CN1257248C - Preparation method of tala well drilling liquid viscosity lowering agent - Google Patents
Preparation method of tala well drilling liquid viscosity lowering agent Download PDFInfo
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- CN1257248C CN1257248C CN 02133632 CN02133632A CN1257248C CN 1257248 C CN1257248 C CN 1257248C CN 02133632 CN02133632 CN 02133632 CN 02133632 A CN02133632 A CN 02133632A CN 1257248 C CN1257248 C CN 1257248C
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- powder
- viscosity lowering
- lowering agent
- extract
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Abstract
The present invention relates to a preparation method for a viscosity lowering agent for tala well drilling liquid. Tala pod powder is used as a raw material, and is extracted with water or alkaline liquid; a polymer containing base groups of sulfonic acid bases, carboxylic acid bases, amido bases, ester bases, etc. is added to the extract of the tala pod powder, and the polymer and the extract are mixed to prepare a viscosity lowering agent. The method is simple, and the raw material is easy to obtain. The viscosity lowering agent for well drilling liquid not only can be prepared into a liquid state product, but also can be prepared into a powdery product. Besides the viscosity lowering agent has a favorable viscosity lowering effect, the viscosity lowering agent also has the characteristics of environmental protection, high temperature resistance, high efficiency, salt resistance and high performance price ratio.
Description
Technical field: the preparation method who the invention belongs to petroleum drilling fluid viscosity-depression agent (thinner).
Background technology: in the process of drilling well, drilling fluid plays important effect, is to realize modern probing irreplaceable drilling well " blood ".It has the bottom-hole cleaning, cutting carring; Lubricated, cooling bit drilling tool; Stabilizing borehole, the protection payzone; Equilibrium strata pressure prevents down-hole accident; Transferring power, effects such as performance waterpower usefulness.Therefore, the quality of drilling fluid directly has influence on the speed of drilling well and the quality of drilling well.Drilling fluid is along with its character such as rising of the creeping into of drill bit, the physicochemical property of selected rock stratum, phreatic composition and subsurface temperature can change, the viscosity of drilling fluid becomes big under normal conditions, shear force raises, the rheological deterioration, thereby influence drilling speed and quality, thereby to dilute drilling fluid with viscosity-depression agent, to reduce its viscosity and shear force, keep good rheological.At present, viscosity-depression agent mainly contains four classes: 1. based on the viscosity-depression agent of natural matters such as xylogen, tannin extract, tannin, and 2. polymer viscosity reducer, 3. inorganic viscosity-depression agent, 4. positive colloid drilling fluid thinner.Wherein xylogen chromium-iron lignosulfonate (FCLS), sulfonation tannin extract (SMT), sulfonation tannin (SMK), Chrome-free thinner (LGV) etc. are comparatively commonly used, but all there is certain problem in these viscosity-depression agents, for example, xylogen chromium-iron lignosulfonate (FCLS) contains the toxic metal ion, sulfonation tannin extract (SMT), sulfonation tannin (SMK) and Chrome-free thinner (LGV) non-refractory, dilution effect is relatively poor.On the method for preparation, great majority are that the purpose that reaches temperature resistance all adopts earlier sulfonation or sulfomethylation based on the viscosity-depression agents of natural matter, again with the approach of heavy metal complexing, therefore, in preparation and the process used, have formaldehyde pollution and heavy metallic poison.
Goal of the invention: the objective of the invention is to seek a kind of method for preparing drilling fluid thinner, overcoming the deficiencies in the prior art, and reach and use preferably and environment protecting.
China has introduced a fine variety from South America since tower draws from the beginning of the nineties, plants experimentally popularization on the Changjiang river middle and upper reaches, river, Yunnan-Guizhou and other places, for positive contribution has been made in the ecological environmental protection of locality.Tower ripe, that output is higher drew beanpod high temperature resistant talas of tannic acid drilling fluid thinner provided abundant raw material for we research and develop one years 2～3.
Technical scheme: at first tower being drawn beanpod powder and water or alkali lye is that 1: 3～10 mixed feeds intake by powder liquid weight ratio, stir temperature rising reflux, temperature range is 20-100 ℃, extraction time is 0.5-8 hour, washing after filtration,, concentrating filter liquor obtains aqueous extract, or again drying, pulverize powdered extract.With said extracted thing and the polymkeric substance that contains groups such as sulfonic group, carboxylic acid group, amide group, the ester group mixed by weight 5～20: 1, make drilling fluid thinner then.
The used alkali of the present invention is generally NaOH or KOH, and its consumption is 5～20% weight percents that tower draws the beanpod powder, and best consumption is 8～15%.It is 1: 5～8 that tower draws the best powder liquid weight ratio of beanpod powder and water or alkali lye, and the most suitable extraction temperature is 50-80 ℃, and the most suitable extraction time is 1-3 hour.The best mixed weight ratio of extract (in solid substance) and polymkeric substance is 8～15: 1, usually polymkeric substance is meant the polymkeric substance of groups such as containing sulfonic group, carboxylic acid group, amide group, ester group, as acrylamide-methacrylic acid potassium multipolymer, acrylamide-copolymer-maleic anhydride, acrylamide-acrylic copolymer, acrylamide-maleic anhydride-methylmethacrylate copolymer, acrylamide-sodium allyl sulfonate multipolymer etc.
Indication extract of the present invention, it mainly is extracted into and is divided into talas of tannic acid.
The invention effect: compared with the prior art the present invention has the following characteristics: the one, and drawing the beanpod powder with tower is raw material, the source is abundant; The 2nd, without process for sulfonation, with the heavy metal complexing, technology is not simple, no matter be in the product manufacturing therefore, still can not cause damage to environment in the use of product; The 3rd, product Applicable temperature scope is wide, can use other tannins viscosity-depression agent non-refractory, SMT etc. for example, low temperature drilling fluid (≤120 ℃) in only being applicable in 20-200 ℃ of drilling fluid; The 4th, efficient, its viscosity break ratio is all more than 90% generally speaking, and other tannins viscosity-depression agent viscosity reducing effect is relatively poor; The 5th, have certain salt resistance, its viscosity reducing effect does not have considerable change in 2% NaCl solution and under the high temperature.The 6th, the cost performance height, because production technique is simple relatively, cost is lower.
Embodiment:
Embodiment 1
The tower that drops into 150kg draws the beanpod powder, adds water 1500kg, refluxes 5 hours at 60 ℃, filters, and filter residue merges filtrate with an amount of water washing 2 times, concentrate liquid extract, or oven dry (≤110 ℃) again is ground into powder, gets brown talas of tannic acid powder.Productive rate is for dropping into the 50-65% of powder.
Embodiment 2
The tower that drops into 150kg draws the beanpod powder, adds water 1500kg, adds NaOH20kg, refluxes 1.5 hours at 60 ℃, filter, filter residue merges filtrate with an amount of water washing 2 times, concentrated liquid extract, or oven dry (≤110 ℃) again, be ground into powder, get brown talas of tannic acid powder.Productive rate is for dropping into the 60-80% of powder.
Embodiment 3
The tower that drops into 150kg draws the beanpod powder, adds water 1200kg, adds NaOH20kg, refluxes 1 hour at 80 ℃, filter, filter residue merges filtrate with an amount of water washing 2 times, concentrated liquid extract, or oven dry (≤110 ℃) again, be ground into powder, get brown talas of tannic acid powder.Productive rate is for dropping into the 60-75% of powder.
Embodiment 4
The tower that drops into 150kg draws the beanpod powder, adds water 800kg, adds KOH18kg, refluxes 1 hour at 100 ℃, filter, filter residue merges filtrate with an amount of water washing 3 times, concentrated liquid extract, or oven dry (≤110 ℃) again, be ground into powder, get brown talas of tannic acid powder.Productive rate is for dropping into the 60-75% of powder.
Embodiment 5
Drop into 500kg talas of tannic acid extracting solution (talas of tannic acid content is 60%) in mixing machine, 50kg acrylamide-methacrylic acid potassium multipolymer mixes.
Embodiment 6
Drop into 500kg talas of tannic acid extracting solution (talas of tannic acid content is 60%) in mixing machine, 30kg acrylamide-acrylic copolymer mixes.
Embodiment 7
Drop into 150kg talas of tannic acid powder in the exsiccant mixing machine, 16kg acrylamide-copolymer-maleic anhydride stirs.
Claims (7)
1, the preparation method of tala well drilling liquid viscosity lowering agent, it is characterized in that it is that 1: 3～10 mixed feeds intake by powder liquid weight ratio that tower is drawn beanpod powder and water or NaOH liquid or KOH liquid, stir temperature rising reflux, temperature range is 20-100 ℃, extraction time is 0.5-8 hour, after filtration, washing, concentrating filter liquor obtains aqueous extract, or drying again, pulverize powdered extract, then with extract and acrylamide-methacrylic acid potassium multipolymer, or acrylamide-copolymer-maleic anhydride, or acrylamide-acrylic copolymer is made drilling fluid thinner by weight 5～20: 1 mixed.
2, by the described method of claim 1, it is characterized in that alkali NaOH or KOH, its add-on is the 5-20% weight percent that tower draws the beanpod powder.
3, by the described method of claim 1, it is characterized in that powder liquid weight ratio is 1: 5～8.
4, by the described method of claim 1, it is characterized in that extracting temperature is 50-80 ℃.
5, by the described method of claim 1, it is characterized in that extraction time is 1-3 hour.
6, by the described method of claim 1, the weight ratio that it is characterized in that extract and polymkeric substance is 8～15: 1.
7, by claim 1 or 2 described methods, it is characterized in that the alkali consumption is the 8-15% weight percent that tower draws the beanpod powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133632 CN1257248C (en) | 2002-08-21 | 2002-08-21 | Preparation method of tala well drilling liquid viscosity lowering agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133632 CN1257248C (en) | 2002-08-21 | 2002-08-21 | Preparation method of tala well drilling liquid viscosity lowering agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414059A CN1414059A (en) | 2003-04-30 |
| CN1257248C true CN1257248C (en) | 2006-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 02133632 Expired - Fee Related CN1257248C (en) | 2002-08-21 | 2002-08-21 | Preparation method of tala well drilling liquid viscosity lowering agent |
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| CN (1) | CN1257248C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967372B (en) * | 2010-08-31 | 2014-01-01 | 武汉恩泰科技有限公司 | Water-based well drilling viscosity reducer and synthesis method thereof |
| CN104130756A (en) * | 2014-07-01 | 2014-11-05 | 青岛蓬勃石油技术服务有限公司 | High-temperature-resistant viscosity reducer for viscous oil and preparation method thereof |
| CN106146738A (en) * | 2016-06-29 | 2016-11-23 | 郭舒洋 | A kind of method that acer ginnala leaf resource prepares weatherability heavy crude thinner |
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2002
- 2002-08-21 CN CN 02133632 patent/CN1257248C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1414059A (en) | 2003-04-30 |
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Granted publication date: 20060524 |