CN204627496U - A kind of oil extractor packing box sealing device - Google Patents
A kind of oil extractor packing box sealing device Download PDFInfo
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- CN204627496U CN204627496U CN201320779612.6U CN201320779612U CN204627496U CN 204627496 U CN204627496 U CN 204627496U CN 201320779612 U CN201320779612 U CN 201320779612U CN 204627496 U CN204627496 U CN 204627496U
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- packing box
- oil
- packing
- extractor
- sealing device
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Abstract
The utility model belongs to piston rod packing technical field, especially belongs to a kind of oil extractor packing box technical field of sealing technology.A kind of oil extractor packing box sealing device, comprises leak fluid cycling mechanism, the quick drawing-out mechanism of packing, bias and inclination eliminating machine, packing box.The booster pump work that leak fluid cycling mechanism relies on well head pressure circulation change to drive large and small piston and back-moving spring to form, with viscosity stabilization, viscosity greatly, not easily run off with leak, the material of high lubricating effect replaces the easy crude oil run off to seal as consuming fluid, reclaim the consumption fluid leaked and push back annular seal space, and with consumption fluid being pushed back in oil pumper by fluid-encapsulated.The quick drawing-out mechanism of packing the mixture of steel ball and lubricating grease is pressed into dismounting eject chamber, ejects dismounting ejector sleeve and packing.Eccentric and inclination eliminating machine comprises: the correction of two sphere centering body, Internal Spherical Surface seat, Internal Spherical Surface pressed seat; Or bias and inclination eliminating machine are for flexibly connecting.
Description
Technical field
The utility model belongs to piston rod packing technical field, especially belongs to a kind of oil extractor packing box technical field of sealing technology.
Background technology
The bending beam type oil pumper of petroleum collection is as the most general type, and because rod-pumped well mouth pressure is comparatively large, general back pressure 1.0 ~ 4.0MPa, the overwhelming majority exists the sealing problem between polished rod and packing box.The course of work and the piston rod of oil-extractor polish-rod are similar, constantly move back and forth, pass from oil extractor packing box from high-pressure sealing chamber to airspace, must keep good sealing; Although it only bears pulling force, do not bear pressure, in situation like shape and slender rod type, what existence and stability did not cause bends.But because the physical dimension of oil pumper own is larger, connecting link between the horse head of traction polished rod and oil pumper is more, dimension chain stability complicated, impact in the polished rod course of work, vibrations larger, the leakage problem of packing_seal is comparatively difficult to resolve certainly, needs periodic maintenance, changes sealed packing minimizing leakage rate.Change packing and need well head pressure release, operation requirements is high, and the time is long, and production loss is large.
And packing_seal itself requires to keep certain permission leakage rate.The sealing principle of packing filling depends primarily on labyrinth effect and bearing effect.Labyrinth effect: axle, in the out-of-flatness very of microcosmic soffit, can only partly be fitted with packing, and part does not contact, so there is small gap between packing and axle, as labyrinth, pressurized fluid repeatedly by throttling, thus reaches the effect of sealing in gap.Bearing effect: the liquid film that can there is thin layer between packing filling and axle, makes packing filling and axle be similar to sliding bearing, serves certain lubrication, thus avoid the excessive wear of packing and axle.
According to packing service regeulations: before running, first test running in the non-loaded state, observes with or without abnormal conditions, then formally drives, careful observation: have no-arbitrary pricing to press unreal or tension, and cause serious leak or burn out the phenomenon of filler.Key during pump startup is to be sure of that it leaks when starting.If at the beginning packing is fastened to No leakage state, then filler of burning causes leaking.
After installation packing ring, tighten bolt, and confirm that material lid correctly engages with stuffing box face.Once fastening bolt, each bolt uniform stressed be guaranteed.
If apply an external lubrication system, should be sure of that it can true(-)running before activation.
High-leakage rate is allowed during startup.During this process, packing peace position also starts to work.
Operate after about 15-30 minute, fastening bolt is until leakage reaches allowed band again.Recommendation leakage rate 8-10 point/minute.Tetrafluoroethene filler should allow more large discharge to derive heat energy to reduce thermal expansion.
And because oil field oil change is complicated, possible corrosion damage oil-extractor polish-rod, the polished rod be corroded can very fast cutting damage packing.
In oil pumper, pressure moves back and forth along with polished rod, periodically significantly changes, makes packing bear alternating stresses, exacerbate the difficulty of packing_seal.
Facts have proved in a large number, the bias between packing box and oil-extractor polish-rod, is the principal element causing packing box leakage and packing Rapid Damage.And many packing box centering technology are higher due to construction technical requirement, not easily realize design object.
Safeguard that packing box becomes one of principal element affecting oil recovery amount with replacing packing.In order to improve this situation, improve crude output, the older generations have carried out unremitting effort, especially obvious at Daqing oil field.Be wound around cloth outward such as to packing box, decrease packing box leakage of oil more significantly; Eccentric correcting mechanism is set, improves sealing, slow down the one-way abrasion of packing; Arrange to gland for packing box and screw handle, regularly tighten packing compensate for wear, extend the packing replacing cycle.
After but these measures are implemented, general 60 days of packing replacing cycle, the longest close to 200 days, still can not meet the needs of field produces to production capacity, environmental protection.Often there is oil water mixture winter and spill the fault formed ice cube needs and manually remove from packing box.
And it is not very convenient to take out old packing when changing packing yet.
Meanwhile, these corrective measures are higher to construction requirement, limit the actual performance of technical advantage.
Utility model content
In order to improve field operations situation, improve oil recovery economic benefit, the utility model discloses a kind of highly reliable packing box sealing device non-maintaining for a long time.Comprise packing box, leak fluid reclaims cycling mechanism, packing; Oil-extractor polish-rod passes from packing box, and packing box is provided with packing box housing, interior sealing, gland, and packing is contained between packing box housing and oil-extractor polish-rod; Be provided with leak fluid and reclaim cycling mechanism, leak fluid reclaims cycling mechanism and is provided with booster pump, absorbing cavity, booster cavity, absorbing cavity is located at the top of the interior sealing in packing box housing, booster cavity is located at the below of the interior sealing in packing box housing, thus leak fluid recovery cycling mechanism and packing box are coupled together.
First, analyzing the operating characteristic of the existing piston rod of oil-extractor polish-rod that packing box coordinates, is again a kind of special piston rod; Oil-extractor polish-rod has self Bearning mechanism, relies on pumping unit horsehead and gravity and oil well pump to define position and the direction of oil-extractor polish-rod, and what reoffer that bearing just exists mechanical aspects crosses location; Thus only need sealing, do not need to provide bearing, even packing box provides bearing function to be harmful on the contrary.Secondly, packing box sealing load is higher, is not suitable for the hermetically-sealed construction rashly using below 1MPa.Further, due to the longer inconvenience dismounting of oil-extractor polish-rod length, the potted component of not opening thus should not be used.Importantly, oil pumper, as the machine relying on time integral yield composition benefit, does not have to supply maintaining too much downtime; Again importantly, the oil pumper overwhelming majority is arranged on outdoor, or severe cold or the area such as wilderness, mountain area, desert, island, offshore platform that is extremely hot or moist or drying, expose to the sun and rain, condition of work and the repair and maintenance condition of work of oil pumper itself are severe.More there is globalization, the requirement of environmental protection and economic benefit, need oil pumper environmental protection, leak free reliably working.Certainly, it is crucial that, as the Oil-production Enterprises of commodity production, require oil pumper, both economy, buying maintenance cost low (certainly comprising the polished rod motion frictional force heavy motor load waste that can not increase sealing force because of good sealing effect and cause), again can long-term non-maintaining work.
Based on above-mentioned 6 points, the packing box sealing device that the utility model open a kind of " permission " leaks, it is the condition that when utilizing oil-extractor polish-rod to move up and down, in oil pumper, pressure changes greatly, drive the piston movement that two section area significant differences link together, form booster pump, the fluid recovery of leaking is pumped into sealing system again to reduce the actual leakage rate of fluid, the fluid of the leakage overwhelming majority is leaked out from annular seal space and pumps into annular seal space again, reciprocation cycle, form leak fluid cycling mechanism, realize the technical purpose that the actual leakage rate of packing box is little.Spherical packing box is set from alignment mechanism, makes workman automatically packing box is pressed onto the direction parallel and concentric with polished rod and position in the process screwing clamping nut.Packing drawing-out mechanism is set, facilitates the replacing of old packing.
Leak fluid cycling mechanism be the fluid leaked or the cheapness can supplemented from nature and (or) not contaminated-fluid pump into sealing position, significantly reduce fluid actual leakage rate.
And by consuming fluid replacement seal fluid, fluid-encapsulated leakage is seldom even no longer leaked.And leak consumption fluid by booster pump again pumped into sealing position recycle.
Consume air, water etc. that fluid can select cheap environmental protection.
Be oil extractor packing box leakage principal element for eccentric and inclination, efficient easy-operating bias and inclination eliminating machine are set.
Can select with fluid-encapsulated immiscible, hydrodynamics index is stable is convenient to design seal parameters, viscosity and not easily runs off comparatively greatly the material leaked, such as 7905-3 high/low temperature stop-leak compound, as consuming fluid.With viscosity stabilization and the sealing of high/low temperature stop-leak compound that viscosity not easily runs off comparatively greatly replaces the crude oil sealing of Parameters variation complexity, significantly improve the lubricant effect to oil-extractor polish-rod and packing simultaneously.And this high/low temperature stop-leak compound and crude oil, water, petroleum oil are immiscible, good sealing, lubrication are played in the gap that can penetrate into packing, again seldom can because run off with by fluid-encapsulated contact.
High/low temperature stop-leak compound is also embedded in " pit " that produce after oil-extractor polish-rod is corroded, even almost fills and leads up " pit ", slows down " pit " cutting damage to packing and other obturator.
The large piston of booster pump and valve piston also adopt high/low temperature stop-leak compound to seal and lubrication.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an oil extractor packing box sealing device embodiment.
Fig. 2 is the remainder embodiment schematic diagram that oil extractor packing box sealing device one does not have alignment mechanism.
Fig. 3 adopts the oil extractor packing box sealing device embodiment schematic diagram flexibly connected with well head.
In figure, 1 packing box, 1-1 gland, 1-2 felt dust-proof cushion, 1-3 external seal, 1-4 absorbing cavity, sealing in 1-5,1-6 seals positioning sleeve, 1-7 booster cavity, 1-8 packing, 1-9 dismantles ejector sleeve, and 1-10 dismounting ejects chamber, 1-11 packing box housing, 1-12 oil pressure induction cavity, and 1-13 condenses chamber; The two sphere centering body of 2-1,2-2 Internal Spherical Surface correction seat, 2-3 sealing mat, 2-4 centering gland, 2-5 centering gland screw-threaded coupling screw, maintenance screw is put, 2-7 Internal Spherical Surface pressed seat in 2-6 correction seat; 3 oil-extractor polish-rods; 4 well head Connection Blocks; 5 booster pump screw plugs; The large piston of 6-1,6-2 back-moving spring, 6-3 breather valve, 6-4 force feed valve, 6-5 valve piston, 6-6 oil sucting valve; 7 well head flexible connecting seats; 8 oil high-pressure hoses; 9 high-pressure hose clips; 10 packing box flexible connecting seats.
Detailed description of the invention
Present embodiment by reference to the accompanying drawings, further illustrates the technical solution of the utility model.
One, seal positioning sleeve 1-6 and oil-extractor polish-rod 3 is almost gapless is slidably matched, play the positioning action between packing box and oil-extractor polish-rod 3; Keep oil-extractor polish-rod parallel with gravity direction, screw centering gland 2-4, by compressing Internal Spherical Surface pressed seat 2-7, Internal Spherical Surface pressed seat 2-7 and two sphere centering body 2-1, Internal Spherical Surface sphere-contact normal pressure between seat 2-2 of rectifying a deviation is relied on to produce the mechanical force that position correction needs, reduce packing box position centering to the technical requirements of operative, easy for installation.Dependence sealing positioning sleeve 1-6 determines the desirable coaxial position between packing box and oil-extractor polish-rod, gap between sealing positioning sleeve 1-6 and oil-extractor polish-rod 3 is very little, is ensureing that under the prerequisite that easy slide between sealing positioning sleeve 1-6 and oil-extractor polish-rod 3, friction power loss are little, aforementioned gap is close to zero; And seal the endoporus of positioning sleeve 1-6 and between the surface that on packing box, other coordinates with oil-extractor polish-rod 3, keep accurate coaxial precision.
Sealing positioning sleeve 1-6 preferentially adopts that elastic stability is good, good, the anti abrasive modification PTFE of self lubricity.
Two, high/low temperature stop-leak compound is filled in advance to booster cavity 1-7 and valve piston 6-5 upper end, large piston 6-1, use high/low temperature stop-leak compound lubrication and seal between valve piston 6-5 and cylinder body.When the pressure in oil pipe on oil pumper increases, by oil pressure induction cavity 1-12, oil pressure is delivered to large piston 6-1 lower surface, promote valve piston 6-5 moves, and because the difference of the face area of two pistons produces motive force, after overcoming the elastic force of back-moving spring 6-2, the pressure being greater than synchronization Wellhead crue oil pressure is produced in the upper surface of valve piston 6-5, back down force feed valve 6-4 high/low temperature stop-leak compound press-in booster cavity 1-7, and formed in booster cavity 1-7 even higher than the pressure of synchronization oil pumper oil pressure, the crude oil attempting to leak from packing is pushed back oil pumper.The Free up Memory of crude oil is reserved when on the other hand large piston 6-1 moving.Reduce the possibility that crude oil leaks from packing.Because the gap sealed between the endoporus of positioning sleeve 1-6 and the external surface of oil-extractor polish-rod 3 is very little, the high pressure sealing fat in booster cavity 1-7 has and leaks outside on a small quantity.Absorbing cavity 1-4 is provided with between interior sealing 1-5 and external seal 1-3; When the pressure in oil pipe on oil pumper reduces, the pressure being delivered to large piston 6-1 lower surface by oil pressure induction cavity 1-12 is reduced, large piston 6-1 drives valve piston 6-5 to move down under the effect of back-moving spring 6-2, suction opens oil sucting valve 6-6 the high/low temperature stop-leak compound inspiration booster pump of (being leaked into by sealing positioning sleeve 1-6 and interior sealing 1-5 in booster cavity 1-7) absorbing cavity 1-4, at next pressures cycle booster pump again these high/low temperature lubricating grease from absorbing cavity 1-4 inspiration press-in booster cavity 1-7.Realize recycling of high/low temperature stop-leak compound, thus almost do not leak.
As can be seen from schematic diagram, external seal 1-3 and the interior 1-5 that seals is two sealing rings, is namely provided with potted component in the outer end of the outer end that leak fluid has been leaked and inner, booster pump absorbing cavity 1-4 and the inner simultaneously.The outer end that leak fluid has been leaked is provided with external seal 1-3.
Three, outside external seal 1-3 and location sealing cover 1-6, cohesion chamber 1-13 is provided with.Like this, even if first a small amount of high/low temperature stop-leak compound leaked accumulates to cohesion chamber 1-13, hamper further leakage on the one hand, make almost not leak outside for a long time on the other hand.Be provided with felt dust-proof cushion 1-2 in gland 1-1 outer end, blocks dust etc. are to the pollution of high/low temperature stop-leak compound.
Four, large piston 6-1 and valve piston 6-5 is relied on to link together the booster pump formed, make the pressure that booster cavity 1-7 keeps higher, after packing 1-8 weares and teares, the oil pressure of high/low temperature stop-leak compound can apply pressure to packing, make packing be in the state of the self-compensating pressure relying on high/low temperature stop-leak compound, keep good seal clearance.And the pressure of booster cavity 1-7 and oil pumper pressure keep positive correlation, namely during oil pumper oil pressure height, packing is tightlier convenient to sealing, and when oil pumper oil pressure is less, the more loose wearing and tearing of packing slow down, and increase the service life.Simultaneously, between packing 1-8 and oil-extractor polish-rod, segmentation is filled with crude oil or high/low temperature stop-leak compound, upper end is high/low temperature stop-leak compound, lower end is crude oil, bonding surface may change, but remains obvious shorter in section (bonding surface) because the two is immiscible, plays good sealing and lubrication, duty is improved, packing life.
Five, because high/low temperature stop-leak compound has good lubricity, and viscosity stabilization, about 1800PaS, thus leaks few.Preferentially select 7905-3 high/low temperature oil resistant stop-leak compound.
Six, packing mechanism is unloaded: by ejecting the mixture injecting steel ball and lubricating grease in the 1-10 of chamber with certain pressure to dismounting.The diameter of steel ball preferentially selects 8 millimeters, due to the effect of lubricating grease, frictional force between steel ball and between other component of steel ball and packing box is minimum, steel ball can not pass from the gap between packing box component again, under impressed pressure and follow-up steel ball thrust, the mixture of steel ball and lubricating grease upwards pushes up dismantling ejector sleeve 1-9, skids off packing box along oil-extractor polish-rod 3, dismounting ejector sleeve 1-9 top packing 1-8 etc. is also ejected oil extractor packing box simultaneously.
Further embodiment, packing box only arranges pressurize and hermetically-sealed construction, bearing (radial support) mechanism is not set, the sealing mechanism of packing box is connected with adopting radial compliance between well head, the movement locus oneself had along with polished rod looks for RC function, thus reduce the inconsistent of packing box center seal and polished rod center as far as possible to greatest extent, both improve sealing effectiveness, slow down again the wearing and tearing of potted component.An embodiment as shown in Figure 3, packing box flexible connecting seat 10, by oil high-pressure hose 8, be arranged on the well head flexible connecting seat 7 that coordinates with oil pumper, eliminate the impact of bias between oil pumping machine well head and oil-extractor polish-rod 3 and inclination, thus make between packing box 1 and oil-extractor polish-rod 3, even to there is not strength that is eccentric and that tilt to interfere; This flexible structure can also eliminate the infringement of oil pumper vibrations to packing box sealing effectiveness, and the bias causing position between oil pumping machine well head and oil-extractor polish-rod to change to cause due to aforementioned vibrations and the infringement of inclination to packing box sealing effectiveness.
Another embodiment: high/low temperature stop-leak compound supplementary device is set, to supplement the high/low temperature stop-leak compound loss along with working time loss, ensure that the high/low temperature stop-leak compound quantity used is in a scope, this scope makes economy and sealing effectiveness, the close the best of oil-extractor polish-rod friction loss.High/low temperature stop-leak compound supplementary device is preferentially arranged on the position be connected with absorbing cavity 1-4.
Another embodiment again, packing adopts high-abrasive material to make.
Further preferential embodiment, packing adopts high tenacity, wear-resisting, elastomeric macromolecular material.
Outer end and the inner of booster pump absorbing cavity 1-4 are provided with potted component simultaneously: external seal 1-3 and interiorly seal 1-5, further embodiment, potted component adopts and is inlaid with flexible member, sealing force can be provided, size after the sealing surface wear of compensation sealing element changes, and reduces wear on the impact of sealing effectiveness.
Packing box sealing device disclosed in the utility model, the sealing performance being also applicable to other piston rod is improved and ensures.
Flexibly connecting between well head and packing box, other can compensate the element of bias and inclination also can to adopt expansion joint, bellows etc.Arrange band to slide or the support of rolling bearing supports and limits packing box, when making oil-extractor polish-rod 3 change the direction of motion, packing box 1 to flexibly connect and the amplitude that moves up and down that occurs is enough little, to extend the application life of packing box and packing because adopting.
In preferential embodiment, to the lower surface region of condensation of water vapor 1-12 with the large piston 6-1 be attached thereto, supporting good anti-cold measure.
Claims (10)
1. an oil extractor packing box sealing device, comprises packing box, leak fluid reclaims cycling mechanism, packing; Oil-extractor polish-rod passes from packing box, and packing box is provided with packing box housing, interior sealing, gland, and packing is contained between packing box housing and oil-extractor polish-rod; It is characterized in that being provided with leak fluid reclaims cycling mechanism, leak fluid reclaims cycling mechanism and is provided with booster pump, absorbing cavity, booster cavity, absorbing cavity is located at the top of the interior sealing in packing box housing, booster cavity is located at the below of the interior sealing in packing box housing, thus leak fluid recovery cycling mechanism and packing box are coupled together.
