CN105038731A - Modified disaccharide mud shale inhibitor for drilling fluid and preparation method thereof - Google Patents
Modified disaccharide mud shale inhibitor for drilling fluid and preparation method thereof Download PDFInfo
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- CN105038731A CN105038731A CN201510423049.2A CN201510423049A CN105038731A CN 105038731 A CN105038731 A CN 105038731A CN 201510423049 A CN201510423049 A CN 201510423049A CN 105038731 A CN105038731 A CN 105038731A
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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
- C09K8/03—Specific additives for general use in well-drilling compositions
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- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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Abstract
The present invention provides a modified disaccharide mud shale inhibitor for drilling fluid and a preparation method thereof. The method is as below: adding the required ratio balance water in a sealed reactor by weight percentage, adding 50%-70% of natural disaccharide, stirring, dissolving, introducing pure nitrogen, stirring for 0.5 h; successively and uniformly adding 5%-7% of bromoacetic acid and 2%-5% of sodium hydroxide at 80-90 DEG C, and stirring for 1 h; uniformly adding 2.5%-3.5% of acetbromamide at 120-125 DEG C in 1 h, and reacting and stirring for 1 h; then successively adding 0.1%-0.5% of acetic anhydride, 0.5%-1.5% of N-bromoacetamide amide, reacting and stirring for 3 h, stopping heating, adding 0.2%-0.6% of acetic acid to adjust the pH value to 8-9; and cooling, drying at 100-110 DEG C, and crushing to obtain the inhibitor. The present invention satisfies the requirements of stabilization of wall of a well, protection of producing layer and environmental protection, while reducing the production cost of mud shale inhibitor.
Description
Technical field
The present invention relates to water-base drilling fluid shale inhibitor and preparation method thereof, especially a kind of drilling fluid modification disaccharide shale inhibitor and preparation method thereof.
Background technology
Ordos Basin Changqing oilfields conventional well, horizontal well, in prospect pit drilling process, the drilling fluid shale inhibitor of current use is various in style, inorganic inhibitor is as Repone K, sodium-chlor, calcium chloride etc., organic inhibitor is as polymeric alcohol, ethylene glycol, cationic polymers etc., along with new two methods (new Law on Environmental Protection, new safe production act) brute force implement, inorganic salts inhibitor will be prohibitted the use to protect water source, prevent it from underground water is caused to the environmental pollution being difficult to retrieve, and part organic inhibitor is chosen due to starting material, the reasons such as production and processing technology cause the finished product to contain environment all in various degree, the poisonous and hazardous material of health of human body, and quality is unstable again, add and pursue market juice, some product comprehensive quality wherein more effectively can not meet safety drilling, the demand of protection of the environment.Changqing oilfields oil gas equivalent realizes the ambitious goal of 5,000 ten thousand tons/year in recent years, in order to (hypotonic " three is low ", low pressure, low abundance) oil-gas field, even under the overall background of ultra-low penetration type, to realize stable yields volume increase at some block, horizontal well scale (particularly horizontal well, ultra-long horizontal well, gas storage well etc.) also constantly expand, horizontal section also constantly lengthens extension, the consumption of drilling fluid shale inhibitor is increased severely, simultaneously to the stabilizing borehole ability of drilling and completing fluids, protection of the environment proposes high requirement, make with natural material research environment-protecting asepsis, biodegradable drilling fluid shale inhibitor particularly seems urgent.
Along with China's disaccharide place of production is many, abundance, low price, for research and development low cost, eco-friendly drilling fluid shale inhibitor provide effective, a brand-new approach.
Summary of the invention
The object of the invention is to raw material development lifeless matter toxicity, biodegradable drilling fluid shale inhibitor based on natural disaccharide; meet the Changqing oilfields scale development process stabilization borehole wall, protection payzone, protection of the environment etc. to the requirement of drilling fluid shale inhibitor, simultaneously water-base drilling fluid shale inhibitor that can reduce shale inhibitor preparation cost and preparation method thereof again.
