CN100445229C - Bilogical-degradable oil-well cement dispersant and preparing method therefor - Google Patents

Bilogical-degradable oil-well cement dispersant and preparing method therefor Download PDF

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CN100445229C
CN100445229C CNB2007100138134A CN200710013813A CN100445229C CN 100445229 C CN100445229 C CN 100445229C CN B2007100138134 A CNB2007100138134 A CN B2007100138134A CN 200710013813 A CN200710013813 A CN 200710013813A CN 100445229 C CN100445229 C CN 100445229C
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formaldehyde
well cement
animal gelatin
bilogical
reaction solution
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CN101070233A (en
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王成文
王瑞和
步玉环
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China University of Petroleum East China
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/30—Condensation polymers of aldehydes or ketones
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/14—Peptides; Proteins; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
    • 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
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • C04B2103/0059—Graft (co-)polymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0072—Biodegradable materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0074—Anti-static agents
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/408—Dispersants
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack

Abstract

This invention relates to a biodegradable oil well cement dispersant and preparation method. The dispersant is sulfonate modified offspring of animal gelatin and formaldehyde, acetone and sodium metabisulfite, relative molecular weight is 8000 to 45000. The preparation method: mixture of distilled water, formaldehyde, sodium metabisulfite and animal gelatin under low temperature, basicity condition take sulfonating polycondensation reaction with acetone, generate sulfonating aldehyde ketone polycondensate, then under subacidity condition, formaldehyde and animal gelatin take Mannich reaction with sulfonating aldehyde ketone polycondensate, finally decompression and fractionation to remove methanol and other impurity, gain crimson offspring. This dispersant has outstanding dispersibility to oil well cement, possess strong salt tolerance and without side effect of slow hardening. service temperature scope is 10 to 80 deg; adding amount in the cement slurry is 0.5 to 1.0% of cement. This invention in particular lends oneself to marine oil region as well as deep water sea area low temperature well cementation region that has rigid environmental requirements.

