CN101186654A - Method for extracting xanthan gum used for calcium treated drilling fluid - Google Patents
Method for extracting xanthan gum used for calcium treated drilling fluid Download PDFInfo
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- CN101186654A CN101186654A CNA2007101154346A CN200710115434A CN101186654A CN 101186654 A CN101186654 A CN 101186654A CN A2007101154346 A CNA2007101154346 A CN A2007101154346A CN 200710115434 A CN200710115434 A CN 200710115434A CN 101186654 A CN101186654 A CN 101186654A
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- xanthan gum
- drilling fluid
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- calcium
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- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention discloses an extraction method of xanthan gum calcium treated drilling fluid, which comprises adding 0.5-4.5% calcium chloride solution of mass ratio into xanthan gum fermentation liquor, raising temperature to 85-95DEG C, keeping the temperature for 30-90min, cooling to 40DEG C, adding alcohol or alcohol isopropylicum of 50-70% volume concentration, mixing for 30-90min, separating solid and liquid, adding the solid into alcohol or alcohol isopropylicum of 60-75% volume concentration, mixing for 30-60min, separates solid and liquid, drying and breaking the solid at 60-70DEG C. The extracted xanthan gum of the invention can be used for calcium treated drilling fluid of oil drilling, while the added amount is 0.3-0.5% of calcium treated drilling fluid of mass percentage, and the temperature resistant capability can reach 121DEG C. The inventive product has significant rheological property and shear viscosity reduction property, to improve drilling speed effectively, via which drilling fluid has higher well barrel washing ability and suspension ability. The property of the xanthan gum is unchanged in application.
Description
Technical field: the invention belongs to xanthan gum extractive technique field, relate to a kind of extracting method that is used for the xanthan gum of calcium treated drilling fluid.
Background technology: drilling fluid (Drilling Fluids) is meant the general name that satisfies the various circulating fluid of drilling well need of work in the oil/gas drilling process with its multiple function, and drilling fluid claims drilling mud (DrillingMuds) again or abbreviates mud (Muds) as.Continuous development along with the drilling fluid Technology, the kind of drilling fluid is more and more, wherein, calcium treated drilling fluid (Calcium-treated Drilling Fluid) is to use on the basis of dispersed drilling fluid, in the sixties in 20th century grow up have better anti-salt, calcium contamination ability and shale hydration had strong inhibiting class drilling fluid.
Xanthan gum is a kind of biological polymer, be a kind of pale yellow powder, through can be soluble in water fully after stirring and formation heavy-gravity solution, because xanthan gum solution has good tackifying, rheological, chemical stabilizer and stronger mechanical resistance degradation property, and can high temperature resistance, under 121 ℃ of conditions, still can keep its characteristic, therefore, the displacing agent that can be widely used in oil-field development not only can reduce the region of bypassed oil, and can improve recovery ratio.At present, in petroleum drilling, xanthan gum is mainly used in the suspension drilling cuttings, falls the leak-off and the displacement of reservoir oil for the third time, studies show that, the xanthan gum solution of 0.5% lower concentration can keep the viscosity of drilling fluid and control its rheological property, and, saving power little at the drill bit position of high speed rotating viscosity pole but keeps higher viscosity at the boring position, thereby prevents slump in.But the divalent calcium ion in the drilling fluid causes xanthan gum result of use variation easily, does not still have head it off both at home and abroad so far.
Summary of the invention: the purpose of this invention is to provide a kind of extracting method that is used for the xanthan gum of calcium treated drilling fluid, this xanthan gum can solve the technical problem that divalent calcium ion in the drilling fluid causes xanthan gum result of use variation easily.
The present invention is used for the extracting method of the xanthan gum of calcium treated drilling fluid, and its main points are by following processing step operation:
1) add calcium chloride solution in xanthan gum fermentation broth, and stir, the control calcium chloride content is that the weight percent of xanthan gum content is 0.5～4.5%;
2) above-mentioned solution is warming up to 85～95 ℃, is incubated 30～90 minutes, and continue to stir;
3) heating postcooling to 40 ℃ adds alcohol or Virahol, and the concentration of volume percent of alcohol or Virahol stirred 30～90 minutes 50～70% in the control solution;
4) carry out solid-liquid separation then;
5) step 4) is separated the solid that obtains and join in alcohol or the Virahol again, the concentration of volume percent of alcohol or Virahol stirred 30～60 minutes 60～75% in the control solution;
6) carry out solid-liquid separation again, the gained solid carries out drying under 60～70 ℃;
7) dried solid is pulverized, promptly got the xanthan gum that is used for calcium treated drilling fluid.
The xanthan gum that the inventive method purification obtains is used for petroleum drilling and contains divalent ion in the calcium treated drilling fluid of 10.0g/L, and its addition is 0.3～0.5% of a calcium treated drilling fluid weight percent, and the temperature resistance ability satisfies 121 ℃.The drilling fluid that the xanthan gum of purifying with the present invention is handled, xanthan gum with respect to other kinds has outstanding rheological and superior shearing viscosity reduction characteristic, can improve drilling speed greatly, make drilling fluid have higher pit shaft and clean effect and suspending power, and in use the impact of performance of xanthan gum can variation, can reduce the usage quantity of xanthan gum, save drilling cost.
Embodiment:
Embodiment 1: be used for the extracting method of the xanthan gum of calcium treated drilling fluid, operate by following processing step:
1) add calcium chloride solution in xanthan gum fermentation broth, and stir, the control calcium chloride content is that the weight percent of xanthan gum content is 3.0%;
2) above-mentioned solution is warming up to 90 ℃, is incubated 70 minutes, and continue to stir;
3) heating postcooling to 40 ℃ adds alcohol, and the concentration of volume percent of alcohol stirred 60 minutes 65% in the control solution;
4) carry out solid-liquid separation then;
5) step 4) is separated the solid that obtains and join in the alcohol again, the concentration of volume percent of alcohol stirred 50 minutes 70% in the control solution;
6) carry out solid-liquid separation again, the gained solid carries out drying under 65 ℃;
7) dried solid is pulverized, promptly got the xanthan gum that is used to prepare calcium treated drilling fluid.
Embodiment 2: according to embodiment 1,
1) add calcium chloride solution in xanthan gum fermentation broth, and stir, the control calcium chloride content is that the weight percent of xanthan gum content is 4.5%;
2) above-mentioned solution is warming up to 95 ℃, is incubated 390 minutes, and continue to stir;
3) heating postcooling to 40 ℃ adds Virahol, and the concentration of volume percent of Virahol stirred 90 minutes 70% in the control solution;
4) carry out solid-liquid separation then;
5) step 4) is separated the solid that obtains and join in the Virahol again, the concentration of volume percent of Virahol stirred 60 minutes 75% in the control solution;
6) carry out solid-liquid separation again, the gained solid carries out drying under 70 ℃;
7) dried solid is pulverized, promptly got the xanthan gum that is used for calcium treated drilling fluid.
Claims (1)
1. extracting method that is used for the xanthan gum of calcium treated drilling fluid is characterized in that by following processing step operation:
1) add calcium chloride solution in xanthan gum fermentation broth, and stir, the control calcium chloride content is that the weight percent of xanthan gum content is 0.5～4.5%;
2) above-mentioned solution is warming up to 85～95 ℃, is incubated 30～90 minutes, and continue to stir;
3) heating postcooling to 40 ℃ adds alcohol or Virahol, and the concentration of volume percent of alcohol or Virahol stirred 30～90 minutes 50～70% in the control solution;
4) carry out solid-liquid separation then;
5) step 4) is separated the solid that obtains and join in alcohol or the Virahol again, the concentration of volume percent of alcohol or Virahol stirred 30～60 minutes 60～75% in the control solution;
6) carry out solid-liquid separation again, the gained solid carries out drying under 60～70 ℃;
7) dried solid is pulverized, promptly got the xanthan gum that is used for calcium treated drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101154346A CN101186654A (en) | 2007-12-12 | 2007-12-12 | Method for extracting xanthan gum used for calcium treated drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101154346A CN101186654A (en) | 2007-12-12 | 2007-12-12 | Method for extracting xanthan gum used for calcium treated drilling fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101186654A true CN101186654A (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101154346A Pending CN101186654A (en) | 2007-12-12 | 2007-12-12 | Method for extracting xanthan gum used for calcium treated drilling fluid |
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| CN (1) | CN101186654A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838340A (en) * | 2010-05-21 | 2010-09-22 | 淄博中轩生化有限公司 | Improved method for extracting biological extracellular polysaccharide |
| CN103205471A (en) * | 2013-04-26 | 2013-07-17 | 新疆阜丰生物科技有限公司 | Xanthan gum preparation method suitable for high-concentration multivalent ion liquid |
| CN103805157A (en) * | 2014-03-04 | 2014-05-21 | 中国石油集团渤海钻探工程有限公司 | Supermolecule biopolymer fracturing fluid |
-
2007
- 2007-12-12 CN CNA2007101154346A patent/CN101186654A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838340A (en) * | 2010-05-21 | 2010-09-22 | 淄博中轩生化有限公司 | Improved method for extracting biological extracellular polysaccharide |
| CN103205471A (en) * | 2013-04-26 | 2013-07-17 | 新疆阜丰生物科技有限公司 | Xanthan gum preparation method suitable for high-concentration multivalent ion liquid |
| CN103205471B (en) * | 2013-04-26 | 2014-07-09 | 新疆阜丰生物科技有限公司 | Xanthan gum preparation method suitable for high-concentration multivalent ion liquid |
| CN103805157A (en) * | 2014-03-04 | 2014-05-21 | 中国石油集团渤海钻探工程有限公司 | Supermolecule biopolymer fracturing fluid |
| CN103805157B (en) * | 2014-03-04 | 2016-06-15 | 中国石油集团渤海钻探工程有限公司 | Supermolecule biopolymer fracturing fluid |
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Open date: 20080528 |