For this reason, the invention provides a kind of drilling fluid modification disaccharide shale inhibitor, its technical scheme is: a kind of drilling fluid modification disaccharide shale inhibitor, is made up of following starting material: natural disaccharide: 50% ~ 70%, bromoacetic acid: 5% ~ 7% by weight percentage, diethanolamine: 2.5% ~ 3.5%, sodium hydroxide: 2% ~ 5%, diacetyl oxide: 0.1% ~ 0.5%, N-bromoacetamide 0.5% ~ 1.5%, Glacial acetic acid: 0.2% ~ 0.6%, all the other are water.
Above-mentioned natural disaccharide is one or more the mixture in sucrose, lactose and maltose.
Above-mentioned bromoacetic acid is 10.0% of natural disaccharide weight.
Above-mentioned diethanolamine is 5.0% of natural disaccharide weight.
Above-mentioned inhibitor is made up of by weight percentage following starting material: natural disaccharide: 60%, bromoacetic acid: 6%, diethanolamine: 3%, sodium hydroxide: 2%, diacetyl oxide: 0.3%, N-bromoacetamide 1%, Glacial acetic acid: 0.2%, and all the other are water.
Above-mentioned inhibitor is made up of by weight percentage following starting material: natural disaccharide: 70%, bromoacetic acid: 7%, diethanolamine: 3.5%, sodium hydroxide: 5%, diacetyl oxide: 0.5%, N-bromoacetamide 1.5%, Glacial acetic acid: 0.6%, and all the other are water.
Above-mentioned inhibitor is made up of by weight percentage following starting material: natural disaccharide: 50%, bromoacetic acid: 5%, diethanolamine: 2.5%, sodium hydroxide: 2%, diacetyl oxide: 0.1%, N-bromoacetamide 0.5%, Glacial acetic acid: 0.2%, and all the other are water.
The preparation method of above-mentioned inhibitor: add required water in closed reactor, start to stir, add the natural disaccharide of required 50% ~ 70% until after dissolving completely, pass into pure nitrogen gas to continue to stir 0.5h, when temperature of reaction kettle reaches 80 DEG C ~ 90 DEG C, successively evenly add the bromoacetic acid of required 5% ~ 7%, the sodium hydroxide of 2% ~ 5%, stirring reaction 1h, continue to be warming up to 120 DEG C ~ 125 DEG C, the diethanolamine of required 2.5% ~ 3.5% is evenly added with the 1h time, stirring reaction 1h, successively add the diacetyl oxide of required 0.1% ~ 0.5% again, the N-bromoacetamide of 0.5% ~ 1.5%, stirring reaction 3h, stopping is heated, pH value is adjusted to 8-9 by the Glacial acetic acid adding required 0.2% ~ 0.6%, after cooling, dry at 100 DEG C ~ 110 DEG C, pulverize, be i.e. obtained described drilling fluid modification disaccharide shale inhibitor.
Beneficial effect of the present invention: the present invention's raw material based on natural disaccharide have developed a kind of drilling fluid shale inhibitor, this shale inhibitor is water-soluble, compatibleness is good, effective suppression mud shale expansion, dispersion, fall block, collapse, maintain wellbore stability ability strong, lifeless matter toxicity, biodegradablely belong to environment-friendly type, the material cost adopted is low, preparation method and required equipment condition simple, easy to implement, can meet in long celebrating mass-producing wellbore construction process the requirement of drilling fluid shale inhibitor, significantly can reduce production cost again, simultaneously for research natural environmental-protective type drilling fluid and completion fluid provides technical support, economic benefit and social benefit good, be worthy of popularization very much.The present invention can be applicable to Ordos Basin Changqing oilfields conventional well, prospect pit, branch horizontal well, ultra-long horizontal well, gas storage well etc.; effective suppression shale hydration disperses, fall block caves in; improve the ability of drilling fluid stabilizing borehole, not only meet safety drilling demand but also be beneficial to environment protection.
Embodiment
Embodiment 1:
The invention provides a kind of drilling fluid modification disaccharide shale inhibitor and preparation method thereof, this inhibitor is made up of by weight percentage following starting material: natural disaccharide: 50% ~ 70%, bromoacetic acid: 5% ~ 7%, diethanolamine: 2.5% ~ 3.5%, sodium hydroxide: 2% ~ 5%, diacetyl oxide: 0.1% ~ 0.5%, N-bromoacetamide 0.5% ~ 1.5%, Glacial acetic acid: 0.2% ~ 0.6%, all the other are water.Wherein natural disaccharide is one or more the mixture in sucrose, lactose and maltose.