2. oil extractor packing box sealing device as claimed in claim 1, is characterized in that below the booster cavity that described packing is arranged in packing box housing.
3. oil extractor packing box sealing device as claimed in claim 1, it is characterized in that described packing box is also provided with oil pressure induction cavity, the booster pump that described leak fluid reclaims cycling mechanism comprises large piston, back-moving spring, breather valve, valve piston, and large piston lower surface is communicated with oil pressure induction cavity.
4. oil extractor packing box sealing device as claimed in claim 1 or 2, is characterized in that between packing box and oil-extractor polish-rod, booster cavity fills consumption fluid.
5. oil extractor packing box sealing device as claimed in claim 4, is characterized in that described consumption fluid is high/low temperature stop-leak compound.
6. oil extractor packing box sealing device as claimed in claim 1 or 2, is also provided with external seal and cohesion chamber outside the absorbing cavity that it is characterized in that described packing box.
7. oil extractor packing box sealing device as claimed in claim 1, it is characterized in that also being provided with sealing positioning sleeve in described packing box, gap between sealing positioning sleeve and oil-extractor polish-rod is very little, is ensureing that under the prerequisite that easy slide between sealing positioning sleeve and oil-extractor polish-rod, friction power loss are little, aforementioned gap is close to zero; And seal the endoporus of positioning sleeve and between the surface that on packing box, other coordinates with oil-extractor polish-rod, keep accurate coaxial precision.
8. oil extractor packing box sealing device as claimed in claim 1, is characterized in that being provided with and unloads packing mechanism, and by dismounting ejector sleeve, dismounting ejects chamber and forms; The inner hole sleeve of dismounting ejector sleeve is at oil-extractor polish-rod, and upper end cylindrical is contained in packing box housing bore, forms dismounting eject chamber with packing box housing.
9. oil extractor packing box sealing device as claimed in claim 1, is characterized in that being provided with eccentric and inclination eliminating machine, and eccentric and inclination eliminating machine comprises: the correction of two sphere centering body, Internal Spherical Surface seat, Internal Spherical Surface pressed seat.
10. oil extractor packing box sealing device as claimed in claim 1, is characterized in that being provided with eccentric and inclination eliminating machine, and eccentric and inclination eliminating machine is flexibly connecting between packing box and well head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320779612.6U CN204627496U (en) | 2013-11-24 | 2013-11-24 | A kind of oil extractor packing box sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320779612.6U CN204627496U (en) | 2013-11-24 | 2013-11-24 | A kind of oil extractor packing box sealing device |
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| Publication Number | Publication Date |
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| CN204627496U true CN204627496U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320779612.6U Expired - Fee Related CN204627496U (en) | 2013-11-24 | 2013-11-24 | A kind of oil extractor packing box sealing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489839A (en) * | 2018-05-29 | 2018-09-04 | 辽宁众森装备制造有限公司 | Packing wear condition monitoring device |
| CN110374539A (en) * | 2019-09-03 | 2019-10-25 | 寰宇瀚天(北京)石油设备科技有限公司 | A kind of polished rod of pumping well protector |
| CN114059952A (en) * | 2021-10-26 | 2022-02-18 | 桂林航天工业学院 | Spherical polish rod sealing device |
| CN108489839B (en) * | 2018-05-29 | 2024-04-26 | 辽宁众森装备制造有限公司 | Packing wearing state monitoring device |
-
2013
- 2013-11-24 CN CN201320779612.6U patent/CN204627496U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489839A (en) * | 2018-05-29 | 2018-09-04 | 辽宁众森装备制造有限公司 | Packing wear condition monitoring device |
| CN108489839B (en) * | 2018-05-29 | 2024-04-26 | 辽宁众森装备制造有限公司 | Packing wearing state monitoring device |
| CN110374539A (en) * | 2019-09-03 | 2019-10-25 | 寰宇瀚天(北京)石油设备科技有限公司 | A kind of polished rod of pumping well protector |
| CN114059952A (en) * | 2021-10-26 | 2022-02-18 | 桂林航天工业学院 | Spherical polish rod sealing device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20161124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |