CN101885960A - Alcohol defoaming agent used in method for recycling foams of foam drilling - Google Patents
Alcohol defoaming agent used in method for recycling foams of foam drilling Download PDFInfo
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- CN101885960A CN101885960A CN2010102305222A CN201010230522A CN101885960A CN 101885960 A CN101885960 A CN 101885960A CN 2010102305222 A CN2010102305222 A CN 2010102305222A CN 201010230522 A CN201010230522 A CN 201010230522A CN 101885960 A CN101885960 A CN 101885960A
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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
- C09K8/38—Gaseous or foamed well-drilling compositions
Abstract
The invention discloses an alcohol defoaming agent used in a method for recycling foams of foam drilling. The alcohol defoaming agent at least comprises low-carbon alcohol of which the structural formula is R-OH, wherein R is alkyl containing four or five carbon atoms, preferably, one or more of normal butanol, isobutanol, n-amyl alcohol, isoamyl alcohol and new amyl alcohol. The alcohol defoaming agent also comprises tributyl phosphate, wherein the volume ratio of the low-carbon alcohol to the tributyl phosphate is 1: 5 to 5:1; and the low-carbon alcohol has the functions of defoaming and stabilizing foams. Only the low-carbon alcohol needs to be added to defoam when the foams are recycled by the method, and a defoamed base fluid can be foamed again and used for drilling; the low-carbon alcohol volume content accounts for over 5 percent of the foam base fluid volume after the low-carbon alcohol is repeatedly recycled, so that the low-carbon alcohol is removed; a foaming agent is added for foaming to realize repeated recycling of the foam base fluid; and the removed low-carbon alcohol can be reused. The low-carbon alcohol does not have selectivity to the foaming agent and has high deforming velocity; and the alcohol defoaming agent can reduce foam drilling cost and realizes friendly environment.
Description
Technical field
The present invention relates to the foam drilling field, especially a kind of alcohol defoaming agent that in the foam recycle method of foam drilling, uses.
Background technology
The foam drilling technology starts from the 1950's, domesticly begin one's study and use in the eighties, and in succession in Xinjiang, oil fields such as triumph, the Liaohe River, grand celebration, long celebrating, Sichuan obtain field practice.At present, there are the problems such as the easy contaminate environment of foam that the disposable usage quantity of foam is big, return out in the foam drilling technology of acyclic use, not only increases the foam drilling cost, and is unfavorable for environment protection.
After the foam circulation of drilling well industry indication promptly will be returned out the foam froth breaking of well head by modes such as physics, machinery or chemistry, regulate the successive processes that its performance also is used for drilling well once more, thereby realize foamy foaming-froth breaking-circulation repeatedly of foaming again.The physical defoaming method is owing to operational difficulty, at present also not in petroleum drilling industry rig-site utilization.Mechanical defoaming circulation foaming process not only needs optional equipment, and defoamed ratio is not high.Chemistry froth breaking circulation foaming process generally is to adopt amphoterics to make whipping agent, utilizes the sensitivity of amphoterics to soda acid, realizes the foamy recycle by regulating base fluid pH value.This method has selectivity to whipping agent, only limits to the both sexes whipping agent; In working cycle, need add acid-alkali accommodation base fluid pH value repeatedly; And along with the increasing of cycle index, foaming properties descends gradually.
The alcohols that uses in the petroleum industry generally is as the disposable use of defoamer at present, or uses separately as suds-stabilizing agent, and the two generally is not with a kind of alcohols material, and the mechanism of action is different with process.When alcohols is made defoamer, mainly be to act on foam surface,, reduce the foam local surface tension, can cause foam to be vanished rapidly because it is sprawled fast and contact with air bubble liquid-membrane at foam surface.When alcohols is made suds-stabilizing agent, mainly be to act on foam base fluid, low-carbon alcohol is dissolved in the foam base fluid, can strengthen solution surface viscosity and improve bubble film intensity.If find a kind of low-carbon alcohol, and combine, can realize the recycle of drilling well foamy with foam drilling technology with froth breaking and steady bubble effect.
Summary of the invention
The technical problem to be solved in the present invention is: at above-mentioned situation, find a kind of alcohols material with froth breaking and steady bubble effect, and combine with foam drilling technology, realize the recycle of drilling well foamy.
The contriver finds that some low-carbon alcohol is with strong defoaming and the weak characteristics that press down bubble property, and promptly same low-carbon alcohol not only can be used as defoamer and uses, and also has the ability of steady bubble, only needs to add this type of low-carbon alcohol in foam base fluid, can realize the foamy recycle.Add a small amount of low-carbon alcohol in the foam system that has foamed, low-carbon alcohol is sprawled and is contacted with air bubble liquid-membrane at foam surface fast, reduces the foam local surface tension, causes foam to be vanished rapidly; In solubility range, after foam surface plays the low-carbon alcohol froth breaking of froth breaking effect, promptly sink rapidly and be dissolved in the foam base fluid, bring into play the steady bubble effect that it strengthens solution surface viscosity and improves bubble film intensity, and lose the froth breaking effect, stirring this foam base fluid can foam once more, and so circulation can realize the foamy recycle.
In order to reach the foregoing invention purpose, the technical scheme that the invention process is following:
A kind of alcohol defoaming agent that uses in the foam recycle method of foam drilling comprises that at least a structural formula is that R-OH, R are the low-carbon alcohol that contains the alkyl of 4 carbon atoms or 5 carbon atoms.
As optimal way, described low-carbon alcohol is one or more in propyl carbinol, isopropylcarbinol, Pentyl alcohol, primary isoamyl alcohol, the neopentyl alcohol.
As optimal way, described alcohol defoaming agent also comprises tributyl phosphate.
As optimal way, the volume ratio of described low-carbon alcohol and tributyl phosphate is 1:5～5:1.
Low-carbon alcohol of the present invention does not have selectivity to whipping agent, and antifoaming speed is fast, be applicable to that the oil field uses whipping agent always, as Sodium dodecylbenzene sulfonate (ABS), sodium lauryl sulphate (K12), lauryl alcohol Soxylat A 25-7 (AEO), fatty alcohol ether sulphate (AES).
Other additive can add according to the actual well drilled needs, as suds-stabilizing agent, borehole wall stabilizer, sanitas etc.
Low-carbon alcohol of the present invention, the whipping agent that is used to foam and the additive that adds as required all are the commercially available organic compound that the chemical plant produces.
Beneficial effect of the present invention: 1. adopt this method to carry out the foam circulation, only need to add alcohol defoaming agent, need not add acid-alkali accommodation base fluid pH value in working cycle, alcohol defoaming agent can utilize once more; 2. alcohol defoaming agent does not have selectivity to whipping agent, and antifoaming speed is fast; 3. if the low-carbon alcohol volume content in the foam base fluid accounts for more than 5% of foam base fluid volume after repeatedly circulating, then low-carbon alcohol is removed, realized the recycled for multiple times of foam base fluid; 4. can reduce the foam drilling cost, realize environmental friendliness.
Description of drawings
Fig. 1 is the used foam circulation device figure of laboratory experiment.
Wherein, 1. base fluid jar; 2. stopping valve; 3. impeller pump; 4. orifice-plate flowmeter; 5. air compressor machine; 6. blow-off valve; 7. gas holder; 8. stopping valve; 9. spinner-type flowmeter; 10. stopping valve; 11. hole formula frothing machine; 12. tensimeter; 13. stopping valve; 14. foam observation tube; 15. stopping valve; 16. foam sampler; 17. tensimeter; 18. stopping valve; 19. shower; 20. agitator; 21. defoaming compartment; 22. tensimeter; 23. stopping valve; 24. volume pump; 25. defoamer storage tank; 26. stopping valve; 27. impeller pump; 28. stopping valve; 29. surge tank; 30. thief hole; 31. stopping valve; 32. impeller pump; 33. stopping valve.
Embodiment
Disclosed all features in this specification sheets, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Among the following embodiment, each composition code name of filling a prescription is as follows:
K12 is a sodium lauryl sulphate, and ABS is a Sodium dodecylbenzene sulfonate, and XC is a biological polymer, and HV-CMC is high sticking carboxymethyl cellulose.
