CN107523281A - A kind of drilling fluid oil-base mud sealing agent - Google Patents
A kind of drilling fluid oil-base mud sealing agent Download PDFInfo
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- CN107523281A CN107523281A CN201710941784.1A CN201710941784A CN107523281A CN 107523281 A CN107523281 A CN 107523281A CN 201710941784 A CN201710941784 A CN 201710941784A CN 107523281 A CN107523281 A CN 107523281A
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- sealing agent
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- base mud
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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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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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
- 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
- C09K2208/08—Fiber-containing well treatment fluids
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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
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of drilling fluid oil-base mud sealing agent, the sealing agent uses mass percent as swellability fiber：30~35%；Packing material：10~15%；Bridging materials：20~35%；Swelling property resin：10~20%；Surfactant：10~15%；High molecular polymer：0.5~1% proportioning form, be a kind of more excellent compound sealing agent of new oil-base mud of more external oil base sealing agent properties of product, have the characteristics that easy to use, construction safety, to environment non-hazardous, plugging effect is obvious, economic value is high.
Description
Technical field
The present invention is a kind of drilling fluid oil-base mud sealing agent, and in particular to coordinates what drilling fluid was used with oil-base mud
Sealing agent, belong to petroleum industry bored material field.
Background technology
During the various underground work such as drilling well, well cementation, test or well workover, various working solutions flow in the presence of pressure difference
Enter stratum and cause leakage phenomenon, be most universal common technical barrier in drilling engineering, particularly present oil-base mud technology
Promote and use, such as run into leakage, caused loss and environmental disruption be it is immeasurable, for avoid leakage influence production capacity,
Cause down-hole accident, the sealing agent of oil-base mud type is researched and developed and use is extremely urgent.
Existing patent document CN105368409A（A kind of oil base drilling fluid compound sealing agent and preparation method thereof,
2016.03.02）Disclose it is a kind of by 20% ~ 50% loss circulation material, 0.5% ~ 2% fibrous material, 5% ~ 20% oil swell material, 20% ~
The oil base drilling fluid sealing agent of 40% lipophile ultra-fine grain material, 10% ~ 20% lipophile flaky material composition.The sealing agent
The leak-proof leak-stopping demand for meeting permeable formation and fractured leakage stratum is bored mainly for oil base drilling fluid system, is split for 5mm
Seam, compression strength can reach 7MPa；Depth of invasion reduced rate in casting bed evaluation test>90%.Oil base drilling fluid is remarkably improved to block up
Success rate is leaked, strengthens Formation bearing pressure.
Existing patent document CN106609127A（A kind of oil base drilling fluid loss circulation material and preparation method thereof,
2017.05.03）A kind of loss circulation material being made up of oil-soluble expanding material, modified fibre, walnut shell, calcium carbonate is disclosed, its
In the mass percent that respectively forms be：10% ~ 20% oil-soluble expanding material, 10% ~ 30% modified fibre, 30% ~ 50% walnut shell, 10
~ 30% calcium carbonate.The loss circulation material has good expansion character in oil, and can be good at being dispersed in oil base drilling fluid
In system, there is good shut-off capacity for≤5mm crack, its bearing strength is up to more than 7MPa.
Existing patent document CN105482784A（Oil base drilling fluid sealing agent, 2016.04.13）One kind is disclosed by 45.0
~ 60.0 parts of rigid loss circulation materials, 10.0 ~ 25.0 parts of complex fiber materials, 10.0 ~ 20.0 parts of oil suction intumescent materials, 10.0 ~
The sealing agent that 20.0 parts of oil-soluble plugging materials, 2.5 ~ 8.0 parts of water swellable materials, 0.5 ~ 2.5 part of surfactant form,
Its advantage is：It is good with oil base drilling fluid compatibility, adapt to 60 ~ 150 DEG C of formation temperature；And its dosage 1 ~ 5%, for block 10 ~
20 mesh quartz casting beds or 0.5mm microcracks stratum, plugging effect is good, and bearing capacity is more than 6.0MPa.
The content of the invention
It is an object of the invention to provide a kind of drilling fluid oil-base mud sealing agent, using swellability fiber, swellability
The materials such as resin, surfactant, high molecular polymer match in proportion to be formed, and is a kind of more external oil base sealing agent product
The more excellent compound sealing agent of new oil-base mud of energy, there is easy to use, construction safety, to environment non-hazardous, leak stopping
The features such as positive effect, high economic value.
