CN105255458B - A kind of preparation method of high-efficient drilling fluid heat and salinity tolerance fluid loss additive - Google Patents
A kind of preparation method of high-efficient drilling fluid heat and salinity tolerance fluid loss additive Download PDFInfo
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- CN105255458B CN105255458B CN201510856314.6A CN201510856314A CN105255458B CN 105255458 B CN105255458 B CN 105255458B CN 201510856314 A CN201510856314 A CN 201510856314A CN 105255458 B CN105255458 B CN 105255458B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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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
- C09K8/50—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
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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Abstract
The present invention relates to a kind of high-efficient drilling fluid preparation method of heat and salinity tolerance fluid loss additive, after comprising the following steps that useless acrylic fibres are cleaned, dried by (1), it is dissolved into sodium thiocyanate water solution；(2) complete useless acrylic fibres material will be dissolved to be poured into water, be separated by solid-liquid separation, solid dry, pulverize, and obtain polyacrylonitrile powder；(3) under stirring condition, polyacrylonitrile powder is added in sodium hydroxide solution, partial hydrolysis is carried out to polyacrylonitrile；(4) be spray-dried to get.Fluid loss additive made from the method for the present invention overcomes the disadvantage of traditional processing technology product high-temperature resistance difference, by changing product structure form and hydrolysis degree, reach effect resistant to high temperatures, product can also cooperate other fluid loss additive class products such as lignite class, starch etc. to be used in compounding simultaneously, improve product temperature resistance effect.
Description
Technical field
The present invention relates to a kind of preparation methods of fluid loss additive for boring fluid, especially a kind of to have high-temperature stability and height
The filtrate reducer for drilling fluid of filtrate reducing effect is imitated, which is prepared by partial hydrolysis PP GRANULES, belongs to petroleum
Field of engineering technology.
Background technique
Fluid loss additive is a kind of additive the most commonly used in petroleum drilling fluid, it can reduce the moisture in drilling fluid to
It is permeated in stratum, so that stabilizing borehole, protects stratum.Fluid loss additive it is many kinds of, mainly have carboxymethyl cellulose, modified form sediment
Powder, phenolic resin class, lignite class, hydrolyzed polyacrylonitrile class and chemically synthesized multi-component copolymer product.Wherein hydrolyze polypropylene
Nitrile can be formed by waste acrylic for Raw material processing, and at low cost, the processing is simple, and heat and salinity tolerance effect is good and by the favor of user.
However, its temperature resistance ability is no more than 150 DEG C, the development with oil drilling to deep-well, ultradeep well and extended reach well direction is such
Polymer cannot be met the requirements.
In order to seek the higher new product of temperature resistance ability, in recent years, people are dedicated to developing new polymers, this Type of Collective
Object is generally based on 2- acrylamide-2-methyl propane sulfonic, acrylamide, N- vinyl acetamide and N, N- dimethyl allene acyl
The copolymer of one or more of monomers in amine.Although this quasi polymer has ability resistant to high temperatures, but have the shortcomings that viscosity is high, together
When production cost greatly improve.In order to reach resistant to high temperatures and reduce the target of cost, hydrolyzed polyacrylonitrile class improved method is main
Have and 1) compounded by the product with other classes, to improve its performance；2) using polyacrylamide as modifier, with acrylic fibers waste material
Cohydrolysis, which is made, improves product；3) graft copolymerization is carried out with lignite class or silicon fluoride compound, to improve its performance；4) with formaldehyde
It is improved for crosslinking agent.The above method is different degrees of to make moderate progress to acrylic fibers waste material hydrolysate filtrate loss controllability, but total
Body temperature resistance ability is no more than 180 DEG C.The hydrolysis of acrylic fibers waste material is close completely in previous improved method, the linear chain in mud system
Shape is easy degradation and is desorbed from clay particle, at high temperature so that effect resistant to high temperatures be not achieved.
Chinese patent document CN102994055A (application number: 201210576906.9) discloses a kind of drilling fluid drop filter
The preparation method of agent hydrolyzed polyacrylonitrile ammonium salt is lost, each material is calculated by weight as: 400~500 parts of purified cotton, caustic soda 90
~110 parts, 15~25 parts of monoxone, 400~500 parts of acrylic fibers；Drilling fluid filtrate reducing is obtained through alkalization, etherificate, hydrolysis
Agent hydrolyzed polyacrylonitrile ammonium salt inorganic agent.Fluid loss additive for boring fluid hydrolyzed polyacrylonitrile ammonium salt is prepared using the present invention, is made
Standby simple process, the reaction time is short, produces less energy-consuming, is conducive to industrialized production.It is used in drilling fluid, additional amount is small, resists
Salt, high temperature resistant property and filtrate reducing effect are good.It being used in marine drilling and saturated brine, performance is stablized when drillng operation,
The viscosity of drilling fluid is not increased.But the preparation process hydrolysis temperature of the fluid loss additive is high, energy consumption is high, uses purified cotton and nitrile
Synthetic fibre is raw material, at high cost；And fluid loss additive high temperature resistance obtained is bad.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of preparation side of high-efficient drilling fluid heat and salinity tolerance fluid loss additive
Method.
Technical scheme is as follows:
A kind of high-efficient drilling fluid preparation method of heat and salinity tolerance fluid loss additive, comprises the following steps that
(1) it after cleaning, drying by useless acrylic fibres, is dissolved into sodium thiocyanate water solution in 60-80 DEG C, until having dissolved
Entirely；
(2) complete useless acrylic fibres material will be dissolved to be poured into water, be separated by solid-liquid separation, solid dry, pulverize, and obtain polypropylene
Nitrile powder；
(3) under stirring condition, polyacrylonitrile powder is added in sodium hydroxide solution, in 60-85 DEG C to polyacrylonitrile
Partial hydrolysis is carried out, suspension is obtained；
(4) by spray dried to get high-efficient drilling fluid heat and salinity tolerance fluid loss additive.
, according to the invention it is preferred to, polyacrylonitrile mass content >=80% in useless acrylic fibres described in step (1)；
Preferably, the mass concentration of sodium thiocyanate water solution is 40-50%；
Preferably, solution temperature is 70 DEG C.
, according to the invention it is preferred to, drying temperature is 80-100 DEG C in step (2), drying time 6-10h；
Preferably, partial size≤150 μm of polyacrylonitrile powder.
, according to the invention it is preferred to, the mass concentration of sodium hydroxide solution is 20-40%, polyacrylonitrile powder in step (3)
The mass ratio of end and sodium hydroxide solution is 2:(2-3)；
Preferably, hydrolysis temperature is 70-80 DEG C, and hydrolysis time is 10min -1.5h.
, according to the invention it is preferred to, the degree that polyacrylonitrile moiety hydrolyzes in step (3) is 40-70%.
The principle of the present invention:
The polyacrylonitrile powder of certain granules degree gradation is prepared using useless acrylic fibres as raw material by the present invention, then by poly-
The partial hydrolysis of acrylonitrile changes polyacrylonitrile hydrolyzed product structure form.Since polyacrylonitrile moiety hydrolyzes, in polyacrylonitrile
Particle surface is hydrolyzed into hydrophilic-structure, and particle kernel is still polyacrylonitrile.Resulting product has certain particle size gradation, energy
Enough hydration swellings are simultaneously adsorbed on clay particle surface；In drilling fluid mud system, which can effectively block various sizes
Gap, surface of clay can be adsorbed in by force, can control clay particle size, simultaneously because product kernel is anti-for non-hydrophilic
The polyacrylonitrile of high temperature, (being greater than 200 DEG C) under the high temperature conditions, efficient plugging action still has, or even in its fusing point (317
DEG C) can work below, at 260-290 DEG C due to the plasticizing of polypropylene kernel, plugging effect is more preferably.
Fluid loss additive produced by the present invention is solid flowability powder, Applicable temperature generally room temperature to 290 DEG C, can be
It is used in fresh water mud and saturated salt-water mud.
Beneficial effects of the present invention:
1, fluid loss additive made from the method for the present invention overcomes the disadvantage of traditional processing technology product high-temperature resistance difference, leads to
Change product structure form and hydrolysis degree are crossed, reaches effect resistant to high temperatures, while product can also cooperate other fluid loss additive classes to produce
Product such as lignite class, starch etc. are used in compounding, and improve product temperature resistance effect.
2, processing technology of the present invention is simple, the sulphur nitrile acid waste liquor of sodium of generation by evaporation recoverable, generation it is a small amount of
Ammonia exhaust gas recycles after can be absorbed, is easily formed industrial-scale production.
3, the present invention realizes the cyclic utilization of waste using useless acrylic fibres as raw material.
Specific embodiment
Below by specific embodiment, the invention will be further described, but not limited to this.
Useless acrylic fibres described in embodiment are the waste acrylic fiber that (polyacrylonitrile mass content >=80%) is textile mills, city
It buys.
It is in experimental example 1-2 evaluation method is as follows:
Fresh water evaluation method: soil, water, NaHCO will be evaluated3In (10000 revs/min) mixing of ratio high speed of 35:350:1
Gained mud is placed in maintenance bottle and conserved 16 hours, fluid loss additive and high speed then is added by the 1.5% of base slurry quality by 20min
(10000 revs/min) stirring 20min.It surveys and presses API filtration and high temperature and high pressure filter loss HTHP in its fresh water.
Saturated brine (NaCl) evaluation method: soil, saturated brine, NaHCO will be evaluated3In the ratio high speed of 35:350:1
Gained mud merging maintenance bottle is conserved 16 hours, is then added by the 1.5% of base slurry quality by (10000 revs/min) mixing 20min
Enter prepared (10000 revs/min) stirring 20min of fluid loss additive high speed.It surveys in its saturated brine and presses API filtration and high temperature high
Filter pressing loss HTHP.
Embodiment 1:
80g useless acrylic fibres are cleaned, after drying, are added in 3 liters of reaction flasks.80g sodium sulfocyanate and 100g water are added again
Enter reaction flask, be warming up to 70 DEG C under stiring, until useless acrylic fibres all dissolve, dissolved acrylic fibers material is poured into sink
In, it is cured as sheet-like polypropylene nitrile, 90 DEG C dry 8 hours.Gained polyacrylonitrile is crushed in pulverizer, passes through 200 meshes
Net is screened, and the raw material that polyacrylonitrile granularity is narrower than 200 mesh is obtained.This raw material 40g is taken to be added under vigorous stirring
In 50g20wt%NaOH aqueous solution, 80 DEG C are warming up to, reacts 10min, partial hydrolysis is carried out to polyacrylonitrile, hydrolysis degree is
40%, send small spraying drying tower dry to get product A.
Embodiment 2:
80g useless acrylic fibres are cleaned, after drying, are added in 3 liters of reaction flasks.80g sodium sulfocyanate and 100g water are added again
Enter reaction flask, be warming up to 70 DEG C under stiring, until useless acrylic fibres all dissolve, then dissolved acrylic fibers material is poured into sink
In, it is cured as sheet-like polypropylene nitrile, 90 DEG C dry 8 hours.Gained polyacrylonitrile is crushed in pulverizer, it is logical to sieve with 100 mesh sieve
Net is screened, and the raw material that polyacrylonitrile granularity is narrower than 100 mesh is obtained.This raw material 40g is taken to be added to 50g under vigorous stirring
In 20wt%NaOH aqueous solution, 80 DEG C are warming up to, reacts 15min, partial hydrolysis is carried out to polyacrylonitrile, hydrolysis degree is
42%, send small spraying drying tower dry to get product B.
Embodiment 3:
80g useless acrylic fibres are cleaned, after drying, are added in 3 liters of reaction flasks.80g sodium sulfocyanate and 100g water are added again
Enter reaction flask, be warming up to 70 DEG C under stiring, until useless acrylic fibres all dissolve, then dissolved acrylic fibers material is poured into sink
In, it is cured as sheet-like polypropylene nitrile, 90 DEG C dry 8 hours.Gained polyacrylonitrile is crushed in pulverizer, passes through 100-150
Mesh screen is screened, and obtains polyacrylonitrile granularity between the raw material of 100-150 mesh.Take this raw material 40g under vigorous stirring
It is added in 50g 20wt%NaOH aqueous solution, is warming up to 80 DEG C, react 20min, partial hydrolysis, hydrolysis are carried out to polyacrylonitrile
Degree is 45%, send small spraying drying tower dry to get products C.
Embodiment 4:
80g useless acrylic fibres are cleaned, after drying, are added in 3 liters of reaction flasks.80g sodium sulfocyanate and 100g water are added again
Enter reaction flask, be warming up to 70 DEG C under stiring, until useless acrylic fibres all dissolve, then dissolved acrylic fibers material is poured into sink
In, it is cured as sheet-like polypropylene nitrile, 90 DEG C dry 8 hours.Gained polyacrylonitrile is crushed in pulverizer, passes through 200 meshes
Net is screened, and the raw material that polyacrylonitrile granularity is narrower than 200 mesh is obtained.This raw material 40g is taken to be added to 50g under vigorous stirring
In 40wt%NaOH aqueous solution, after being warming up to 80 DEG C, reaction 1.5 hours, partial hydrolysis is carried out to polyacrylonitrile, hydrolysis degree is
70%, send small spraying drying tower dry to get product D.
Embodiment 5:
80g useless acrylic fibres are cleaned, after drying, are added in 3 liters of reaction flasks.80g sodium sulfocyanate and 100g water are added again
Enter reaction flask, be warming up to 70 DEG C under stiring, until useless acrylic fibres all dissolve, then dissolved acrylic fibers material is poured into sink
In, it is cured as sheet-like polypropylene nitrile, 90 DEG C dry 8 hours.Gained polyacrylonitrile is crushed in pulverizer, passes through 200 meshes
Net is screened, and the raw material that polyacrylonitrile granularity is narrower than 200 mesh is obtained.This raw material 40g is taken to be added to 50g under vigorous stirring
In 40wt%NaOH aqueous solution, after being warming up to 80 DEG C, reaction 1 hour, partial hydrolysis is carried out to polyacrylonitrile, hydrolysis degree is
60%, send small spraying drying tower dry to get product E.
Embodiment 6:
80g useless acrylic fibres are cleaned, after drying, are added in 3 liters of reaction flasks.80g sodium sulfocyanate and 100g water are added again
Enter reaction flask, be warming up to 70 DEG C under stiring, until useless acrylic fibres all dissolve, then dissolved acrylic fibers material is poured into sink
In, it is cured as sheet-like polypropylene nitrile, 90 DEG C dry 8 hours.Gained polyacrylonitrile is crushed in pulverizer, passes through 200 meshes
Net is screened, and the raw material that polyacrylonitrile granularity is narrower than 200 mesh is obtained.This raw material 40g is taken to be added to 50g under vigorous stirring
In 40wt%NaOH aqueous solution, after being warming up to 80 DEG C, reaction 0.5 hour, partial hydrolysis is carried out to polyacrylonitrile, hydrolysis degree is
50%, send small spraying drying tower dry to get product F.
Embodiment 7:
6 gained 3g sample of embodiment is uniformly mixed with the anti-collapse viscosity reduction fluid loss additive 17g of lignite class, obtains product G.
Embodiment 8:
6 gained 3g sample of embodiment is uniformly mixed with lignite class racemosus phenolic resin fluid loss additive 17g, obtains product
H。
Embodiment 9:
6 gained 3g sample of embodiment is uniformly mixed with hydroxyethyl starch fluid loss additive 17g, obtains product I.
Comparative example
As described in Example 1, polyacrylonitrile is hydrolyzed completely unlike, hydrolysis degree 100%.
Experimental example 1
By the fresh water filter loss of above-mentioned sample A-I evaluation result is shown in table 1.
The different sample fresh water mud filter loss comparisons of table 1.
* comparative sample J is that a kind of polyacrylonitrile hydrolyzed product type fluid loss additive, the comparative sample K, L industrially generally used is
The lignite class fluid loss additive industrially generally used；Comparative sample M is hydroxyethyl starch fluid loss additive, similarly hereinafter.
Experimental example 2
The saturated brine filter loss of above-mentioned sample A-I is evaluation result is shown in table 2.
The different sample saturated brine filter loss comparisons of table 2.
Middle pressure API filtration and plain polypropylene nitrile water after fresh water room temperature maintenance it can be seen from Tables 1 and 2 result
Solve product type fluid loss additive and lignite class, starch it is suitable, and fresh water and saturated brine high temperature and pressure result are than commonly poly- third
Alkene nitrile hydrolysate class fluid loss additive and lignite class, starch are significantly increased.
Claims (8)
1. a kind of high-efficient drilling fluid preparation method of heat and salinity tolerance fluid loss additive, comprises the following steps that
(1) it after cleaning, drying by useless acrylic fibres, is dissolved into sodium thiocyanate water solution in 60-80 DEG C, until dissolution is complete；
(2) complete useless acrylic fibres material will be dissolved to be poured into water, be separated by solid-liquid separation, solid dry, pulverize, and obtain polyacrylonitrile powder
End；
(3) under stirring condition, polyacrylonitrile powder is added in sodium hydroxide solution, polyacrylonitrile is carried out in 60-85 DEG C
Partial hydrolysis obtains suspension；
Hydrolysis temperature is 70-80 DEG C, and hydrolysis time is 10 min -0.5 h；The degree of polyacrylonitrile moiety hydrolysis is 40-
50%；
(4) by spray dried to get high-efficient drilling fluid heat and salinity tolerance fluid loss additive.
2. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that step
Suddenly polyacrylonitrile mass content >=80% in useless acrylic fibres described in (1).
3. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that step
Suddenly the mass concentration of sodium thiocyanate water solution is 40-50% in (1).
4. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that step
Suddenly solution temperature is 70 DEG C in (1).
5. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that
Drying temperature is 80-100 DEG C in step (2), and drying time is 6-10 h.
6. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that step
Suddenly in (2) polyacrylonitrile powder partial size≤150 μm.
7. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that step
Suddenly the mass concentration of sodium hydroxide solution is 20-40% in (3).
8. the high-efficient drilling fluid according to claim 1 preparation method of heat and salinity tolerance fluid loss additive, which is characterized in that step
Suddenly the mass ratio of polyacrylonitrile powder and sodium hydroxide solution is 2:(2-3 in (3)).
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| CN105860582A (en) * | 2016-04-18 | 2016-08-17 | 河南工程学院 | Waste-acrylic-fiber method for dye decoloring and recycling |
| CN108102015A (en) * | 2017-12-16 | 2018-06-01 | 保定市三拓化工产品有限公司 | A kind of drilling fluid anti-calcium and anti-salt fluid loss additive quaternary ammonium polymer and preparation method thereof |
| CN110483686B (en) * | 2019-07-30 | 2021-08-31 | 石家庄华信泥浆助剂有限公司 | Environment-friendly cationic fluid loss reducing composition and fluid loss reducing agent |
| CN114958317A (en) * | 2022-04-21 | 2022-08-30 | 深圳越海工程技术有限公司 | Solid phase material selection and formula of underground leaking stoppage system |
| CN115725278A (en) * | 2022-11-03 | 2023-03-03 | 克拉玛依友联实业有限责任公司 | Environment-friendly temperature-resistant and salt-resistant amino filtrate reducer for drilling fluid and preparation method thereof |
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