Description

A kind of Bilogical-degradable oil-well cement dispersant and preparation method thereof
Technical field
The present invention relates to a kind of Bilogical-degradable oil-well cement dispersant and preparation method thereof, belong to oilfield chemistry and use agent and oil gas well cementing operation field.This dispersion agent can be used for reducing in oil, the Sweet natural gas well cementation process resistance to flow of grout, is specially adapted to the marine oil well cementation field of environmental requirement strictness and the low temperature well cementing aspect of deep water sea area.
Background technology
In the well cementation process of well-completion practice, oil well cement paste is pumped in the annular space between sleeve pipe and the pit shaft, this requires grout that good rheological is arranged.The oil well cement dispersion agent generally is an aniorfic surfactant, make cement particle surface band same sex electric charge on the positively charged position of cement particle surface by being adsorbed on, destroy the flucculation structure and the aggregate of grout, discharge more freedom water, effectively reduce the viscosity of grout, improve the pumpability of grout, reduce the pump pressure under the certain flow rate, can realize the turbulent flow cementing under the low pumping rate, help removing the drilling fluid of oil gas wellbore surface, improve the replacement effect of drilling fluid, this is the important measures that improve cementing quality.In addition, dispersion agent can reduce the normal water requirement of preparation grout, and the minimizing of the water yield can promote the intensity of cement stone in the grout.
At present, the dispersion agent of existing many types is used for oil gas well cementing operation cementing job and remedial cementing operation.As citric acid, sulfonated lignin, poly naphthalene sulfonate etc. all is the oil well cement good dispersant, but this class material has stronger slow setting side effect to oil well cement, particularly under cold condition; Melamine sulfonate, poly styrene sulfonate, sulfonation aldehyde ketone polycondensate have good dispersion agent, also less to the slow setting side effect of oil well cement to oil well cement, but this class material is very stable in environment, are difficult to biological degradation.As sulfonation aldehyde ketone polycondensate, its trade name is CFR-3, SXY etc., it is by the condensation addition and obtaining under alkaline condition of low-molecular-weight aldehyde, ketone and vitriol, has good dispersive ability, and the Applicable temperature scope is wider, is extensively a kind of oil well cement dispersion agent of present field use.But the carbon-carbon skeletal chain of sulfonation aldehyde ketone polycondensate is more stable in environment, it can and can be present in for a long time in the environment and be difficult to biological degradation in the migration of various surrounding medium middle and long distances, in environment through environment accumulate, the mode damage to the environment and the ecosystems such as biological accumulation, bio-transformation or chemical reaction.Along with petroleum industry develops to the marine oil direction, these oil well cement dispersion agents that are difficult for degraded will bring murder by poisoning to the aquatic animals and plants in the ocean or other life, be a kind of to the disagreeableness material of environment, can't satisfy the environmental requirement of offshore oil exploration and exploitation, also can't satisfy the environmental requirement of some country increasingly stringent.
The readily biodegradable material refers to this material under the laboratory simulation condition, and the amount of its 28 days internal consumption dissolved oxygens surpasses 60% of the needed theoretical oxygen demand of its permineralization.Between organic biodegradability size and its structure close ties are arranged, had some data to judge the biodegradable difficulty or ease of organic compound at present, and found some structures-biological degradation trend.At first, contain hydrolysable group, as carboxylicesters [C (O) OR], aminocompound [C (O) NR 2], the compound of acid anhydride class or phosphoric acid ester all is degraded easily; Secondly, contain hydroxyl (OH), aldehyde radical (CHO), carboxyl (COOH) compound of group also be easy to biodegradable; In addition, the organism of oxy radical also be easy to biodegradable.According to these structures-biological degradation related law, can utilize them to improve the organic compound design, compound can be finished be they designed tasks, and after compound uses, can the environment of periphery not worked the mischief.At present, the domestic Bilogical-degradable oil-well cement dispersant that does not also have to be used for oil gas well cementing operation.External aspect the research of Bilogical-degradable oil-well cement dispersant, some reports have appearred in recent years, mainly be by some are contained hydroxyl, the natural macromolecular material of groups such as carboxyl carries out modification to prepare biodegradable oil well cement dispersion agent, as Europe Patent 1625278 (2004,11,25), it is with casein food