CN108559462A - A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent - Google Patents
A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent Download PDFInfo
- Publication number
- CN108559462A CN108559462A CN201810047581.2A CN201810047581A CN108559462A CN 108559462 A CN108559462 A CN 108559462A CN 201810047581 A CN201810047581 A CN 201810047581A CN 108559462 A CN108559462 A CN 108559462A
- Authority
- CN
- China
- Prior art keywords
- drilling fluid
- microcrystalline cellulose
- fluid reservoir
- diverting agent
- oxalic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C09K8/035—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Detergent Compositions (AREA)
Abstract
The present invention relates to a kind of microcrystalline celluloses and preparation method thereof as drilling fluid reservoir protection diverting agent, belong to oil-gas resource exploration and development and natural macromolecular material preparation field.Microcrystalline cellulose of the present invention as drilling fluid reservoir protection diverting agent is the cellulose paste by 2wt%~12wt%; the oxalic acid dihydrate of 20wt%~42wt%; the high-valency metal salt of 0.25wt%~3.5wt%, surplus are that water reaction 3h~5h under 95 DEG C~100 DEG C and mechanical agitation is made.Product size is 20 μm~80 μm; has many advantages, such as nontoxic, unstressed configuration, environmental protection, at low cost; effective closure to oil and gas reservoir micropore and microcrack can be achieved; simultaneously; it is made due to the use of natural biologic material; it is voluntarily degraded after a period of time, it can be achieved that automatic unseal, to play the purpose of protection reservoir.
Description
Technical field
The present invention relates to oil-gas resource exploration and development and natural macromolecular material preparation field, in particular to
A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent.
Background technology
With the exploitation continuously and healthily of unconventional reservoir, reservoir protection becomes a technical barrier in drilling process.Drilling well
The a series of underground complexity such as well slough, undergauge, leakage may be faced in the process, and drilling liquid technology is related to drilling well success or failure, reservoir
The stratum that mostly hole or crack are more developed, drilling fluid of leaving in drilling process enter reservoir, are bound to cause reservoir damage, sternly
Ghost image rings later stage harvest efficiency.There are the solid phase particles such as barite, clay and polymer substance difficult to degrade in traditional drilling fluid,
It is very easy to that reservoir pore space or crack is caused to be blocked or blocked by polymer by barite, this increases negative to later stage reservoir reconstruction
Load.
No matter oil base drilling fluid or water-base drilling fluid, addition micro materials can block the microfissure in shale reservoir,
Contribute to Wellbore Stability caused by solving the leakage of shale microfissure, it is effective in drilling process to reservoir progress temporary plugging
Prevent to enter reservoir to reservoir harmful substance in drilling fluid and drilling fluid, after waiting for completion, sealing agent can voluntarily degrade or
By simply handling removing.Current container horizon protective agent, which has developed, detailed catalogue calcium carbonate, asphalitine, oil-soluble resin etc..But
All there are some weakness in these materials：Calcium carbonate is relatively stiff, blocks simultaneously imprecision to hole, still has more drilling fluid that can flow into
Reservoir, asphalitine or oil-soluble resin class product the problem of there are fluorescence and toxicity, well logging and environmental protection can be generated certain
It influences, and the deblocking of asphalitine or oil-soluble resin is relatively difficult.Drilling fluid with strong rejection capability and seal-off effect is to solve storage
The key of layer borehole well instability.Therefore, a kind of low Poison is developed, reservoir protection diverting agent that is nontoxic, can unsealing automatically has weight
Want meaning.
Invention content
The main purpose of the present invention is to provide a kind of microcrystalline celluloses as drilling fluid reservoir protection diverting agent, have and block
Ability is strong, nontoxic, unstressed configuration, environmental protection, low cost, high temperature resistance, salt resistance and the functions such as can voluntarily degrade.
It is a further object of the present invention to provide a kind of preparations of the microcrystalline cellulose as drilling fluid reservoir protection diverting agent
Method.
To achieve the above object, a kind of microcrystalline cellulose as drilling fluid reservoir protection diverting agent, by following quality point
Several each components are prepared：
Cellulose paste 2%~12%
Oxalic acid dihydrate 20%~42%
High-valency metal salt 0.25%~3.5%
Surplus is water,
The cellulose paste is bleached wood pulp, bleaching straw pulp, cotton pulp, dissolving pulp, secondary stock, does not float wood pulp or do not float
The mixture of one or more of straw pulp composition；
The high-valency metal salt be anhydrous ferric trichloride, ferric chloride (FeCl36H2O), anhydrous Aluminum chloride, six water alchlors,
The mixture of one or more of zinc chloride composition.
A kind of preparation method of the microcrystalline cellulose as drilling fluid reservoir protection diverting agent is catalyzed using high-valency metal salt
Oxalic acid hydrocellulose slurry methods be made, include the following steps：
(1) oxalic acid dihydrate is added in reactor under the conditions of 10 DEG C~30 DEG C, is then added water, stirring 5min~
Then high-valency metal salt is added in 10min, after stirring 5min, cellulose paste is then added, is warming up between 95 DEG C~100 DEG C,
Reaction temperature control persistently stirs 3h~5h between 95 DEG C~100 DEG C, then reaction solution without cooling directly in 2000r/
3min~10min is centrifuged under the rotating speed of min~6000r/min, obtains supernatant and precipitation two parts；
(2) vacuum distillation is carried out to the supernatant fraction being centrifugally separating to obtain in step (1) and removes 50%~80% moisture,
Then remaining supernatant heats 5min~10min under the conditions of 85 DEG C~95 DEG C, and 0.5h~1 is stood after being cooled to 0 DEG C~20 DEG C
H filters recycling oxalic acid dihydrate；
(3) sediment fraction being centrifugally separating to obtain in step (1) is first used and distills water-dispersed, the distilled water and precipitation of use
Volume ratio be 5: 1~10: 1, then under the rotating speed of 2000r/min~6000r/min centrifuge 3min~10min, this centrifugation
Washing at least 1 time, the precipitation after washing is through being further freeze-dried or being spray-dried and obtaining microcrystalline cellulose product.
Wherein, the stirring described in step (1) is mechanical agitation, and rotating speed is 100r/min~500r/min.
In step (3), the centrifuge washing at least 1 time, it is preferable that centrifuge washing 2~5 times.
The microcrystalline cellulose as drilling fluid reservoir protection diverting agent prepared through above-mentioned steps, size are 20 μm~80 μ
m。
Advantageous effect
1. the microcrystalline cellulose as drilling fluid reservoir protection diverting agent prepared by the present invention, nontoxic, unstressed configuration, environmental protection,
It is at low cost, it can be achieved that effective closure to hole and microcrack.It is made due to the use of natural biologic material, is passed through under reservoir environment
It is voluntarily degraded after a period of time, it can be achieved that deblocking.
2. the microcrystalline cellulose as drilling fluid reservoir protection diverting agent prepared by the present invention, temperature resistance reaches in drilling fluid
180 DEG C, salt tolerant reaches saturation.
3. the preparation method of the microcrystalline cellulose as drilling fluid reservoir protection diverting agent of the present invention, easy to operate, at
This is cheap, and hydrolyzate is Ke Xunhuanliyong, and means re-crystallization recycling can be used in oxalic acid, and environmental pollution is small.
Description of the drawings
Fig. 1 is to hydrolyze microcrystalline cellulose scanning electron microscope prepared by bleaching poplar slurry according to the Ferric Chloride oxalic acid of example 1
Picture.
Specific implementation mode
Following embodiment is enumerated only as the example of embodiment of the present invention, does not constitute any limit to the present invention
System, it will be appreciated by those skilled in the art that modification in the range of without departing from essence of the invention and design each falls within the present invention
Protection domain.
Embodiment 1：
75g oxalic acid dihydrates are added in three neck round bottom flask under the conditions of 20 DEG C, the water and 1g of 100g is then added
Ferric chloride (FeCl36H2O) after stirring 5min, is added the bleaching poplar slurry of 5g over dry, is warming up to 100 DEG C with oil bath, and maintain 100
Mechanical agitation 3h under the conditions of DEG C, mixing speed 300r/min.Then without cooling directly reaction solution is centrifuged, be arranged from
Scheming rotating speed is 3000r/min, and supernatant is moved out in round-bottomed flask by duration of runs 3min after centrifugation, and vacuum distillation removes
About 50g water is removed, then heats 5min under the conditions of 95 DEG C, then naturally cools to 20 DEG C, stands 1h, is filtered, filter cake natural wind
Dry recycling oxalic acid dihydrate.Above-mentioned centrifuged deposit part is water-dispersed with 200mL distillations, is then 3000r/ in centrifuge speed
Min and the duration of runs centrifuge under conditions of being 3min, remove supernatant, this washing process is carried out 3 times, then carried out to precipitation cold
Dry microcrystalline cellulose, as drilling fluid reservoir protection diverting agent is lyophilized.Yield is 91%, particle instrument analysis, 90% grain
Diameter is distributed between 25 μm~60 μm.
Embodiment 2：
35g oxalic acid dihydrates are added in three neck round bottom flask under the conditions of 20 DEG C, the water and 2g of 100g is then added
Ferric chloride (FeCl36H2O) after stirring 5min, is added the bleached spruce wood pulp of 10g over dry, is warming up to 95 DEG C with oil bath, and maintain 95
Mechanical agitation 5h under the conditions of DEG C, mixing speed 300r/min.Then without cooling directly reaction solution is centrifuged, be arranged from
Scheming rotating speed is 4000r/min, and supernatant is moved out in round-bottomed flask by duration of runs 3min after centrifugation, and vacuum distillation removes
About 50g water is removed, then heats 5min under the conditions of 95 DEG C, then naturally cools to 20 DEG C, stands 1h, is filtered, filter cake natural wind
It is dry, recycle oxalic acid dihydrate.Above-mentioned centrifuged deposit part is water-dispersed with 300mL distillations, is then 3000r/ in centrifuge speed
Min and the duration of runs centrifuge under conditions of being 3min, remove supernatant, this washing process is carried out 2 times, then carried out to precipitation cold
Dry microcrystalline cellulose, as drilling fluid reservoir protection diverting agent is lyophilized.Yield is 88%, particle instrument analysis, 90% grain
Diameter is distributed between 35 μm~70 μm.
Embodiment 3：
55g oxalic acid dihydrates are added in three neck round bottom flask under the conditions of 20 DEG C, the water and 2g of 100g is then added
Six water alchlors after stirring 5min, are added the bleached eucalyptus pulp of 10g over dry, are warming up to 95 DEG C with oil bath, and maintain 95
Mechanical agitation 4h under the conditions of DEG C, mixing speed 300r/min, then without cooling directly reaction solution is centrifuged, be arranged from
Scheming rotating speed is 4000r/min, and supernatant is moved out in round-bottomed flask by duration of runs 3min after centrifugation, and vacuum distillation removes
About 60g water is removed, then heats 5min under the conditions of 85 DEG C, then naturally cools to 10 DEG C, stands 1h, is filtered, filter cake natural wind
It is dry, recycle oxalic acid dihydrate.Above-mentioned centrifuged deposit part 300mL distillations are water-dispersed, are then 3000r/min in centrifuge speed
With the duration of runs to be centrifuged under conditions of 3min, supernatant is removed, this washing process is carried out 3 times, then freezed to precipitation
Dry microcrystalline cellulose, as drilling fluid reservoir protection diverting agent.Yield is 92%, particle instrument analysis, 90% grain size
It is distributed between 35 μm~65 μm.
Embodiment 4：
55g oxalic acid dihydrates are added in three neck round bottom flask under the conditions of 20 DEG C, the water and 1g of 100g is then added
Zinc chloride after stirring 5min, is added the maize straw slurry of 10g over dry, is warming up to 100 DEG C with oil bath, and maintain 100 DEG C of conditions
Lower mechanical agitation 5h, mixing speed 400r/min.Then directly reaction solution is centrifuged without cooling, centrifugal basket is set
Speed is 4000r/min, and supernatant is moved out in round-bottomed flask by duration of runs 3min after centrifugation, and vacuum distillation removes about 50g
Then water heats 5min under the conditions of 90 DEG C, then naturally cool to 20 DEG C, stands 1h, filters, filter cake natural air drying, recycling
Oxalic acid dihydrate.Above-mentioned centrifuged deposit part is water-dispersed with 300mL distillations, is then 3000r/min and fortune in centrifuge speed
Turn the time to be centrifuged under conditions of 3min, removes supernatant, this washing process carries out 3 times, then to precipitation 300mL distilled water
Dispersion, then carries out being spray-dried to obtain microcrystalline cellulose, as drilling fluid reservoir protection diverting agent.Yield is 85%, grain size
Instrument is analyzed, and 90% particle diameter distribution is between 50 μm~70 μm.
Embodiment 5：
55g oxalic acid dihydrates are added in three neck round bottom flask under the conditions of 25 DEG C, the water and 2g of 100g is then added
Ferric chloride (FeCl36H2O), after stirring 5min, 12g over dry is added does not bleach poplar slurry, is warming up to 100 DEG C with oil bath, and maintain
Mechanical agitation 5h under the conditions of 100 DEG C, mixing speed 400r/min.Then directly reaction solution is centrifuged without cooling, if
It is 4000r/min to set centrifuge speed, and supernatant is moved out in round-bottomed flask by duration of runs 3min after centrifugation, and decompression is steamed
About 40g water is removed in distillation, then heats 5min under the conditions of 95 DEG C, then naturally cools to 20 DEG C, stands 1h, filters, and filter cake is certainly
It so air-dries, recycles oxalic acid dihydrate.Above-mentioned centrifuged deposit part is water-dispersed with 400mL distillations, is then in centrifuge speed
3000r/min and the duration of runs centrifuge under conditions of being 3min, remove supernatant.This washing process carries out 3 times, then to precipitation
It carries out being freeze-dried to obtain microcrystalline cellulose, as drilling fluid reservoir protection diverting agent.Yield is 85%, particle instrument analysis,
90% particle diameter distribution is between 25 μm~45 μm.
Embodiment 6：
45g oxalic acid dihydrates are added in three neck round bottom flask under the conditions of 20 DEG C, the water and 1g of 100g is then added
Ferric chloride (FeCl36H2O) after stirring 5min, is added the bleaching poplar slurry of 15g over dry, is warming up to 100 DEG C with oil bath, and maintain
Mechanical agitation 5h under the conditions of 100 DEG C, mixing speed 400r/min.Then directly reaction solution is centrifuged without cooling, if
It is 4000r/min to set centrifuge speed, and supernatant is moved out in round-bottomed flask by duration of runs 3min after centrifugation, and decompression is steamed
About 40g water is removed in distillation, then heats 5min under the conditions of 90 DEG C, then naturally cools to 20 DEG C, stands 1h, filters, and filter cake is certainly
It so air-dries, recycles oxalic acid dihydrate.Above-mentioned centrifuged deposit part is water-dispersed with 500mL distillations, is then in centrifuge speed
3000r/min and the duration of runs centrifuge under conditions of being 3min, remove supernatant, this washing process carries out 3 times, and remainder is
For drilling fluid reservoir protection diverting agent humectant.Yield is 85%, solid content 31%, particle instrument analysis, 90%.
Claims (4)
1. a kind of microcrystalline cellulose as drilling fluid reservoir protection diverting agent, which is characterized in that by each of following mass fraction
Component is prepared：
Cellulose paste 2%~12%
Oxalic acid dihydrate 20%~42%
High-valency metal salt 0.25%~3.5%
Surplus is water,
The cellulose paste is bleached wood pulp, bleaching straw pulp, cotton pulp, dissolving pulp, secondary stock, does not float wood pulp or do not float straw pulp
One or more of composition mixture；The high-valency metal salt is anhydrous ferric trichloride, ferric chloride (FeCl36H2O), anhydrous chlorine
Change the mixture of one or more of aluminium, six water alchlors, zinc chloride composition.
2. a kind of preparation method of the microcrystalline cellulose as described in claim 1 as drilling fluid reservoir protection diverting agent,
It is characterized in that, the oxalic acid hydrocellulose slurry methods being catalyzed using high-valency metal salt are made, and are included the following steps：
(1) oxalic acid dihydrate is added in reactor under the conditions of 10 DEG C~30 DEG C, is then added water, stirring 5min~
Then high-valency metal salt is added in 10min, after stirring 5min, cellulose paste is then added, is warming up between 95 DEG C~100 DEG C,
Reaction temperature control persistently stirs 3h~5h between 95 DEG C~100 DEG C, then reaction solution without cooling directly in 2000r/min
3min~10min is centrifuged under the rotating speed of~6000r/min, obtains supernatant and precipitation two parts；
(2) vacuum distillation is carried out to the supernatant fraction being centrifugally separating to obtain in step (1) and removes 50%~80% moisture, then
Remaining supernatant heats 5min~10min under the conditions of 85 DEG C~95 DEG C, and 0.5h~1h is stood after being cooled to 0 DEG C~20 DEG C, takes out
Filter recycling oxalic acid dihydrate；
(3) sediment fraction being centrifugally separating to obtain in step (1) is first used and distills water-dispersed, the distilled water of use and the body of precipitation
Then product centrifuges 3min~10min, this centrifuge washing than being 5: 1~10: 1 under the rotating speed of 2000r/min~6000r/min
At least 1 time, the precipitation after washing is through being further freeze-dried or being spray-dried and obtaining microcrystalline cellulose product.
3. the preparation method of the microcrystalline cellulose according to claim 2 as drilling fluid reservoir protection diverting agent, special
Sign is that the stirring described in step (1) is mechanical agitation, and rotating speed is 100r/min~500r/min.
4. the preparation method of the microcrystalline cellulose according to claim 2 as drilling fluid reservoir protection diverting agent, special
Sign is, in step (3), the centrifuge washing at least 1 time, it is preferable that centrifuge washing 2~5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047581.2A CN108559462A (en) | 2018-01-17 | 2018-01-17 | A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047581.2A CN108559462A (en) | 2018-01-17 | 2018-01-17 | A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108559462A true CN108559462A (en) | 2018-09-21 |
Family
ID=63530862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810047581.2A Pending CN108559462A (en) | 2018-01-17 | 2018-01-17 | A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108559462A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564381A (en) * | 2019-09-28 | 2019-12-13 | 重庆威能钻井助剂有限公司 | Composite filtrate reducer for drilling fluid and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311243A (en) * | 2007-05-25 | 2008-11-26 | 绵阳市仁智实业发展有限责任公司 | Temporary blocking agent for hydrocarbon reservoir crack |
| CN105153316A (en) * | 2015-10-19 | 2015-12-16 | 中国科学院青岛生物能源与过程研究所 | Method for preparing nano cellulose by formic acid hydrolysis by using metal salt catalyst |
-
2018
- 2018-01-17 CN CN201810047581.2A patent/CN108559462A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311243A (en) * | 2007-05-25 | 2008-11-26 | 绵阳市仁智实业发展有限责任公司 | Temporary blocking agent for hydrocarbon reservoir crack |
| CN105153316A (en) * | 2015-10-19 | 2015-12-16 | 中国科学院青岛生物能源与过程研究所 | Method for preparing nano cellulose by formic acid hydrolysis by using metal salt catalyst |
Non-Patent Citations (4)
| Title |
|---|
| ROBIN VERRET等: "Use of Micronized Cellulose Fibers to Protect Producing Formations", 《SPE INTERNATIONAL SYMPOSIUM ON FORMATION DAMAGE CONTROL》 * |
| 刘波等: "国外保护油气层技术新进展-关于暂堵机理和方法研究", 《钻井液与完井液》 * |
| 崔懂礼: "微米级和纳米级纤维素纤维的制备和应用", 《国际造纸》 * |
| 王毅等: "纳米技术在钻井完井液中的应用前景", 《钻井液与完井液》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564381A (en) * | 2019-09-28 | 2019-12-13 | 重庆威能钻井助剂有限公司 | Composite filtrate reducer for drilling fluid and preparation method thereof |
| CN110564381B (en) * | 2019-09-28 | 2021-07-20 | 重庆威能钻井助剂有限公司 | Composite filtrate reducer for drilling fluid and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4040866A (en) | Laundering of oil base mud cuttings | |
| US7913776B2 (en) | Method and system to recover usable oil-based drilling muds from used and unacceptable oil-based drilling muds | |
| CN104178202A (en) | Technological method for extracting and separating oil sand | |
| CN104271212B (en) | For the method for reclaiming from permeability medium and/or remove reagent | |
| CN101168799A (en) | Extraction separation method for circularly preparing saponification organic phase rear earth from chloride solvent | |
| CN108559462A (en) | A kind of microcrystalline cellulose and preparation method thereof as drilling fluid reservoir protection diverting agent | |
| CN105968713B (en) | A kind of preparation method of copper-clad plate filler, copper-clad plate resin combination and copper-clad plate | |
| CN105668957A (en) | Oil field oil-containing sludge treatment process | |
| CN107599234B (en) | A kind of waste aluminium plastic separation recycling technique | |
| CN206168581U (en) | Pet grain centrifugal device | |
| CN105713521B (en) | A kind of rosin dry method melts and fat liquid net system method | |
| CN113105915B (en) | Method and system for efficiently recovering heavy wax and catalyst in Fischer-Tropsch synthesis slag wax | |
| CN107286986B (en) | A kind of process units and production method of lube base oil | |
| IE790999L (en) | Solvent extraction. | |
| CN107140797A (en) | Oil-based drill cuttings separation and recovery system and method | |
| CN106432794A (en) | Recovery process for polyurethane wastes | |
| JPH0638940B2 (en) | Method for recovering valuables from paint sludge | |
| CN106159371A (en) | Method for recovering waste slurry of lithium iron phosphate power battery | |
| CN106221791B (en) | A kind of base oil spent bleaching clay selectivity de-oiling method and its device | |
| WO2016049441A1 (en) | Method of extracting oil from oil-containing substance | |
| CN104801266A (en) | Novel process for harmless treatment of waste clay | |
| CN106977613A (en) | A kind of method that artemisia desertorum polysaccharide is extracted in the seed from sand sagebrush (Artemisia filifolia) | |
| CN204170855U (en) | A kind of food additives filtering centrifuge | |
| JPS62190090A (en) | Production of powdery natural pigment | |
| CN106431786B (en) | A kind of method for separating graphite and being granulated graphite in fine explosive powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180921 |
|
| WD01 | Invention patent application deemed withdrawn after publication |