CN115141617A - Tackifying and cutting-off agent, oil-based mud flushing fluid, and preparation method and application thereof - Google Patents
Tackifying and cutting-off agent, oil-based mud flushing fluid, and preparation method and application thereof Download PDFInfo
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- CN115141617A CN115141617A CN202110348913.2A CN202110348913A CN115141617A CN 115141617 A CN115141617 A CN 115141617A CN 202110348913 A CN202110348913 A CN 202110348913A CN 115141617 A CN115141617 A CN 115141617A
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- tackifying
- carbonate
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- 239000012530 fluid Substances 0.000 title claims abstract description 34
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 69
- 239000004088 foaming agent Substances 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 17
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims abstract description 15
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 18
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 12
- 229960000892 attapulgite Drugs 0.000 claims description 11
- 229910052625 palygorskite Inorganic materials 0.000 claims description 11
- 230000002708 enhancing effect Effects 0.000 claims description 8
- 230000001737 promoting effect Effects 0.000 claims description 8
- 238000009461 vacuum packaging Methods 0.000 claims description 8
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 7
- 229920002310 Welan gum Polymers 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000000230 xanthan gum Substances 0.000 claims description 7
- 229920001285 xanthan gum Polymers 0.000 claims description 7
- 229940082509 xanthan gum Drugs 0.000 claims description 7
- 235000010493 xanthan gum Nutrition 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- PPQREHKVAOVYBT-UHFFFAOYSA-H dialuminum;tricarbonate Chemical compound [Al+3].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O PPQREHKVAOVYBT-UHFFFAOYSA-H 0.000 claims description 4
- 239000004604 Blowing Agent Substances 0.000 claims description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 3
- 239000011976 maleic acid Substances 0.000 claims description 3
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 3
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 3
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 3
- 239000011736 potassium bicarbonate Substances 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 235000011181 potassium carbonates Nutrition 0.000 claims description 3
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000011975 tartaric acid Substances 0.000 claims description 3
- 235000002906 tartaric acid Nutrition 0.000 claims description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 229940118662 aluminum carbonate Drugs 0.000 claims description 2
- QWDJLDTYWNBUKE-UHFFFAOYSA-L magnesium bicarbonate Chemical compound [Mg+2].OC([O-])=O.OC([O-])=O QWDJLDTYWNBUKE-UHFFFAOYSA-L 0.000 claims description 2
- 239000002370 magnesium bicarbonate Substances 0.000 claims description 2
- 229910000022 magnesium bicarbonate Inorganic materials 0.000 claims description 2
- 235000014824 magnesium bicarbonate Nutrition 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 239000011973 solid acid Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 7
- 239000004568 cement Substances 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 239000003826 tablet Substances 0.000 description 17
- 238000005553 drilling Methods 0.000 description 14
- 238000010008 shearing Methods 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 239000003623 enhancer Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000002318 adhesion promoter Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920002334 Spandex Polymers 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007938 effervescent tablet Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
Landscapes
- 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)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses a tackifying and shearing-improving agent, an oil-based mud flushing fluid, and a preparation method and application thereof. The preparation raw materials of the tackifying and cutting-off agent comprise a tackifying agent and a foaming agent, wherein the weight of the foaming agent accounts for 40-70% of that of the tackifying agent, and the preparation raw materials of the foaming agent comprise an acid and at least one of carbonate and bicarbonate. The tackifying and cutting agent provided by the invention is convenient to use, and only needs to be poured into a field water preparation tank according to production requirements and stirred to be dissolved, so that when the tackifying and cutting agent is used for an oil-based mud flushing fluid, oil slurry, an oil film, a mud cake and the like adhered to a well wall and the like can be efficiently flushed, the cementing environment of an annular interface is further improved, and the sealing quality of a cement ring is ensured.
Description
Technical Field
The invention relates to the field of oil and gas well drilling, in particular to a tackifying and shear-enhancing agent, an oil-based mud flushing fluid prepared from the tackifying and shear-enhancing agent, and a preparation method and application of the tackifying and shear-enhancing agent.
Background
In the well cementation process, the problem of instability of the well wall brings certain difficulties to the operation processes of well drilling, geological logging, well cementation and the like. Among them, oil-based drilling fluids are generally used to solve the problem of shale stability and achieve good drilling construction effects. However, in the case of a well cementing construction process, the oil-based drilling fluid can be retained at the interface and form oil slurry and an oil film, which can seriously affect the interface cementing strength of the cement sheath and reduce the sealing quality of the cement sheath. Therefore, before cementing, flushing fluid with high-efficiency flushing function is injected for cleaning oil slurry, oil films and mud cakes adhered to the interface, improving the cementing environment of the annular interface and ensuring the sealing quality of a cement sheath.
