CN205730554U - A kind of water-based drilling muds retracting device - Google Patents
A kind of water-based drilling muds retracting device Download PDFInfo
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- CN205730554U CN205730554U CN201620570629.4U CN201620570629U CN205730554U CN 205730554 U CN205730554 U CN 205730554U CN 201620570629 U CN201620570629 U CN 201620570629U CN 205730554 U CN205730554 U CN 205730554U
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- screen cloth
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Abstract
The utility model discloses a kind of water-based drilling muds retracting device, including screen box, vibrating motor, gripper shoe, screen box one end be provided above charging aperture, the other end is provided with solid phase discharging opening, screen frame it is provided with in screen box, it is provided with screen cloth in described screen frame, the liquid phase feed box connected with screen box it is provided with below solid phase discharging opening, liquid phase discharging opening it is provided with bottom liquid phase feed box, liquid phase feed box side connects exhaust column, exhaust column connects air exhauster, along charging aperture to the direction of solid phase discharging opening, screen frame is equidistantly provided with some spring stop devices.This utility model makes drilling fluid after impact screen, the liquid phase departing from solid phase particles is easier to enter to below screen cloth, do not result in blocking screen cloth, not only increase the drilling fluid vibrating sieve treating capacity to drilling fluid, also reduce the load of screen cloth, air-flow also makes drilling fluid when occurring to clash into screen cloth, and the impulse force of shock strengthens so that solid phase particles is easier to separate with liquid phase.
Description
Technical field
This utility model relates to drilling fluid reclamation field, is specifically related to a kind of water-based drilling muds retracting device.
Background technology
Drilling fluid is the general name of the various circulation of fluids used in drilling process, and drilling fluid is also referred to as drilling mud.?
In drilling process, drilling fluid can effectively cool down and lubricate drill bit, additionally it is possible to balancing layer pressure, it is to avoid blowout and well occur
Gushing, in addition, drilling fluid can also transmit power and coring sampling.Different according to disperse medium, drilling fluid is broadly divided into water
Base drilling fluid, oil base drilling fluid gentle base drilling fluid three major types.
In drilling process, drilling fluid enters to bottom by drilling rod, after completing its effect with drilling well in produce useless
Slag is discharged together, owing to drilling fluid not only price is high but also understands welding, so should reclaim drilling fluid, solid controlling
System is for reclaiming drilling fluid.Solid controlling system is also called drilling-fluid circulation system and drilling fluid cleaning system.Solid controlling system
System mainly includes the solid control equipments such as drilling fluid vibrating sieve, vacuum degasser, desander, desilter, horizontal spiral centrifuge.These
Solid control equipment, just as a series of sizes, sieve that function is different, realizes the purification to drilling fluid and recycling by filtering layer by layer.
Drilling fluid vibrating sieve is for circulation of drilling fluid, the one-level solid control equipment of cleaning system, has oscillation intensity height, sieve
Facet amasss the features such as big.Drilling fluid vibrating sieve is mainly used in removing bore meal particles bigger in drilling fluid, safeguards the property of drilling fluid
Can the treatment effect of solid control equipment after ensureing and service life, be equipment most important in solid controlling system.
Traditional drilling fluid vibrating sieve is during the liquid phase and solid phase particles of screening drilling fluid, and part drilling fluid remains
In sieve aperture on screen cloth, cause the liquid phase in drilling fluid can not flow in screen box, cause running pulp, lose expendable-limited-recoverable brill
Well liquid liquid phase, not only pollutes environment and also add drilling cost.It addition, the drilling fluid remained in sieve aperture not only reduces drilling well
The treating capacity of liquid vibrosieve, also results in the load on screen cloth and increases, damage screen cloth.
Utility model content
Technical problem to be solved in the utility model is the shortcoming for tradition drilling fluid vibrating sieve, it is therefore intended that provide
A kind of water-based drilling muds retracting device, solves traditional drilling fluid vibrating sieve drilling fluid in screening process and easily remains in sieve
Cause callable liquid phase in drilling fluid to run off in online sieve aperture, drilling fluid vibrating sieve treating capacity reduces and is easily damaged screen cloth
Problem.
This utility model is achieved through the following technical solutions: a kind of water-based drilling muds retracting device, including screen box, screen box
Lower section is provided with vibrating motor, is provided with gripper shoe outside screen box, and connecting below gripper shoe has tensioning spring, tensioning spring lower end
Connect have pillar, screen box one end be provided above charging aperture, the other end is provided with solid phase discharging opening, is provided with screen cloth in screen box
Frame, is provided with screen cloth in screen frame, screen cloth is gradually lowered to the direction of solid phase discharging opening along charging aperture with the distance of horizontal plane, Gu
Being provided with the liquid phase feed box connected with screen box below phase discharging opening, liquid phase feed box is positioned at below screen cloth, at the bottom of liquid phase feed box
Portion is provided with liquid phase discharging opening, and liquid phase feed box side connects exhaust column, and exhaust column connects air exhauster, along charging aperture to solid
The direction of phase discharging opening, is equidistantly provided with some spring stop devices on screen frame.In prior art, traditional drilling fluid
Vibrosieve is during the liquid phase and solid phase particles of screening drilling fluid, and part drilling fluid remains in the sieve aperture on screen cloth, leads
The liquid phase caused in drilling fluid can not flow in screen box, causes running pulp, loses expendable-limited-recoverable drilling fluid liquid phase, and remain in
Drilling fluid in sieve aperture not only reduces the treating capacity of drilling fluid vibrating sieve, also results in the load on screen cloth and increases, damages screen cloth.
In order to solve the problems referred to above, this utility model provides a kind of drilling fluid vibrating sieve with exhausting system.This device is in solid phase
It is provided with liquid phase feed box below discharging opening, liquid phase feed box connection screen box is positioned at the space below screen cloth, liquid phase feed box
Side by exhaust column connect have air exhauster.When using this device, first turn on vibrating motor and air exhauster, treat drilling fluid from
After charging aperture enters to screen cloth, the effect of vibration of drilling fluid motor vibrated, the normal direction along screen cloth is thrown, and then falls
And impinging upon on screen cloth, the liquid phase in drilling fluid enters in screen box by the sieve aperture on screen cloth, and solid phase particles continues at screen cloth
Top is continued vibrated effect and is thrown and impact screen, when impact screen separates the liquid phase carried, while to solid phase
Discharging opening moves.Air exhauster makes air-flow enter to below screen cloth by sieve aperture above screen cloth, enters liquid phase feed box afterwards,
Air is drained into eventually through air exhauster.Air-flow, when by sieve aperture, forms negative pressure so that drilling fluid between the upper and lower of screen cloth
After impact screen, the liquid phase departing from solid phase particles is easier to enter to below screen cloth, does not results in blocking screen cloth, not only strengthens
The drilling fluid vibrating sieve treating capacity to drilling fluid, also reduces the load of screen cloth, extends the service life of screen cloth；It addition,
Air-flow also makes drilling fluid when occurring to clash into screen cloth, and the impulse force of shock strengthens so that easier with liquid phase point of solid phase particles
From, improve the yield of liquid phase capable of circulation；Meanwhile, the liquid phase that air-flow can also accelerate in screen box moves to liquid phase feed box, adds
Fast recovery speed.
Further, spring stop device includes the fixed dam being fixed on screen frame, fixed dam bottom surface longer
While be perpendicular to screen frame, the height of fixed dam is parallel to the normal direction of screen frame, and fixed dam is on the side of charging aperture
Being provided with spring, described spring connects cushion pad, also includes the moving stop being parallel to fixed dam, moving stop and buffering
Pad contact, moving stop top arranges rotating shaft, and rotating shaft is provided with screw thread on the side of bottom, and mobile gear is run through in rotating shaft bottom
Plate is inserted on screen frame in the screw arranged.Traditional drilling fluid vibrating sieve uniquely relies on screen cloth and sieves, and is being sieving through
In journey, part tape-supported adhesive has the solid particle of drilling fluid liquid phase just to have moved to exit with liquid phase separation when not opening to carry out
Collect, cause the liquid phase loss that can be recycled in drilling fluid.Owing to drilling fluid liquid phase not only comprising disperse medium such as water, also
Contain the chemical substances such as inorganic agent, add the use cost of drilling fluid if process, do not process, pollute the environment.In order to
Solving the problems referred to above, this utility model is provided with some spring stop devices on screen frame, and this device includes moving stop
And being each attached on screen frame of fixed dam, moving stop and fixed dam, and extend on screen cloth.Moving stop top sets
Being equipped with rotating shaft, rotating shaft bottom end side surface is provided with screw thread, and the activity of rotating shaft bottom runs through moving stop and is inserted on screen frame setting
The screw matched in, moving stop can be threaded connection around rotating shaft System of Rotating about Fixed Axis, also can countershaft, moving stop
It is replaced Deng parts.Being provided with spring between moving stop and fixed dam, spring is vertically mounted on the side of fixed dam,
On one end that spring contacts with moving stop, cushion pad is installed.When drilling fluid flows into from charging aperture, drilling fluid is being shaken
Impinging upon while action on moving stop, drilling fluid produces impulse force to moving stop, and drilling fluid is produced anti-by moving stop
Active force, after reaction force acts is on drilling fluid, owing in drilling fluid, liquid phase is different from the bounce-back dynamics of solid phase, solid phase is anti-
The distance that the distance of bullet rebounds compared with liquid phase is remote, separates the solid phase in drilling fluid and liquid phase the most further, it is to avoid liquid phase also future
Obtain and separate with solid phase just along with solid phase movement to screened outlet, causing drilling fluid liquid phase capable of circulation to lose；It addition, it is a part of
Liquid phase also can stick on moving stop, along with effect of vibration slowly from moving stop landing on screen cloth and eventually through sieve
Hole enters in screen box, and this Partial Liquid Phase not only achieves and separates with solid phase, moreover it is possible to plays and alleviates drilling fluid to moving stop
Clash into, play the effect of protection moving stop.Moving stop, after being clashed into, can rotate a segment distance towards fixed dam, it
Rebounded by the support of spring afterwards, be so possible not only to shed a part of impulse force, impulse force is transferred on cushion pad and spring,
Avoid moving stop to damage in frequently clashing into, increase the moving stop bounce-back dynamics to drilling fluid also by spring simultaneously,
Further such that the liquid phase in drilling fluid separates with solid phase.This device makes the liquid phase in drilling fluid separate further with solid phase,
Strengthen screening effect, it is to avoid in screening process, the when that especially the influx of drilling fluid increasing suddenly, in drilling fluid
Liquid phase also has not enough time to separate with solid phase at just along with solid phase movement to screened outlet, causes the loss of liquid phase capable of circulation, not only
Reduce the use cost of drilling fluid, also protect environment.
Further, 1.5 to 2 times of a length of fixed dam length of moving stop.Moving stop plays and divides further
Solid phase and the effect of liquid phase in drilling fluid, fixed dam is installed spring moving stop is played a part resilient support.Warp
Cross practice to find, if the length of moving stop is less than 1.5 times of fixed dam length, moving stop and the contact surface of drilling fluid
Long-pending the least, inferior separating effect, part drilling fluid also can be deposited in the side of fixed dam；If the length of moving stop is more than solid
Determine baffle length 2 times, owing to moving stop is located proximate to rotating shaft by spring supporting effect so that the rotation of moving stop
Amplitude is excessive, cannot return to original position in time and stop drilling fluid after shedding part impulse force, and blocking effect is poor.
Further, moving stop surface scribbles synthetic enamel.Synthetic enamel is mainly used in the protection of metal surface, due to
Moving stop can be frequently by the shock in drilling fluid, and the solid phase of drilling fluid can produce scraping to its surface, reduce moving stop
Life-span, the surface of moving stop can be played a protective role, extend its service life by synthetic enamel.In practice, mainly make
With the antirust enamel paint of C53-31, this enamel paint has good adhesive force and pliability, it is possible to play good to moving stop surface
Protected effect.
Further, cushion pad is made up of nitrile rubber.Nitrile rubber not only has cushioning effect, can shed moving stop
On part impulse force, also there is certain intensity and frictional behaviour so that spring is support during moving stop will not be by
Occur relative movement to cause support effect to be deteriorated between moving stop, make moving stop cannot return to original position.
Further, screen box bottom surface is parallel to screen cloth.The distance of screen box bottom surface and horizontal plane also along charging aperture to solid phase
The direction of discharging opening and be gradually lowered so that from screen cloth, filter the liquid phase to screen cloth can collect to liquid phase feed box, just
In collecting liquid phase.
Further, exhaust column is PVC transparent wired hose.PVC i.e. polrvinyl chloride, in PVC transparent wired hose is PVC
The transparent hose of embedding threaded metal steel wire, has not embrittlement, is difficult to the advantages such as aging, uses PVC transparent wired hose to be easy to behaviour
The liquid phase making whether to have in personal observations's exhaust column drilling fluid enters, if it is observed that liquid phase is piled up more in exhaust column, and can
Exhaust column is pulled down cleaning.
This utility model compared with prior art, has such advantages as and beneficial effect:
1, this utility model is by arranging liquid phase feed box, exhaust column and air exhauster so that have air-flow in the sieve aperture of screen cloth
Passing through, drilling fluid, when by screen cloth, is affected by screen cloth upper and lower negative pressure, after impact screen, departs from solid phase particles
Liquid phase is easier to enter to below screen cloth, does not results in blocking screen cloth, not only increases the drilling fluid vibrating sieve place to drilling fluid
Reason amount, also reduces the load of screen cloth, extends the service life of screen cloth, and air-flow also makes drilling fluid clash into screen cloth
Time, the impulse force of shock strengthens so that solid phase particles is easier to separate with liquid phase, improves the yield of liquid phase capable of circulation, meanwhile,
The liquid phase that air-flow can also accelerate in screen box moves to liquid phase feed box, accelerates recovery speed；
2, this utility model is by being provided with spring stop device on screen cloth so that the liquid phase in drilling fluid is entered with solid phase
One step separates, and strengthens screening effect, it is to avoid in screening process, the when that especially the influx of drilling fluid increasing suddenly,
Liquid phase in drilling fluid also has not enough time to separate with solid phase at just along with solid phase movement to screened outlet, causes liquid phase capable of circulation
Run off, not only reduce the use cost of drilling fluid, also protect environment；
3, spring stop device of the present utility model is additionally provided with spring and cushion pad so that moving stop is being clashed into
After, a segment distance can be moved towards fixed dam, be rebounded by the support of spring afterwards, so be possible not only to shed part punching
Power, is transferred to impulse force on cushion pad and spring, it is to avoid moving stop damages in frequently clashing into, and increases also by spring simultaneously
The moving stop bounce-back dynamics to drilling fluid, further such that the liquid phase in drilling fluid separates with solid phase.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the one of the application
Part, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is this utility model structural representation；
Fig. 2 is the enlarged diagram of A in Fig. 1.
The parts title of labelling and correspondence in accompanying drawing:
1-screen box, 2-screen cloth, 3-screen frame, 4-vibrating motor, 5-pillar, 6-tensioning spring, 7-air exhauster, 8-liquid phase goes out
Hopper, 9-solid phase discharging opening, 10-charging aperture, 11-moving stop, 12-fixed dam, 13-rotating shaft, 14-spring, 15-buffers
Pad.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and explanation thereof are only used for explaining this
Utility model, is not intended as restriction of the present utility model.
Embodiment
As depicted in figs. 1 and 2, this utility model is a kind of water-based drilling muds retracting device, including screen box 1, screen box 1 time
Side is provided with vibrating motor 4, is provided with gripper shoe outside screen box 1, and connecting below gripper shoe has tensioning spring 6, tensioning spring 6 times
End connection have pillar 5, screen box 1 one end be provided above charging aperture 10, the other end is provided with solid phase discharging opening 9, sets in screen box 1
Being equipped with screen frame 3, be provided with screen cloth 2 in screen frame 3, the distance of screen cloth 2 and horizontal plane is along charging aperture 10 to solid phase discharging opening 9
Direction is gradually lowered, and solid phase discharging opening 9 side is provided with and the logical liquid phase feed box 8 of screen box 1, and liquid phase feed box 8 is positioned at screen cloth 2 times
Side, is provided with liquid phase discharging opening bottom liquid phase feed box 8, liquid phase feed box 8 side connects exhaust column, and exhaust column connects to be taken out
Blower fan 7, along the direction of charging aperture 10 to solid phase discharging opening 9, is equidistantly provided with some spring stop devices on screen frame 3.
Spring stop device includes the fixed dam 12 being fixed on screen frame 3, and the longer sides of fixed dam 12 bottom surface is perpendicular to screen cloth
Frame 3, the height of fixed dam 12 is parallel to the normal direction of screen frame 3, and fixed dam 12 is installed on the side of charging aperture 10
Having a spring 14, spring 14 connects cushion pad 15, also includes the moving stop 11 being parallel to fixed dam 12, moving stop 11 with
Cushion pad 15 contacts, and moving stop 11 top arranges rotating shaft 13, and rotating shaft 13 is provided with screw thread, rotating shaft 13 on the side of bottom
Bottom is run through moving stop 11 and is inserted on screen frame 3 in the screw arranged.The a length of fixed dam 12 of moving stop 11 is long
1.5 to 2 times of degree.Moving stop 11 surface scribbles synthetic enamel.Cushion pad 15 is made up of nitrile rubber.Screen box 1 bottom surface is parallel
In screen cloth 2.Exhaust column is PVC transparent wired hose.When using this device, first turn on vibrating motor 4 and air exhauster 7, convulsion
Machine 7 makes air-flow enter to below screen cloth 2 by sieve aperture above screen cloth 2, enters liquid phase feed box 8 afterwards, eventually through taking out
Blower fan 7 drains into air.When drilling fluid drops down onto screen cloth 2 from charging aperture 10 entrance, drilling fluid is while effect vibrated
Impinge upon on moving stop 11, moving stop 11 by the counteracting force of drilling fluid is separated further solid phase in drilling fluid and
Liquid phase, it is to avoid liquid phase also has not enough time to separate with solid phase just along with solid phase movement to screened outlet, causes drilling fluid capable of circulation
Liquid phase is lost；Moving stop 11, after being clashed into, can move a segment distance towards fixed dam, afterwards by the support of spring 14
And rebound, so it is possible not only to shed a part of impulse force, impulse force is transferred on cushion pad 15 and spring 14, it is to avoid moving stop
11 damage in frequently clashing into, and increase the moving stop 11 bounce-back dynamics to drilling fluid also by spring 14, further simultaneously
Liquid phase in drilling fluid is separated with solid phase, and final solid phase is collected by solid phase discharging opening 9, and liquid phase is received by liquid phase discharging opening
Collection.This device makes drilling fluid after impact screen 2, and the liquid phase departing from solid phase particles is easier to enter to below screen cloth 2, will not
Result in blockage screen cloth 2, not only increases the drilling fluid vibrating sieve treating capacity to drilling fluid, also reduces the load of screen cloth 2, prolongation
Service life of screen cloth 2；It addition, air-flow also makes drilling fluid when occurring to clash into screen cloth 2, the impulse force of shock strengthens, makes
Obtain solid phase particles to be easier to separate with liquid phase, improve the yield of liquid phase capable of circulation；Meanwhile, during air-flow can also accelerate screen box 1
Liquid phase move to liquid phase feed box 8, accelerate recovery speed.
Above-described detailed description of the invention, is entered the purpose of this utility model, technical scheme and beneficial effect
One step describes in detail, be it should be understood that and the foregoing is only detailed description of the invention of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all within spirit of the present utility model and principle, any amendment, the equivalent made are replaced
Change, improvement etc., within should be included in protection domain of the present utility model.
Claims (7)
1. a water-based drilling muds retracting device, including screen box (1), described screen box (1) lower section is provided with vibrating motor (4),
Screen box (1) outside is provided with gripper shoe, and connecting below described gripper shoe has tensioning spring (6), and described tensioning spring (6) lower end is even
Be connected to pillar (5), screen box (1) one end be provided above charging aperture (10), the other end is provided with solid phase discharging opening (9), screen box
(1) it is provided with screen frame (3) in, in described screen frame (3), is provided with the distance edge of screen cloth (2), described screen cloth (2) and horizontal plane
Charging aperture (10) is gradually lowered to the direction of solid phase discharging opening (9), it is characterised in that solid phase discharging opening (9) lower section be provided with
The liquid phase feed box (8) that screen box (1) connects, described liquid phase feed box (8) is positioned at screen cloth (2) lower section, liquid phase feed box (8) bottom
Being provided with liquid phase discharging opening, liquid phase feed box (8) side connects exhaust column, and described exhaust column connects air exhauster (7), along entering
Material mouth (10), to the direction of solid phase discharging opening (9), is equidistantly provided with some spring stop devices on screen frame (3).
A kind of water-based drilling muds retracting device the most according to claim 1, it is characterised in that described spring stop device
Including the fixed dam (12) being fixed on screen frame (3), the longer sides of described fixed dam (12) bottom surface is perpendicular to screen frame
(3), the height of fixed dam (12) is parallel to the normal direction of screen frame (3), and fixed dam (12) is near the side of charging aperture (10)
Being provided with spring (14) on face, described spring (14) connects cushion pad (15), also includes the shifting being parallel to fixed dam (12)
Dynamic baffle plate (11), moving stop (11) contacts with cushion pad (15), and moving stop (11) top arranges rotating shaft (13), described rotating shaft
(13) being provided with screw thread on the side of bottom, rotating shaft (13) bottom is run through moving stop (11) and is inserted on screen frame (3)
In the screw arranged.
A kind of water-based drilling muds retracting device the most according to claim 2, it is characterised in that described moving stop (11)
1.5 to 2 times of a length of fixed dam (12) length.
A kind of water-based drilling muds retracting device the most according to claim 2, it is characterised in that described moving stop (11)
Surface scribbles synthetic enamel.
A kind of water-based drilling muds retracting device the most according to claim 2, it is characterised in that described cushion pad (15) by
Nitrile rubber is made.
A kind of water-based drilling muds retracting device the most according to claim 1, it is characterised in that described screen box (1) bottom surface
It is parallel to screen cloth (2).
A kind of water-based drilling muds retracting device the most according to claim 1, it is characterised in that described exhaust column is PVC
Transparent wired hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570629.4U CN205730554U (en) | 2016-06-15 | 2016-06-15 | A kind of water-based drilling muds retracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570629.4U CN205730554U (en) | 2016-06-15 | 2016-06-15 | A kind of water-based drilling muds retracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205730554U true CN205730554U (en) | 2016-11-30 |
Family
ID=57385425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620570629.4U Expired - Fee Related CN205730554U (en) | 2016-06-15 | 2016-06-15 | A kind of water-based drilling muds retracting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205730554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971535A (en) * | 2016-06-15 | 2016-09-28 | 成都来宝石油设备有限公司 | Oil-base drilling fluid recycling device |
| CN116752917A (en) * | 2023-08-17 | 2023-09-15 | 河南中正石油起重机械有限公司 | Negative pressure shale shaker for well drilling |
-
2016
- 2016-06-15 CN CN201620570629.4U patent/CN205730554U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971535A (en) * | 2016-06-15 | 2016-09-28 | 成都来宝石油设备有限公司 | Oil-base drilling fluid recycling device |
| CN116752917A (en) * | 2023-08-17 | 2023-09-15 | 河南中正石油起重机械有限公司 | Negative pressure shale shaker for well drilling |
| CN116752917B (en) * | 2023-08-17 | 2023-12-19 | 河南中正石油起重机械有限公司 | Negative pressure shale shaker for well drilling |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20170615 |
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| CF01 | Termination of patent right due to non-payment of annual fee |