CN101638577A - Natural feather plugging fiber used for drilling of oil and gas wells in oil fields and preparation method thereof - Google Patents
Natural feather plugging fiber used for drilling of oil and gas wells in oil fields and preparation method thereof Download PDFInfo
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- CN101638577A CN101638577A CN200910023732A CN200910023732A CN101638577A CN 101638577 A CN101638577 A CN 101638577A CN 200910023732 A CN200910023732 A CN 200910023732A CN 200910023732 A CN200910023732 A CN 200910023732A CN 101638577 A CN101638577 A CN 101638577A
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Abstract
The invention provides a natural feather plugging fiber used for drilling of oil and gas wells in oil fields and a preparation method thereof. The fiber comprises 100-120 parts of poultry feathers (with water content less than 25%), 0.2-0.4 part of surfactant, 0.0-0.8 part of washing agent, 1.0-3.0 parts of alkaline defatting agents and 120 parts of clear water. The preparation method comprises the following steps: firstly, pouring 120 parts of tap water into a liquid mixing tank; secondly, under normal temperature and normal pressure, adding 0.0-0.8 part of washing agent and 1.0-3.0 parts ofalkaline defatting agents respectively and stirring the mixture for 0.5h to prepare treatment liquid; thirdly, placing the poultry feathers into the treatment liquid to be stirred and then standing for 24h; fourthly, cleaning the treated poultry feathers with clear water and filtering and drying the poultry feathers, placing the poultry feathers into surfactant solution to be stirred for 0.5h andthen soaked, taking out the poultry feathers to be baked and ground, and sieving 95% of the products by a 10-mesh sieve. The fiber has the characteristics of good dispersibility, good plugging effect,low manufacturing cost and no environmental pollution.
Description
Technical field
The invention belongs to field of oil drilling, particularly a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber and preparation method thereof.
Background technology
Leakage is in various borehole operation such as drilling well, well cementation, well logging, various working fluids (comprising drilling fluid, grout, well finishing liquid and other fluid etc.) bleed the stratum under differential pressure action phenomenon.Drilling fluid leakage is a kind of common down hole problem in the drilling operation.According to statistics, in the serious oil gas zone drilling well of leakage, about 5%～10% rig time is used for the treated drilling fluid leakage.In case leakage takes place, and not only incurs loss through delay rig time, the loss drilling fluid disturbs geological logging work, but also may cause a series of complexcase and accidents such as well slough, bit freezing, blowout, even causes well to be scrapped, and causes great financial loss.
In recent years, along with developing rapidly of world oil and natural gas exploration and development, generally pay attention to both at home and abroad experiment and research work to leakage mechanism and prevention, treatment process technology.Because strata condition is ever-changing, causes that the condition difference such as reason, severity and drilling technology of leakage are very big, the leakage problem in the drilling process still is the great technical barrier that petroleum drilling engineering is badly in need of solution.
The used patching materials of petroleum drilling engineering mainly is divided into particle, sheet and fiber three major types.Wherein plugging fiber is the important patching materials of a class, is mainly used in the pernicious leakage that crack property and macropore leakage stratum takes place, and is the drilling leakage blockage requisite patching materials of constructing.The used plugging fiber of drilling well mainly contains two kinds at present, and a kind of is that cost is higher through the cotton fiber of processing; Another kind is a fibrous magnesium silicate, and the low effect of price is better, but biological activity is arranged, and environment is had pollution, easily causes cancer.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber and preparation method thereof, have the raising plugging effect, cost is low, characteristics free from environmental pollution.
To achieve these goals, the technical solution used in the present invention is: a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber includes: poultry feather, tensio-active agent, clean-out system, alkaline defatting agent, clear water, and its component (weight part) is:
Poultry feather (water content＜25%) 100-120 part
Tensio-active agent 0.2-0.4 part
Clean-out system 0.0-0.8 part
Alkaline defatting agent 1.0-3.0 part
120 parts in clear water
Described poultry feather is chicken feather, drake feather or goose feather.
Described tensio-active agent can be that nonionogenic tenside OP-10, nonionogenic tenside SP-80, anion surfactant alkyl bitter edible plant sodium sulfonate (Nekal BX), cats product palmityl trimethyl ammonium chloride or nonionogenic tenside OP-10 and nonionogenic tenside SP-80 form in 2: 1 ratio.The main emulsification dissemination that rises promotes feather fiber effectively to disperse in drilling fluid.