In the prior art, oil-based mud flushing fluid for well cementation based on a polymer surfactant usually needs to be added with a flow pattern regulator (such as a tackifying polymer or an inorganic substance) so as to ensure that the flushing fluid has certain shearing force and viscosity and plays a role in dragging oil slurry and an oil film under the action of a hydraulic machine. Meanwhile, the strong emulsification effect of the flushing fluid can effectively emulsify an oil film and residual oil, so that the aim of cleaning the viscous oil-based drilling fluid is fulfilled.
CN105315979A discloses an oil-based mud flushing fluid for well cementation and a preparation method thereof, wherein the flushing fluid comprises the following components in parts by weight: 100 parts by weight of water; 1-4 parts by weight of a polymer surfactant; 1-3 parts of nano attapulgite; the structural formula of the polymer surfactant is that the particle diameter of the nano attapulgite is between 2 and 50 nm. The preparation method of the flushing liquid comprises the following steps: and uniformly stirring the components according to the using amount to prepare the oil-based mud flushing fluid for well cementation. The flushing fluid has a good cleaning and displacing effect on the white oil-based drilling fluid and the diesel oil-based drilling fluid used in drilling, can effectively solve the problems of high viscosity of the oil-based drilling fluid used in drilling, difficulty in cleaning an oil film during well cementation and unclean annular displacement, and particularly has a more obvious flushing effect on the drilling fluid with high plastic viscosity.
CN105315978A discloses an oil-based mud flushing fluid for well cementation and a preparation method thereof, wherein the flushing fluid comprises the following components in parts by weight: 100 parts of water; 4-8 parts of a nonionic surfactant; 5-8 parts of an anionic surfactant; 4-5 parts of amphoteric surfactant; 801-2 parts of spandex; tween 801-2 parts; 0.2 to 3.5 portions of viscosity and cutting extracting agent. The preparation method of the flushing liquid comprises the following steps: according to the dosage of the components, firstly adding the viscosity-increasing and cutting-improving agent, uniformly stirring, then adding other components, and uniformly stirring to prepare the oil-based mud flushing fluid for well cementation. The flushing fluid has certain shearing force and viscosity, and plays a role in dragging oil slurry and an oil film under the action of a hydraulic machine; meanwhile, the flushing fluid has a strong emulsifying effect, can effectively emulsify an oil film and residual oil, achieves the aim of effectively cleaning viscous oil-based drilling fluid, and is suitable for flushing the oil-based drilling fluid with high plastic viscosity and shear force.
However, the above-mentioned thickening and cutting agent has a particularly long dissolution time, and the surface thereof is first hydrated in water to wrap the undissolved portion inside, thereby forming a particle structure which is not completely hydrated.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a tackifying and shearing agent, an oil-based mud flushing fluid prepared from the tackifying and shearing agent, a preparation method and application of the tackifying and shearing agent.
The invention provides a tackifying and cutting agent, which is prepared from raw materials including a viscosity enhancer and a foaming agent, wherein the weight of the foaming agent accounts for 40-70% of that of the viscosity enhancer, and the raw materials for preparing the foaming agent include acid and at least one of carbonate and bicarbonate.
The tackifying and cutting agent provided by the invention utilizes the principle of 'effervescent tablets', wherein the gas generated by the foaming agent can disintegrate the tackifying and cutting agent and can be quickly dissolved after meeting water, so that the phenomenon that the inner undissolved part of the tackifying and cutting agent is wrapped after the surface of the tackifying and cutting agent in water is hydrated in water and forms a particle structure with incomplete hydration can be avoided, and the tackifying and cutting agent can be quickly and fully dissolved in water.
According to some embodiments of the viscosifying shear agent of the present disclosure, the shear agent is selected from at least one of attapulgite, welan gum, xanthan gum, and carboxymethylcellulose (CMC).
According to some embodiments of the adhesion promoting and cutting agent of the present invention, the particle size of the adhesion promoting agent is 200 to 350 mesh. In the present invention, by controlling the particle diameter of the adhesion promoter within this range, the contact area when the adhesion promoter is mixed with the foaming agent can be increased, so that the adhesion promoter and the foaming agent can be uniformly mixed.
According to some embodiments of the viscosifying cutting enhancing agent of the present invention, the acid is a solid acid selected from at least one of citric acid, tartaric acid, maleic acid, and sulfamic acid.
According to some embodiments of the viscosifying cutting agent of the present invention, the carbonate is a solid carbonate selected from at least one of sodium carbonate, potassium carbonate, magnesium carbonate, and aluminum carbonate.
According to some embodiments of the viscosifying shear agent of the present invention, the bicarbonate is a solid bicarbonate selected from at least one of sodium bicarbonate, potassium bicarbonate, and magnesium bicarbonate.
According to some embodiments of the adhesion promoting and shear enhancing agent of the present invention, H in the acid + Number of moles and CO in said carbonate 3 2- The molar ratio is 2.
According to some embodiments of the adhesion promoting and shear enhancing agent of the present invention, H in the acid + Number of moles and HCO in the bicarbonate 3 - The molar ratio is 1.
According to some embodiments of the tackified cutting enhancer of the present invention, the tackified cutting enhancer is a vacuum-packed tablet. According to the invention, the tackifying and cutting agent is vacuum-packaged, so that water vapor in the air can be isolated, and the phenomenon that the tackifying and cutting agent is disintegrated due to the generation of carbon dioxide gas after a foaming agent meets the water vapor is avoided.
The viscosity-increasing shear-promoting agent provided by the invention utilizes H in the viscosity-increasing shear-promoting agent + /CO 3 2- And/or H + /HCO 3 - The carbon dioxide gas generated after the reaction disintegrates the tackifying and shearing enhancing agent and can be quickly dissolved after meeting water, so that the defect that the surface of the tackifying and shearing enhancing agent can wrap the undissolved part in the tackifying and shearing enhancing agent after being hydrated with water in the traditional application process to form a particle structure with incomplete hydration is avoided.
The invention provides a preparation method of the tackifying and shearing-promoting agent, which comprises the step of mixing the shearing-promoting agent with the foaming agent, wherein the weight ratio of the foaming agent to the cementing agent is 40-70%.
According to some embodiments of the method of making of the present invention, the method of making the blowing agent is: mixing acid and carbonate according to H in acid + Mole number and CO in carbonate 3 2- The molar ratio is 2.
According to some embodiments of the method of making of the present invention, the method of making the blowing agent is: mixing acid and bicarbonate according to H in acid + Moles and HCO in bicarbonate 3 - Mixing according to the molar ratio of 1.
According to some embodiments of the method of making of the present invention, the method of making further comprises: and tabletting and vacuum packaging the mixed tackifying and cutting agent. The tabletting process is carried out by adopting a tablet machine, and the prepared tackifying and cutting agent is pressed into hard tablets. In the different embodiments of the present invention, the specific operation processes of the tabletting process and the vacuum packaging process are not limited, and tablets with different specifications can be formed by compressing through a conventional process.
In a third aspect of the present invention, there is provided an oil-based mud flushing fluid obtained by dissolving the above-mentioned viscosity-increasing shear-enhancing agent in water.
According to the tackifying and shear strength improving agent provided by the invention, the foaming agent can generate carbon dioxide gas after meeting water, so that the tackifying and shear strength improving agent is disintegrated and quickly dissolved when meeting water. Furthermore, the oil-based mud flushing fluid provided by the invention can efficiently flush oil slurry, an oil film, mud cakes and the like adhered to a well wall and the like, so that the cementing environment of an annular interface is improved, and the sealing quality of a cement sheath is ensured.
The invention provides a tackifying and cutting-off agent, a preparation method of the tackifying and cutting-off agent or application of the oil-based mud flushing fluid in a well cementation process, preferably application in the oil-based mud flushing process. But is not limited thereto.
The invention has the beneficial effects that:
the tackifying and cutting agent provided by the invention is convenient to use, and can be prepared by pouring the tackifying and cutting agent of the tablet into a field water preparation tank according to production needs and stirring to dissolve the tackifying and cutting agent.
When the tackifying and shearing agent is used for an oil-based mud flushing fluid, oil slurry, an oil film, a mud cake and the like adhered to a well wall and the like can be efficiently flushed, so that the cementing environment of an annular interface is improved, and the sealing quality of a cement sheath is ensured.
Detailed Description
In order that the present invention may be more readily understood, the following detailed description of the invention is given by way of example only, and is not intended to limit the scope of the invention.
Sources of reagents used in the examples of the invention:
(1) Attapulgite was purchased from texas continental shelf oil engineering technologies, ltd.
(2) Welan gum is available from texas continental shelf oil engineering technologies, ltd.
(3) Xanthan gum is available from texas continental shelf oil engineering technologies, ltd.
(4) Carboxymethyl cellulose is available from texas continental shelf oil engineering technologies, ltd.
The remaining reagents are commercially available.
