CN106566490A - Oil-based drilling fluid shear strength-improving agent with aluminum phosphate structure and preparation method thereof - Google Patents
Oil-based drilling fluid shear strength-improving agent with aluminum phosphate structure and preparation method thereof Download PDFInfo
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- CN106566490A CN106566490A CN201610936851.6A CN201610936851A CN106566490A CN 106566490 A CN106566490 A CN 106566490A CN 201610936851 A CN201610936851 A CN 201610936851A CN 106566490 A CN106566490 A CN 106566490A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- 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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
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Abstract
The invention relates to an oil-based drilling fluid shear strength-improving agent with an aluminum phosphate structure and a preparation method thereof. The preparation method comprises the steps of firstly, enabling hydroxyl-containing unsaturated monomers, alkyl alcohol, phosphorus pentoxide and oil soluble unsaturated monomers to perform esterification and polymerization reaction under the condition that an initiator exists, so as to obtain a mixture of alkyl phosphate and a polymer with a phosphate ester structure; and then, with aluminium salt adopted as a cross-linking agent, carrying out coordination cross-linking on phosphate ester in the mixture, so as to obtain the oil-based drilling fluid shear strength-improving agent with the aluminum phosphate structure. The molecular weight of the polymer component in the shear strength-improving agent can be controlled, an intermolecular network structure is formed under strong coordination cross-linking action of phosphate ester and aluminium salt in the molecules, the dosage of a product is low, the shear strength improving effect is excellent, and the influence on plastic viscosity of a drilling fluid is relatively small.
Description
Technical field
The present invention relates to a kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure and preparation method thereof, belongs to brill
Well chemistry and field of engineering technology.
Background technology
Oil base drilling fluid expands and stratum pulping in wellbore stability, lubrication anti-sticking, suppression Shale Hydration, and fast drilling
Etc. aspect have a clear superiority, it has also become probing high temperature deep well, high-inclination directional well, horizontal well, offshore drilling, various complicated bore
The important means of well section and reservoir protection.Oil base drilling fluid generally existing viscosity is higher and the low deficiency of shear force so that oil base
Drilling fluid suspension is poor, is unfavorable for the preparation of suspension drilling cuttings, weighting material and VHD oil base drilling fluid, and in oil base
During drilling fluid use, it has been found that under conditions of control plastic viscosity is needed, the raising of shear force is very difficult.Therefore,
Shear force is one of the crucial rheological parameter for determining oil base drilling fluid performance, directly influences that to take rock, anti-settling, equivalent circulation close
Degree, exciting and swabbing pressure etc., only suitable control shear force simultaneously keep stable, could successfully drill Holes of Complicated Wells.
Chinese patent literature CN105038734A discloses a kind of oil base drilling fluid extracting and cutting agent and preparation method thereof, described
Extracting and cutting agent is prepared from by the raw material of following percentage by weight：50%～80% solvent, 15%～35% myristic acid,
5%～15% stearate, the raw material stirs 1h in 60～70 DEG C, is cooled to room temperature, completes oil base drilling fluid and is cut with carrying
The preparation of agent.This extracting and cutting agent for preparing of invention is little to the viscosity influence of oil base drilling fluid, and formula is easy, heat-resisting property compared with
It is good.
Chinese patent literature CN105623625A discloses a kind of oil base drilling fluid extracting and cutting agent and preparation method thereof.The side
Method comprises the steps：Maleic anhydride and styrene carry out polyreaction in the presence of solvent and initiator and are mixed
Thing；The mixture for obtaining reacts in the presence of alcohol compound and catalyst and obtains extracting and cutting agent crude product；The extracting and cutting agent for obtaining is thick
Product are removed to be crushed after organic solvent, drying, obtains final product described oil base drilling fluid extracting and cutting agent.The extracting and cutting agent of this invention synthesis both had
Long linear alkyl simultaneously contains substantial amounts of polar group, and chain alkyl forms netted knot in oil base drilling fluid by association
Structure, and molecule polar groups are interacted by electrostatic attraction or hydrogen bond and other groups, forms big netted of specific surface area
Structure, effectively raises the yield value of drilling fluid.
But, the interaction between above-mentioned extracting and cutting agent molecule is with Van der Waals force, hydrogen bond equimolecular Interaction Force
It is main, the intensity of these active forces well below Coordinative Chemistry key intensity, therefore, effect one is cut in carrying for such extracting and cutting agent product
As, it is difficult to play a part of " carry cutting and do not viscosify ".
The content of the invention
For the deficiencies in the prior art, the present invention provides a kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure
And preparation method thereof.An object of the present invention is to provide a kind of plastic viscosity on system affects less, carries and cuts effect substantially,
Good with other additive for drilling fluid compatibilities, raw material sources are wide, the extracting and cutting agent that molecular weight is easily controlled；The two of purpose are to provide conjunction
Into simple for process, high conversion rate, the simple preparation method of product postprocessing.
Technical scheme is as follows：
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
1～100,000；The extracting and cutting agent is that phosphate compound and aluminium salt are reacted at 50～80 DEG C the product that 1～5h is obtained.
A kind of preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, including step is as follows：
(1) synthesis of phosphate compound
The unsaturated monomer of hydroxyl, alkylol, the mixing of oil-soluble unsaturated monomer are stirred to molten at 30～50 DEG C
Melt；Inert atmosphere, under stirring condition, adds phosphorus pentoxide and initiator, obtains reactant liquor；At 50～100 DEG C reaction 2～
10h, obtains the mixture of alkyl phosphate and the polymer with phosphate ester structure；
The unsaturated monomer of the hydroxyl is N hydroxymethyl acrylamide, N- hydroxyethyl acrylamides, acrylic acid hydroxyl second
One or more kinds of mixture in ester or hydroxyethyl methylacrylate；The oil-soluble unsaturated monomer is benzene second
Alkene, caprolactam, acrylic acid hexyl ester, acrylic acid octyl group ester, decyl acrylate, dodecylacrylate, third
One or more kinds of mixture in olefin(e) acid cetyl ester or octadecyl acrylate；
(2) preparation of oil base drilling fluid extracting and cutting agent
The mixture that step (1) is obtained is taken, is stirred to melting at 50～60 DEG C；Under stirring condition, aluminium salt is added, must be mixed
Liquid；The pH value for adjusting mixed liquor is 7～10, and 1～5h is reacted at 50～80 DEG C；Drying, crushing, obtain oil base drilling fluid with carrying
Cut agent.
, according to the invention it is preferred to, the mass concentration of the unsaturated monomer of hydroxyl is 20 in step (1) reactant liquor
～50g/L, the mass concentration of alkylol is 500～800g/L, and the mass concentration of oil-soluble unsaturated monomer is 150～300g/
L, the mass concentration of phosphorus pentoxide is 50～160g/L, and the mass concentration of initiator is 0.1～5g/L.
, according to the invention it is preferred to, alkylol is hexanol, capryl alcohol, lauryl alcohol, hexadecanol or 18 in the step (1)
One or more mixture in alcohol.
, according to the invention it is preferred to, initiator is azodiisobutyronitrile, 2,2'-Azobis(2,4-dimethylvaleronitrile), azo in the step (1)
Dicyclohexyl formonitrile HCN, dibenzoyl peroxide, the peroxidating trimethylacetic acid tert-butyl ester or di-cyclohexylperoxy di-carbonate.
, according to the invention it is preferred to, reaction temperature is 50～80 DEG C in the step (1), and the response time is 3～6h.
, according to the invention it is preferred to, inert atmosphere is nitrogen, argon or helium atmosphere in the step (1).
, according to the invention it is preferred to, the mass concentration of aluminium salt is 40～120g/L in step (2) mixed liquor.
, according to the invention it is preferred to, aluminium salt is aluminum chloride, aluminum nitrate or aluminum sulfate in the step (2).
, according to the invention it is preferred to, the pH value of mixed solution is adjusted in the step (2) with ammonia；Preferably, the step
Suddenly the pH value that mixed solution is adjusted in (2) is 7.5～9.
The principle of the present invention：
Oil base drilling fluid extracting and cutting agent prepared by the present invention has with carbon-carbon bond as main chain, hydrocarbon structure and phosphate ester structure
For the polymers compositionss of side chain, the component oleophylic function admirable, can be well dissolved in oil phase；Stable chemical nature, tool
There is excellent heat-resisting property；Molecular size range is controllable, affects less to the plastic viscosity of system.Therefore, in oil phase, the polymerization
Thing component can be used as the basic components for building intermolecular grid structure.Meanwhile, aluminium ion component, these aluminum are contained in extracting and cutting agent
Ion can form under suitable conditions the structure of multinuclear aluminum ol bridge, and the structure can form coordinate bond with multiple phosphate esters,
So as to play crosslink polymer molecules, the effect of intermolecular net structure is formed.The intensity of this coordination cross-linked effect is remote
The intermolecular force conventional more than Van der Waals force, hydrogen bond etc., meanwhile, its heat resistance is also better than conventional intermolecular interaction
Power.Therefore, this product shows that dosage is few, carries and the feature such as cut excellent effect, affect little, heat resistance excellent on plastic viscosity.
The invention has the advantages that：
(1) the oil base drilling fluid extracting and cutting agent prepared by has the structure of aluminium phosphate, by the phosphate ester in molecule and
The strong coordination cross-linked effect of aluminium salt and form intermolecular net structure, the consumption of product is little, carries and cuts excellent effect.
(2) oil base drilling fluid prepared by is controllable with the molecular weight of polymers compositionss in extracting and cutting agent product, to system plasticity
The impact of viscosity is less.
(3) the oil base drilling fluid extracting and cutting agent prepared by is good with other additive for drilling fluid compatibilities.
(4) the oil base drilling fluid extracting and cutting agent prepared by has network structure, and heat-resisting property is excellent.
(5) extensively, cheap, preparation process is simple is easy to the raw material sources of the oil base drilling fluid extracting and cutting agent prepared by
Operation.
(6) using for the oil base drilling fluid extracting and cutting agent prepared by is safe, environmentally safe.
Above-mentioned various features show that the present invention is adapted to commercial production, and is with a wide range of applications.
Description of the drawings
Fig. 1 is the infared spectrum of oil base drilling fluid extracting and cutting agent prepared by embodiment 1.
Specific embodiment
With reference to specific embodiment, the present invention is described further, but not limited to this.
Simultaneously experimental technique described in following embodiments, if no special instructions, is conventional method；The reagent and material
Material, if no special instructions, commercially obtains.
Embodiment 1
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
7.6 ten thousand.
Preparation process is as follows：
(1) synthesis of phosphate compound
Successively by 23g N- hydroxyethyl acrylamides, 400g octadecanol, 95g styrene is added to equipped with agitator, logical nitrogen
In the wolf bottle of pipe and thermometer, it is placed in 50 DEG C of water bath with thermostatic control and stirs to melting, is slow added into the oxidations of 52g five two
Phosphorus, stirs and is passed through nitrogen, adds 1.5g azodiisobutyronitriles, stirs to obtain reactant liquor；And temperature is risen to into 55 DEG C, the response time
For 4h, reaction terminating, the mixture of alkyl phosphate and the polymer with phosphate ester structure is obtained；
The mass concentration of N- hydroxyethyl acrylamides is 43g/L in the reactant liquor, and the mass concentration of octadecanol is 756g/
L, cinnamic mass concentration is 180g/L, and the mass concentration of phosphorus pentoxide is 98g/L, the mass concentration of azodiisobutyronitrile
For 2.8g/L.
(2) preparation of extracting and cutting agent
Take mixture 300g in step (1) in beaker, to be placed in 55 DEG C of waters bath with thermostatic control and stir to melting, stirring condition
Under, 30g aluminum nitrates are slowly added to, obtain mixed liquor；The mass concentration of aluminum nitrate is 98g/L in the mixed liquor；Adjusted with ammonia again
The pH value of section mixed liquor is 8.6, and system temperature risen to into 60 DEG C, and the response time is 2h, reaction terminating, product drying, is crushed,
Obtain oil base drilling fluid extracting and cutting agent.
Fig. 1 is the infared spectrum of oil base drilling fluid extracting and cutting agent manufactured in the present embodiment.It will be seen from figure 1 that 857cm-1
It is the characteristic absorption peak containing aluminium ion component, 724cm-1And 1467cm-1For the characteristic absorption peak of phenyl ring, 1083cm-1With
1221cm-1For the characteristic absorption peak of phosphate ester structure, 1579cm-1For the characteristic absorption peak of carbonyl, 2850cm-1And 2921cm-1For
The characteristic absorption peak of alkyl.As can be seen here, by two-step reaction, gained oil base drilling fluid extracting and cutting agent has lipophilic polymer group
Point, bound phosphate groups and component containing aluminium ion.
Embodiment 2
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
3.7 ten thousand.
Preparation process such as embodiment 1, except that reaction temperature is 75 DEG C in step (1), the response time is 5h.
Embodiment 3
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
4.3 ten thousand.
Preparation process such as embodiment 1, except that alkylol is hexadecanol in step (1).
Embodiment 4
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
7.2 ten thousand.
Preparation process such as embodiment 1, except that step (1) oil-soluble monomer is octadecyl acrylate.
Embodiment 5
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
5.6 ten thousand.
Preparation process such as embodiment 1, except that aluminium salt is aluminum chloride in step (2), dosage is 20g, the mixing
The mass concentration of aluminum chloride is 68g/L in liquid.
Embodiment 6
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
8.8 ten thousand.
Preparation process is as follows：
(1) synthesis of phosphate compound
Successively by 10g N- hydroxyethyl acrylamides, 152g lauryl alcohols, 55g aliphatic acrylates are added to be equipped with and stir
In mixing the wolf bottle of device, logical nitrogen pipe and thermometer, it is placed in 40 DEG C of waters bath with thermostatic control and stirs to melting, is slow added into 25g
Phosphorus pentoxide, stirs and is passed through nitrogen, adds 0.2g azodiisobutyronitriles, stirs to obtain reactant liquor；And temperature is risen to into 50 DEG C,
Response time is 3h, and reaction terminating obtains the mixture of alkyl phosphate and the polymer with phosphate ester structure；
The mass concentration of N- hydroxyethyl acrylamides is 44g/L in the reactant liquor, and the mass concentration of lauryl alcohol is 667g/
L, the mass concentration of aliphatic acrylate is 241g/L, and the mass concentration of phosphorus pentoxide is 110g/L, the isobutyl of azo two
The mass concentration of nitrile is 0.9g/L.
(2) preparation of extracting and cutting agent
Take mixture 300g in step (1) in beaker, to be placed in 50 DEG C of waters bath with thermostatic control and stir to melting, stirring condition
Under, 25g aluminum sulfate is slowly added to, obtain mixed liquor；The mass concentration of aluminum nitrate is 82g/L in the mixed liquor；Adjusted with ammonia again
Section system pH is 7.5, and system temperature risen to into 60 DEG C, and the response time is 3h, reaction terminating, product drying, is crushed, and obtains oily
Base drilling fluid extracting and cutting agent.
Embodiment 7
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
1.8 ten thousand.
Preparation process is as follows：
(1) synthesis of phosphate compound
Successively by 35g 2-(Acryloyloxy)ethanols, 550g octadecanol, 145g styrene be added to equipped with agitator, logical nitrogen pipe and
In the wolf bottle of thermometer, it is placed in 50 DEG C of waters bath with thermostatic control and stirs to melting, be slow added into 100g phosphorus pentoxides, stirs
Nitrogen is mixed and be passed through, 3.5g azodiisobutyronitriles are added, reactant liquor is stirred to obtain；And temperature is risen to into 90 DEG C, the response time is 6h,
Reaction terminating, obtains the mixture of alkyl phosphate and the polymer with phosphate ester structure；
The mass concentration of 2-(Acryloyloxy)ethanol is 46g/L in the reactant liquor, and the mass concentration of octadecanol is 720g/L, benzene
The mass concentration of ethylene is 189g/L, and the mass concentration of phosphorus pentoxide is 130g/L, and the mass concentration of azodiisobutyronitrile is
4.6g/L。
(2) preparation of extracting and cutting agent
Take mixture 300g in step (1) in beaker, to be placed in 60 DEG C of waters bath with thermostatic control and stir to melting, stirring condition
Under, 35g aluminum chloride is slowly added to, obtain mixed liquor；The mass concentration of aluminum nitrate is 114g/L in the mixed liquor；Adjusted with ammonia again
Section system pH is 8.5, and system temperature risen to into 80 DEG C, and the response time is 5h, reaction terminating, product drying, is crushed, and obtains oily
Base drilling fluid extracting and cutting agent.
Embodiment 8
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
2.2 ten thousand.
Preparation process is as follows：
(1) synthesis of polymer
Successively by 25g N hydroxymethyl acrylamides, 420g hexadecanol, 100g dodecylacrylates are added to and are equipped with
In the wolf bottle of agitator, logical nitrogen pipe and thermometer, it is placed in 45 DEG C of waters bath with thermostatic control and stirs to melting, is slow added into
70g phosphorus pentoxides, stir and are passed through nitrogen, add 2.5g azodiisobutyronitriles, stir to obtain reactant liquor；And temperature is risen to into 70
DEG C, the response time is 4h, and reaction terminating obtains the mixture of alkyl phosphate and the polymer with phosphate ester structure；
The mass concentration of N hydroxymethyl acrylamide is 43g/L in the reactant liquor, and the mass concentration of hexadecanol is 728g/
L, the mass concentration of dodecylacrylate is 173g/L, and the mass concentration of phosphorus pentoxide is 121g/L, the isobutyl of azo two
The mass concentration of nitrile is 4.3g/L.
(2) preparation of extracting and cutting agent
Take mixture 300g in step (1) in beaker, to be placed in 50 DEG C of waters bath with thermostatic control and stir to melting, stirring condition
Under, 35g aluminum chloride is slowly added to, obtain mixed liquor；The mass concentration of aluminum nitrate is 112g/L in the mixed liquor；Adjusted with ammonia again
Section system pH is 8, and system temperature risen to into 65 DEG C, and the response time is 3h, reaction terminating, product drying, is crushed, and obtains oil base
Drilling fluid extracting and cutting agent.
Embodiment 9
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
2.9 ten thousand.
Preparation process is as follows：
(1) synthesis of polymer
Successively by 10g hydroxyethyl methylacrylates, 200g hexanols, 50g caprolactams be added to equipped with agitator,
In the wolf bottle of logical nitrogen pipe and thermometer, it is placed in 30 DEG C of waters bath with thermostatic control and stirs to melting, is slow added into the oxidations of 25g five
Two phosphorus, stir and are passed through nitrogen, add 0.5g 2,2'-Azobis(2,4-dimethylvaleronitrile), stir to obtain reactant liquor；And temperature is risen to into 100 DEG C, reaction
Time is 2h, and reaction terminating obtains the mixture of alkyl phosphate and the polymer with phosphate ester structure；
The mass concentration of hydroxyethyl methylacrylate is 37g/L in the reactant liquor, and the mass concentration of hexanol is 744g/L,
The mass concentration of caprolactam is 186g/L, and the mass concentration of phosphorus pentoxide is 93g/L, the matter of 2,2'-Azobis(2,4-dimethylvaleronitrile)
Amount concentration is 1.9g/L.
(2) preparation of extracting and cutting agent
Take mixture 300g in step (1) in beaker, to be placed in 55 DEG C of waters bath with thermostatic control and stir to melting, stirring condition
Under, 20g aluminum chloride is slowly added to, obtain mixed liquor；The mass concentration of aluminum nitrate is 66g/L in the mixed liquor；Adjusted with ammonia again
Section system pH is 9, and system temperature risen to into 65 DEG C, and the response time is 1h, reaction terminating, product drying, is crushed, and obtains oil base
Drilling fluid extracting and cutting agent.
Embodiment 10
A kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, the extracting and cutting agent has aluminium phosphate structure,
The intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；The molecular weight of polymers compositionss is in the extracting and cutting agent
2.9 ten thousand.
Preparation process is as follows：
(1) synthesis of polymer
Successively by 20g hydroxyethyl methylacrylates, 300g capryl alcohol, 80g decyl acrylates are added to equipped with agitator, lead to
In the wolf bottle of nitrogen pipe and thermometer, it is placed in 40 DEG C of waters bath with thermostatic control and stirs to melting, is slow added into the oxidations of 60g five two
Phosphorus, stirs and is passed through nitrogen, adds 2g dibenzoyl peroxides, stirs to obtain reactant liquor；And temperature is risen to into 90 DEG C, the response time
For 10h, reaction terminating, the mixture of alkyl phosphate and the polymer with phosphate ester structure is obtained；
The mass concentration of hydroxyethyl methylacrylate is 46g/L in the reactant liquor, and the mass concentration of capryl alcohol is 695g/L,
The mass concentration of decyl acrylate is 185g/L, and the mass concentration of phosphorus pentoxide is 139g/L, dibenzoyl peroxide
Mass concentration is 4.6g/L.
(2) preparation of extracting and cutting agent
Take mixture 300g in step (1) in beaker, to be placed in 50 DEG C of waters bath with thermostatic control and stir to melting, stirring condition
Under, 30g aluminum chloride is slowly added to, obtain mixed liquor；The mass concentration of aluminum nitrate is 97g/L in the mixed liquor；Adjusted with ammonia again
Section system pH is 9, and system temperature risen to into 65 DEG C, and the response time is 5h, reaction terminating, product drying, is crushed, and obtains oil base
Drilling fluid extracting and cutting agent.
Test example 1
Implement properties of product evaluation：
As follows performance test is carried out with extracting and cutting agent to oil base drilling fluid prepared by the embodiment of the present invention 1～10：
1st, test object：
Blank sample：The basic recipe of oil base drilling fluid is as follows：400mL 5# white oil+4g emulsifying agent+6gNa2CO3+ 8g moistenings
Agent+8g organoclay+125g barite+8g fluid loss additives.
Test specimens 1～10 are respectively in above-mentioned oil base drilling fluid adds respectively the oil prepared by the embodiment of the present invention 1～10
Base drilling fluid extracting and cutting agent, the addition quality of the extracting and cutting agent is 4g.
Comparative sample, comes from domestic additive for drilling fluid manufacturer, and the trade mark is FB-MOD.
2nd, method of testing：
Rheological property is determined：
After test object high-speed stirred 20min, sealing 24h is conserved, and high-speed stirred 10min again after maintenance surveys it
Rheological property.Then test object is fitted into in ageing can the heat rolling 16h at 150 DEG C, 180 DEG C respectively, is cooled to room temperature, moved into
Agitator tank high speed stirs 5min, surveys its rheological property, and method is determined according to specified in GB GB/T16783.1-2006, and
Contrast with comparative sample, determination data is referring to table 1.
The extracting and cutting agent Evaluation results of table 1
Comprehensive analysis, from data above, the oil base drilling fluid extracting and cutting agent that the present invention is prepared is relative to contrast
Sample plastic viscosity is little, yield value is big.Because without multinuclear aluminum ol bridge structure and stronger intermolecular net knot in comparative sample
Structure, and the extracting and cutting agent that the present invention is prepared has the structure of multinuclear aluminum ol bridge, the structure can be formed with multiple phosphate esters matches somebody with somebody
Position key such that it is able to play a part of crosslink polymer molecules, form intermolecular net structure, therefore the extracting and cutting agent is moulded to system
Property viscosity impact it is little, yield value is big, carries and cuts that effect is good, and heat-resisting property is excellent.
Claims (10)
1. a kind of oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, it is characterised in that the extracting and cutting agent has phosphoric acid
Ester constructed of aluminium, the intermolecular effect by multinuclear ol bridge aluminum complex ion forms network structure；Polymers compositionss in the extracting and cutting agent
Molecular weight be 1～100,000；Phosphate compound and aluminium salt are reacted 1～5h and are obtained by the extracting and cutting agent at 50～80 DEG C
Product.
2. a kind of preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure, including step is as follows：
(1) synthesis of phosphate compound
By the unsaturated monomer of hydroxyl, alkylol, the mixing of oil-soluble unsaturated monomer, stir to melting at 30～50 DEG C；It is lazy
Property atmosphere, under stirring condition, add phosphorus pentoxide and initiator, obtain reactant liquor；2～10h is reacted at 50～100 DEG C, is obtained
The mixture of alkyl phosphate and the polymer with phosphate ester structure；
The unsaturated monomer of the hydroxyl be N hydroxymethyl acrylamide, N- hydroxyethyl acrylamides, 2-(Acryloyloxy)ethanol or
One or more kinds of mixture in hydroxyethyl methylacrylate；The oil-soluble unsaturated monomer is styrene, second
Thiazolinyl caprolactam, acrylic acid hexyl ester, acrylic acid octyl group ester, decyl acrylate, dodecylacrylate, acrylic acid ten
One or more kinds of mixture in six Arrcostabs or octadecyl acrylate；
(2) preparation of oil base drilling fluid extracting and cutting agent
The mixture that step (1) is obtained is taken, is stirred to melting at 50～60 DEG C；Under stirring condition, aluminium salt is added, obtain mixed liquor；
The pH value for adjusting mixed liquor is 7～10, and 1～5h is reacted at 50～80 DEG C；Drying, crushing, obtain oil base drilling fluid and are cut with carrying
Agent.
3. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, in step (1) reactant liquor mass concentration of the unsaturated monomer of hydroxyl be 20～50g/L, the matter of alkylol
Amount concentration is 500～800g/L, and the mass concentration of oil-soluble unsaturated monomer is 150～300g/L, the quality of phosphorus pentoxide
Concentration is 50～160g/L, and the mass concentration of initiator is 0.1～5g/L.
4. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, alkylol is one or more in hexanol, capryl alcohol, lauryl alcohol, hexadecanol or octadecanol in the step (1)
Mixture.
5. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, initiator is azodiisobutyronitrile, 2,2'-Azobis(2,4-dimethylvaleronitrile), azo diisopropyl imidazoline hydrochloride, peroxidating in the step (1)
Dibenzoyl, the peroxidating trimethylacetic acid tert-butyl ester or di-cyclohexylperoxy di-carbonate.
6. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, reaction temperature is 50～80 DEG C in the step (1), the response time is 3～6h.
7. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, inert atmosphere is nitrogen, argon or helium atmosphere in the step (1).
8. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, the mass concentration of aluminium salt is 40～120g/L in step (2) mixed liquor.
9. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, aluminium salt is aluminum chloride, aluminum nitrate or aluminum sulfate in the step (2).
10. the preparation method of the oil base drilling fluid extracting and cutting agent with aluminium phosphate structure according to claim 2, it is special
Levy and be, adjust the pH value of mixed solution in the step (2) with ammonia；
Preferably, the pH value that mixed solution is adjusted in the step (2) is 7.5～9.
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| CN113429525A (en) * | 2021-06-29 | 2021-09-24 | 中国石油大学(华东) | High-temperature-resistant oil-based drilling fluid shear strength improving agent and preparation method and application thereof |
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