Described clean-out system is normal domestic use washing powder or sodium alkyl benzene sulfonate ABS.Mainly be that feather to slaughtered pouler cleans and degreasing.
Described alkaline defatting agent is NaOH, KOH or Na
2CO
3Mainly be grease, the blood stains on the surface of discarded poultry feather to be cleared up remove the kill harmful bacterium.
Described clear water is a tap water.
A kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of tap water;
The second, under the normal temperature and pressure stirring condition, agitator speed 100-400 rev/min, add clean-out system 0.0-0.8 part, alkaline defatting agent 1.0-3.0 part respectively, stir 0.5h, be mixed with treatment solution;
The 3rd, poultry feather 100-120 part is put into treatment solution, stir 0.5-1.0h, leave standstill 24h then.
The 4th, the poultry feather handled well is cleaned filter with clear water do, after stirring 0.5h, the surfactant soln of putting into concentration and be 0.2-0.4% soaks 2～4h again, taking out filter does, dry 10～24h then under 100～120 ℃ of temperature, pulverize with pulverizer at last, finished product 95% is crossed 10 mesh sieve.
Natural feather plugging fiber alleged among the preparation method of the present invention is:
Poultry feather (water content＜25%) 100-120 part
Tensio-active agent 0.2-0.4 part
Clean-out system 0.0-0.8 part
Alkaline defatting agent 1.0-3.0 part
120 parts in clear water
Described poultry feather is chicken feather, drake feather or goose feather.
Described tensio-active agent can be that nonionogenic tenside OP-10, nonionogenic tenside SP-80, anion surfactant alkyl bitter edible plant sodium sulfonate (Nekal BX), cats product palmityl trimethyl ammonium chloride or nonionogenic tenside OP-10 and nonionogenic tenside SP-80 form in 2: 1 ratio.The main emulsification dissemination that rises promotes feather fiber effectively to disperse in drilling fluid.
Described clean-out system is normal domestic use washing powder or sodium alkyl benzene sulfonate ABS.Mainly be that feather to slaughtered pouler cleans and degreasing.
Described alkaline defatting agent is NaOH, KOH or Na
2CO
3Mainly be grease, the blood stains on the surface of discarded poultry feather to be cleared up remove the kill harmful bacterium.
Described clear water is a tap water.
Main innovate point of the present invention is:
Plugging fiber of the present invention is from poultry feather, it is a kind of wide natural waste of originating, the poultry feather that process uses the method for this patent to handle, removed the grease and the dirt on feather surface, wetting ability strengthens, good dispersity, can in drilling fluid, form spatial grid structure, have the raising plugging effect, cost is low, characteristics free from environmental pollution.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail.
Embodiment one
A kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber includes: chicken feather, tensio-active agent OP-10, washing powder, caustic soda, tap water, and its component (weight part) is:
100 parts in chicken feather (water content 15%)
0.2 part of tensio-active agent OP-10
0.4 part in washing powder
1.0 parts in caustic soda
120 parts in tap water
A kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, 400 rev/mins of agitator speeds add 0.4 part in washing powder, 1.0 parts in caustic soda respectively, are mixed with treatment solution;
The 3rd, chicken feather is put into treatment solution for 100 parts, stir 0.5h, leave standstill 24h then.
The 4th, the chicken feather of handling well in the last step is cleaned with clear water, put into 0.2% tensio-active agent OP-10 solution, soak 4h again after stirring 0.5h, take out filter and do, then oven dry 10h in the time of 120 ℃, pulverize with pulverizer at last, with 10 purpose sieves sieve, sieving rate reaches 95%.
Embodiment two
A kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber includes: drake feather, tensio-active agent, sodium alkyl benzene sulfonate, KOH, tap water, and its component (weight part) is:
105 parts of drake feathers (water content 20%)
0.1 part of tensio-active agent SP-80
0.2 part of tensio-active agent OP-10
0.6 part of sodium alkyl benzene sulfonate
1.0 parts of KOH
120 parts in tap water
A kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, 400 rev/mins of agitator speeds add 0.6 part of sodium alkyl benzene sulfonate, 1.0 parts of KOH respectively, are mixed with treatment solution;
The 3rd, drake feather is put into treatment solution for 105 parts, stir 0.5h, leave standstill 24h then.
The 4th, the drake feather of handling well is cleaned with clear water, put into concentration and be 0.3% surfactant soln and (wherein contain 0.2% OP-10,0.1% SP-80) in, soaks 2h again behind the stirring 0.5h, take out filter and do, then at 110 ℃ of oven dry 12h, pulverize with pulverizer at last, with 10 purpose sieves sieve, sieving rate reaches 95%.
Embodiment three
A kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber includes: goose feather, tensio-active agent alkyl bitter edible plant sodium sulfonate, sodium alkyl benzene sulfonate ABS, Na
2CO
3, tap water, its component (weight part) is:
110 parts of goose feather (water content 20%)
0.4 part of sodium alkyl benzene sulfonate
0.3 part of alkyl bitter edible plant sodium sulfonate
Na
2CO
33.0 part
120 parts in tap water
A kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, under normal temperature, normal pressure, stir, 400 rev/mins of agitator speeds add 0.4 part of sodium alkyl benzene sulfonate ABS, Na respectively
2CO
33.0 part, be mixed with treatment solution;
The 3rd, 110 parts of goose feather are put into the treatment solution in step, stir 1.0h, leave standstill 24h then.
The 4th, the goose feather that the last step was handled well is cleaned with clear water, puts into concentration and be 0.3% tensio-active agent alkyl bitter edible plant sodium sulfonate solution, soak 3h again after stirring 0.5h, take out filter and do, then oven dry 18h in the time of 110 ℃, pulverize with pulverizer at last, with 10 purpose sieves sieve, sieving rate reaches 95%.
Embodiment four
A kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber includes: chicken feather, palmityl trimethyl ammonium chloride, washing powder, caustic soda, tap water, and its component (weight part) is:
115 parts in chicken feather (water content 25%)
0.2 part of palmityl trimethyl ammonium chloride
0.8 part in washing powder
1.5 parts in caustic soda
120 parts in tap water
A kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, 400 rev/mins of agitator speeds add 0.8 part in washing powder, 1.5 parts in caustic soda respectively, are mixed with treatment solution;
The 3rd, chicken feather is put into treatment solution for 115 parts, stir 0.9h, leave standstill 24h then.
The 4th, the chicken feather of handling well is cleaned with clear water, put into 0.2% tensio-active agent palmityl trimethyl ammonium chloride solution, soak 3.5h again after stirring 0.5h, take out filter and do, then oven dry 22h in the time of 115 ℃, pulverize with pulverizer at last, with 10 purpose sieves sieve, sieving rate reaches 94%.
Embodiment five
A kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber includes: drake feather, cats product palmityl trimethyl ammonium chloride, sodium alkyl benzene sulfonate ABS, KOH, tap water, and its component (weight part) is:
120 parts of drake feathers (water content 25%)
0.3 part of cats product palmityl trimethyl ammonium chloride
0.5 part of sodium alkyl benzene sulfonate ABS
1.2 parts of KOH
120 parts in tap water
A kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, 400 rev/mins of agitator speeds add 0.5 part of sodium alkyl benzene sulfonate ABS, 1.2 parts of KOH respectively, are mixed with treatment solution;
The 3rd, drake feather is put into treatment solution for 120 parts, stir 1.0h, leave standstill 24h then.
The 4th, the drake feather of handling well is cleaned with clear water, putting into concentration is 0.3% tensio-active agent cats product palmityl trimethyl ammonium chloride solution, soak 4h again after stirring 0.5h, take out filter and do, oven dry 24h in the time of 120 ℃ pulverizes with pulverizer at last then, with 10 purpose sieves sieve, sieving rate reaches 95%.
Claims (10)
1, a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, includes: poultry feather, tensio-active agent, clean-out system, alkaline defatting agent, clear water, and its component (weight part) is:
Poultry feather (water content＜25%) 100-120 part
Tensio-active agent 0.2-0.4 part
Clean-out system 0.0-0.8 part
Alkaline defatting agent 1.0-3.0 part
120 parts in clear water
Described poultry feather is chicken feather, drake feather or goose feather;
Described tensio-active agent can be that nonionogenic tenside OP-10, nonionogenic tenside SP-80, anion surfactant alkyl bitter edible plant sodium sulfonate (Nekal BX), cats product palmityl trimethyl ammonium chloride or nonionogenic tenside OP-10 and nonionogenic tenside SP-80 form in 2: 1 ratio.The main emulsification dissemination that rises promotes feather fiber effectively to disperse in drilling fluid;
Described clean-out system is normal domestic use washing powder or sodium alkyl benzene sulfonate ABS.Mainly be that feather to slaughtered pouler cleans and degreasing;
Described alkaline defatting agent is NaOH, KOH or Na
2CO
3Mainly be grease, the blood stains on the surface of discarded poultry feather to be cleared up remove the kill harmful bacterium;
Described clear water is a tap water.
2, a kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of tap water;
The second, under the normal temperature and pressure stirring condition, agitator speed 100-400 rev/min, add clean-out system 0.0-0.8 part, alkaline defatting agent 1.0-3.0 part respectively, stir 0.5h, be mixed with treatment solution;
The 3rd, poultry feather 100-120 part is put into treatment solution, stir 0.5-1.0h, leave standstill 24h then;
The 4th, the poultry feather of handling well is cleaned filter with clear water do, put into the surfactant soln that concentration is 0.2-0.4%, soak 2～4h again after stirring 0.5h, take out filter and do, under 100～120 ℃ of temperature, dry 10～24h then, pulverize with pulverizer at last, finished product 95% is crossed 10 mesh sieve.
Natural feather plugging fiber alleged among the preparation method of the present invention is:
Poultry feather (water content＜25%) 100-120 part
Tensio-active agent 0.2-0.4 part
Clean-out system 0.0-0.8 part
Alkaline defatting agent 1.0-3.0 part
120 parts in clear water
Described poultry feather is chicken feather, drake feather or goose feather;
Described tensio-active agent can be that nonionogenic tenside OP-10, nonionogenic tenside SP-80, anion surfactant alkyl bitter edible plant sodium sulfonate (Nekal BX), cats product palmityl trimethyl ammonium chloride or nonionogenic tenside OP-10 and nonionogenic tenside SP-80 form in 2: 1 ratio.The main emulsification dissemination that rises promotes feather fiber effectively to disperse in drilling fluid;
Described clean-out system is normal domestic use washing powder or sodium alkyl benzene sulfonate ABS.Mainly be that feather to slaughtered pouler cleans and degreasing;
Described alkaline defatting agent is NaOH, KOH or Na
2CO
3Mainly be grease, the blood stains on the surface of discarded poultry feather to be cleared up remove the kill harmful bacterium;
Described clear water is a tap water.
3, a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, includes: chicken feather, tensio-active agent OP-10, washing powder, caustic soda, tap water, and its component (weight part) is:
100 parts in chicken feather (water content 15%)
0.2 part of tensio-active agent OP-10
0.4 part in washing powder
1.0 parts in caustic soda
120 parts in tap water
4, a kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, agitator speed 100-400 rev/min, add 0.4 part in washing powder, 1.0 parts in caustic soda respectively, be mixed with treatment solution;
The 3rd, chicken feather is put into treatment solution for 100 parts, stir 0.5h, leave standstill 24h then;
The 4th, the chicken feather of handling well in the last step is cleaned with clear water, put into 0.2% OP-10 surfactant soln, soak 4h again after stirring 0.5h, take out filter and do, then oven dry 10h in the time of 120 ℃, pulverize with pulverizer at last, with 10 purpose sieves sieve, sieving rate reaches 95%.
5, a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, includes: drake feather, tensio-active agent, sodium alkyl benzene sulfonate, KOH, tap water, and its component (weight part) is:
105 parts of drake feathers (water content 20%)
0.1 part of tensio-active agent SP-80
0.2 part of tensio-active agent OP-10
0.6 part of sodium alkyl benzene sulfonate
1.0 parts of KOH
120 parts in tap water
6, a kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, agitator speed 100-400 rev/min, add 0.6 part of sodium alkyl benzene sulfonate, 1.0 parts of KOH respectively, be mixed with treatment solution;
The 3rd, drake feather is put into treatment solution for 105 parts, stir 0.5h, leave standstill 24h then.
The 4th, the drake feather of handling well is cleaned with clear water, put into concentration and be 0.3% surfactant soln and (wherein contain 0.2% OP-10,0.1% SP-80) in, soaks 2h again behind the stirring 0.5h, take out filter and do, then at 110 ℃ of oven dry 12h, pulverize with pulverizer at last, with 10 purpose sieves sieve, sieving rate reaches 95%.
7, a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, includes: goose feather, tensio-active agent alkyl tea sodium sulfonate, sodium alkyl benzene sulfonate ABS, Na
2CO
3, tap water, its component (weight part) is:
110 parts of goose feather (water content 20%)
0.4 part of sodium alkyl benzene sulfonate ABS
0.3 part of alkyl bitter edible plant sodium sulfonate
Na
2CO
33.0 part
120 parts in tap water
8, a kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, under normal temperature, normal pressure, stir, 400 rev/mins of agitator speeds add 0.4 part of sodium alkyl benzene sulfonate ABS, Na respectively
2CO
33.0 part, be mixed with treatment solution;
The 3rd, 110 parts of goose feather are put into the treatment solution in step, stir 1.0h, leave standstill 24h then.
The 4th, the goose feather that the last step was handled well is cleaned with clear water, puts into concentration and is 0.3% tensio-active agent alkyl bitter edible plant sodium sulfonate solution and soak 3h again, take out filter and do, oven dry 18h in the time of 110 ℃ pulverizes with pulverizer at last then, with 10 purpose sieves sieve, sieving rate reaches 95%.
9, a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, includes: drake feather, cats product palmityl trimethyl ammonium chloride, sodium alkyl benzene sulfonate ABS, KOH, tap water, and its component (weight part) is:
120 parts of drake feathers (water content 25%)
0.3 part of cats product palmityl trimethyl ammonium chloride
0.5 part of sodium alkyl benzene sulfonate ABS
1.2 parts of KOH
120 parts in tap water
10, a kind of preparation method of used for drilling of oil and gas wells in oil fields natural feather plugging fiber is characterized in that, comprises the steps:
The first, in the Agitation Tank of belt stirrer, inject 120 parts of water;
The second, stir at normal temperatures and pressures, agitator speed 1000-4000 rev/min, add 0.5 part of sodium alkyl benzene sulfonate ABS, 1.2 parts of KOH respectively, be mixed with treatment solution;
The 3rd, drake feather is put into treatment solution for 120 parts, stir 1.0h, leave standstill 24h then.
The 4th, the drake feather of handling well is cleaned with clear water, putting into concentration is 0.3% tensio-active agent cats product palmityl trimethyl ammonium chloride solution, soak 4h again after stirring 0.5h, take out filter and do, oven dry 24h in the time of 120 ℃ pulverizes with pulverizer at last then, with 10 purpose sieves sieve, sieving rate reaches 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100237321A CN101638577B (en) | 2009-08-28 | 2009-08-28 | Natural feather plugging fiber used for drilling of oil and gas wells in oil fields and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100237321A CN101638577B (en) | 2009-08-28 | 2009-08-28 | Natural feather plugging fiber used for drilling of oil and gas wells in oil fields and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101638577A true CN101638577A (en) | 2010-02-03 |
| CN101638577B CN101638577B (en) | 2012-02-01 |
Family
ID=41613757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100237321A Expired - Fee Related CN101638577B (en) | 2009-08-28 | 2009-08-28 | Natural feather plugging fiber used for drilling of oil and gas wells in oil fields and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031942A (en) * | 2010-11-30 | 2011-04-27 | 中国石油集团川庆钻探工程有限公司 | On-site construction process of water base barite liquid plugging agent with heat sensitive characteristic |
| CN104087274A (en) * | 2014-07-14 | 2014-10-08 | 中国石油集团渤海钻探工程有限公司 | Multi-stage blocking pressure-bearing plugging agent |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330157A (en) * | 2001-08-13 | 2002-01-09 | 龚建坤 | Process for tanning goose down leather |
| US7384892B2 (en) * | 2004-07-22 | 2008-06-10 | Hercules Incorporated | Water-based drilling fluids |
| CN1236035C (en) * | 2004-09-21 | 2006-01-11 | 扬州大学 | Bird feather detergent and its producing method |
-
2009
- 2009-08-28 CN CN2009100237321A patent/CN101638577B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031942A (en) * | 2010-11-30 | 2011-04-27 | 中国石油集团川庆钻探工程有限公司 | On-site construction process of water base barite liquid plugging agent with heat sensitive characteristic |
| CN102031942B (en) * | 2010-11-30 | 2013-08-28 | 中国石油集团川庆钻探工程有限公司 | On-site construction process of water base barite liquid plugging agent with heat sensitive characteristic |
| CN104087274A (en) * | 2014-07-14 | 2014-10-08 | 中国石油集团渤海钻探工程有限公司 | Multi-stage blocking pressure-bearing plugging agent |
| CN104087274B (en) * | 2014-07-14 | 2016-10-19 | 中国石油集团渤海钻探工程有限公司 | Multistage closure pressurization sealing agent |
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|---|---|
| CN101638577B (en) | 2012-02-01 |
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