[ example 1 ]
Uniformly mixing 100 parts by weight of attapulgite and 40 parts by weight of foaming agent, pressing into hard tablets with the diameter and thickness of 5mm by using a tablet press, and carrying out vacuum packaging to obtain a sample No. 1.
Wherein, in the foaming agent, the molar ratio of citric acid to sodium bicarbonate is 1.
[ example 2 ]
100 parts by weight of welan gum and 50 parts by weight of foaming agent are uniformly mixed, pressed into hard tablets with the specification of 1cm in diameter and thickness by a tablet press, and vacuum-packed to obtain sample No. 2.
Wherein, in the foaming agent, the molar ratio of tartaric acid to sodium carbonate is 1.
[ example 3 ]
Uniformly mixing 100 parts by weight of xanthan gum and 60 parts by weight of foaming agent, pressing into hard tablets with the specification of 3cm in diameter and thickness by using a tablet press, and carrying out vacuum packaging to obtain a sample No. 3.
Wherein, in the foaming agent, the molar ratio of maleic acid to potassium carbonate is 1.
[ example 4 ]
Uniformly mixing 100 parts by weight of carboxymethyl cellulose and 70 parts by weight of foaming agent, pressing into hard tablets with the specification of 5cm in diameter and thickness by using a tablet press, and carrying out vacuum packaging to obtain a sample No. 4.
Wherein, in the foaming agent, the molar ratio of sulfamic acid to potassium bicarbonate is 1.
Comparative example 1
Uniformly mixing 100 parts by weight of attapulgite and 35 parts by weight of foaming agent, pressing into hard tablets with the specification of 5mm in diameter and thickness by using a tablet press, and carrying out vacuum packaging to obtain a sample No. 5.
Wherein, in the foaming agent, the molar ratio of citric acid to sodium bicarbonate is 1.
Comparative example 2
Uniformly mixing 100 parts by weight of attapulgite and 75 parts by weight of foaming agent, pressing into hard tablets with the diameter and thickness of 5mm by using a tablet press, and carrying out vacuum packaging to obtain a sample No. 6.
Wherein, in the foaming agent, the molar ratio of citric acid to sodium bicarbonate is 1.
[ test examples ]
Respectively testing the solubility of samples No. 1-6, attapulgite, welan gum, xanthan gum and carboxymethyl cellulose (CMC) in water, and the specific process is as follows:
10g of each of sample Nos. 1# -6#, attapulgite, welan gum, xanthan gum and carboxymethylcellulose (CMC) was weighed and put into 200mL of water at 25 ℃ and stirred at 60 rpm for 5 minutes and 10 minutes, respectively, and the dissolution of each substance in water is shown in Table 1.
TABLE 1
As can be seen from table 1, samples # 1 to # 4 including the viscosity enhancer and the foaming agent prepared in the examples had good dissolution in water, and were completely dissolved by stirring at a low speed for 5 minutes at normal temperature, while the attapulgite, the welan gum, the xanthan gum, and the carboxymethyl cellulose (CMC) containing no foaming agent were not completely dissolved by stirring for 10 minutes. In addition, in the case of the thickening and shear-improving agent prepared in comparative example 1, the amount of the foaming agent added is small, which results in poor dissolution in 5 minutes, and when the amount of the foaming agent added is large, the dissolution of the thickening and shear-improving agent is promoted according to the action principle of the foaming agent, but the cost control in the industrial application process is not facilitated.
What has been described above is merely a preferred example of the present invention. It should be noted that other equivalent variations and modifications can be made by those skilled in the art based on the technical teaching provided by the present invention, and the protection scope of the present invention should be considered.
Claims (10)
1. The tackifying and cutting agent comprises a preparation raw material and a foaming agent, wherein the weight of the foaming agent accounts for 40-70% of the weight of the tackifying agent, and the preparation raw material of the foaming agent comprises an acid and at least one of carbonate and bicarbonate.
2. The adhesion promoting and cutting agent according to claim 1, wherein the adhesion promoting agent is at least one selected from the group consisting of attapulgite, welan gum, xanthan gum and carboxymethyl cellulose, and preferably has a particle size of 200 to 350 mesh.
3. The adhesion promoting and cutting agent of claim 1 or 2, wherein the acid is a solid acid selected from at least one of citric acid, tartaric acid, maleic acid and sulfamic acid; and/or the presence of a gas in the gas,
the carbonate is solid carbonate, and the solid carbonate is at least one selected from sodium carbonate, potassium carbonate, magnesium carbonate and aluminum carbonate; and/or the presence of a gas in the gas,
the bicarbonate is a solid bicarbonate selected from at least one of sodium bicarbonate, potassium bicarbonate, and magnesium bicarbonate.
4. The adhesion promoting and shear enhancing agent of any one of claims 1-3, wherein H in the acid is + Number of moles and CO in said carbonate 3 2- The molar ratio is 2; and/or the presence of a gas in the gas,
h in the acid + Moles and HCO in the bicarbonate 3 - The molar ratio is 1.
5. A viscosity increasing and cutting agent according to any one of claims 1 to 4, wherein the viscosity increasing and cutting agent is a vacuum packed tablet.
6. A method for preparing a viscosity increasing and cutting agent according to any one of claims 1 to 5, wherein the viscosity increasing and cutting agent is mixed with the foaming agent, wherein the weight of the foaming agent accounts for 40 to 70 percent of the weight of the viscosity increasing agent.
7. The method of claim 6, wherein the blowing agent is prepared by: mixing acid and carbonate according to H in acid + Mole number and CO in carbonate 3 2- Mixing according to the molar ratio of 2; and/or the presence of a gas in the gas,
the acid and bicarbonate are adjusted to H in the acid + Moles and HCO in bicarbonate 3 - Mixing according to the molar ratio of 1.
8. The production method according to claim 6 or 7, characterized by further comprising: and tabletting and vacuum packaging the mixed tackifying and cutting agent.
9. An oil-based mud flushing fluid obtained by dissolving the viscosity increasing and shear enhancing agent of any one of claims 1 to 5 in water.
10. A viscosifying cutting-off agent according to any one of claims 1 to 5, a method for the preparation of a viscosifying cutting-off agent according to any one of claims 6 to 8 or an oil-based mud flushing fluid according to claim 9 for use in a cementing process, preferably for use in an oil-based mud flushing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348913.2A CN115141617A (en) | 2021-03-31 | 2021-03-31 | Tackifying and cutting-off agent, oil-based mud flushing fluid, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348913.2A CN115141617A (en) | 2021-03-31 | 2021-03-31 | Tackifying and cutting-off agent, oil-based mud flushing fluid, and preparation method and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115141617A true CN115141617A (en) | 2022-10-04 |
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| CN202110348913.2A Pending CN115141617A (en) | 2021-03-31 | 2021-03-31 | Tackifying and cutting-off agent, oil-based mud flushing fluid, and preparation method and application thereof |
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| Country | Link |
|---|---|
| CN (1) | CN115141617A (en) |
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| GB2251438A (en) * | 1991-01-07 | 1992-07-08 | Courtaulds Fibres Ltd | Adhesive |
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| JP2007210928A (en) * | 2006-02-08 | 2007-08-23 | Sanei Gen Ffi Inc | Bath agent |
| JP2014023479A (en) * | 2012-07-27 | 2014-02-06 | Asahi Kasei Chemicals Corp | Tablets containing thickening polysaccharide |
| CN103965845A (en) * | 2013-02-05 | 2014-08-06 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN105315979A (en) * | 2014-07-28 | 2016-02-10 | 中国石油化工股份有限公司 | Well cementation oil-based slurry flushing liquid and preparation method thereof |
| CN105315978A (en) * | 2014-07-28 | 2016-02-10 | 中国石油化工股份有限公司 | Well cementation oil-based slurry flushing liquid and preparation method thereof |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270781A (en) * | 1969-02-24 | 1972-04-12 | Abbott Lab | Tableting medium |
| US4072535A (en) * | 1970-12-28 | 1978-02-07 | A. E. Staley Manufacturing Company | Precompacted-starch binder-disintegrant-filler material for direct compression tablets and dry dosage capsules |
| GB2251438A (en) * | 1991-01-07 | 1992-07-08 | Courtaulds Fibres Ltd | Adhesive |
| JP2004519467A (en) * | 2002-01-25 | 2004-07-02 | ソシエテ デ プロデユイ ネツスル ソシエテ アノニム | Water-soluble powders and tablets |
| JP2007210928A (en) * | 2006-02-08 | 2007-08-23 | Sanei Gen Ffi Inc | Bath agent |
| JP2014023479A (en) * | 2012-07-27 | 2014-02-06 | Asahi Kasei Chemicals Corp | Tablets containing thickening polysaccharide |
| CN103965845A (en) * | 2013-02-05 | 2014-08-06 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN105315979A (en) * | 2014-07-28 | 2016-02-10 | 中国石油化工股份有限公司 | Well cementation oil-based slurry flushing liquid and preparation method thereof |
| CN105315978A (en) * | 2014-07-28 | 2016-02-10 | 中国石油化工股份有限公司 | Well cementation oil-based slurry flushing liquid and preparation method thereof |
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