grade, natural high molecular substance such as soybean protein or poly aspartic acid is a raw material, by with aldehyde material (as formaldehyde, oxalic dialdehyde etc.), acetone, vitriol is (as sulphite, hydrosulphite etc.) carry out polycondensation under certain condition and prepare biodegradable oil well cement dispersion agent, but the oil well cement dispersion agent that this method synthesized has certain slow setting side effect, well cementation is unfavorable down to cold condition, particularly can not finely satisfy the desired shorter curing time of low temperature well cementing of deep water surface string; This method tool this when synthetic the bad control of temperature of reaction and be prone to the crosslinked reaction solution that makes and be the frozen glue shape, the products obtained therefrom sulphidity is less, dispersion effect is relatively poor.
Summary of the invention
The purpose of this invention is to provide a kind of biodegradable oil well cement dispersion agent and preparation method thereof.This dispersion agent all has good dispersing property in fresh water or finite concentration salt solution, at low temperatures oil well cement there is not the slow setting side effect, and the solids content of this kind product can reach more than 40%, need not heating and concentrates and can directly use, and can reduce production energy consumption significantly.
The object of the present invention is achieved like this, and the Bilogical-degradable oil-well cement dispersant that is proposed is an a-amino acid grafting sulfonation aldehyde ketone polycondensate, and relative molecular mass is 8000～45000, and general structure is:
Wherein, n is a mean polymerisation degree, and A is the macro-radical in the animal gelatin molecule.
The preparation method of Bilogical-degradable oil-well cement dispersant of the present invention mainly comprises following three steps:
I, the reflux cooling device is being housed, agitator, thermometer, add distilled water in the four-hole reaction flask of dropping funnel, formaldehyde, Sodium Pyrosulfite and animal gelatin, distilled water wherein: formaldehyde: Sodium Pyrosulfite: the mol ratio of animal gelatin is 4.5～10: 0.3～0.6: 0.08～0.12: 0.2～0.6, with the sodium hydroxide solution adjust pH is 13～14, reaction solution is heated to 30～45 ℃ then, drip 0.3～0.6 mole of acetone and control rate of addition and make reacting liquid temperature≤45 ℃, being warming up to 55～65 ℃ and constant temperature after adding refluxed 1～3 hour, the reaction solution color is become orange gradually by yellow, become scarlet again, make sulfonation aldehyde ketone polycondensate.The equation of reaction is as follows;
Figure C20071001381300071
II, be 4～7 with the dilute hydrochloric acid solution adjust pH with reaction solution, the Mannich reaction takes place in the animal gelatin, the sulfonation aldehyde ketone polycondensate that continue to drip in 0.3～0.7 moles of formaldehyde and the reaction solution, treat that after formaldehyde adds reaction solution being warming up to 80～90 ℃ and constant temperature refluxed 2～5 hours, reaction solution is the scarlet thick liquid, makes a-amino acid grafting sulfonation aldehyde ketone polycondensate.The equation of reaction is as follows:
Figure C20071001381300072
III, vacuum fractionation are removed methyl alcohol and other impurity in the product, make liquid Bilogical-degradable oil-well cement dispersant product.
Above-mentioned Bilogical-degradable oil-well cement dispersive preparation method, it is characterized in that described animal gelatin physicochemical property with a-amino acid structure is: jelly intensity (12.5% glue, 10 ℃) be 150～250Bloom/g, viscosity Engler (15% glue, 40 ℃) be 3.2～5.4 ° of E, the pH value is 5.7～6.8, and the order number is 8～20.
The present invention has solved the problem that existing oil well cement dispersion agent exists from following four aspects.(1) by to the sulfonation modifying of natural family macromolecule material-animal gelatin, prepare environment amenable oil well cement dispersion agent, and the dispersion agent sample that synthesizes do not have the slow setting side effect at low temperatures, be particularly suitable for the well cementation under the cold condition; (2) make synthetics have good dispersing property by the ratio of optimizing between reactant formaldehyde, Sodium Pyrosulfite, animal gelatin, the acetone, even still have good dispersive ability at high salt concentration content; (3) formaldehyde is divided into before and after two batches of addings, make temperature of reaction controlled and effectively avoid the reactant gel phenomenon, improve the sulfonation degree of product; (4) adopt Sodium Pyrosulfite as sulphonating agent, it is less and be higher than that solubleness after 34.5 ℃ reduces on the contrary and weak point that crystallization is separated out in temperature effectively to avoid adopting sulphite to make the existing solubleness of sulphonating agent, make the solid load height (reaching more than 40%) of synthetic product, need not to concentrate and just can directly use, reduced production cost;
Oil well cement dispersion agent use temperature scope provided by the invention is 10～80 ℃, and the dosage in grout is a cement quality fractional 0.5～1.0%.
Embodiment
Embodiment 1, and the preparation method of Bilogical-degradable oil-well cement dispersant is described
(animal gelatin provides for Sha Men Hua Xuan gelatin company limited to add distilled water 100mL, formaldehyde 29.5mL, Sodium Pyrosulfite 22.8g and animal gelatin 60g in the four-hole reaction flask of reflux cooling device, agitator, thermometer, dropping funnel is housed respectively, jelly intensity is 226Bloom/g, 5.0 ° of E of viscosity Engler, the pH value is 6.3, the order number is 10), be heated to 33 ℃ under stirring, the sodium hydroxide solution adjust pH with 20% is 14; Drip acetone 37.5mL and control rate of addition and make reacting liquid temperature≤45 ℃, be warming up to 60 ℃ and constant temperature after adding and refluxed 1.5 hours, the reaction solution color is become orange gradually by yellow, become scarlet again; Be 6.5 with reaction solution with 10% hydrochloric acid adjust pH then, drip formaldehyde 32.5mL, treat that after formaldehyde adds reaction solution being warming up to 85 ℃ refluxed 3 hours, obtained wine-colored thick liquid; Last vacuum fractionation is removed methyl alcohol and other impurity in the product, and the sodium hydroxide solution with 20% is transferred pH=7, obtains scarlet liquid dispersed agent product, and apparent viscosity (20 ℃) is 52mPas, and solution solid phase percentage composition is 42%, and code name is sample A.
Embodiment 2, the dispersing property evaluation of oil well cement dispersion agent of the present invention
The liquid sample A that in winning Weihe River oil well G class g cement, adds certain mass percentage ratio (is benchmark with the cement quality), it by GB10238-88 standard fabrication water cement ratio 0.44 grout, by the rheological of measuring grout by the oil and gas industry standard SY/T 5480-92 of the People's Republic of China (PRC) " design of cementing rheological ", evaluate the dispersing property of sample A then.For the ease of relatively, all calculate rheological parameter n, the K value of grout by power law method at this.N represents liquidity index, and n value big flood mud flow performance more is good more, and K is a consistency index, and the big more grout that shows of K value is thick more.The well cementation circle it is generally acknowledged that the n value of grout is the bigger the better, the K value is the smaller the better, and grout is rare like this, degree of mobilization is big, is easy to pumping, realizes turbulence replacement.
Evaluate the dispersing property of sample A according to the method described above, the results are shown in Table 1 oil well cement.Experimental result shows, oil well cement dispersion agent of the present invention all has good dispersing property under the temperature (60 ℃) in low temperature (15 ℃) reaches.When sample A mass percent dosage 0.75% the time, grout n value is raised to more than 0,94, the K value drops to below 0.05, the rheological property that improves oil well cement paste is very obvious.
Table 1
Sample A dosage (%) Temperature (℃) Ф 600 Φ 300 Φ 200 Ф 100 Ф 6 Ф 3 n K (Pa·s n)
0 15 114 61 50 38 18 11 0.4300 2.1337
0.5 15 79 40 29 17 7.5 7 0.7774 0.1603
0.75 15 78 34 22 12 1 0.5 0.9462 0.0475
1.0 15 76 31 20 9 0 0 1.1237 0.0143
0 60 140 83 65 54 25 14 0.3905 3.7142
0.5 60 46 22 15 8 0 0 0.9190 0.0365
0.75 60 44 18 11 6 0 0 0.9981 0.0182
1.0 60 41 15 9 4 0 0 1.2009 0.0043
Embodiment 3, the anti-salt property evaluation of oil well cement dispersion agent of the present invention
Press GB10238-88 standard fabrication grout, water cement ratio is 0.44, and sample A makes dispersion agent, and to the dispersing property influence of sample A, it the results are shown in Table 2 to evaluation NaCl when the different mass percentage concentration.Experimental result shows, is 18% and 37% o'clock in the NaCl mass percentage concentration, and grout still has good rheological, and this illustrates that oil well cement dispersion agent saline-alkaline tolerance of the present invention is strong.
Table 2
Sample A dosage (%) Temperature (℃) NaCl (％) Ф 600 Ф 300 Ф 200 Ф 100 Ф 6 Ф 3 n K (Pa·s n)
0 15 18 103 57 42 27 10 9 0.6789 0.4222
1.0 15 18 82 40 26 13 1.0 0.5 1.0211 0.0350
0 15 37 123 67 48 31 11 10 0.7002 0.4346
1.0 15 37 90 43 27 13 0.5 0 1.0874 0.0249
Embodiment 4, and oil well cement dispersion agent of the present invention is estimated the time of coagulation and the ultimate compression strength influence of grout
Press GB10238-88 standard fabrication grout, water cement ratio is 0.44, and sample A makes dispersion agent, and density is 1.92g/cm 3Measure presetting period, final setting time and the ultimate compression strength of grout, evaluation result sees Table 3.Experimental result shows that oil well cement dispersion agent of the present invention does not only have the slow setting side effect to oil well cement when low temperature (15 ℃), but also helpful to the development of cement stone ultimate compression strength, makes cement strength be increased to 6.58MPa from 3.97MPa.
Table 3
Sample A dosage (%) Temperature (℃) Presetting period (h:min) Final setting time (h:min) 24h ultimate compression strength (MPa)
0 15 8:30 10:30 3.97
0.5 15 8:30 10:20 4.13
0.75 15 8:20 10:15 4.85
1.0 15 8:10 9:50 6.58

Claims (3)

1. a Bilogical-degradable oil-well cement dispersant is characterized in that a-amino acid grafting sulfonation aldehyde ketone polycondensate, and relative molecular mass is 8000～45000, and general structure is:
Figure C2007100138130002C1
Wherein, n is a mean polymerisation degree, and A is the macro-radical in the animal gelatin molecule.
2. the preparation method of a Bilogical-degradable oil-well cement dispersant is characterized in that mainly comprising three steps:
I, the reflux cooling device is being housed, agitator, thermometer, add distilled water in the four-hole reaction flask of dropping funnel, formaldehyde, Sodium Pyrosulfite and animal gelatin, distilled water wherein: formaldehyde: Sodium Pyrosulfite: the mol ratio of animal gelatin is 4.5～10: 0.3～0.6: 0.08～0.12: 0.2～0.6, with the sodium hydroxide solution adjust pH is 13～14, reaction solution is heated to 30～45 ℃ then, drip 0.3～0.6 mole of acetone and control rate of addition and make reacting liquid temperature≤45 ℃, being warming up to 55～65 ℃ and constant temperature after adding refluxed 1～3 hour, the reaction solution color is become orange gradually by yellow, become scarlet again, make sulfonation aldehyde ketone polycondensate;
II, be 4～7 with the dilute hydrochloric acid solution adjust pH with reaction solution, the Mannich reaction takes place in the animal gelatin, the sulfonation aldehyde ketone polycondensate that continue to drip in 0.3～0.7 moles of formaldehyde and the reaction solution, treat that after formaldehyde adds reaction solution being warming up to 80～95 ℃ and constant temperature refluxed 2～5 hours, reaction solution is the scarlet thick liquid, makes a-amino acid grafting sulfonation aldehyde ketone polycondensate;
III, vacuum fractionation are removed methyl alcohol and other impurity in the product, transfer pH=7 with sodium hydroxide solution, obtain liquid Bilogical-degradable oil-well cement dispersant product.
3. the preparation method of Bilogical-degradable oil-well cement dispersant according to claim 2, it is characterized in that described animal gelatin physicochemical property with a-amino acid structure is: 10 ℃, the jelly intensity of 12.5% glue are 150～250Bloom/g, 40 ℃, the viscosity Engler of 15% glue are 3.2～5.4 ° of E, the pH value is 5.7～6.8, and the order number is 8～20.
CNB2007100138134A 2007-03-15 2007-03-15 Bilogical-degradable oil-well cement dispersant and preparing method therefor Expired - Fee Related CN100445229C (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6840319B1 (en) * 2004-01-21 2005-01-11 Halliburton Energy Services, Inc. Methods, compositions and biodegradable fluid loss control additives for cementing subterranean zones
US20060074201A1 (en) * 2002-12-11 2006-04-06 Christian Spindler Polyamide-based water-soluble biodegradable copolymers and the use thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060074201A1 (en) * 2002-12-11 2006-04-06 Christian Spindler Polyamide-based water-soluble biodegradable copolymers and the use thereof
US6840319B1 (en) * 2004-01-21 2005-01-11 Halliburton Energy Services, Inc. Methods, compositions and biodegradable fluid loss control additives for cementing subterranean zones

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