CN205461191U - Oil field is with modified fiber ball filter - Google Patents
Oil field is with modified fiber ball filter Download PDFInfo
- Publication number
- CN205461191U CN205461191U CN201521006563.8U CN201521006563U CN205461191U CN 205461191 U CN205461191 U CN 205461191U CN 201521006563 U CN201521006563 U CN 201521006563U CN 205461191 U CN205461191 U CN 205461191U
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- CN
- China
- Prior art keywords
- filter
- filtrate
- rotary shaft
- oil field
- housing
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an oil field is with modified fiber ball filter, including the casing, main shaft and elevating gear, the both sides of casing top are equipped with the filtrating import, and the one side at casing middle part is equipped with that it packs to filter imports and exports, and the opposite side at middle part is equipped with an observation hole, and the both sides of casing lower part are equipped with the filtrate (liquid, the centre on casing upper portion still is equipped with an elevating gear controller, and the centre of lower extreme is equipped with an agitator, be equipped with a baffle on the main shaft, filtrating import with the filtrate (liquid is equipped with an electronic valve respectively, filtrating import department is equipped with one respectively and washs the water inlet, also be equipped with an electronic valve in wasing the water inlet, external connection no. 1 washs the water pump. Setting belt cleaning device and filter to an organic whole, reducing the transport and the setting of corresponding device, simultaneously, still provide the self - cleaning control system that an oil field is with modified fiber ball filter used, it is automatic to make the filter realize, the self - cleaning effect is showing, saves time, laborsaving, make the filter can adapt to production need, the work efficiency of improvement filter.
Description
Technical field
This utility model relates to polishing filter technical field, particularly to a kind of oil field modified fiber ball filter and
Its automatic cleaning control system.
Background technology
Oil field at home filter mainly has quartz filter, walnut shell filter, fiber ball filter and lacks at present
Amount fiber bundle filter.Wherein quartz filter be a kind of use quartz sand as the filter of filler, although it had
Filtration resistance power is little, and specific surface area is big, and resistance to acids and bases is strong, the advantages such as resistance tocrocking is good, but it is the highest to sewage disposal precision, difficult
To reach water injection in low-permeability oilfield water quality index requirement；Walnut shell filter is with walnut shell as filter medium, due to this work
Walnut shell for filter medium entered special handling, so it is big to have surface area, and high adsorption capacity, the advantage that clearance is high,
But it there is also the highest to sewage disposal precision and is difficult to reach the problem that water injection in low-permeability oilfield water quality index requires；Fiber
Ball filter is a kind of filter using fiber-ball filter media, and the fiber of this fibrous nodules is by through new chemical formulation synthesis
Special fibre silk make, its be mainly characterized by through essence modification fiber filtering is changed into hydrophilic by lipophilic
Type, the most several up to tens microns microns of filtrate diameter, there is specific surface area big, the advantages such as filtration resistance is little, the most also solve
The filtering accuracy of particulate filter is by problems such as particle diameter of filter medium are limited.It it is the granular filter material filter plant such as quartz sand and walnut shell
Renewal product.
But existing fiber ball filter also exists several defect, first, in filter filter process, owing to filtering
The filter plate arranged below filler, with hole slot structure, is understood some unavoidably and is not filtered or filter clean dirt the most completely
Water directly flows directly out outside device by filter plate, causes the oil-field flooding obtained of low quality so that water filling increasingly can not meet
Required.Nowadays, in fibre-ball filtration filler used, although device filter effect is fine, existing filter is all without automatically
Cleaning function, is required for manual cleaning, and automaticity is low.
Utility model content
Goal of the invention of the present utility model is: for the problem of above-mentioned existence, it is provided that a kind of oil field modified fiber ball
Filter, is arranged to one by cleaning device and filter, reduces carrying and the setting of related device, meanwhile, makes filter real
Existing automatization, automatic cleaning performance is notable, saves time, laborsaving, makes filter adapt to produce needs, and the work improving filter is imitated
Rate.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is as follows: a kind of oil field modified fiber ball filters
Device, including housing, main shaft and lowering or hoisting gear, the both sides above described housing are provided with filtrate import, and the side of housing central section is provided with
Filter packing is imported and exported, and the opposite side at middle part is provided with an observation port, and the both sides of lower housing portion are provided with filtrate (liquid, on described housing
The centre in portion is additionally provided with a lowering or hoisting gear controller, and the centre of lower end is provided with an agitator, and described main shaft is provided with a baffle plate, institute
Stating filtrate import and described filtrate (liquid is respectively equipped with an electronic valve, described filtrate import department is respectively equipped with a rinse water and enters
Mouthful, it also is provided with an electronic valve, external connection one flushing water pump in described rinse water import.
Further, described main shaft and described baffle plate are placed in described housing, and the lower section of described baffle plate is provided with filter packing, institute
The lower section stating filter packing is provided with filtering baffle, and the lower section of described filtering baffle is provided with a rotary shaft, the upper end of described rotary shaft
Being provided with impeller, rotary shaft is through the centre of described filtering baffle, and is deep in described filter packing, and described impeller fixedly mounts
In the upper end of described rotary shaft and be deep into together with rotary shaft in described filter packing, the lower end of described rotary shaft is through described
The lower end of housing is connected with described agitator, and described agitator is in transmission connection described rotary shaft.
Further, in the middle of described filtering baffle, it is provided with a mounting groove, above filtering baffle, is additionally provided with several unidirectional water inflows
Hole, described rotary shaft is connected by described mounting groove and described filtering baffle are fixing.
Further, the top in described unidirectional water inflow hole is provided with sealing shroud, is provided with valve in described sealing shroud, and sealing shroud is placed in
In described unidirectional water inflow hole, described valve is two half moon thin slices, and toward each other, root is connected with sealing shroud inwall, lobe
The free edge of film is towards the lower section in described unidirectional water inflow hole.
Further, described lowering or hoisting gear is a hydraulic lift, and it includes outfan, oil pump and electromagnetic valve, described defeated
Go out to hold be connected fixing with described main shaft, the fuel delivery of described electromagnetic valve control oil pump.
This utility model also includes a kind of automatic cleaning control system for oil field modified fiber ball filter, its bag
Include concentration detection module, pressure sensitive module, pressure detecting module, alarm module, lowering or hoisting gear driving module, stirrer-driven
Module, flow monitoring module, PLC and fine setting module, described concentration detection module is the concentration C of rinse water in detecting housing,
And be converted to concentration digital signal and be transferred to PLC；Described pressure sensitive module is for detecting the position S of baffle plate, and is converted to pressure
Power sensing digital signal is transferred to PLC；Described pressure detecting module is for detecting the pressure P of filtering baffle, and is converted to pressure
Digital signal is transferred to PLC；Flow monitoring module is for detecting in housing the flow Q at filtrate (liquid；
Concentration detection module is set, the concentration of the rinse water in housing can be detected, according to the difference of concentration, dense
Spend the denseest, cleaning the most thorough, can check whether filter packing cleans up, it is possible to determine whether cleaning process completes；
Pressure sensitive module is set, can verify whether baffle plate resets；Pressure detecting module is set, is possible to prevent baffle plate to filter in filter pressing
During filler, damage filtering baffle by pressure；Alarm module is set, cleaning process can be detected the most successful, if unsuccessful, then show to filter
Filler can not re-use, and prompting needs more to renew filler；Arrange lowering or hoisting gear drive module, can control lowering or hoisting gear up under
Row motion, and then drive the motion of baffle plate upstream and downstream, it is achieved pressure-filtering process；Stirrer-driven module is set, stirring can be driven
Device motion or stopping.
PLC receives each digital signal, when PLC starts, to fine setting module transmission original execution signal 000 with to lowering or hoisting gear
Module is driven to transmit initial signal 100, when receiving concentration signal C1, if C1 ＞ setting value C0, then dense to fine setting module transmission
Degree perform signal 001 and to stirrer-driven module transmission drive perform signal 011, afterwards the every 5min of concentration detection module to
PLC sends concentration signal C1, C2, C3 ... CN, PLC store signal C1, C2, C3 ... CN, and every five groups of signals calculate one
Meansigma methods c1, c2, c3 ... cn is as cn-1=cn and cn-2, during cn-1, cn ＞ setting value c0, then dense to fine setting module transmission
Degree performs signal 002, drives module transmission to drive to lowering or hoisting gear simultaneously and performs signal 012 and transmit to stirrer-driven module
Drive and perform signal 022；Work as cn-2, during cn-1, cn ＜ setting value c0, then report to the police to alarm module transmission and perform signal 003；When
During S ＞ setting value S1, then module transmission pressure sensitive is driven to perform signal 004 to lowering or hoisting gear；As setting value P1 ＜ P, then
Module transmission pressure detecting is driven to perform signal 005 to lowering or hoisting gear；The every 5min of flow monitoring module sends flow signal to PLC
Q1, Q2, Q3 ... QN, PLC store signal Q1, Q2, Q3 ... QN, and make calculating, as QN ＜ QN-1, then to fine setting mould
Block transmission flow detection performs signal 006 and drives module transmission reset signal 007 to lowering or hoisting gear；
Described fine setting module, including the opening and closing electronic valve being located at rinse water import and filtrate (liquid, at the beginning of being used for receiving
Beginning signal 000, and control the electronic valve closedown of electronic valve unlatching, filtrate import and the filtrate (liquid of rinse water import；With
Perform signal 001 in receiving concentration, and the electronic valve controlling rinse water import is closed；Signal 002 is performed for receiving concentration,
And control the electronic valve unlatching of filtrate (liquid；Perform signal 006 for receiving flow detection, and control the electronics of filtrate (liquid
The electronic valve of valve closing and control filtrate import is opened；
Described alarm module is located at the alarm on housing, is used for receiving warning and performs signal 004, and controls alarm report
Alert；Described lowering or hoisting gear drives module to include lowering or hoisting gear controller, is used for receiving initial signal 100, and controls lowering or hoisting gear
Up；Perform signal 004 for receiving pressure sensitive, and control lowering or hoisting gear stop motion；Signal is performed for receiving driving
012, and it is descending to control lowering or hoisting gear；Perform signal 005 for receiving pressure detecting, and control lowering or hoisting gear stop motion；With
In receiving reset signal 007, and it is up to control lowering or hoisting gear；Described stirrer-driven module includes the relay being located in agitator
Device, is used for receiving driving and performs signal 011, and control agitator motion；Perform signal 022 for receiving driving, and control to stir
Mix device stop motion.
Further, described fine setting module includes being located at filtrate import, filtrate (liquid and the electronic valve of rinse water import department,
Described lowering or hoisting gear drives module to include lowering or hoisting gear controller, is provided with multiple relay, institute in described lowering or hoisting gear controller
State multiple relay and jointly coordinate the oil pump supercharging controlled in lowering or hoisting gear or electromagnetic valve opening and closing；Described stirrer-driven module
The relay being located in agitator, controls rotary shaft and rotates or stop motion；Described concentration detection module is located on housing, position
Locate above filter packing and between baffle plate, the concentration of rinse water in detecting filter packing；Described pressure sensitive mould
Block is pressure inductor, is located on housing, and position is positioned at above baffle plate, for detecting the position of baffle plate；Described pressure detecting mould
Block is pressure transducer, is located on filtering baffle, for detecting the pressure of filtering baffle；Described alarm module is provided with warning
Device, described alarm module receives alarm signal, starts alarm；Described flow monitoring module is a flow monitoring meter, is located at filter
Liquid exit.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are: will clean device and mistake
Filter is arranged to one, reduces carrying and the setting of related device, meanwhile, makes filter realize automatization, automatic cleaning performance
Significantly, save time, laborsaving, make filter adapt to produce needs, the work efficiency of raising filter.
Accompanying drawing explanation
Fig. 1 is a kind of oil field of the present utility model modified fiber ball filter structural representation.
Fig. 2 is the filtering baffle structural representation of a kind of oil field of the present utility model modified fiber ball filter.
Fig. 3 is the part-structure schematic diagram of Section A-A in Fig. 2.
Labelling in figure: 1 is housing, 2 is main shaft, and 3 is lowering or hoisting gear, and 4 is agitator, and 5 is filtrate import, and 6 is electronic valve
Door, 7 import and export for filter packing, and 8 is observation port, and 9 is baffle plate, and 10 is filter packing, and 11 is filtering baffle, and 12 is rotary shaft,
13 is impeller, and 14 is filtrate (liquid, and 15 is unidirectional water inflow hole, and 16 is sealing shroud, and 17 is valve, and 18 is rinse water import.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order to make the purpose of utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples,
This utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain this
Utility model, is not used to limit this utility model.
As shown in Figure 1, Figure 2 and Figure 3, a kind of oil field modified fiber ball filter, including housing 1, main shaft 2 and lifting dress
Putting 3, the both sides above described housing 1 are provided with filtrate import 5, and the side in the middle part of housing 1 is provided with filter packing and imports and exports 7, middle part
Opposite side be provided with an observation port 8, the both sides of lower housing portion are provided with filtrate (liquid 14, and the centre on described housing 1 top is additionally provided with
One lowering or hoisting gear controller, the centre of lower end is provided with an agitator 4, and described main shaft 2 is provided with a baffle plate 9, described filtrate import 5
It is respectively equipped with an electronic valve 6 with described filtrate (liquid 14；A rinse water import 18, institute it is respectively equipped with at described filtrate import 5
An electronic valve 6, external connection one flushing water pump it also is provided with in stating rinse water import 18；Described main shaft 2 and described baffle plate 9 are placed in
In described housing 1, the lower section of described baffle plate 9 is provided with filter packing 10, and the lower section of described filter packing 10 is provided with filtering baffle 11,
The lower section of described filtering baffle 11 is provided with a rotary shaft 12, and the upper end of described rotary shaft 12 is provided with impeller 13, and rotary shaft 12 passes
The centre of described filtering baffle 11, and be deep in described filter packing 10, described impeller 13 is fixedly mounted on described rotary shaft
The upper end of 12 is also deep in described filter packing 10 together with rotary shaft 12, and the lower end of described rotary shaft 12 passes described housing
The lower end of 1 is connected with described agitator 4, and described agitator 4 is in transmission connection described rotary shaft 12.
In the present embodiment, it is provided with a mounting groove in the middle of described filtering baffle 11, is additionally provided with some above filtering baffle 11
Individual unidirectional water inflow hole 15, described rotary shaft 12 is connected by described mounting groove is fixing with described filtering baffle 11；Described unidirectional enter
The top in water hole 15 is provided with sealing shroud 16, is provided with valve 17 in described sealing shroud 16, and sealing shroud 16 is placed in described unidirectional water inflow hole
In 15, described valve 17 is two half moon thin slices, and toward each other, root is connected with sealing shroud 16 inwall, the trip of valve 17
From edge towards the lower section in described unidirectional water inflow hole 15, described lowering or hoisting gear 3 is a hydraulic lift, and it includes outfan, oil
Pump and electromagnetic valve, described outfan is fixing with described main shaft 2 to be connected, the fuel delivery of described electromagnetic valve control oil pump.
In the present embodiment, a kind of automatic cleaning control system for oil field modified fiber ball filter, it includes
Concentration detection module, pressure sensitive module, pressure detecting module, alarm module, lowering or hoisting gear drive module, stirrer-driven mould
Block, flow monitoring module, PLC and fine setting module, described concentration detection module is the concentration C of rinse water in detecting housing, and
Be converted to concentration digital signal and be transferred to PLC；Described pressure sensitive module is for detecting the position S of baffle plate, and is converted to pressure
Sensing digital signal is transferred to PLC；Described pressure detecting module is for detecting the pressure P of filtering baffle, and is converted to number pressure
Word signal is transferred to PLC；Flow monitoring module is for detecting in housing the flow Q at filtrate (liquid；
PLC receives each digital signal, when PLC starts, to fine setting module transmission original execution signal 000 with to lowering or hoisting gear
Module is driven to transmit initial signal 100, when receiving concentration signal C1Time, if C1＞ setting value C0, then to fine setting module transmission concentration
Performing signal 001 and drive execution signal 011 to the transmission of stirrer-driven module, the every 5min of concentration detection module is to PLC afterwards
Send concentration signal C1, C2, C3... CN, PLC stores signal C1, C2, C3... CN, and every five groups of signals calculate a meansigma methods
c1, c2, c3... cn, work as cn-1=cnAnd cn-2, cn-1, cn＞ setting value c0Time, then perform signal to fine setting module transmission concentration
002, drive to lowering or hoisting gear driving module transmission simultaneously and perform signal 012 and perform letter to the transmission driving of stirrer-driven module
Number 022；Work as cn-2, cn-1, cn＜ setting value c0Time, then report to the police to alarm module transmission and perform signal 003；When S ＞ setting value S1
Time, then drive module transmission pressure sensitive to perform signal 004 to lowering or hoisting gear；When setting value P1During ＜ P, then drive to lowering or hoisting gear
Dynamic model block transmission pressure detecting performs signal 005；The every 5min of flow monitoring module sends flow signal Q to PLC1, Q2, Q3...
QN, PLC stores signal Q1, Q2, Q3... QN, and make calculating, work as QN＜ QN-1Time, then hold to fine setting module transmission flow detection
Row signal 006 and to lowering or hoisting gear drive module transmission reset signal 007；
Described fine setting module, including the opening and closing electronic valve 6 being located at rinse water import 18 and filtrate (liquid 14, is used for connecing
Receive initial signal 000, and the electronic valve 6 controlling rinse water import 18 is opened, filtrate import 5 and the electronic valve of filtrate (liquid 14
Door 6 is closed；Perform signal 001 for receiving concentration, and the electronic valve 6 controlling rinse water import 18 is closed；Dense for receiving
Degree performs signal 002, and the electronic valve 6 controlling filtrate (liquid 14 is opened；Signal 006 is performed for receiving flow detection, and
Control the electronic valve 6 of filtrate (liquid 14 to close and control the electronic valve 6 of filtrate import 5 and open；
Described alarm module is located at the alarm on housing, is used for receiving warning and performs signal 004, and controls alarm report
Alert；Described lowering or hoisting gear drives module to include lowering or hoisting gear controller 8, is used for receiving initial signal 100, and controls lowering or hoisting gear
3 is up；Perform signal 004 for receiving pressure sensitive, and control lowering or hoisting gear 3 stop motion；Letter is performed for receiving driving
Number 012, and it is descending to control lowering or hoisting gear 3；Perform signal 005 for receiving pressure detecting, and control lowering or hoisting gear 3 stopping fortune
Dynamic；For receiving reset signal 007, and it is up to control lowering or hoisting gear 3；Described stirrer-driven module includes being located at agitator 4
In relay, be used for receiving driving and perform signal 011, and control agitator 4 and move；Signal 022 is performed for receiving driving,
And control agitator 4 stop motion.
In the present embodiment, described fine setting module includes being located at filtrate import 5, filtrate (liquid 14 and rinse water import 18
Electronic valve, described lowering or hoisting gear drive module include lowering or hoisting gear controller, be provided with many in described lowering or hoisting gear controller
Individual relay, the plurality of relay coordinates the oil pump supercharging controlled in lowering or hoisting gear or electromagnetic valve opening and closing jointly；Described stir
Mixing device drives module to be located at the relay in agitator 4, controls rotary shaft 12 and rotates or stop motion；Described concentration detection module
Being located on housing 1, position is located above filter packing 10 and between baffle plate 9, is used for detecting rinse water in filter packing 10
Concentration；Described pressure sensitive module is pressure inductor, is located on housing 1, and position is positioned at above baffle plate 9, is used for detecting gear
The position of plate 9；Described pressure detecting module is pressure transducer, is located on filtering baffle 11, for detecting filtering baffle 11
Pressure；Described alarm module is provided with alarm, and described alarm module receives alarm signal, starts alarm；Described flow is supervised
Surveying module is a flow monitoring meter, is located at filtrate (liquid 14.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (5)
1. an oil field modified fiber ball filter, including housing (1), main shaft (2) and lowering or hoisting gear (3), it is characterised in that
The both sides of described housing (1) top are provided with filtrate import (5), and the side at housing (1) middle part is provided with filter packing and imports and exports (7),
The opposite side at middle part is provided with an observation port (8), and the both sides of lower housing portion are provided with filtrate (liquid (14), described housing (1) top
Centre is additionally provided with a lowering or hoisting gear controller, and the centre of lower end is provided with an agitator (4), and described main shaft (2) is provided with a baffle plate
(9), described filtrate import (5) and described filtrate (liquid (14) are respectively equipped with an electronic valve (6)；Described filtrate import (5) place
Being respectively equipped with a rinse water import (18), also be provided with an electronic valve (6) in described rinse water import (18), external connection one is clear
Wash water pump.
2. oil field as claimed in claim 1 modified fiber ball filter, it is characterised in that described main shaft (2) and described gear
Plate (9) is placed in described housing (1), and the lower section of described baffle plate (9) is provided with filter packing (10), under described filter packing (10)
Side is provided with filtering baffle (11), and the lower section of described filtering baffle (11) is provided with a rotary shaft (12), described rotary shaft (12) upper
End is provided with impeller (13), and rotary shaft (12) is through the centre of described filtering baffle (11), and is deep into described filter packing (10)
In, described impeller (13) is fixedly mounted on the upper end of described rotary shaft (12) and is deep into described filtration together with rotary shaft (12)
In filler (10), the lower end of described rotary shaft (12) is connected through the lower end of described housing (1) with described agitator (4), described
Agitator (4) is in transmission connection described rotary shaft (12).
3. oil field as claimed in claim 2 modified fiber ball filter, it is characterised in that in the middle of described filtering baffle (11)
Being provided with a mounting groove, be additionally provided with several unidirectional water inflow holes (15) above filtering baffle (11), described rotary shaft (12) passes through institute
State that mounting groove and described filtering baffle (11) are fixing to be connected.
4. oil field as claimed in claim 3 modified fiber ball filter, it is characterised in that described unidirectional water inflow hole (15)
Top is provided with sealing shroud (16), is provided with valve (17) in described sealing shroud (16), and sealing shroud (16) is placed in described unidirectional water inflow hole
(15), in, described valve (17) is two half moon thin slices, and toward each other, root is connected with sealing shroud (16) inwall, valve
(17) free edge is towards the lower section of described unidirectional water inflow hole (15).
5. the oil field modified fiber ball filter as described in one of claim 1-4, it is characterised in that described lowering or hoisting gear
(3) being a hydraulic lift, it includes outfan, oil pump and electromagnetic valve, and described outfan is fixing with described main shaft (2) even
Connect, the fuel delivery of described electromagnetic valve control oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006563.8U CN205461191U (en) | 2015-12-08 | 2015-12-08 | Oil field is with modified fiber ball filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006563.8U CN205461191U (en) | 2015-12-08 | 2015-12-08 | Oil field is with modified fiber ball filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205461191U true CN205461191U (en) | 2016-08-17 |
Family
ID=56660347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521006563.8U Expired - Fee Related CN205461191U (en) | 2015-12-08 | 2015-12-08 | Oil field is with modified fiber ball filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205461191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363253A (en) * | 2015-12-08 | 2016-03-02 | 朱森 | Modified fiber ball filter for oilfield and automatic cleaning control system thereof |
-
2015
- 2015-12-08 CN CN201521006563.8U patent/CN205461191U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363253A (en) * | 2015-12-08 | 2016-03-02 | 朱森 | Modified fiber ball filter for oilfield and automatic cleaning control system thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20161208 |