WO2020158956A1 - 分解性樹脂組成物、分解性硬化物、及び、掘削用ダウンホールツール - Google Patents
分解性樹脂組成物、分解性硬化物、及び、掘削用ダウンホールツール Download PDFInfo
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- WO2020158956A1 WO2020158956A1 PCT/JP2020/003995 JP2020003995W WO2020158956A1 WO 2020158956 A1 WO2020158956 A1 WO 2020158956A1 JP 2020003995 W JP2020003995 W JP 2020003995W WO 2020158956 A1 WO2020158956 A1 WO 2020158956A1
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- URKBBEIOEBOBIY-UHFFFAOYSA-N pentane-1,1,1,2-tetrol Chemical compound CCCC(O)C(O)(O)O URKBBEIOEBOBIY-UHFFFAOYSA-N 0.000 claims description 4
- FVGBHSIHHXTYTH-UHFFFAOYSA-N pentane-1,1,1-triol Chemical compound CCCCC(O)(O)O FVGBHSIHHXTYTH-UHFFFAOYSA-N 0.000 claims description 4
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- 229940074415 potassium silicate Drugs 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- CQRYARSYNCAZFO-UHFFFAOYSA-N salicyl alcohol Chemical compound OCC1=CC=CC=C1O CQRYARSYNCAZFO-UHFFFAOYSA-N 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 229960001790 sodium citrate Drugs 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- YTZVWGRNMGHDJE-UHFFFAOYSA-N tetralithium;silicate Chemical compound [Li+].[Li+].[Li+].[Li+].[O-][Si]([O-])([O-])[O-] YTZVWGRNMGHDJE-UHFFFAOYSA-N 0.000 description 1
- RLQWHDODQVOVKU-UHFFFAOYSA-N tetrapotassium;silicate Chemical compound [K+].[K+].[K+].[K+].[O-][Si]([O-])([O-])[O-] RLQWHDODQVOVKU-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/0622—Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms
- C08G73/0638—Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms with at least three nitrogen atoms in the ring
- C08G73/065—Preparatory processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/0622—Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms
- C08G73/0638—Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms with at least three nitrogen atoms in the ring
- C08G73/065—Preparatory processes
- C08G73/0655—Preparatory processes from polycyanurates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2230/00—Compositions for preparing biodegradable polymers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/08—Down-hole devices using materials which decompose under well-bore conditions
Definitions
- part of the wellbore is blocked in order to efficiently generate cracks in the wellbore.
- hydraulic pressure can efficiently cause cracks and the like in the closed section.
- closing of the wellbore is sequentially performed on predetermined sections when a crack or the like is generated.
- the closing of the well hole may be performed to stimulate the production layer again or to finish the well in a desired section of the well hole that has already been formed.
- Patent Document 3 is a technique that uses decomposable glass, and is a technique that adjusts the decomposition rate by changing the compounding amount of the decomposable glass component in addition to the resin.
- the downhole tool for excavation used to close the well hole further improvement of the technology that can be easily removed after its use is strongly desired.
- the compound (B) contains at least one compound selected from a compound having an alcoholic hydroxyl group, a compound having a phenolic hydroxyl group, and a compound having an alcoholic hydroxyl group and a phenolic hydroxyl group.
- the compound (B) is any one or more selected from the group consisting of an aliphatic polyol (b1), an alicyclic polyol (b2), an aromatic polyol (b3) and a trialkanolamine (b4).
- the degradable resin composition according to any one of ⁇ 1> to ⁇ 3> above.
- the aliphatic polyol (b1) is ethanediol, propanediol, propanetriol, propanetetraol, butanediol, butanetriol, butanetetraol, pentanediol, pentanetriol, pentanetetraol, pentanepentaol, hexane.
- the decomposable resin composition according to ⁇ 4> which contains any one or more thereof.
- the alicyclic polyol (b2) is cyclopentanediol, cyclopentanetriol, cyclopentanetetraol, cyclopentanepentaol, cyclohexanediol, cyclohexanetriol, cyclohexanetetraol, cyclohexanepentaol, cyclohexanehexaol, hydrogen.
- the aromatic polyol (b3) is dihydroxybenzene, trihydroxybenzene, tetrahydroxybenzene, pentahydroxybenzene, hexahydroxybenzene, bisphenol A, bisphenol B, bisphenol C, bisphenol E, bisphenol F, dihydroxybiphenyl, naphthalene.
- ⁇ 9> The degradable resin composition according to any one of ⁇ 1> to ⁇ 8>, further containing at least one of an inorganic filler and an organic filler as a filler.
- the filler is a salt.
- the salt is an alkali metal salt.
- the alkali metal salt is water-soluble.
- ⁇ 13> The degradability according to any one of ⁇ 9> to ⁇ 12>, wherein the filler includes at least one of a hydrolyzable filler and a soluble filler, and a non-degradable filler.
- Resin composition. ⁇ 14> The equivalent ratio [OH/OCN] of the cyanato group [OCN] in the cyanate ester (A) and the hydroxyl group [OH] of the compound (B) is 0.02 to 1.0. 1> to ⁇ 13>, the decomposable resin composition.
- ⁇ 15> The degradable resin composition according to any one of ⁇ 1> to ⁇ 14>, wherein the cured product obtained by curing the degradable resin composition is a degradable cured product that decomposes by hydrolysis.
- the maintenance ratio of the stress at break S 1 after hydrolysis (24 hours) to the stress at break 0 before hydrolysis of the decomposable cured product is 90% or less.
- ⁇ 15> Degradable resin composition.
- ⁇ 17> A decomposable cured product obtained by curing the decomposable resin composition according to any one of ⁇ 1> to ⁇ 14>.
- ⁇ 18> The decomposable cured product according to ⁇ 17>, which decomposes by hydrolysis.
- ⁇ 19> A downhole tool for excavation including the decomposable cured product according to ⁇ 17> or ⁇ 18>.
- the decomposable resin composition which can provide the decomposable hardened
- the decomposable resin composition of the present embodiment contains a cyanate ester (A).
- the “cyanate ester (A)” in the present embodiment is a resin having an aromatic moiety in the molecule, which is substituted with at least one cyanato group (cyanate ester group), and is not particularly limited as long as it is the resin. Can be used without.
- the cyanate ester (A) is not particularly limited, but the cyanate ester compounds described in International Publication WO2017/135168 can be used, and examples thereof include cyanatobenzene, 1-cyanato-2-,1-cyanato. -3-, or 1-cyanato-4-methylbenzene, 1-cyanato-2-, 1-cyanato-3-, or 1-cyanato-4-methoxybenzene, 1-cyanato-2,3-, 1-cyanato -2,4-,1-Cyanato-2,5-,1-cyanato-2,6-,1-cyanato-3,4- or 1-cyanato-3,5-dimethylbenzene, cyanatoethylbenzene, cyanato Butylbenzene, cyanatooctylbenzene, cyanatononylbenzene, 2-(4-cyanaphenyl)-2-phenylpropane (4- ⁇ -cumylphenol cyanate), 1-cyanato-4-cycl
- a cyanate ester prepolymer is preferable from the viewpoint of adjusting the viscosity at the time of melting, and a 2,2-bis(4-cyanatophenyl)propane prepolymer, bis Prepolymer of (4-cyanatophenyl)methane, prepolymer of 1,1-(4-cyanatophenyl)ethane, prepolymer of 1,1-bis(4-cyanatophenyl)-1-phenylethane, 2 A prepolymer of 2,2-bis(4-cyanatophenyl)butane and a prepolymer of 2,2-bis(3-methyl-4-cyanatophenyl)propane are more preferable.
- the “prepolymer” means an intermediate material in which the polymerization or condensation reaction of the monomer is stopped at an intermediate stage, and means a material at a stage before becoming a polymer.
- the cyanate ester prepolymer is preferably a polymer having a weight average molecular weight (Mw) of 160 to 4000, for example.
- the weight average molecular weight (Mw) of the cyanate ester (A) is not particularly limited, but from the viewpoint of controlling the strength and hydrolyzability of the cured product, it can be 160 to 4000, and 160 to 3000 is The range of 160 to 2000 is more preferable.
- the cyanate equivalent of the cyanate ester (A) is not particularly limited, but from the viewpoint of controlling the strength and hydrolyzability of the cured product, it can be 50 to 2000, preferably 60 to 1500, and 80 to 1000 is more preferred.
- cyanate ester (A) of the present embodiment a commercially available product can be appropriately used.
- examples of commercially available cyanate ester (A) include prepolymers of 2,2-bis(4-cyanatophenyl)propane (CA210 (product name) manufactured by Mitsubishi Gas Chemical Co., Inc.) and TA-1500 (product name). ) And the like).
- the cyanate ester (A) may be used alone or in combination of two or more.
- the method for producing the cyanate ester (A) is not particularly limited, and a known method can be used. Examples of such a production method include a method of obtaining or synthesizing a hydroxy group-containing compound having a desired skeleton, and modifying the hydroxy group by a known method to form a cyanate. Examples of the method for cyanating a hydroxy group include a method described in Ian Hamerton, “Chemistry and Technology of Cyanate Esters Resins,” Blackie Academic & Professional.
- cyanate ester (A), compound (B) and filler the total mass of “cyanic acid ester (A) and compound (B)” is preferably 5 to 99% by mass, more preferably 10 to 99% by mass, and 15 to It is particularly preferably 99% by mass.
- the total mass of the cyanate ester (A) and the compound (B) is 99% by mass or more based on the total solid content of the degradable resin composition. Is preferred.
- the “solid content” in the composition means a solid portion constituting the cured product when the decomposable resin composition is a cured product, and as described above, the degradable resin composition.
- the “solid content” in the composition means a solid portion constituting the cured product when the decomposable resin composition is a cured product, and as described above, the degradable resin composition.
- the “solid content” in the composition means a solid portion constituting the cured product when the decomposable resin composition is a cured product, and as described above, the degradable resin composition.
- the “solid content” in the composition means a solid portion constituting the cured product when the decomposable resin composition is a cured product, and as described above, the degradable resin composition.
- the “solid content” in the composition means a solid portion constituting the cured product when the decomposable resin composition is a cured product, and as described above, the degradable resin composition.
- the decomposable resin composition of this embodiment has a hydroxyl group and has a hydroxyl group equivalent of 240 g/eq.
- the compound (B) is less than.
- the compound (B) is a compound containing a hydroxyl group as a reactive group of a cyanato group, and the hydroxyl equivalent is 240 g/eq. Is a compound that is less than.
- the hydroxyl equivalent of the compound (B) is 240 g/eq.
- the hydroxyl equivalent of the compound (B) is 150 g/eq.
- the hydroxyl equivalent of the compound (B) is preferably 18 g/eq or more, and 30 g/eq. The above is particularly preferable.
- hydroxyl group equivalent of the compound (B) can be calculated from the following calculation formula (i).
- Formula (i): Hydroxyl equivalent Compound (B) weight average molecular weight (Mw) / Compound (B) hydroxyl group number
- the compound (B) is preferably a polyol having two or more hydroxyl groups in one molecule.
- the "polyol” is a compound having two or more hydroxyl groups in one molecule.
- a compound having two or more hydroxyl groups has one aromatic hydroxyl group and one aliphatic hydroxyl group. Such compounds are also included.
- the compound (B) at least one selected from compounds having an alcoholic hydroxyl group, compounds having a phenolic hydroxyl group, and compounds having an alcoholic hydroxyl group and a phenolic hydroxyl group can be selected.
- the hydroxyl group of the compound (B) is not limited to the alcoholic hydroxyl group (aliphatic hydroxyl group) and the phenolic hydroxyl group (aromatic hydroxyl group).
- the compound (B) may also contain a bond such as ester or ether, or a functional group such as amine, or may contain a saturated bond or an unsaturated bond. Further, the compound (B) may be used alone or in combination of two or more kinds.
- Examples of compounds having two or more alcoholic hydroxyl groups in one molecule include aliphatic polyols, alicyclic polyols, trialkanolamines and the like.
- the aliphatic polyol may be any of divalent polyol, trivalent polyol, tetravalent polyol, polyvalent polyol and the like.
- Examples of the divalent polyol include ethanediol, propanediol, propanetriol, propanetetraol, butanediol, butanetriol, butanetetraol, pentanediol, pentanetriol, pentanetetraol, pentanepentaol, hexanediol and hexanetriol.
- Examples of the trivalent polyol include glycerin, trimethylolpropane, trimethylolethane, and 1,2,6-hexanetriol.
- examples of the tetrahydric alcohol include pentaerythritol, diglycerin and the like.
- the polyhydric polyol include polyvinyl alcohol and polyvinyl alcohol partial acetalization products (eg, polyvinyl formal, polyvinyl butyral, etc.).
- Examples of the alicyclic polyol include cyclopentanediol, cyclopentanetriol, cyclopentanetetraol, cyclopentanepentaol, cyclohexanediol, cyclohexanetriol, cyclohexanetetraol, cyclohexanepentaol, cyclohexanehexaol (these structural isomers).
- a polyol having an adamantane or norbornene structure and bisphenols such as bisphenol A, bisphenol E, bisphenol F, and bisphenol AF which are aromatic polyols; biphenyls such as dihydroxybiphenyl; hydroquinone, phenol formaldehyde condensate, etc.
- Polyhydric phenols such as naphthalene diol, catechol, resorcinol, hydroquinone, pyrogallol, hexahydroxybenzene, and the like, and hydrogenated aromatic rings.
- alkanolamines examples include tertiary alkanolamines (trialkanolamines) having a particularly small hydroxyl equivalent, and for example, triisopropanolamine, triethanolamine and the like can be used.
- alkanolamines examples include tertiary alkanolamines (trialkanolamines) having a particularly small hydroxyl equivalent, and for example, triisopropanolamine, triethanolamine and the like can be used.
- examples of the compound having another functional group examples include saccharides such as monosaccharides, oligosaccharides, and polysaccharides.
- Examples of the compound having a phenolic hydroxyl group include dihydroxybenzene, trihydroxybenzene, tetrahydroxybenzene, pentahydroxybenzene, hexahydroxybenzene (including their structural isomers), bisphenol A and bisphenol F. , Bisphenols such as bisphenol AF; biphenyls such as dihydroxybiphenyl; polyhydric phenols such as hydroquinone and phenol formaldehyde condensate; and naphthalene diol.
- Examples of compounds having an alcoholic hydroxyl group and a phenolic hydroxyl group in one molecule include vanillyl alcohol (4-hydroxy-3-methoxybenzyl alcohol), salicyl alcohol, gastrodigenin and the like.
- Examples of the aliphatic polyol (b1) include ethanediol, propanediol, propanetriol, propanetetraol, butanediol, butanetriol, butanetetraol, pentanediol, pentanetriol, pentanetetraol, pentanepentaol, hexane.
- Examples of the alicyclic polyol (b2) include cyclopentanediol, cyclopentanetriol, cyclopentanetetraol, cyclopentanepentaol, cyclohexanediol, cyclohexanetriol, cyclohexanetetraol, cyclohexanepentaol, cyclohexanehexaol and hydrogen.
- any one selected from the group selected from added bisphenol A, hydrogenated bisphenol B, hydrogenated bisphenol C, hydrogenated bisphenol E, hydrogenated bisphenol F, decahydronaphthalenediol, decahydronaphthalenetriol, decahydronaphthalenetetraol is preferable.
- these alicyclic polyols have structural isomers, the structural isomers are included.
- the aromatic polyol (b3) is, for example, dihydroxybenzene, trihydroxybenzene, tetrahydroxybenzene, pentahydroxybenzene, hexahydroxybenzene, bisphenol A, bisphenol B, bisphenol C, bisphenol E, bisphenol F, dihydroxybiphenyl, naphthalenediol. At least one selected from the group consisting of, naphthalenetriol, and naphthalenetetraol is preferable. When these aromatic polyols have structural isomers, the structural isomers are included.
- the trialkanolamine (b4) is preferably at least one selected from the group selected from trimethanolamine, triethanolamine, tripropanolamine, triisopropanolamine and tributanolamine.
- the equivalent ratio [OH/OCN] of the cyanato group [OCN] in the decomposable resin composition and the hydroxyl group [OH] of the compound (B) can be calculated as follows.
- Metal hydrates such as magnesium hydroxide, molybdenum compounds such as molybdenum oxide and zinc molybdate, zinc borate, zinc stannate,
- Examples thereof include tripotassium acid, potassium carbonate, potassium hydrogen carbonate, potassium silicate, potassium metasilicate, potassium orthosilicate, potassium acetate, potassium citrate, and potassium oxalate.
- the "fibrous”, “scaly”, “plate-like” and “needle-like” fillers have a ratio of the average length of the filler to the average thickness (aspect ratio) of 1. It means that it is 5 or more.
- the aspect ratio of the fibrous, scaly, plate-like, and acicular fillers is preferably 5 or more, more preferably 10 or more, and further preferably 100 or more from the viewpoint of improving mechanical strength.
- the aspect ratio of the filler can be obtained from the average value of the thickness and length of 1000 pieces measured by an electron microscope (SEM).
- the fibrous filler is monodispersed and mixed in the powder, but the state in which the fibrous filler is entangled with each other or the bundle of a plurality of fibrous fillers aligned in the same direction It may be mixed in the state. In the monodisperse state, the fibrous fillers may be oriented in the same direction.
- the "spherical" and “indefinite” fillers have an aspect ratio of less than 1.5.
- the particle size is preferably 0.1 ⁇ m to 500 ⁇ m. If the particle size of the filler is smaller than 0.1 ⁇ m, monodispersion may be difficult. When the particle size of the filler is larger than 500 ⁇ m, the strength of the resin composition may be reduced if the strength of the filler is low. From the viewpoint of dispersibility of the filler and reduction in strength of the resin composition, the particle size is more preferably 0.1 ⁇ m to 400 ⁇ m, and particularly preferably 0.1 ⁇ m to 300 ⁇ m.
- the average length is preferably about 0.1 ⁇ m to 30 ⁇ m.
- the particle size is 0.1 ⁇ m to 50 ⁇ m or less.
- alkali metal silicates such as sodium silicate, sodium metasilicate and sodium orthosilicate mentioned above; halogenated alkali metal salts such as sodium chloride and potassium chloride are appropriately used as fillers.
- the hydrolyzate and the filler itself being dissolved in water or the like, the decomposition of the resin in the decomposable cured product can be promoted, and the decomposability of the decomposable cured product can be controlled.
- a filler that can accelerate the decomposition of the decomposable cured product or the like by breaking the bond in the resin in the decomposable cured product or by decomposing or dissolving the filler itself is referred to as "resin decomposition promoting filler. It may be called ".
- resin decomposition promoting filler it may be called ".
- the bond or the like in the resin when the bond or the like in the resin is lost, the mechanical bond in the decomposable cured product, the chemical interaction, the bonding state due to physical interaction is lost, and the initial production With respect to the decomposable cured product, the weight and mechanical strength decrease.
- the resin decomposition accelerating filler typically, a “hydrolyzable filler” which is hydrolyzable and whose hydrolyzate becomes acidic or basic, or hydraulic crushing.
- “Soluble fillers” that are soluble in water and various solvents used for.
- a salt can be used, and as the salt, for example, an alkali metal salt can be used.
- the alkali metal salt include the above-mentioned alkali metal salts, and of these, for example, a water-soluble alkali metal salt can be used.
- the resin decomposition accelerating filler is not limited to these.
- a filler which is hydrolyzed by water used for hydraulic fracturing and produces an acidic or basic hydrolyzate is used.
- a filler which is hydrolyzable and whose hydrolyzate becomes acidic or basic may be referred to as "hydrolyzable filler”.
- the hydrolyzate of the filler has strong acidity or basicity.
- the hydrolyzate of the resin in the cured product is also strongly acidic or basic.
- the hydrolyzable filler in which the hydrolyzate becomes acidic or basic sodium oxalate, sodium silicate, sodium metasilicate and the like can be used.
- These hydrolyzable fillers are particularly preferable in that the resin can be decomposed more quickly because the hydrolyzate is highly acidic and basic.
- the hydrolyzability You may use the filler which does not have or does not dissolve in the fluid used at the time of hydraulic fracturing, such as water and various solvents.
- a filler that does not show hydrolysis and does not show solubility in water or a solvent (particularly water) may be referred to as a “non-degradable filler”.
- the non-degradable filler when 15 g of the sample is immersed in 100 mL of water in an environment of 25° C.
- filler that does not hydrolyze or dissolve means that the dry mass of the filler does not decrease by 1 mass% or more after the above-mentioned 4 hours have passed.
- the non-decomposable filler is not particularly limited, and examples thereof include silicas such as the above-mentioned natural silica, fused silica, synthetic silica, amorphous silica, aerosil and hollow silica, white carbon, titanium white, zinc oxide.
- the filler in the degradable resin composition of the present embodiment can include at least one of a hydrolyzable filler and a soluble filler, and a non-degradable filler.
- a hydrolyzable filler or a soluble filler and a non-degradable filler include, for example, a combination of a hydrolyzable filler and a non-hydrolyzable filler, with respect to water or a solvent.
- a filler that is soluble in water and a filler that is not soluble in water or a solvent a filler that chemically reacts or solvates with a solvent, and a filler that does not chemically react or solvate with a solvent Examples include combinations with materials.
- the combination of the hydrolyzable filler and the non-decomposable filler a combination of sodium silicate and glass fiber, a combination of sodium oxalate and glass fiber, a combination of sodium metasilicate and glass fiber. Combination, etc. are mentioned. Further, examples of the combination of the soluble filler and the non-decomposable filler include a combination of sodium chloride and glass fiber, a combination of potassium chloride and glass fiber, and the like.
- the amount of the filler in the composition is not particularly limited, but the strength and degradability are not limited.
- the content of the filler with respect to the total weight of the cyanate ester (A), the compound (B) and the filler can be more than 0% by mass to 99% by mass, and 1 to 95%. Mass% is preferable, 1 to 90 mass% is more preferable, and 1 to 85 mass% is particularly preferable.
- a method for preparing the degradable resin composition in the present embodiment a known method for preparing a resin composition used for well drilling can be used.
- the above-mentioned cyanate ester (A), compound (B), and, if necessary, are collectively or divided into some and prepared by mixing at room temperature or under heating.
- a shearing force may be applied during mixing, or all or part of the composition components may be melt-mixed under heating.
- the pellets may be adjusted in consideration of handling convenience and the like.
- a twin-screw kneading extruder or the like can be used as a device for kneading under high shear.
- the degradable resin composition in the present embodiment as long as it does not impair the purpose of the present embodiment, as other compounding ingredients, a chain extender, a stabilizer, a decomposition accelerator or decomposition inhibitor, a reinforcing agent or a pigment such as a pigment.
- Various additives such as agents, plasticizers, nucleating agents, other resin materials such as degradable resins, and impact resistance improvers may be contained.
- the content of the other compounding ingredients can be appropriately determined according to each type and purpose.
- the decomposable resin composition may further contain resin modifiers, mold corrosion inhibitors such as zinc carbonate and nickel carbonate, lubricants, ultraviolet absorbers, nucleating agents such as boron nitride, flame retardants, etc. The content and blending method of these can be based on the above description.
- the decomposable cured product of this embodiment is produced by curing the above decomposable resin composition.
- the method for producing the decomposable cured product is not particularly limited, and for example, injection molding, extrusion molding (including solidification extrusion molding), centrifugal molding, compression molding, and other known molding methods can be used to obtain a desired shape. It can be a molded article.
- injection molding, extrusion molding (including solidification extrusion molding), centrifugal molding, compression molding, and other known molding methods can be used to obtain a desired shape. It can be a molded article.
- the property method after forming the preform, after performing machining such as cutting and drilling as necessary, it can be combined by a method known per se to form a downhole tool for excavation. ..
- the decomposable cured product of this embodiment contains a resin cured by the reaction of the cyanato group of the cyanate ester (A) of this embodiment with the hydroxyl group of the compound (B) of this embodiment.
- the decomposable cured product of the present embodiment is a reaction product of the cyanate ester (A) and the compound (B), and therefore, compared with a cured product obtained by curing the cyanate ester (A) alone or with a catalyst. Excellent in degradability after hydrolysis treatment.
- the downhole tool for excavation of the present embodiment is preferably used for such a well hole closing application.
- the downhole tool for excavation for example, ball shape
- the space between the downhole tool for excavation and the wellbore (downhole) is closed, and the fracturing fluid injected from the ground can be blocked in a predetermined compartment.
- the drilling downhole tool that blocks the wellbore needs to be removed.
- the drilling downhole tool of the present embodiment is designed so that hydrolysis is promoted by the fracturing fluid and the stress at break decreases after a predetermined time. Therefore, by designing so that the stress at break of the downhole tool for drilling is reduced to such an extent that it will be decomposed (fragmented) by the hydraulic pressure of the fracturing fluid after the desired time has elapsed, it will be easy to drill Downhole tools can be disassembled and removed.
- the well drilling method of the present embodiment after completion of the well treatment or after completion of the well, a large number of well drilling downhole tools left in the well are removed and recovered.
- the control of the hydrolysis rate of the downhole tool (decomposable hardened material) for excavation (control of the fluctuation range (maintenance rate) of stress at break) is based on the type of cyanate ester (A) and compound (B) and the compound (B). It can be carried out by adjusting the hydroxyl equivalent of the above).
- another fluid may be separately injected for decomposition under a condition different from that of the fracturing fluid.
- the downhole tool for excavation that remains after the completion of the well treatment has completely disappeared by the start of production, but even if it does not completely disappear, the strength will decrease and the down If it becomes disintegrated due to the stimulation of water flow in the hole, the disintegratable seal member for downhole tool can be easily recovered by flowback, etc., and the downhole or fracture will be clogged. Since it does not occur, it does not hinder the production of oil and natural gas. Generally, the higher the temperature inside the well, the more quickly the decomposition and strength of the downhole tool for excavation will progress. In addition, depending on the well, the water content in the formation may be low.In that case, the water-based fluid used during fracturing is left in the well without being recovered after fracturing. The disassembly of the hall tool can be promoted.
- Example 1 Preparation of degradable resin composition
- a resin container with a volume of 500 ml equipped with a stirrer 10.0 g of trimethylolpropane (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was added as an aliphatic polyol, and 2,2-bis cyanate ester compound was added.
- Example 2 A decomposable resin composition was prepared in the same manner as in Example 1 except that trimethylolpropane was changed to 5.0 g, CA210 was changed to 95.0 g, and zinc octylate was changed to 0.01 g.
- Example 3 In place of trimethylolpropane, 10.0 g of 1,4-cyclohexanediol (manufactured by Tokyo Chemical Industry Co., Ltd.) was used as the aliphatic polyol, except that CA210 was changed to 90.0 g and zinc octylate was changed to 0.01 g. A degradable resin composition was prepared in the same manner as in Example 1.
- Example 4 In place of trimethylolpropane, 10.0 g of 2,2'-bis(4-hydroxyphenyl)propane (bisphenol A) was used as an aromatic polyol, CA210 was changed to 90.0 g, and zinc octylate was changed to 0.01 g. A degradable resin composition was prepared in the same manner as in Example 1 except that the above was performed.
- Example 5 Instead of trimethylolpropane, 5.1 g of triisopropanolamine (manufactured by Tokyo Kasei Kogyo Co., Ltd.) was used as the trialkanolamine, 94.9 g of CA210 and zinc octylate were not used, and Example 1 was used. Similarly, a degradable resin composition was prepared.
- Example 1 A degradable resin composition was prepared in the same manner as in Example 1 except that the amount of CA210 was changed to 100.0 g and the amount of zinc octylate was changed to 0.025 g without adding a polyol.
- the obtained degradable resin composition was filled in a mold made of SUS304, and cured by a press molding machine at a pressure of 30 kgf/cm 2 and a temperature of 220° C. for 90 minutes. After curing, the mold made of SUS304 was removed to obtain a cured plate. From the obtained decomposable cured product, a sample (decomposable cured product) of 50 mm ⁇ 10 mm ⁇ 1.5 mm or 40 mm ⁇ 10 mm ⁇ 1.5 mm was cut out and various measurements were performed.
- the obtained sample (decomposable cured product) was arranged in a SUS304 vat, and a pressure cooker tester (manufactured by Hirayama Seisakusho, model: PC242HS) was used at 121° C. and 2 atm (saturated steam atmosphere).
- the sample was subjected to hydrolysis treatment for a predetermined time (12 hours, 24 hours, 48 hours) (hereinafter, abbreviated as PCT treatment). After a lapse of a predetermined time, it was taken out, the above-mentioned three-point bending fracture stress measurement was carried out, and the retention rate (%) was calculated when the fracture stress at 0 hour was 100.
- a degradable resin composition was prepared in the same manner as in Example 6 except that the resin was added.
- a degradable resin composition was prepared in the same manner as in Example 6 except that the resin was added.
- sodium silicate manufactured by Tokuyama Corp., pre-feed powder product, average particle size 73 ⁇ m
- glass fiber manufactured by Nitto Boseki, product number: SS15-404, milled fiber, fiber diameter
- 34.6 g sodium silicate:glass fiber:com
- the obtained degradable resin composition was filled in a mold made of SUS304, and cured by a press molding machine at a pressure of 30 kgf/cm 2 and a temperature of 220° C. for 90 minutes. After curing, the mold made of SUS304 was removed to obtain a cured plate. From the obtained degradable cured product, 40 mm ⁇ 10 mm ⁇ 1.5 mm and 10 mm ⁇ 10 mm ⁇ 3.5 mm samples (degradable cured product) were cut out and various measurements were performed.
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Abstract
Description
<2> 前記化合物(B)が、一分子中に2以上の水酸基を有するポリオールを含む、前記<1>に記載の分解性樹脂組成物。
<3> 前記化合物(B)が、アルコール性水酸基を有する化合物、フェノール性水酸基を有する化合物、並びに、アルコール性水酸基及びフェノール性水酸基を有する化合物から選ばれる、少なくとも一種以上を含む前記<1>又は前記<2>に記載の分解性樹脂組成物。
<4> 前記化合物(B)が、脂肪族ポリオール(b1)、脂環式ポリオール(b2)、芳香族ポリオール(b3)、トリアルカノールアミン(b4)から選ばれる群のうち、いずれか一種以上を含む、前記<1>~前記<3>のいずれかに記載の分解性樹脂組成物。
<5> 前記脂肪族ポリオール(b1)が、エタンジオール、プロパンジオール、プロパントリオール、プロパンテトラオール、ブタンジオール、ブタントリオール、ブタンテトラオール、ペンタンジオール、ペンタントリオール、ペンタンテトラオール、ペンタンペンタオール、ヘキサンジオール、ヘキサントリオール、ヘキサンテトラオール、ヘキサンペンタオール、ヘキサンヘキサオール、ジグリセロール、ジトリメチロールプロパン、トリトリメチロールプロパン、ジネオペンチルグリコール、ジペンタエリスリトール、トリペンタエリスリトール、ポリビニルアルコール及びポリビニルアセタールから選ばれる群のうち、いずれか一種以上を含む、前記<4>に記載の分解性樹脂組成物。
<6> 前記脂環式ポリオール(b2)が、シクロペンタンジオール、シクロペンタントリオール、シクロペンタンテトラオール、シクロペンタンペンタオール、シクロヘキサンジオール、シクロヘキサントリオール、シクロヘキサンテトラオール、シクロヘキサンペンタオール、シクロヘキサンヘキサオール、水素添加ビスフェノールA、水素添加ビスフェノールB、水素添加ビスフェノールC、水素添加ビスフェノールE、水素添加ビスフェノールF、デカヒドロナフタレンジオール、デカヒドロナフタレントリオール、デカヒドロナフタレンテトラオール、から選ばれる群のうち、いずれか一種以上を含む、前記<4>又は前記<5>に記載の分解性樹脂組成物。
<7> 前記芳香族ポリオール(b3)が、ジヒドロキシベンゼン、トリヒドロキシベンゼン、テトラヒドロキシベンゼン、ペンタヒドロキシベンゼン、ヘキサヒドロキシベンゼン、ビスフェノールA、ビスフェノールB、ビスフェノールC、ビスフェノールE、ビスフェノールF、ジヒドロキシビフェニル、ナフタレンジオール、ナフタレントリオール、ナフタレンテトラオール、から選ばれる群のうち、いずれか一種以上を含む、前記<4>~前記<6>のいずれかに記載の分解性樹脂組成物。
<8> 前記トリアルカノールアミン(b4)が、トリメタノールアミン、トリエタノールアミン、トリプロパノールアミン、トリイソプロパノールアミン及びトリブタノールアミンから選ばれる群のうち、いずれか一種以上を含む、前記<4>~前記<7>のいずれかに記載の分解性樹脂組成物。
<9> さらに、充填材として、無機充填材及び有機充填材の少なくともいずれかを含む、前記<1>~前記<8>のいずれかに記載の分解性樹脂組成物。
<10> 前記充填材が塩である、前記<9>に記載の分解性樹脂組成物。
<11> 前記塩がアルカリ金属塩である、前記<10>に記載の分解性樹脂組成物。
<12> 前記アルカリ金属塩が水溶性である、前記<11>に記載の分解性樹脂組成物。
<13> 前記充填材が、加水分解性充填材及び溶解性充填材の少なくとも1種、並びに、非分解性充填材を含む、前記<9>~前記<12>のいずれかに記載の分解性樹脂組成物。
<14> 前記シアン酸エステル(A)中のシアナト基[OCN]と前記化合物(B)の水酸基[OH]と、の当量比[OH/OCN]が0.02~1.0である前記<1>~前記<13>のいずれかに記載の分解性樹脂組成物。
<15> 前記分解性樹脂組成物を硬化した硬化物が、加水分解によって分解する分解性硬化物である前記<1>~前記<14>のいずれかに記載の分解性樹脂組成物。
<16> 前記分解性硬化物の加水分解処理前の破断点応力S0に対する加水分解処理(24時間)後の破断点応力S1の維持率が、90%以下である前記<15>に記載の分解性樹脂組成物。
<17> 前記<1>~前記<14>のいずれかに記載の分解性樹脂組成物を硬化してなる、分解性硬化物。
<18> 加水分解によって分解する前記<17>に記載の分解性硬化物。
<19> 前記<17>又は前記<18>に記載の分解性硬化物を含む、掘削用ダウンホールツール。
本実施形態の分解性樹脂組成物は、シアン酸エステル(A)と、水酸基を有し且つ水酸基当量が240g/eq.未満である化合物(B)と、を含む。その他、本実施形態の分解性樹脂組成物は、所望の目的に応じて、充填材、溶媒、その他添加剤を含めることができる。
本実施形態の分解性樹脂組成物は、シアン酸エステル(A)を含む。本実施形態における“シアン酸エステル(A)”は、シアナト基(シアン酸エステル基)が少なくとも1個置換された、芳香族部分を分子内に有する樹脂であり、当該樹脂であれば特に限定せずに用いることができる。
前記“プレポリマー”とは、モノマーの重合又は縮合反応を途中段階で停止させた中間材料であり、且つ、ポリマーとなる前の段階である材料を意味する。前記シアン酸エステルのプレポリマーは、例えば、重量平均分子量(Mw)が160~4000の重合体であることが好ましい。
計算式:
シアネート当量 = シアン酸エステル(A)の重量平均分子量(Mw) ÷ シアン酸エステル(A)のシアナト基基数
シアン酸エステル(A)は、1種単独又は2種以上を混合して用いることができる。
本実施形態の分解性樹脂組成物は、水酸基を有し且つ水酸基当量が240g/eq.未満である化合物(B)を含む。化合物(B)は、シアナト基の反応基として水酸基を含有する化合物であり、その水酸基当量が240g/eq.未満である化合物である。化合物(B)の水酸基当量が240g/eq.未満であると、得られる分解性硬化物の加水分解による分解性の制御を十分に発揮できる。化合物(B)の水酸基当量としては、分解性を制御する観点から、150g/eq.以下が好ましい。また、特に限定されるものではないが、分解性を制御する観点から、化合物(B)の水酸基当量は、18g/eq以上が好ましく、30g/eq.以上が特に好ましい。
計算式(i):
水酸基当量 = 化合物(B)の重量平均分子量(Mw) ÷ 化合物(B)の水酸基基数
二価ポリオールとしては、例えば、エタンジオール、プロパンジオール、プロパントリオール、プロパンテトラオール、ブタンジオール、ブタントリオール、ブタンテトラオール、ペンタンジオール、ペンタントリオール、ペンタンテトラオール、ペンタンペンタオール、ヘキサンジオール、ヘキサントリオール、ヘキサンテトラオール、ヘキサンペンタオール、ヘキサンヘキサオール(構造異性体を含む)等のアルキレングリコール類、このアルキレングリコール類の2分子以上の脱水縮合物(ジエチレングリコール、ジプロピレングリコール、トリプロピレングリコール等)等が挙げられる。
三価ポリオールとしては、例えば、グリセリン、トリメチロールプロパン、トリメチロールエタン、1,2,6-ヘキサントリオール等が挙げられる。
四価アルコールとしては、例えば、ペンタエリスリトール、ジグリセリン等が挙げられる。
多価ポリオールとしては、例えば、ポリビニルアルコールやポリビニルアルコール部分アセタール化物(例えば、ポリビニルホルマール、ポリビニルブチラール等)が挙げられる。
ここで、分解性樹脂組成物中のシアナト基[OCN]と前記化合物(B)の水酸基[OH]との当量比[OH/OCN]は以下のように計算することができる。
〔ポリオール割合(質量%)/水酸基当量〕÷〔シアネート割合(質量%)/シアネート当量〕
=組成物中の化合物(B)の含有量(質量)/組成物中のシアン酸エステル(A)及び化合物(B)の総含有量(質量)
=組成物中のシアン酸エステル(A)の含有量(質量)/組成物中のシアン酸エステル(A)及び化合物(B)の総含有量(質量)
本実施形態の分解性樹脂組成物は、充填材を含めることができる。充填材を含めることにより、得られる硬化物の機械強度や耐熱性を向上させることができる。充填材としては、無機充填材及び有機充填材の少なくともいずれかを含むことができる。
アルカリ金属塩として具体的には、硫酸、塩酸、リン酸、炭酸、ケイ酸、メタケイ酸、オルトケイ酸、酢酸、クエン酸、シュウ酸等の無機酸若しくは有機酸とのアルカリ金属塩である、硫酸リチウム、塩化リチウム、リン酸三リチウム、炭酸リチウム、炭酸水素リチウム、ケイ酸リチウム、メタケイ酸リチウム、オルトケイ酸リチウム、炭酸水素リチウム、酢酸リチウム、クエン酸リチウム、シュウ酸リチウムや;硫酸ナトリウム、亜硫酸ナトリウム、塩化ナトリウム、リン酸三ナトリウム、炭酸ナトリウム、炭酸水素ナトリウム、ケイ酸ナトリウム、メタケイ酸ナトリウム、オルトケイ酸ナトリウム、酢酸ナトリウム、クエン酸ナトリウム、シュウ酸ナトリウムや;硫酸カリウム、亜硫酸カリウム、塩化カリウム、リン酸三カリウム、炭酸カリウム、炭酸水素カリウム、ケイ酸カリウム、メタケイ酸カリウム、オルトケイ酸カリウム、酢酸カリウム、クエン酸カリウム、シュウ酸カリウムなどが挙げられる。
その中でも好ましいものとしては、硫酸ナトリウム、亜硫酸ナトリウム、塩化ナトリウム、ケイ酸ナトリウム、メタケイ酸ナトリウム、酢酸ナトリウム、シュウ酸ナトリウム、硫酸カリウム、亜硫酸カリウム、塩化カリウム、ケイ酸カリウム、メタケイ酸カリウム、酢酸カリウム、シュウ酸カリウムが挙げられる。
有機充填材としては、特に限定されないが、例えば、スチレン型、ブタジエン型、アクリル型などのゴムパウダー、コアシェル型のゴムパウダー、並びにシリコーンレジンパウダー、シリコーンゴムパウダー、シリコーン複合パウダーなどが挙げられる。
これらの充填材は、シランカップリング剤などで表面処理されていてもよい。
充填材のアスペクト比は、電子顕微鏡(SEM)により測定した1000個の太さ及び長さの平均値から求めることができる。
繊維状の充填材は粉体中で単分散して混合されていることが好ましいが、繊維状の充填材が互いに絡まった状態や、複数の繊維状の充填材が同一方向で揃った束の状態で混合されていてもよい。また、単分散状態において、繊維状の充填材の向きが同一方向で揃った状態であってもよい。
充填材の粒子径が0.1μmより小さい場合、単分散が困難となる可能性がある。また、充填材の粒子径が500μmより大きい場合、充填材の強度が低いと樹脂組成物としての強度が低下する恐れがある。充填材の分散性及び樹脂組成物の強度低下の観点から、粒子径は0.1μm~400μmのものがさらに好ましく、0.1μm~300μmのものが特に好ましい。
また、充填材の形状別の観点からは、特に限定はないが、板状の充填材の場合には、平均長さが0.1μm~30μm程度が好ましい。また、粒状の充填材の場合には、粒径が0.1μm~50μm以下であることが好ましい。
以下、分解性硬化物中の樹脂中の結合を切断、又は、充填材自体が分解又は溶解することで分解性硬化物等の分解を促進することができる充填材を“樹脂分解促進性充填材”と称することがある。本実施形態の分解性硬化物等において、樹脂中の結合等が失われると、分解性硬化物中の機械的結合や、化学的相互作用、物理的相互作用による結合状態が失われ、作製初期の分解性硬化物に対し重量減少や機械強度の低下が生じる。
上述のように、本明細書において、加水分解性を有し、且つ、その加水分解物が酸性又は塩基性となる充填材を“加水分解性充填材”と称することがある。また、加水分解性充填材を用いて硬化物中の樹脂の分解速度を高めるためには、当該充填材の加水分解物の酸性又は塩基性が強いほうが好ましい。
さらに、加水分解性充填材を用いて本実施形態の硬化物の分解速度を高めるためには、当該硬化物中の樹脂の加水分解物の酸性又は塩基性も強いことが好ましい。
加水分解物が酸性又は塩基性となる加水分解性充填材としては、シュウ酸ナトリウム、ケイ酸ナトリウム、メタケイ酸ナトリウムなどを用いることができる。これら加水分解性充填材は、特に加水分解物の酸性・塩基性が高いため、樹脂をより早く分解できる点で好ましい。
非分解性充填材としては、25℃の環境下で水100mLに試料15gを沈め、その後100℃にまで昇温し場合、4時間経過した後であっても、加水分解及び溶解しない充填材であることが好ましい。ここで、“加水分解及び溶解しない充填材”とは、上述の4時間経過後に充填材の乾燥質量が1質量%以上減らないことを意味する。
非分解性充填材としては、特に限定されるものではないが、例えば、上述の天然シリカ、溶融シリカ、合成シリカ、アモルファスシリカ、アエロジル、中空シリカ等のシリカ類、ホワイトカーボン、チタンホワイト、酸化亜鉛、酸化マグネシウム、酸化ジルコニウム等の酸化物、窒化ホウ素、凝集窒化ホウ素、窒化ケイ素、窒化アルミニウム、硫酸バリウム、水酸化アルミニウム、水酸化アルミニウム加熱処理品(水酸化アルミニウムを加熱処理し、結晶水の一部を減じたもの)、ベーマイト、水酸化マグネシウム等の金属水和物、酸化モリブデンやモリブデン酸亜鉛等のモリブデン化合物、ホウ酸亜鉛、錫酸亜鉛、アルミナ、クレー、カオリン、タルク、焼成クレー、焼成カオリン、焼成タルク、マイカ、E-ガラス、A-ガラス、NE-ガラス、C-ガラス、L-ガラス、D-ガラス、S-ガラス、M-ガラスG20、ガラス繊維(Eガラス、Tガラス、Dガラス、Sガラス、Qガラス等のガラス微粉末類を含む。)、中空ガラス、球状ガラス、ソーダガラス、スチレン型、ブタジエン型、アクリル型などのゴムパウダー、コアシェル型のゴムパウダー、並びにシリコーンレジンパウダー、シリコーンゴムパウダー、シリコーン複合パウダーなどが挙げられる。これらの充填材は、シランカップリング剤などで表面処理されていてもよい。
本実施形態における分解性樹脂組成物の調製方法としては、公知の坑井掘削用に用いられる樹脂組成物の調製方法を利用することができる。例えば、上述のシアン酸エステル(A)、化合物(B)、必要に応じて、一括して又はいくつかに区分して、常温で又は加熱下に混合することにより調製する。混合に際してはせん断力を与えてもよく、また、組成成分の全部又は一部を加熱下に溶融混合してもよい。取り扱いの利便性等を考慮して、ペレットを調整してもよい。本実施形態に係る坑井掘削用分解性樹脂組成物をより高い耐衝撃性等を有するものとすることができる観点から、高せん断下に混練することが望ましい。高せん断下に混練する装置としては、二軸混練押出機等を使用することができる。
本実施形態における分解性樹脂組成物は、本実施形態の目的を阻害しない範囲で、他の配合成分として、鎖延長剤、安定剤、分解促進剤又は分解抑制剤、強化材又は顔料等の着色剤、可塑剤、核剤などの各種添加剤や、分解性樹脂等の他の樹脂材料や耐衝撃性改良剤を含有させてもよい。
他の配合成分の含有量は、それぞれの種類及び目的等に応じて適宜定めることができる。分解性樹脂組成物は、さらに、樹脂改良剤、炭酸亜鉛、炭酸ニッケル等の金型腐食防止剤、滑剤、紫外線吸収剤、ボロンナイトライド等の核剤、難燃剤などを適宜添加することができ、これらの含有量や配合方法は、先の説明に準ずることができる。
本実施形態の分解性硬化物は、例えば、シート状(薄いフィルム状、厚板状等)、棒状(丸棒状、角柱状等)、直方体状(立方状を含む)、塊状(定形、不定形等)などの形状でもよいし、所定の形状を有する成形体でもよい。分解性硬化物がシート状であったり、シーリング材又はパッキング材(詰め物様)である場合は、所定の形状を有する成形体でなくてもよい。
掘削用ダウンホールツールの形状やサイズ、特に限定されないが、坑井孔の閉塞用途に用いられることが好ましい。掘削用ダウンホールツールの形状としては、ボール(ボールシーラー)やボールシートの他、ブリッジプラグの部材として知られているマンドレル、スリップ、ウエッジ及びリング等が挙げられる。また、掘削用ダウンホールツールのサイズは、坑井孔などに応じて適宜選定することができる。
上述のように、例えば、水圧粉砕方法においては、坑井孔に対して効率よく亀裂等を生じさせるために、坑井孔の一部を閉塞することが行われる。本実施形態の掘削用ダウンホールツールは、このような坑井孔の閉塞用途に用いられることが好ましい。この場合、まずは、本実施形態の掘削用ダウンホールツール(例えば、ボール形状)が坑井孔の所定部位に配置される。これにより、掘削用ダウンホールツールと坑井孔(ダウンホール)との間の空間が閉塞され、地上から流体を注入されるフラクチャリング流体を所定の区画内に塞き止めることができる。坑井孔に亀裂等を生じさせる諸区画のフラクチャリング等の坑井処理が終了した後、次区間の処理を始める前に、又は、遅くとも石油や天然ガス等の生産を開始する前には、坑井孔を閉塞している掘削用ダウンホールツールを除去する必要がある。本実施形態の掘削用ダウンホールツールは、フラクチャリング流体により加水分解が進み所定の時間後に破断点応力が低下するように設計されている。このため、所望の時間経過後にフラクチャリング流体の水圧によって分解(小片化)する程度に掘削用ダウンホールツールの破断点応力が低下するように設計することで、坑井処理終了後に容易に掘削用ダウンホールツールを分解して除去することができる。
この結果、本実施形態の坑井掘削方法によれば、従来、坑井処理の終了後又は坑井完成後に、坑井内に残置されていた多数の坑井掘削用ダウンホールツールを除去、回収したり、破砕、穿孔その他の方法によって、破壊したり、小片化したりするために要していた多くの経費と時間が不要となるので、坑井掘削の経費軽減や工程短縮ができる。
掘削用ダウンホールツール(分解性硬化物)の加水分解速度の制御(破断点応力の変動幅(維持率)の制御)は、シアン酸エステル(A)及び化合物(B)の種類や化合物(B)の水酸基当量などを調整することによって行うことができる。
なお、本実施形態の分解性硬化物(掘削用ダウンホールツール)の分解に関しては、フラクチャリング流体と別の条件で分解用に他の流体を別途注入してもよい。
(分解性樹脂組成物の調製)
撹拌機を備えた容積500ミリリットルの樹脂製容器に、脂肪族ポリオールとして、トリメチロールプロパン(富士フイルム和光純薬(株)製)10.0gを加え、シアン酸エステル化合物として、2,2-ビス(4-シアナトフェニル)プロパン(シアネート当量139)のプレポリマー(三菱ガス化学(株)製、CA210(製品名))90.0gを加え、オクチル酸亜鉛を0.03g加え、メチルエチルケトン(以下、“NEK”と称することがある。)で希釈し、室温で撹拌することでワニス(分解性樹脂組成物の溶液)を得た。ワニスを170℃で加熱乾燥して、MEKを除去した分解性樹脂組成物を得た。
トリメチロールプロパンを5.0g、CA210を95.0g、オクチル酸亜鉛を0.01gに変更した以外は、実施例1と同様に分解性樹脂組成物を調製した。
トリメチロールプロパンの代わりに、脂肪族ポリオールとして、1,4-シクロヘキサンジオール(東京化成工業(株)製)を10.0g用い、CA210を90.0g、オクチル酸亜鉛を0.01gに変更した以外は、実施例1と同様に分解性樹脂組成物を調製した。
トリメチロールプロパンの代わりに、芳香族ポリオールとして、2,2’-ビス(4-ヒドロキシフェニル)プロパン(ビスフェノールA)を10.0g用い、CA210を90.0g、オクチル酸亜鉛を0.01gに変更した以外は、実施例1と同様に分解性樹脂組成物を調製した。
トリメチロールプロパンの代わりに、トリアルカノールアミンとして、トリイソプロパノールアミン(東京化成工業(株)製)を5.1g用い、CA210を94.9g、オクチル酸亜鉛を用いなかった以外は、実施例1と同様に分解性樹脂組成物を調製した。
ポリオールを添加せず、CA210を100.0g、オクチル酸亜鉛を0.025gに変更した以外は、実施例1と同様に分解性樹脂組成物を調製した。
水酸基当量240g/eq.以上の芳香族ポリオールとして、ビスフェノールAエポキシアクリレート(日本ユピカ(株)製)を10.0g、CA210を90.0g、オクチル酸亜鉛を0.015gに変更した以外は、実施例1と同様に分解性樹脂組成物を調製した。
得られた分解性樹脂組成物をSUS304製の型に充填し、プレス成型機にて圧力30kgf/cm2、温度220℃で90分間硬化させた。硬化後にSUS304製の型を外して硬化板を得た。
得られた分解性硬化物から、50mm×10mm×1.5mm、若しくは40mm×10mm×1.5mmのサンプル(分解性硬化物)を切り出し、各種測定を行った。
得られたサンプル(分解性硬化物)を対象とし、JIS K 6911の手法にて、25℃での破断点応力を測定した。
得られたサンプル(分解性硬化物)を、SUS304製のバットに並べ、プレッシャークッカー試験器(平山製作所(株)製、型式:PC242HS)を用いて、121℃、2atm(飽和水蒸気雰囲気)で各々のサンプルに応じて所定時間(12時間、24時間、48時間)加水分解処理を行った(以下、PCT処理と省略して記載する)。
所定時間経過後に取り出し、上述の3点曲げ破断点応力測定を実施し、0時間時の破断点応力を100とした場合の維持率(%)を算出した。例えば、サンプルの加水分解処理前(即ち、0時間時の破断点応力)の破断点応力S0に対する加水分解処理(24時間)後の破断点応力S1の維持率は、維持率(%)=(S1×100)/S0より得ることができる。
プラネタリーミキサー(プライミクス社製、型番:ハイビスミックス2P-03)に、シアン酸エステル化合物として、2,2-ビス(4-シアナトフェニル)プロパン(シアネート当量139)のプレポリマー(三菱ガス化学(株)製、TA-1500(製品名))を95.0g加え、80℃で攪拌して溶融させた後、充填材は添加せずに、トリアルカノールアミンとして、トリイソプロパノールアミン(東京化成工業(株)製)5.0gを加え、80℃で攪拌することで分解性樹脂組成物を調製した。
充填材としてケイ酸ナトリウム((株)トクヤマ製、プリフィード粉末品、平均粒子径73μm)を17.6g(充填材:組成物中の充填材以外の成分=15:85(質量比))を加えた以外は、実施例6と同様に分解性樹脂組成物を調製した。
充填材としてケイ酸ナトリウム((株)トクヤマ製、プリフィード粉末品、平均粒子径73μm)を66.7g(充填材:組成物中の充填材以外の成分=40:60(質量比))を加えた以外は、実施例6と同様に分解性樹脂組成物を調製した。
充填材としてケイ酸ナトリウム((株)トクヤマ製、プリフィード粉末品、平均粒子径73μm)を17.6g、ガラス繊維(日東紡(株)製、製品番号:SS15-404、ミルドファイバー、繊維径平均11μm、繊維長平均500μm、アスペクト比45、繊維表面シラン処理)34.6g(ケイ酸ナトリウム:ガラスファイバー:組成物中の充填材以外の成分=15:25:60(質量比))を加えた以外は、実施例6と同様に分解性樹脂組成物を調製した。
充填材としてガラス繊維(日東紡(株)製、製品番号:SS15-404、ミルドファイバー、繊維径平均11μm、繊維長平均500μm、アスペクト比45、繊維表面シラン処理)34.6g(充填材:組成物中の充填材以外の成分=15:85(質量比))を加えた以外は、実施例6と同様に分解性樹脂組成物を調製した。
充填材として塩化カリウム(大塚化学(株)製、平均粒子径1.2mm)を粉砕機で処理した試料(平均粒子径112μm)66.7g(充填材:組成物中の充填材以外の成分=40:60(質量比))を加えた以外は、実施例6と同様に分解性樹脂組成物を調製した。
得られた分解性樹脂組成物をSUS304製の型に充填し、プレス成型機にて圧力30kgf/cm2、温度220℃で90分間硬化させた。硬化後にSUS304製の型を外して硬化板を得た。
得られた分解性硬化物から、40mm×10mm×1.5mm及び10mm×10mm×3.5mmのサンプル(分解性硬化物)を切り出し、各種測定を行った。
得られたサンプル(分解性硬化物)10mm×10mm×3.5mmを対象とし、JIS K 7181の手法にて圧縮強度を測定し、得られた圧縮強度の平均値(N=5)を算出した。
得られたサンプル(分解性硬化物)40mm×10mm×1.5mmを、テフロン(登録商標)内筒密閉容器(耐圧硝子工業(株)製(型式TAF-SR))に入れ、蒸留水15mLを加えて密閉し、149℃(300°F)の恒温槽にて24時間加熱処理を行った。
所定時間後に取り出し、穴径3μmのメンブレンフィルター(ADVANTEC製)を用いてろ過を行い、残渣を100℃、6時間、真空乾燥を行うことで乾燥質量を算出した。
質量維持率(%)=(乾燥質量/加熱処理前サンプル質量)×100
また、明細書に記載された全ての文献、特許出願、及び技術規格は、個々の文献、特許出願、及び技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。
Claims (18)
- シアン酸エステル(A)と、
水酸基を有し且つ水酸基当量が240g/eq.未満である化合物(B)と、
を含む、分解性樹脂組成物。 - 前記化合物(B)が、一分子中に2以上の水酸基を有するポリオールを含む、請求項1に記載の分解性樹脂組成物。
- 前記化合物(B)が、アルコール性水酸基を有する化合物、フェノール性水酸基を有する化合物、並びに、アルコール性水酸基及びフェノール性水酸基を有する化合物から選ばれる、少なくとも一種以上を含む、請求項1又は請求項2に記載の分解性樹脂組成物。
- 前記化合物(B)が、脂肪族ポリオール(b1)、脂環式ポリオール(b2)、芳香族ポリオール(b3)、トリアルカノールアミン(b4)から選ばれる群のうち、いずれか一種以上を含む、請求項1~請求項3のいずれか一項に記載の分解性樹脂組成物。
- 前記脂肪族ポリオール(b1)が、エタンジオール、プロパンジオール、プロパントリオール、プロパンテトラオール、ブタンジオール、ブタントリオール、ブタンテトラオール、ペンタンジオール、ペンタントリオール、ペンタンテトラオール、ペンタンペンタオール、ヘキサンジオール、ヘキサントリオール、ヘキサンテトラオール、ヘキサンペンタオール、ヘキサンヘキサオール、ジグリセロール、ジトリメチロールプロパン、トリトリメチロールプロパン、ジネオペンチルグリコール、ジペンタエリスリトール、トリペンタエリスリトール、ポリビニルアルコール及びポリビニルアセタールから選ばれる群のうち、いずれか一種以上を含む、請求項4に記載の分解性樹脂組成物。
- 前記脂環式ポリオール(b2)が、シクロペンタンジオール、シクロペンタントリオール、シクロペンタンテトラオール、シクロペンタンペンタオール、シクロヘキサンジオール、シクロヘキサントリオール、シクロヘキサンテトラオール、シクロヘキサンペンタオール、シクロヘキサンヘキサオール、水素添加ビスフェノールA、水素添加ビスフェノールB、水素添加ビスフェノールC、水素添加ビスフェノールE、水素添加ビスフェノールF、デカヒドロナフタレンジオール、デカヒドロナフタレントリオール、デカヒドロナフタレンテトラオール、から選ばれる群のうち、いずれか一種以上を含む、請求項4又は請求項5に記載の分解性樹脂組成物。
- 前記芳香族ポリオール(b3)が、ジヒドロキシベンゼン、トリヒドロキシベンゼン、テトラヒドロキシベンゼン、ペンタヒドロキシベンゼン、ヘキサヒドロキシベンゼン、ビスフェノールA、ビスフェノールB、ビスフェノールC、ビスフェノールE、ビスフェノールF、ジヒドロキシビフェニル、ナフタレンジオール、ナフタレントリオール、ナフタレンテトラオール、から選ばれる群のうち、いずれか一種以上を含む、請求項4~請求項6のいずれか一項に記載の分解性樹脂組成物。
- 前記トリアルカノールアミン(b4)が、トリメタノールアミン、トリエタノールアミン、トリプロパノールアミン、トリイソプロパノールアミン及びトリブタノールアミンから選ばれる群のうち、いずれか一種以上を含む、請求項4~請求項7のいずれか一項に記載の分解性樹脂組成物。
- さらに、充填材として、無機充填材及び有機充填材の少なくともいずれかを含む、請求項1~請求項8のいずれか一項に記載の分解性樹脂組成物。
- 前記充填材が塩である、請求項9に記載の分解性樹脂組成物。
- 前記塩がアルカリ金属塩である、請求項10に記載の分解性樹脂組成物。
- 前記アルカリ金属塩が水溶性である、請求項11に記載の分解性樹脂組成物。
- 前記充填材が、加水分解性充填材及び溶解性充填材の少なくとも1種、並びに、非分解性充填材を含む、請求項9~請求項12のいずれか一項に記載の分解性樹脂組成物。
- 前記シアン酸エステル(A)中のシアナト基[OCN]と前記化合物(B)の水酸基[OH]と、の当量比[OH/OCN]が0.02~1.0である、請求項1~請求項13のいずれか一項に記載の分解性樹脂組成物。
- 前記分解性樹脂組成物を硬化した硬化物が、加水分解によって分解する分解性硬化物である請求項1~請求項14のいずれか一項に記載の分解性樹脂組成物。
- 請求項1~請求項14のいずれか一項に記載の分解性樹脂組成物を硬化してなる、分解性硬化物。
- 加水分解によって分解する、請求項16に記載の分解性硬化物。
- 請求項16又は17に記載の分解性硬化物を含む、掘削用ダウンホールツール。
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CN202080010356.7A CN113330053A (zh) | 2019-02-01 | 2020-02-03 | 分解性树脂组合物、分解性固化物和挖掘用井下工具 |
US17/426,732 US20220098369A1 (en) | 2019-02-01 | 2020-02-03 | Degradable resin composition, degradable cured product and downhole tool for drilling |
JP2020568649A JPWO2020158956A1 (ja) | 2019-02-01 | 2020-02-03 | 分解性樹脂組成物、分解性硬化物、及び、掘削用ダウンホールツール |
CA3128162A CA3128162A1 (en) | 2019-02-01 | 2020-02-03 | Degradable resin composition, degradable cured product and downhole tool for drilling |
EP20749789.2A EP3919547A4 (en) | 2019-02-01 | 2020-02-03 | DEGRADABLE RESIN COMPOSITION, DEGRADABLE CURED ARTICLE, AND DOWN-THE-WAY TOOL FOR DRILLING |
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WO2022040076A1 (en) * | 2020-08-17 | 2022-02-24 | Baker Hughes Oilfield Operations Llc | Manufacture of degradable polycyanurate bulk molding compositions |
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Also Published As
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EP3919547A4 (en) | 2022-04-20 |
JPWO2020158956A1 (ja) | 2021-12-02 |
EP3919547A1 (en) | 2021-12-08 |
CA3128162A1 (en) | 2020-08-06 |
US20220098369A1 (en) | 2022-03-31 |
CN113330053A (zh) | 2021-08-31 |
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