Under the prerequisite meeting above-mentioned configuration proportion, described bromoacetic acid can be taken as 10.0% of natural disaccharide weight.Described diethanolamine can be taken as 5.0% of natural disaccharide weight.
The preparation method of a kind of drilling fluid modification disaccharide shale inhibitor provided by the present invention, its concrete preparation method is: in closed reactor, add required water, start to stir, add the natural disaccharide of required 50% ~ 70% until after dissolving completely, pass into pure nitrogen gas to continue to stir 0.5h, when temperature of reaction kettle reaches 80 DEG C ~ 90 DEG C, successively evenly add the bromoacetic acid of required 5% ~ 7%, the sodium hydroxide of 2% ~ 5%, stirring reaction 1h, continue to be warming up to 120 DEG C ~ 125 DEG C, the diethanolamine of required 2.5% ~ 3.5% is evenly added with the 1h time, stirring reaction 1h, successively add the diacetyl oxide of required 0.1% ~ 0.5% again, the N-bromoacetamide of 0.5% ~ 1.5%, stirring reaction 3h, stopping is heated, pH value is adjusted to 8-9 by the Glacial acetic acid adding required 0.2% ~ 0.6%, after cooling, dry at 100 DEG C ~ 110 DEG C, pulverize, be i.e. obtained described drilling fluid modification disaccharide shale inhibitor.
Embodiment 2:
On the basis of embodiment 1, the proportioning of inhibitor provided by the present invention can be made up of by weight percentage following starting material: natural disaccharide: 60%, bromoacetic acid: 6%, diethanolamine: 3%, sodium hydroxide: 2%, diacetyl oxide: 0.3%, N-bromoacetamide 1%, Glacial acetic acid: 0.2%, all the other are water.Its preparation process is: preparation process adds appropriate water in strict accordance with reinforced order in closed reactor, start to stir, add natural disaccharide until after dissolving completely, pass into pure nitrogen gas to continue to stir 0.5h, when temperature of reaction kettle reaches 80 DEG C ~ 90 DEG C, slowly evenly successively add bromoacetic acid, sodium hydroxide, stirring reaction 1h, continue to be warming up to 120 DEG C ~ 125 DEG C, add diethanolamine (about 1h adds), stirring reaction 1h, successively add diacetyl oxide, N-bromoacetamide again, stirring reaction 3h, stops heating, and adds Glacial acetic acid and pH value is adjusted to 8-9.After cooling, dry at 100 DEG C ~ 110 DEG C, pulverize.The i.e. drilling fluid shale inhibitor of obtained the present embodiment.
One, the anti-collapse inhibition evaluation experimental of embodiment 2 modification disaccharide shale inhibitor
Test 1: the shale landwaste rate of recovery evaluation experimental of the shale inhibitor of embodiment 2
This test characterizes the power of the anti-collapse property inhibition of drilling fluid by the shale landwaste rate of recovery of testing drilling fluid, the shale inhibitor of embodiment 2 is mixed with the aqueous solution according to different dosage, add Changqing oilfields straight sieve group shale landwaste 50 grams respectively, then at five axle heating roller furnaces 100 DEG C, heat rolls 16 hours, the shale landwaste primary recovery of test drilling fluid, then the landwaste collected is put into tap water heat at five axle heating roller furnaces 100 DEG C and roll 16 hours, test shale landwaste secondary returning yield, simultaneously with the shale landwaste primary recovery of clear water, secondary returning yield contrasts.The results are shown in Table 1.
Table 1 shale landwaste rate of recovery data
As can be seen from Table 1, dosage is to 2%, the shale landwaste primary recovery of this shale inhibitor is up to 92.7%, the shale landwaste secondary returning yield of this shale inhibitor reaches 84.9%, still corner angle are clearly demarcated after inhibitor fully acts on for landwaste, not there is aquation, expand, the phenomenon of dispersion, confirm that this inhibitor can firmly adsorb, be coated on drilling cuttings surface, formed tough and tensile, fine and close high strength adsorption film, even if this film is once formation also remains intact under clear water effect, effectively prevent the contact of drilling cuttings clay mineral and water, prevent mud shale stratum aquation, dispersion, thus play restraining effect.The primary recovery reflection shale inhibitor chemistry inhibition of shale is strong and weak, the landwaste dispersiveness in clear water of secondary returning yield reflection after inhibitor soaks, and dispersiveness is less, and illustrate that the suppressed effect of shale is stronger, the borehole wall is naturally more stable.
Test 2: the shale linear expansivity evaluation experimental of the shale inhibitor of embodiment 2
In order to the anti-collapse rejection ability of shale inhibitor of further Evaluation operation example 2, this test adopts NP-01 type shale expansion tester to test the shale linear expansivity of the shale inhibitor of embodiment 2, the results are shown in Table 2.
Table 2 shale linear expansivity data
As can be seen from Table 2, dosage is to 2%, and the shale linear expansivity of this inhibitor only has 10.7%, and clear water reach 58.4%, show that inhibitor has very strong restraining effect really to the dispersion of shale landwaste, effectively can suppress hydration swelling, the dispersion of clay.According to Changqing oilfields stratum characteristic, according to stratum pulping weight situation, adding this shale inhibitor of 0.5-2% can effective formation damage, meets safety drilling requirement.
Test 2: the heat-resisting property evaluation of the shale inhibitor of embodiment 2
The shale inhibitor of embodiment 2 is mixed with 2% aqueous solution by this test, respectively at 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C testing the shale landwaste rate of recovery, the results are shown in Table 3.As can be seen from Table 3, this shale inhibitor Applicable temperature scope is≤130 DEG C.Under higher temperature more than 130 DEG C, easily there is biological degradation and saboteur's structure in this inhibitor, reduces, thus weaken the effect suppressing mud shale dispersion at the borehole wall or landwaste surface excess.
Table 3 temperature resistance testing data
Two, the properties of embodiment 2 modification disaccharide shale inhibitor
Table 4 modification disaccharide shale inhibitor performance perameter
As can be seen from table 1 ~ table 4, the performance index of the shale inhibitor of embodiment 2 all meet onsite application requirement, can pay rig-site utilization.
Three, the test in place situation of embodiment 2 modification disaccharide shale inhibitor and effect
Embodiment 2 modification disaccharide mud shale inhibitor Changqing oilfields horizontal well test in place apply 3 mouthfuls of wells (Soviet Union and Eastern Europe 27-30H2 well, Soviet Union's 48-19-68H2 well, continent 8-14H1 well), on-the-spot maintenance dosage 0.5-2.0%, mud shale landwaste neat appearance, corner angle are clearly demarcated, clearly can see the vestige that PDC drill teeth is gnawed out, show that this inhibitor effectively can suppress the aquation of mud shale, expansion, dispersion, for mud logging operation provides almost complete landwaste, be beneficial in the process of drilling and accurately grasp stratigraphic distribution situation.Mud shale well section without fall fast, without caving in, without undergauge phenomenon, making a trip unblocked, hole diameter rule, diameter enlargement ratio, within 15%, shows that this inhibitor can effectively suppress collapsing of mud shale, and the ability of maintenance wellbore stability is strong.
In the test of Soviet Union and Eastern Europe 27-30H2 well horizontal section, adopt the modification disaccharide shale inhibitor of embodiment 2 to improve drilling fluid inhibition, effectively reduce formation collapsed pressure, achieve with 1.25g/cm
3(density was all at 1.35g/cm in the past
3low density above) passes through safely 318m mud stone, test pit section makes a trip smooth and easy, electrical measurement is success once, the operation of lower completion tubular string is smooth, create this area and pass through safely the minimum drilling fluid density record of large section mud stone, lay a good foundation for creeping into safely and fast, average rate of penetration reaches 10.57m/h, creates this block average rate of penetration at that time and notes down the soonest.Testing ground sampling is through Lab-evaluation, and result is shale primary recovery is 92.3%, and secondary returning yield is 90.6%, reaches the test effect of expection.
After Soviet Union 48-19-68H2 well horizontal section bores and meets mud stone, first the modification disaccharide shale inhibitor of embodiment 2 is adopted to be suppressed, drill-through 6 sections of safety is total to 246m mud stone, wherein (3868-3888m greyish-green mud stone 20m) (4262-4298m grey Sandy Silt 76m) (4298-4310m, mud stone blackish green mud stone 12m, ) (4311-4361m grey black charcoal mudrock 50m) (4700-4714m greyish-green mud stone 14m) (4715-4825m red-brown mud stone 110m), due to wellbore stability, downhole safety, this well drilling period is 57.3 days, that comparatively originally designed shortens 8.9 days, full well average rate of penetration is 5.63m/h, 6.8% is improve than what estimate, realize drilling well and continue speed-raising.
In the 8-14H1 well straight well section drilling process of continent, by adding about 0.5% embodiment 2 modification disaccharide mud shale inhibitor, effectively inhibit mud shale stratum pulping, strictly drilling fluid density being controlled at 1.02g/cm
3below, the density because of stratum pulping is prevented after rising, to cause serious pressure reduction leakage to occur.Creep into this well lower curved section, owing to will improve drilling fluid density to maintain wellbore stability, the complicated frequent generation of leakage, has had a strong impact on safety drilling, this inhibitor dosage has been brought up to 1.0-2.0%, effectively reduces formation collapsed pressure, from 1.30g/cm
3reduce density to 1.22g/cm
3prevent the continuation of leakage to develop, achieve at 1.21-1.22g/cm
3(density was all at 1.30g/cm in the past
3above) low density safe landing enters window, drifting, electrical measurement, casing job smoothly, creates sub-continent block gas well horizontal well lower curved section and enters the minimum record of window drilling fluid density.
Embodiment 3: on the basis of embodiment 1, natural disaccharide: 70%, bromoacetic acid: 7%, diethanolamine: 3.5%, sodium hydroxide: 5%, diacetyl oxide: 0.5%, N-bromoacetamide 1.5%, Glacial acetic acid: 0.6%, all the other are water.In closed reactor, appropriate water is added in strict accordance with reinforced order, start to stir, add natural disaccharide until after dissolving completely, pass into pure nitrogen gas to continue to stir 0.5h, when temperature of reaction kettle reaches 80 DEG C ~ 90 DEG C, slowly evenly successively add bromoacetic acid, sodium hydroxide, stirring reaction 1h, continue to be warming up to 120 DEG C ~ 125 DEG C, add diethanolamine (about 1h adds), stirring reaction 1h, successively add diacetyl oxide, N-bromoacetamide again, stirring reaction 3h, stops heating, and adds Glacial acetic acid and pH value is adjusted to 8-9.After cooling, dry at 100 DEG C ~ 110 DEG C, pulverize.Namely obtained drilling fluid of the present invention is with using shale inhibitor.
Embodiment 4: on the basis of embodiment 1, natural disaccharide: 50%, bromoacetic acid: 5%, diethanolamine: 2.5%, sodium hydroxide: 2%, diacetyl oxide: 0.1%, N-bromoacetamide 0.5%, Glacial acetic acid: 0.2%, all the other are water.In closed reactor, appropriate water is added in strict accordance with reinforced order, start to stir, add natural disaccharide until after dissolving completely, pass into pure nitrogen gas to continue to stir 0.5h, when temperature of reaction kettle reaches 80 DEG C ~ 90 DEG C, slowly evenly successively add bromoacetic acid, sodium hydroxide, stirring reaction 1h, continue to be warming up to 120 DEG C ~ 125 DEG C, add diethanolamine (about 1h adds), stirring reaction 1h, successively add diacetyl oxide, N-bromoacetamide again, stirring reaction 3h, stops heating, and adds Glacial acetic acid and pH value is adjusted to 8-9.After cooling, dry at 100 DEG C ~ 110 DEG C, pulverize.Namely obtained drilling fluid of the present invention is with using shale inhibitor.
In embodiment 3, in the application of 4, modification disaccharide shale inhibitor equally effectively suppresses the pulping of mud shale stratum, falls block, caves in, and maintains wellbore stability ability strong, is very beneficial to safety drilling.
The part do not described in detail in present embodiment belongs to the known conventional means of the industry, does not describe one by one here.More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (8)
1. a drilling fluid modification disaccharide shale inhibitor, it is characterized in that, be made up of by weight percentage following starting material: natural disaccharide: 50% ~ 70%, bromoacetic acid: 5% ~ 7%, diethanolamine: 2.5% ~ 3.5%, sodium hydroxide: 2% ~ 5%, diacetyl oxide: 0.1% ~ 0.5%, N-bromoacetamide 0.5% ~ 1.5%, Glacial acetic acid: 0.2% ~ 0.6%, all the other are water.
2. a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, described natural disaccharide is one or more the mixture in sucrose, lactose and maltose.
3. a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, described bromoacetic acid is 10.0% of natural disaccharide weight.
4. a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, described diethanolamine is 5.0% of natural disaccharide weight.
5. a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, described inhibitor is made up of by weight percentage following starting material: natural disaccharide: 60%, bromoacetic acid: 6%, diethanolamine: 3%, sodium hydroxide: 2%, diacetyl oxide: 0.3%, N-bromoacetamide 1%, Glacial acetic acid: 0.2%, all the other are water.
6. a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, described inhibitor is made up of by weight percentage following starting material: natural disaccharide: 70%, bromoacetic acid: 7%, diethanolamine: 3.5%, sodium hydroxide: 5%, diacetyl oxide: 0.5%, N-bromoacetamide 1.5%, Glacial acetic acid: 0.6%, all the other are water.
7. a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, described inhibitor is made up of by weight percentage following starting material: natural disaccharide: 50%, bromoacetic acid: 5%, diethanolamine: 2.5%, sodium hydroxide: 2%, diacetyl oxide: 0.1%, N-bromoacetamide 0.5%, Glacial acetic acid: 0.2%, all the other are water.
8. the preparation method of a kind of drilling fluid modification disaccharide shale inhibitor as claimed in claim 1, it is characterized in that, required water is added in closed reactor, start to stir, add the natural disaccharide of required 50% ~ 70% until after dissolving completely, pass into pure nitrogen gas to continue to stir 0.5h, when temperature of reaction kettle reaches 80 DEG C ~ 90 DEG C, successively evenly add the bromoacetic acid of required 5% ~ 7%, the sodium hydroxide of 2% ~ 5%, stirring reaction 1h, continue to be warming up to 120 DEG C ~ 125 DEG C, the diethanolamine of required 2.5% ~ 3.5% is evenly added with the 1h time, stirring reaction 1h, successively add the diacetyl oxide of required 0.1% ~ 0.5% again, the N-bromoacetamide of 0.5% ~ 1.5%, stirring reaction 3h, stopping is heated, pH value is adjusted to 8-9 by the Glacial acetic acid adding required 0.2% ~ 0.6%, after cooling, dry at 100 DEG C ~ 110 DEG C, pulverize, be i.e. obtained described drilling fluid modification disaccharide shale inhibitor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111040745A (en) * | 2019-11-28 | 2020-04-21 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Naturally-degradable environment-friendly drilling fluid |
| CN111720087A (en) * | 2020-07-28 | 2020-09-29 | 中国石油天然气集团有限公司 | Drifting method for mudstone blockage at deviated well section and drifting drilling tool combination |
| CN111720087B (en) * | 2020-07-28 | 2024-05-31 | 中国石油天然气集团有限公司 | Well dredging method and well dredging drilling tool combination for inclined well section mudstone blocking |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111040745A (en) * | 2019-11-28 | 2020-04-21 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Naturally-degradable environment-friendly drilling fluid |
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| CN111720087A (en) * | 2020-07-28 | 2020-09-29 | 中国石油天然气集团有限公司 | Drifting method for mudstone blockage at deviated well section and drifting drilling tool combination |
| CN111720087B (en) * | 2020-07-28 | 2024-05-31 | 中国石油天然气集团有限公司 | Well dredging method and well dredging drilling tool combination for inclined well section mudstone blocking |
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| Publication number | Publication date |
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| CN105038731B (en) | 2017-10-03 |
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