The present invention is achieved through the following technical solutions：A kind of drilling fluid oil-base mud sealing agent, by mass percentage,
The sealing agent includes following component：
Swellability fiber：30~35%；Packing material：10~15%；
Bridging materials：20~35%；Swelling property resin：10~20%；
Surfactant：10~15%；High molecular polymer：0.5~1%.
The swellability fiber is made after being crushed using cotton seed hulls or oil cake through modified, during actual use, after crushing
Cottonseed by saponification, acidifying obtain the fiber dust of fatty acids, so as to add oleophylic ability, make it in oil-base mud
It is more easy to be swelled, the more existing modified fibre obtained by base extraction, shows good lipophile, in oil-base mud easily
In stirring, easily make filter cake finer and close after swelling.
The packing material includes one or more combinations in vermiculite power, silica flour, montmorillonite powder, agstone.
The bridging materials include one or more combinations in maize cob meal, paper scrap, carbon fiber, powder of straw.
Preferably, it is 10~20 that the bridging materials, which are selected from mass ratio,：10~15 maize cob meal and paper scrap, or selected from matter
Amount is than being 10~20：10~15 maize cob meal and powder of straw.
The swelling property resin uses improved plant resin, and generally use formaldehyde, the condensation polymer of phenol synthesize instead with rosin
Ying Hou, then formed with glycerine esterification, coordinate swellability fiber, bridging materials to use, in oil base leakage-stop liquid after expansion
Play wad act.
The surfactant uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate
Deng it is swollen to have the function that suspending helps.
The high molecular polymer is using the polymer of acrylic acid and acrylamide, and in belonging to, low molecular weight substance, it is led
It is the hardness that packing material, bridging materials absorption, the effect assembled are increased to its mud cake to act on.
The present invention compared with prior art, has advantages below and beneficial effect：
（1）The present invention is applied to the leakage that oil base drilling fluid drilling well is run into, particularly to crackle（1~5mm of crack, leakage
Speed is 6~8m3/h）Property leakage plugging effect be particularly effective.
（2）The present invention is especially suitable for bore hole Scheme of Strengthening, from partial loss to severe leakage leak stopping, bore hole leak stopping or pre-
Processing, improve formation strength, well-case perforating leak stopping or casing leakage leak stopping at casing shoe.Blocking method is using needed for the preparation of ground
The pons hematoma slurry of concentration, is pumped directly into drop ply well section, and after acting drilling tool to safe well section, closing well, which is sprained, presses marquis to block up, after leak stopping, leakage
The success rate that struggles against is up to 100%.
（3）The present invention is easy to use, and the required diesel oil for preparing leak stopping slurry corresponding volume is added in vacant slurry tank（In vain
Oil）Afterwards, 10% sealing agent of the present invention is added by aggravating pump, stirred 0.5~1 hour, added a certain amount of heavy weight additive and adjust
Whole to corresponding well pulp density, stirring is pumped into well after 0.5~1 hour, and is replaced with oil-base mud to drop ply well section, is stopped
Pump up be drilled into safe well section wait it is stifled.
（4）Construction safety of the present invention, have and prepare convenient and swift, uniform, be not in agglomerating caking phenomenon and will not
Cause pipeline block pump of spraining hurt sb.'s feelings situation the characteristics of, during actual use, after slurries that sealing agent is prepared are pumped into drop ply well section, safety
Time is grown, and is not in that concentration is deposited in around drilling tool, will not cause the situation of bit freezing, meanwhile, bore bridging plug after leak stopping success
When, its drillability is high.
（5）The present invention is to environment non-hazardous, and its main raw material(s) is fiber, swollen resin and polymer etc., in oil base mud
Also the change of property will not occur after being acted in slurry, the harm to human body and environment will not be more caused, from oil-base mud after leak stopping
In the sealing agent that sifts out human body and environment will not be damaged and polluted.
（6）Plugging effect of the present invention is obvious, and leak stopping success rate is high, and plugging effect is better, using the sealing agent leak stopping into
Power can reach 100%.
（7）Cost economy of the present invention, each component raw material are purchased, prepared at home, and cost is far below similar imported product,
The cost for preparing every 1 ton of sealing agent is can be controlled within 100,000 yuan/ton, has good economic value.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 35%, packing material 15%, bridging materials 20%, swelling property resin 15%, surfactant 14%, polyphosphazene polymer
Compound 1%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 150 mesh, through potassium hydroxide
The fiber dust of the fatty acids obtained after saponification, hydrochloric acid acidifying；Packing material is by vermiculite power, silica flour, montmorillonite powder, lime
Stone flour forms；Bridging materials are made up of maize cob meal, paper scrap, carbon fiber, powder of straw；Swelling property resin is using formaldehyde, phenol
After condensation polymer and rosin synthetic reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Surface
Activating agent uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer is adopted
With acrylic acid and the polymer of acrylamide, the molecular weight of the polymer is 180~2,000,000.
Embodiment 2：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 30%, packing material 10%, bridging materials 35%, swelling property resin 14.5%, surfactant 10%, macromolecule
Polymer 0.5%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 200 mesh, through hydrogen-oxygen
Change the fiber dust of the fatty acids obtained after potash soap, hydrochloric acid acidifying；Packing material is by vermiculite power, silica flour and agstone
Composition；Bridging materials are made up of maize cob meal, paper scrap and powder of straw；Swelling property resin is using formaldehyde, the condensation polymer of phenol and pine
After fragrant synthetic reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Surfactant uses
Stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer using acrylic acid with
The polymer of acrylamide, the molecular weight of the polymer is 250~3,000,000.
Embodiment 3：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 32.2%, packing material 12%, bridging materials 30%, swelling property resin 10%, surfactant 15%, macromolecule
Polymer 0.8%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 180 mesh, through hydrogen-oxygen
Change the fiber dust of the fatty acids obtained after potash soap, hydrochloric acid acidifying；Packing material is by vermiculite power, silica flour and montmorillonite powder
Composition；Bridging materials are made up of maize cob meal and carbon fiber；Swelling property resin is synthesized using formaldehyde, the condensation polymer of phenol with rosin
After reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Surfactant uses stearic acid
Salt, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer uses acrylic acid and acryloyl
The polymer of amine, the molecular weight of the polymer is 450~5,000,000.
Embodiment 4：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 31.5%, vermiculite power 10%, maize cob meal 10%, paper scrap 15%, swelling property resin 20%, surfactant 13%,
High molecular polymer 0.5%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 200 mesh,
The fiber dust of the fatty acids obtained after potassium hydroxide saponification, hydrochloric acid acidifying；Swelling property resin uses the contracting of formaldehyde, phenol
After polymers and rosin synthetic reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Live on surface
Property agent uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer uses
The polymer of acrylic acid and acrylamide, the molecular weight of the polymer is 750~8,000,000.
Embodiment 5：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 32%, vermiculite power 15%, maize cob meal 20%, paper scrap 10%, swelling property resin 12%, surfactant 10%, height
Molecularly Imprinted Polymer 1%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 250 mesh, through hydrogen
The fiber dust of the fatty acids obtained after potassium oxide saponification, hydrochloric acid acidifying；Swelling property resin is using formaldehyde, the condensation polymer of phenol
After rosin synthetic reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Surfactant
Using stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer uses propylene
The polymer of acid and acrylamide, the molecular weight of the polymer is 10,000,000.
Embodiment 6：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 30%, vermiculite power 13%, maize cob meal 15%, powder of straw 10%, swelling property resin 20%, surfactant 11%,
High molecular polymer 1%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 280 mesh, warp
The fiber dust of the fatty acids obtained after potassium hydroxide saponification, hydrochloric acid acidifying；Swelling property resin uses the polycondensation of formaldehyde, phenol
After thing and rosin synthetic reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Surface-active
Agent uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer uses third
The polymer of olefin(e) acid and acrylamide, the molecular weight of the polymer is 12,000,000.
Embodiment 7：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 32%, vermiculite power 10.5%, maize cob meal 12%, powder of straw 15%, swelling property resin 16%, surfactant
14%th, high molecular polymer 0.5%.In above-mentioned component, swellability fiber is to use cotton seed hulls or oil cake to be ground into particle diameter as 300 mesh
Afterwards, the fiber dust of the fatty acids obtained after potassium hydroxide saponification, hydrochloric acid acidifying；Swelling property resin is using formaldehyde, phenol
Condensation polymer and rosin synthetic reaction after, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Table
Face activating agent uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer
Using acrylic acid and the polymer of acrylamide, the molecular weight of the polymer is 15,000,000.
Embodiment 8：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 31.3%, vermiculite power 11%, maize cob meal 16%, paper scrap 14%, swelling property resin 12%, surfactant 15%,
High molecular polymer 0.7%.In above-mentioned component, swellability fiber is to use cotton seed hulls or after oil cake is ground into particle diameter as 350 mesh,
The fiber dust of the fatty acids obtained after potassium hydroxide saponification, hydrochloric acid acidifying；Swelling property resin uses the contracting of formaldehyde, phenol
After polymers and rosin synthetic reaction, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Live on surface
Property agent uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer uses
The polymer of acrylic acid and acrylamide, the molecular weight of the polymer is 20,000,000.
Embodiment 9：
The present embodiment proposes a kind of drilling fluid oil-base mud sealing agent, and the sealing agent includes the group of following mass percent
Part：Swellability fiber 30%, vermiculite power 12.4%, maize cob meal 16%, powder of straw 13%, swelling property resin 14%, surfactant
14%th, high molecular polymer 0.6%.In above-mentioned component, swellability fiber is to use cotton seed hulls or oil cake to be ground into particle diameter as 400 mesh
Afterwards, the fiber dust of the fatty acids obtained after potassium hydroxide saponification, hydrochloric acid acidifying；Swelling property resin is using formaldehyde, phenol
Condensation polymer and rosin synthetic reaction after, then the improved plant resin formed with glycerine esterification, such as modified rosin resin；Table
Face activating agent uses stearate, such as：Octadecenic acid, calcium stearate, barium stearate, aluminum stearate etc.；High molecular polymer
Using acrylic acid and the polymer of acrylamide, the molecular weight of the polymer is 25,000,000.
Using described in embodiment 1-9 sealing agent prepare leak stopping by when, in vacant slurry tank add needed for prepare leak stopping
Starch the diesel oil of corresponding volume（White oil）Afterwards, the sealing agent for adding 10% by aggravating pump, stirs 0.5 ~ 1 hour, adds a certain amount of
Heavy weight additive adjust to corresponding well pulp density, stirring is pumped into well after 0.5 ~ 1 hour, and is replaced with oil-base mud to leakage
Layer well section, it is stifled that termination of pumping is drilled into escape pit section time.
By sealing agent, import sealing agent described in above-described embodiment 1-9（Sealing agent name of product FORM-A-BLOK）Respectively with
Diesel oil, barite prepare 10 parts of leak stopping slurries, and determine its API dehydration by national standard, and its data comparison is as shown in table 1, table 2.
Table 1
Table 2
Note：Influence factor is realized to reduce, oil gas still persistently presses to 2 minutes after spraying.
Contrasted from above-mentioned experimental data, the drilling fluid that the present embodiment 1-9 is related to oil-base mud sealing agent and import
Sealing agent is under the equal experiment condition of equal dosage, and the performance indications such as its leak-off time, filter loss, cake thickness are with respect to one
Cause, its cost is only the 50% of import sealing agent.
Embodiment 10：
The present embodiment is related to sealing agent described in embodiment 9 in Sichuan Yibin Gongxian County shale gas horizontal well（YS108 H5-2 wells）'s
Using：
YS108H5-2 wells are after well depth 2560m completes air drilling（The 〞 of bit size 81/2）, replace and crept into oil-base mud,
, due to underground falling blocks increase, there is moment of torsion increase, the situation for stalling disk of spraining, in the case starched well to well depth 2609m in drilling
Density has been alleviated by 1.95 ↗ 1.98, underground situation, occurs moment of torsion increase again in well depth 2630m, sprain stalling disk when, by well
Pulp density is by the g/cm of 1.98 ↗ 2.003, underground recovers normal, substantially steady without chip off-falling, moment of torsion.Creep into well 2686m and well occurs
Leakage（Well pulp density 2.00g/cm3）, discharge capacity 32L/S, 23.5Mpa is pumped, leaks fast 8.6m3/ h, 7:The last 20 is drilled into well depth 2692m, leakage
Speed increases to 16.8 m3/ h, drop discharge capacity to 21L/S, 11.5Mpa is pumped, leaks fast 8m3/ h,
Following leaking-stopping measure is taken after generation leakage：1. add drill-feeding plugging agent in drilling；2. drill-feeding plugging agent+bridge slurry is specially stifled；
3. bridge starches leak stopping；4.Foym-A-BLOK bridges starch leak stopping；5. bridge starches the non-leak stopping success of the methods of leak stopping.In the case, use
R-Y09（Sealing agent i.e. described in embodiment 9）Bridge slurry is coordinated to carry out plugging operations, its condition of construction is：
Under be drilled into after shaft bottom circulates clean shaft bottom sand, act being drilled into 2670m and be pumped into 10% concentration R-Y09 bridges slurry 20m3, for inside and outside flat
After rise be drilled into bridge slurry face closing well build the pressure, squeeze into R-Y09 bridges slurry 12.5m3, the ↗ 4Mpa of casing pressure 0, closing well builds the pressure 4 hours, the ↘ of casing pressure 4
3.4Mpa, pressure release are returned and tell 0.7m3, driven a well circulation, and discharge capacity 27L/S circulations are not leaked.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (8)
- A kind of 1. drilling fluid oil-base mud sealing agent, it is characterised in that：By mass percentage, the sealing agent includes following Component：Swellability fiber：30~35%；Packing material：10~15%；Bridging materials：20~35%；Swelling property resin：10~20%；Surfactant：10~15%；High molecular polymer：0.5~1%.
- A kind of 2. drilling fluid oil-base mud sealing agent according to claim 1, it is characterised in that：The swellability fiber It is made after being crushed using cotton seed hulls or oil cake through modified.
- A kind of 3. drilling fluid oil-base mud sealing agent according to claim 1, it is characterised in that：The packing material bag Include one or more combinations in vermiculite power, silica flour, montmorillonite powder, agstone.
- A kind of 4. drilling fluid oil-base mud sealing agent according to claim 1, it is characterised in that：The bridging materials bag Include one or more combinations in maize cob meal, paper scrap, carbon fiber, powder of straw.
- A kind of 5. drilling fluid oil-base mud sealing agent according to claim 4, it is characterised in that：The bridging materials choosing It is 10~20 from mass ratio：10~15 maize cob meal and paper scrap, or selected from mass ratio be 10~20：10~15 maize cob meal And powder of straw.
- A kind of 6. drilling fluid oil-base mud sealing agent according to claim 1, it is characterised in that：The swelling property resin Using improved plant resin.
- A kind of 7. drilling fluid oil-base mud sealing agent according to claim 1, it is characterised in that：The surfactant Using stearate.
- A kind of 8. drilling fluid oil-base mud sealing agent according to claim 1, it is characterised in that：The high molecular polymerization Thing is using acrylic acid and the polymer of acrylamide.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109135698A (en) * | 2018-10-13 | 2019-01-04 | 中石化石油工程技术服务有限公司 | A kind of oil base sealing agent and preparation method thereof |
| CN110671069A (en) * | 2018-07-03 | 2020-01-10 | 中国石油化工股份有限公司 | Method for suspending and erecting sand bridge in oil-water well casing and leakage repairing method |
| 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 |
| CN113248183A (en) * | 2021-06-22 | 2021-08-13 | 山东孟友新材料科技有限责任公司 | Plugging agent prepared from glass slag and preparation method and application thereof |
| CN115746197A (en) * | 2021-09-02 | 2023-03-07 | 中石化石油工程技术服务有限公司 | Double-crosslinked polymer microsphere plugging agent for oil-based drilling fluid and preparation method thereof |
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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 |
| CN111040745B (en) * | 2019-11-28 | 2022-08-12 | 中国石油天然气集团有限公司 | Natural degradation environment-friendly drilling fluid |
| CN113248183A (en) * | 2021-06-22 | 2021-08-13 | 山东孟友新材料科技有限责任公司 | Plugging agent prepared from glass slag and preparation method and application thereof |
| CN113248183B (en) * | 2021-06-22 | 2022-07-15 | 山东孟友新材料科技有限责任公司 | Plugging agent prepared from glass slag and preparation method and application thereof |
| CN115746197A (en) * | 2021-09-02 | 2023-03-07 | 中石化石油工程技术服务有限公司 | Double-crosslinked polymer microsphere plugging agent for oil-based drilling fluid and preparation method thereof |
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