The used foam circulation device of laboratory experiment is seen accompanying drawing 1.Its experimentation is as described below:
In foam base fluid jar 1, prepare certain density foam base fluid in advance, foam base fluid enters hole formula frothing machine 11 by stopping valve 2, impeller pump 3, orifice-plate flowmeter 4, air enters hole formula frothing machine 11 via air compressor machine 5, gas holder 7, stopping valve 8, spinner-type flowmeter 9, stopping valve 10, and the blow-off valve 6 on the gas holder 7 is used to regulate the pressure equilibrium of gas holder with stable.By regulating parameters such as base fluid performance, vapour-liquid ratio, can change the foaming properties that generates in the hole formula frothing machine.Enter foam observation tube 14 from the tensimeter 12 and the stopping valve 13 effusive foams of hole formula frothing machine 11 exit end.Enter defoaming compartment 21 from the stopping valve 15 effusive foams of foam observation tube 14 bottoms through foam sampler 16, tensimeter 17 and stopping valve 18.In defoamer storage tank 25, prepare certain density defoamer in advance, comprise the mixture of low-carbon alcohol or low-carbon alcohol and tributyl phosphate; Defoamer in the defoamer storage tank 25 enters shower 19 by volume pump 24, stopping valve 23 and tensimeter 22, by shower 19 defoamer evenly is sprayed onto on the foam, realizes the purpose of quick froth breaking, and turn on agitator 20 in froth breaking.Liquid behind the broken bubble enters surge tank 29 from defoaming compartment 21 bottoms through stopping valve 26, impeller pump 27, stopping valve 28, for ease of foaming properties behind the monitoring froth breaking, in surge tank 29 bottoms thief hole 30 is installed.Foam base fluid in the surge tank 29 is back to foam base fluid jar 1 via stopping valve 31, impeller pump 32, stopping valve 33, realizes the foamy recycle.
Following examples describe application of the present invention in detail.
Embodiment 1
Prepare the 82L foam base fluid in advance in foam base fluid jar 1, calculate by mass percentage concentration, the foam base fluid prescription is: 0.8%K12,0.2%XC, 0.1%HV-CMC, all the other are tap water.The adjustments of gas flow is 1.6m
3/ min, liquid flow rate are 20L/min, and this moment, vapour-liquid ratio was 80, was added with the 4.5L primary isoamyl alcohol in the defoamer storage tank 25, with the flow of 0.12L/min primary isoamyl alcohol evenly are sprayed onto on the foam, simultaneously with 300r/min rotating speed turn on agitator.Foam solution behind the froth breaking enters surge tank 29, base fluid jar 1, realizes the foamy recycle.
The initiate primary isoamyl alcohol of each circulation is 0.6% of a foam base fluid volume, for ease of observing and monitor foaming properties behind each froth breaking, the foam base fluid of every interval 4min after with froth breaking in the surge tank got to the foam base fluid jar by impeller pump, simultaneously from the sampling of buffering pot bottom, with Waring agitator test froth quality and transformation period, monitoring result is shown in Table 1.By table 1 as seen, this foam base fluid is after 9 circulations, just there have been more decline foam volume and transformation period, the primary isoamyl alcohol volume that enter in the base fluid jar this moment is 4.32L, the foam base fluid cumulative volume is 86.32L, at this moment the primary isoamyl alcohol volume content accounts for 5% of foam base fluid cumulative volume, need primary isoamyl alcohol is removed, the primary isoamyl alcohol of removing enters defoamer and adds a jar recycling, replenish 65.6gK12 whipping agent (K12 dosage be former base fluid dosage 10%) in the base fluid jar after, this foam base fluid can foam again, and foaming properties reaches initial foam performance, carry out new foam circulation, thereby realize the foamy recycled for multiple times.
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Table 1 foam circulation experiment result
| Cycle index | Foam volume (ml) | Transformation period (min) |
| 0 | 525 | 31.5 |
| 1 | 510 | 28.4 |
| 2 | 460 | 26.1 |
| 3 | 440 | 24.3 |
| 4 | 420 | 21.2 |
| 5 | 410 | 18.2 |
| 6 | 380 | 17.0 |
| 7 | 375 | 16.1 |
| 8 | 360 | 15.4 |
| 9 | 340 | 13.2 |
| 10 | 530 | 30.7 |
Annotate: before the tenth test, primary isoamyl alcohol is removed, replenished 65.6g whipping agent K12 again.
Embodiment 2
Prepare the 100L foam base fluid in advance in the foam base fluid jar, calculate by mass percentage concentration, the foam base fluid prescription is: 0.6%ABS, 0.2%XC, 0.2%HV-CMC, all the other are tap water.The adjustments of gas flow is 1.5m
3/ min, liquid flow rate are 21.1L/min, and this moment, vapour-liquid ratio was 71.1.Be added with the 6.5L propyl carbinol in the defoamer storage tank, propyl carbinol evenly be sprayed onto on the foam, simultaneously with 250r/min rotating speed turn on agitator with the flow of 0.19L/min.Foam solution behind the froth breaking enters surge tank, base fluid storage tank, realizes the foamy recycle.
The initiate propyl carbinol of each circulation is 0.9% of a foam base fluid volume, for ease of observing and monitor foaming properties behind each froth breaking, the foam base fluid of every interval 4.5min after with froth breaking in the surge tank got to the foam base fluid jar by impeller pump, simultaneously from the sampling of buffering pot bottom, with Waring agitator test froth quality and transformation period, monitoring result is shown in Table 2.By table 2 as seen, this foam base fluid is after 7 circulations, and just there have been more decline foam volume and transformation period, and this explanation the present invention used propyl carbinol can be used for the foam circulation, all need not replenish new whipping agent preceding 7 times.
Foam base fluid is after 7 circulations, the propyl carbinol volume that enters in the base fluid jar is 5.98L, the foam base fluid cumulative volume is 105.98L, at this moment the propyl carbinol volume content accounts for 5.6% of foam base fluid cumulative volume, needs propyl carbinol is removed, and the propyl carbinol of removal enters defoamer and adds a jar recycling, after in the base fluid jar, replenishing the 60gABS whipping agent, this foam base fluid can foam again, carries out new foam circulation, thereby realizes the foamy recycled for multiple times.
Table 2 foam circulation experiment result
| Cycle index | Foam volume (ml) | Transformation period (min) |
| 0 | 510 | 22.5 |
| 1 | 490 | 18.4 |
| 2 | 460 | 16.5 |
| 3 | 430 | 15.3 |
| 4 | 410 | 13.1 |
| 5 | 390 | 12.8 |
| 6 | 380 | 11.0 |
| 7 | 340 | 10.3 |
| 8 | 515 | 21.7 |
Annotate: before the 8th test, propyl carbinol is removed, replenished 60g whipping agent ABS again.
Prepare the 95L foam base fluid in advance in the foam base fluid jar, calculate by mass percentage concentration, the foam base fluid prescription is: 0.6%ABS, 0.2%XC, 0.2%HV-CMC, all the other are tap water.The adjustments of gas flow is 1.5m
3/ min, liquid flow rate are 19.7L/min, and this moment, vapour-liquid ratio was 76.1.Be added with the mixture of 6.5L Pentyl alcohol and tributyl phosphate in the defoamer storage tank, both volume ratios are 1:5, evenly be sprayed onto on the foam with the flow of 0.16L/min mixture, simultaneously with 250r/min rotating speed turn on agitator Pentyl alcohol and tributyl phosphate.Foam solution behind the froth breaking enters surge tank, base fluid storage tank successively, thereby realizes the foamy recycle.
The mixture of each initiate Pentyl alcohol of circulation and tributyl phosphate is 0.81% of a foam base fluid volume, for ease of observing and monitor foaming properties behind each froth breaking, the foam base fluid of every interval 4.5min after with froth breaking in the surge tank got to the foam base fluid jar by impeller pump, simultaneously from the sampling of buffering pot bottom, with Waring agitator test froth quality and transformation period, monitoring result is shown in Table 3.By table 3 as seen, this foam base fluid is after 8 circulations, and just there have been more decline foam volume and transformation period, and the mixture of the used Pentyl alcohol of this explanation the present invention and tributyl phosphate can be used for foam and circulates, and all need not replenish new whipping agent preceding 8 times.
Foam base fluid is after 8 circulations, entering the Pentyl alcohol in the base fluid jar and the volume of mixture of tributyl phosphate is 5.76L, the foam base fluid cumulative volume is 100.76L, at this moment the volume of mixture content of Pentyl alcohol and tributyl phosphate accounts for 5.7% of foam base fluid cumulative volume, need the mixture of Pentyl alcohol and tributyl phosphate is removed, the Pentyl alcohol of removing and the mixture of tributyl phosphate enter defoamer and add a jar recycling, after in the base fluid jar, replenishing the 57gABS whipping agent, this foam base fluid can foam again, thereby realizes the foamy recycled for multiple times.
Table 3 foam circulation experiment result
| Cycle index | Foam volume (ml) | Transformation period (min) |
| 0 | 510 | 22.5 |
| 1 | 480 | 19.7 |
| 2 | 475 | 18.1 |
| 3 | 440 | 16.8 |
| 4 | 400 | 15.1 |
| 5 | 390 | 13.2 |
| 6 | 380 | 12.2 |
| 7 | 375 | 11.3 |
| 8 | 340 | 9.3 |
| 9 | 505 | 22.1 |
Annotate: before the 9th test, the mixture of Pentyl alcohol and tributyl phosphate is removed, replenished 57g whipping agent ABS again.
Embodiment 4
Prepare the 90L foam base fluid in advance in the foam base fluid jar, calculate by mass percentage concentration, the foam base fluid prescription is: 0.6%ABS, 0.2%XC, 0.2%HV-CMC, all the other are tap water.The adjustments of gas flow is 1.5m
3/ min, liquid flow rate are 19.5L/min, and this moment, vapour-liquid ratio was 76.9.Be added with the mixture of 70L isopropylcarbinol and tributyl phosphate in the defoamer storage tank, both volume ratios are 5:1, evenly are sprayed onto on the foam with the flow of the 0.17L/min mixture with isopropylcarbinol and tributyl phosphate, simultaneously with 250r/min rotating speed turn on agitator.Foam solution behind the froth breaking enters surge tank, base fluid storage tank successively, thereby realizes the foamy recycle.
The mixture of each initiate isopropylcarbinol of circulation and tributyl phosphate is 0.87% of a foam base fluid volume, for ease of observing and monitor foaming properties behind each froth breaking, the foam base fluid of every interval 4.5min after with froth breaking in the surge tank got to the foam base fluid jar by impeller pump, simultaneously from the sampling of buffering pot bottom, with Waring agitator test froth quality and transformation period, monitoring result is shown in Table 4.By table 4 as seen, this foam base fluid is after 9 circulations, and just there have been more decline foam volume and transformation period, and the mixture of the used isopropylcarbinol of this explanation the present invention and tributyl phosphate can be used for foam and circulates, and all need not replenish new whipping agent preceding 9 times.
Foam base fluid is after 9 circulations, entering the isopropylcarbinol in the base fluid jar and the volume of mixture of tributyl phosphate is 6.9L, the foam base fluid cumulative volume is 96.9L, at this moment the volume of mixture content of isopropylcarbinol and tributyl phosphate accounts for 7.1% of foam base fluid cumulative volume, need the mixture of isopropylcarbinol and tributyl phosphate is removed, the low-carbon alcohol of removing enters defoamer and adds a jar recycling, after in the base fluid jar, replenishing the 54gABS whipping agent, this foam base fluid can foam again, thereby realizes the foamy recycled for multiple times.
Table 4 foam circulation experiment result
| Cycle index | Foam volume (ml) | Transformation period (min) |
| 0 | 510 | 22.5 |
| 1 | 480 | 19.7 |
| 2 | 475 | 18.1 |
| 3 | 440 | 16.8 |
| 4 | 400 | 15.1 |
| 5 | 390 | 13.2 |
| 6 | 380 | 12.2 |
| 7 | 375 | 11.3 |
| 8 | 350 | 9.8 |
| 9 | 340 | 9.3 |
| 10 | 515 | 22.3 |
Annotate: before the 10th test, the mixture of isopropylcarbinol and tributyl phosphate is removed, replenished 54g whipping agent ABS again.
Embodiment 5
Prepare the 90L foam base fluid in advance in the foam base fluid jar, calculate by mass percentage concentration, the foam base fluid prescription is: 0.8%K12,0.2%XC, 0.2%HV-CMC, all the other are tap water.The adjustments of gas flow is 1.6m
3/ min, liquid flow rate are 21.3L/min, and this moment, vapour-liquid ratio was 75.1, was added with the 5.5L neopentyl alcohol in the defoamer storage tank, with the flow of 0.16L/min neopentyl alcohol evenly are sprayed onto on the foam, simultaneously with 300r/min rotating speed turn on agitator.Foam solution behind the froth breaking enters surge tank, base fluid jar, realizes the foamy recycle.
The initiate neopentyl alcohol of each circulation is 0.75% of a foam base fluid volume, for ease of observing and monitor foaming properties behind each froth breaking, the foam base fluid of every interval 4min after with froth breaking in the surge tank got to the foam base fluid jar by impeller pump, simultaneously from the sampling of buffering pot bottom, with Waring agitator test froth quality and transformation period, monitoring result is shown in Table 5.By table 5 as seen, this foam base fluid is after 8 circulations, just there have been more decline foam volume and transformation period, the neopentyl alcohol volume that enter in the base fluid jar this moment is 5.12L, the foam base fluid cumulative volume is 95.12L, at this moment the neopentyl alcohol volume content accounts for 5.4% of foam base fluid cumulative volume, need neopentyl alcohol is removed, the neopentyl alcohol of removing enters defoamer and adds a jar recycling, replenish the 72gK12 whipping agent in the base fluid jar after, this foam base fluid can foam again, and foaming properties reaches initial foam performance, carry out new foam circulation, thereby realize the foamy recycled for multiple times.
Table 5 foam circulation experiment result
| Cycle index | Foam volume (ml) | Transformation period (min) |
| 0 | 505 | 36.7 |
| 1 | 490 | 33.2 |
| 2 | 460 | 28.6 |
| 3 | 430 | 25.1 |
| 4 | 410 | 24.1 |
| 5 | 390 | 19.2 |
| 6 | 380 | 17.8 |
| 7 | 365 | 16.9 |
| 8 | 340 | 15.8 |
| 9 | 510 | 36.2 |
Annotate: before the 9th test, neopentyl alcohol is removed, replenished 72g whipping agent K12 again.
Claims (4)
1. alcohol defoaming agent that uses in the foam recycle method of foam drilling, it is characterized in that: described alcohol defoaming agent comprises that at least a structural formula is that R-OH, R are the low-carbon alcohol that contains the alkyl of 4 carbon atoms or 5 carbon atoms.
2. alcohol defoaming agent as claimed in claim 1 is characterized in that: described low-carbon alcohol is one or more in propyl carbinol, isopropylcarbinol, Pentyl alcohol, primary isoamyl alcohol, the neopentyl alcohol.
3. alcohol defoaming agent as claimed in claim 1 or 2 is characterized in that: described alcohol defoaming agent also comprises tributyl phosphate.
4. alcohol defoaming agent as claimed in claim 3 is characterized in that: the volume ratio of described low-carbon alcohol and tributyl phosphate is 1:5～5:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102305222A CN101885960A (en) | 2010-07-20 | 2010-07-20 | Alcohol defoaming agent used in method for recycling foams of foam drilling |
| PCT/CN2011/077127 WO2012010062A1 (en) | 2010-07-20 | 2011-07-14 | Alcohol defoaming agent used in method for recycling foam for foam drilling |
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| CN2010102305222A CN101885960A (en) | 2010-07-20 | 2010-07-20 | Alcohol defoaming agent used in method for recycling foams of foam drilling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010062A1 (en) * | 2010-07-20 | 2012-01-26 | 西南石油大学 | Alcohol defoaming agent used in method for recycling foam for foam drilling |
| WO2012010061A1 (en) * | 2010-07-20 | 2012-01-26 | 西南石油大学 | Method for circulatory use of foam in foam drilling by means of low-carbon alcohol |
| CN107174841A (en) * | 2017-06-05 | 2017-09-19 | 中国石油集团渤海钻探工程有限公司 | Fracturing outlet liquid liquid antifoam agent and preparation method thereof |
| CN112240173A (en) * | 2019-07-18 | 2021-01-19 | 中国石油化工股份有限公司 | Oil and gas well sand washing and well flushing method based on foam circulation, and defoaming solution and foaming solution for oil and gas well sand washing and well flushing |
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| WO2012010061A1 (en) * | 2010-07-20 | 2012-01-26 | 西南石油大学 | Method for circulatory use of foam in foam drilling by means of low-carbon alcohol |
| CN107174841A (en) * | 2017-06-05 | 2017-09-19 | 中国石油集团渤海钻探工程有限公司 | Fracturing outlet liquid liquid antifoam agent and preparation method thereof |
| CN112240173A (en) * | 2019-07-18 | 2021-01-19 | 中国石油化工股份有限公司 | Oil and gas well sand washing and well flushing method based on foam circulation, and defoaming solution and foaming solution for oil and gas well sand washing and well flushing |
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| WO2012010062A1 (en) | 2012-01-26 |
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