (en) | Nonionic hydrophobically substituted cellulose ethers. | |
| EP0573852B1 (en) | Sulphoalkyl groups containing alkyl hydroxyalkyl cellulose ether | |
| CN110724503B (en) | High-temperature salt-resistant filtrate reducer modified gum resin for drilling fluid | |
| CN111234789B (en) | Filtrate reducer acrylamide/acrylic acid copolymer for drilling fluid | |
| CN109913186B (en) | Petroleum drilling auxiliary and preparation method thereof | |
| CN115850805A (en) | Multipurpose modified hydroxypropyl starch for building materials as well as preparation method and application thereof | |
| CN101735779B (en) | Anti-high temperature anti-saturation salt fluid loss agent and preparation method thereof | |
| CN112029485B (en) | Compound medium molecular sulfonate filtrate reducer and preparation method thereof | |
| CN113773819B (en) | Water-based drilling fluid and application thereof | |
| CN112029486B (en) | Preparation method of environment-friendly degradable high-temperature-resistant salt-resistant anti-collapse filtrate reducer | |
| CN105419752A (en) | Slurry process for preparing filtrate reducer for water-based drilling fluid by utilizing anaerobic fermentation biogas residues | |
| CN113248665B (en) | Sewage-resistant polymer for oil extraction and preparation method thereof | |
| CN114605970A (en) | Humic acid resin filtrate reducer for drilling fluid and preparation method thereof | |
| CN105482787A (en) | Kneading method for preparing water-based drilling fluid filtrate reducer by using anaerobic fermentation biogas residues | |
| CN113121712A (en) | Starch mixed acid ester derivative and preparation method thereof | |
| CN106634884A (en) | Bionic wall reinforcer for drilling fluids and preparation method thereof | |
| CN112210059A (en) | Biomass synthetic resin filtrate reducer, preparation method thereof and water-based drilling fluid filtrate reducer | |
| CN114763467B (en) | Hyperbranched aminosilane collapse preventing agent, water-based drilling fluid containing hyperbranched aminosilane collapse preventing agent and preparation of water-based drilling fluid | |
| CN113512157B (en) | High-temperature-resistant, salt-resistant and anti-collapse filtrate reducer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |