CN202531541U - Underwater vertical butt-joint buffer descent controller for ocean structure - Google Patents
Underwater vertical butt-joint buffer descent controller for ocean structure Download PDFInfo
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- CN202531541U CN202531541U CN2012200403564U CN201220040356U CN202531541U CN 202531541 U CN202531541 U CN 202531541U CN 2012200403564 U CN2012200403564 U CN 2012200403564U CN 201220040356 U CN201220040356 U CN 201220040356U CN 202531541 U CN202531541 U CN 202531541U
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- butt joint
- cushion dashpot
- buffering
- confined pressure
- buffer
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Abstract
The utility model relates to an underwater vertical butt-joint buffer descent controller for an ocean structure. The underwater vertical butt-joint buffer descent controller comprises a matched butt-joint head, a butt-joint buffer rod component and a confining pressure buffer cylinder component. The underwater vertical butt-joint buffer descent controller is characterized in that a rod body in the butt-joint buffer rod component adopts a hollow structure, one end of the rod body is connected with a buffer butt-joint head, and the other end of the rod body is connected with a piston; one end of a buffer cylinder in the confining pressure buffer cylinder component has a through hole which is in sliding fit with the rod body, and the other end of the buffer cylinder has a seal structure; and the piston in the butt-joint buffer rod component is in sliding fit with the buffer cylinder in the confining pressure buffer cylinder component. The underwater vertical butt-joint buffer descent controller has the outstanding advantages of being simple in structure, reliable in buffer descent control, automatic to reset, controllable in buffer deformation curve and the like, and is particularly suitable for the underwater vertical butt joint of the large-scale ocean structure.
Description
Technical field
The invention belongs to the ocean engineering field, particularly a kind of marine structure crashproof descent control installation of vertical docking operation under water that is used for.
Background technique
When marine structure at sea vertically docked, because the influence of sea windward and wave, in the process of butt joint, all there was vibration inevitably in offshore structures two splits up and down; Huge because of volume, the weight of offshore structures again, this vibration causes producing huge striking force in the offshore structures docking operation, thereby offshore structures is caused damage.For avoiding the generation of this situation, dock the necessary held stationary of collision process between offshore structures two splits, this just needs the butt joint damping device of a cover special use alleviate the impact in the docking operation.
Conventional marine anti-collision equipment mainly is to adopt elastomer to absorb Impact energy, but the crashproof member of these elasticity can't remove after accomplishing butt joint, destroys being rigidly connected of structure.Marine also have floating dress method that large-scale upper component is installed, and what adopted the centre is the sandbox buffering, after the installation sand emitted the rigidity contact that realizes the up-down structure thing, and the buffering energy-absorbing ability is lower, and need manual intervention afterwards.(soft landing system for mounting aero-generator at sea ZL200910050458.7), has adopted the gas-liquid accumulator to the descent control installation of the marine installation of wind-powered electricity generation in addition usefulness, relatively is suitable for installation waterborne, is used for installing under water then having inconvenience.
Summary of the invention
The object of the invention provides a kind of marine structure vertically butt joint buffering descent control installation under water that is used for, and solves the sharp impacts problem in the marine structure docking operation in the existing technology, makes and realizes steadily butt joint between the end-to-end joint.
The present invention realizes through following technological scheme:
Marine structure is vertically butt joint buffering descent control installation under water; Comprise and cooperate butt joint, butt joint buffer bar assembly, confined pressure cushion dashpot assembly; It is characterized in that: the body of rod in the butt joint buffer bar assembly adopts hollow structure, and the one of which end connects the buffering butt joint, and the other end connects piston; Cushion dashpot one end in the confined pressure cushion dashpot assembly is provided with the through hole that is slidingly matched with the body of rod, and the other end is an enclosed construction; Piston in the butt joint buffer bar assembly and the cushion dashpot in the confined pressure cushion dashpot assembly form and are slidingly matched.
Also comprise in the such scheme: the cushion dashpot enclosed construction end in confined pressure cushion dashpot assembly is provided with and adds deep trouth, circumferentially is distributed with the inside and outside through hole of a plurality of connection cushion dashpots along adding deep trouth; One or several confined pressure shock absorbers of packing in cushion dashpot inside; Described confined pressure shock absorber is air bag and/or the elastomer of buoyancy greater than own wt.
The through hole that is arranged on cushion dashpot enclosed construction end comprises at least one water inlet and several weep holes, and one-way valve is set in the water inlet.
Cooperate butt joint and buffering butt joint butt joint fit system to cooperate, and be not limited to surface of contact and fit like a glove for public head, female; Piston closes structure end butt joint fit system with the buffering potting and cooperates for public head, female head, and is not limited to surface of contact and fits like a glove; Public head and female head comprise cambered surface or the conical surface, incline plane type.
The sliding contact surface of cushion dashpot and piston is provided with corrosion-inhibiting coating, adopts Spielpassung therebetween or do not have the gap to cooperate.
Working principle of the present invention is following:
When the plan butt joint split that connects confined pressure cushion dashpot assembly is sunk to when marine; Seawater gets in the cushion dashpot chamber through through hole; Butt joint buffer bar assembly progressively leans out under gravity and buoyancy synergy until reaching piston rod maximum travel position place, after this just can carry out the split butt joint of offshore structures.When two splits of offshore structures are docked, cooperate butt joint and buffering butt joint to bump, butt joint buffer bar assembly bounces back; Cushion dashpot chamber internal water pressure is risen; The confined pressure shock absorber shrinks under the effect of water pressure around, absorbs energy, produces cushioning effect; When the confined pressure shock absorber adopts the air bag group of high-elastic solid material of unlike material and different inflation pressures fashionable, will be corresponding to different amount of recovery-mechanical characteristic curve; Simultaneously, the cylinder maritime interior waters slowly flows out through through hole (or matching gap of cushion dashpot and piston), discharges little pressure.Time of collision is very short, and after collision finished, the confined pressure shock absorber expanded, and butt joint buffer bar assembly is in cushion dashpot cavity pressure and self gravitation thereof, buoyancy acting in conjunction generation homing action or trend down, keeps and cooperates contacting of butt joint.Relative movement causes stressed variation between cooperation butt joint and buffering butt joint between two splits of the marine structure under wind wave action in the butt joint; The confined pressure shock absorber is breathing and the lasting compensating action that produces thereupon, and two splits are kept contact through device of the present invention up and down.Continue to transfer the top split in the butt joint; This minute, body weight progressively was applied on the liquid and confined pressure shock absorber in the cushion dashpot through butt joint buffer bar assembly; Cause sea opening and continue earial drainage; Be located in the split of bottom until slow the falling of top split, the cushion dashpot cavity pressure also reaches and the external water pressure balance after a while, and the elasticity of confined pressure shock absorber also no longer produces active force to two butt joint splits.Butt joint is so far accomplished in offshore structures two splits.The buffering butt joint can realize automatic centering through public head, female head dummy structural design with the cooperation butt joint, also can ensure the accuracy of underwater mating.
The present invention also can be used for the occasion of interface more than the water surface, as adopts floating dress method to install and fix the Texas deck chunk of jacket platform, only requires this moment cushion dashpot and confined pressure shock absorber not in water, to cushion butt joint and surfaces.
The present invention has following advantage:
(1) to the offshore structures vertically characteristics of butt joint design under water, simple in structure, be prone to match with marine structure to be docked and realize aligning automatically.
(2) utilize the medium of environment water, not only need not strict control cushion dashpot sealability, also fundamentally eliminated the issuable oil impregnate of traditional gas-liquid energy-storage type damping device and polluted as propagation of pressure.
(3) confined pressure shock absorber breathing under the effect of liquid uniform pressure around directly is not collided, and is difficult for impairedly, and selection is convenient, long service life.
(4) whether the confined pressure shock absorber is fixed arbitrarily and is selected; Material, size, quantity etc. can be according to the demand random combination; Particularly bladder-type confined pressure shock absorber can be regulated cushion modulus and excursion thereof through different preliminary filling pressure; Cushion stroke is big, and buffer bar assembly dilatation and stressed relation curve almost can arbitrarily design, and crashproof adaptive capacity is strong.
(5) existence of through hole has guaranteed that butt joint falls in the slow of two splits up and down, and need not to control specially and intervene.
(6) realize leaning out automatically of buffer bar assembly through gravity and buoyancy, can realize automatically reseting after any butt joint that does not once reach purpose is attempted, guaranteed to need not in the underwater mating process manual control and adjustment device of the present invention, improved operation on the sea efficient.
(7) the confined pressure shock absorber is directly installed in the cushion dashpot, need not cushion pipeline, and buffering reaction is sensitive.
Description of drawings
Fig. 1 is the structural representation sectional drawing (before the butt joint) of an embodiment of the present invention;
Fig. 2 is the structural representation sectional drawing (after the butt joint completion) of an embodiment of the present invention;
Fig. 3 is jack-up unit docks embodiment with underwater storage tank a schematic representation;
Fig. 4 is heavy pile and the schematic representation that docks embodiment of original underwater foundation
Among the figure: 1-cooperates butt joint, 2-butt joint buffer bar assembly, 3-confined pressure cushion dashpot assembly, 4-cylinder cap, the butt joint of 5-buffering, 6-piston, 7-cushion dashpot, 8-water inlet, 9-weep hole, 10-confined pressure shock absorber, 11-water inlet one-way valve, 12-jack-up unit, 13-underwater oil storage tank, the heavy pile of 14-, 15-underwater foundation.
Embodiment
Down in the face of combining accompanying drawing that its technological scheme is carried out comprehensive description:
Marine structure vertically butt joint buffering descent control installation under water comprises cooperation butt joint 1, butt joint buffer bar assembly 2, confined pressure cushion dashpot assembly 3.Butt joint buffer bar assembly 2 comprises buffering butt joint 5, the piston 6 that links together; Confined pressure cushion dashpot assembly 3 comprises cushion dashpot 7, cylinder cap 4 and confined pressure shock absorber 10. cushion dashpots 7 inside one or several confined pressure shock absorbers 10 of packing into; Cushion dashpot 7 inner carrier strokes shrink spacing closed end existence and add deep trouth (being cavity).Cooperate butt joint 1 to be connected with two splits up and down of the marine structure of intending butt joint respectively with confined pressure cushion dashpot assembly 3, butt joint buffer bar assembly 2 is slidingly connected with confined pressure cushion dashpot assembly 3.
Described cooperation butt joint 1 links together with intending a split of docking, and also can be the component part of this split itself; Similar therewith, described confined pressure cushion dashpot assembly 3 links together with intending another split of docking, and also can be the component part of this split.
Described cooperation butt joint 1 matches with buffering butt joint 5 in shape, and typical fit system is that public head, female head cooperate.
When the interface of described cooperation butt joint 1 down, the interface of described buffering butt joint 5 is up the time, described butt joint buffer bar assembly 2 is provided with internal cavities or sets up auxiliary come-up member, require its suffered buoyancy greater than its gravity to realize from resetting; Then require described butt joint buffer bar assembly 2 gravity to realize from resetting when the mounting point is opposite greater than its suffered buoyancy.
Described confined pressure shock absorber 10 is high-elastic solid material or air bag.When confined pressure shock absorber during, can be the combination in any of the air bag of high-elastic solid material and different inflation pressures more than 1.These confined pressure shock absorbers both can be fixed on the cushion dashpot inner carrier position that is beyond one's reach, and also can not fix and let alone to float.
Adopt Spielpassung between described cushion dashpot 7, piston 6 its sliding contact surfaces, fitting surface is not strict with leakage proof, can not take seal approach.When apparatus of the present invention needed long-term or repeated application, described cushion dashpot 7, piston 6 need carry out effectively anticorrosion or directly adopt anti-corrosion material to make.
Described cushion dashpot 7 closed ends generally are provided with one or some through holes 9, but bigger when gap between piston 6 and the cushion dashpot 7, are enough to replace through hole 9 to realize the inside and outside water body of cushion dashpots when speed exchanges on request, also can cancel through hole.Can reset rapidly automatically simultaneously and to ensure slow the falling of preliminary butt joint superior posterior split in order to dock buffer bar assembly 2, the water inlet that has control valve 8 of the big area of passage of operated by rotary motion, this control valve recommends to adopt one-way valve.
The size of said each member is all confirmed according to the quality of offshore structures, the size of buffering course acceleration, the time and the distance of buffering.The offshore structures that the cushion stroke of cushion dashpot cavity and butt joint buffer bar causes based on real-time wave height when butt joint axially on the amplitude setting of vibration.
Provided detailed mode of execution and concrete operating process below in conjunction with embodiment, but protection scope of the present invention is not limited to following embodiment.
Like Fig. 1, shown in 2 and 3, present embodiment is applied to the construction of docking of jack-up unit and underwater oil storage tank for the butt joint damping device.Comprise: cooperate butt joint 1, butt joint buffer bar assembly 2, confined pressure cushion dashpot assembly 3, cylinder cap 4, buffering butt joint 5, piston 6, cushion dashpot 7, water inlet 8, weep hole 9, confined pressure shock absorber 10, water inlet one-way valve 11, jack-up unit 12, underwater oil storage tank 13.The jack-up unit deadweight is 6000 tonnes (offshore structure for greater or lesser also adapts to), maximum heave 1m under the wave action, and no damp impacts power calculated value maximum is near 30000kN.The confined pressure shock absorber that design is this time adopted is air bag and solid silicon blob of viscose, and air bag inside charges into the nitrogen that atmospheric pressure value is 0.1-1.6 MPa.Cushion dashpot internal diameter 3m, range 2m establishes the water inlet 8 of 1 DN300 and sets the weep hole 9 of 11,4 latus rectums 100 of individual event inlet valve.Striking force is reduced to 5000kN after adopting the present invention.
During practical implementation, will cooperate butt joint 1 to be installed in each spud leg bottom of jack-up unit earlier, the butt joint cushion dashpot assembly 3 of 3 cover prepackage butt joint buffer bar assemblies 2 is installed in the underwater oil storage tank top.Underwater oil storage tank sinks in the process of seabed; Seawater gets in cushion dashpot 7 chambeies through water inlet 8, water inlet one-way valve 11; Because it is hollow that butt joint buffer bar assembly 2 and air bag are, and big buoyancy is provided, butt joint buffer bar assembly 2 overcomes the self gravitation effect and floats to the spacing maximum extend stroke of the piston rod position of cylinder cap 4 under the floating function of seawater; After underwater oil storage tank was in place, jack-up unit was displaced downwardly to sea above the split in that tugboat is auxiliary.Test after the spud leg rough alignment of jack-up unit; Whole flat is rocked under the wave effect, cooperates butt joint 1 and buffering butt joint 5 to bump, and piston and piston rod 6 press down; Cushion dashpot 7 chamber maritime interior waters pressure rise; Air bag and silica gel piece (confined pressure shock absorber 10) are compressed, and absorb energy, play buffer function; Simultaneously, a small amount of seawater flows out through weep hole 9 in the cylinder, and platform continues in jolting, to transfer spud leg; Butt joint 5 has taken place no longer to separate after the collision several times with buffering to cooperate butt joint 1; Butt joint buffer bar assembly 2 breathing with the air bag in cushion dashpot 7 chambeies and silica gel piece in this process changes accurate synchronization telescope, along with platform leg continue transfer, dock the 2 non-linear lasting contractions of buffer bar assembly; Air bag and silica gel piece compress synchronously in cushion dashpot 7 chambeies; The chamber maritime interior waters gushes through weep hole 9, finally cushions on the supporting leg that butt joint 1 is seated in the platform lower body, and hydraulic pressure is identical with external environment hydraulic pressure and air bag and silica gel piece progressively rebound in cushion dashpot 7 chambeies.
Embodiment 2
Like Fig. 1, shown in 2 and 4, present embodiment is applied to heavy pile and original the docking in the construction of basis down of water for the butt joint damping device.Comprise: cooperate butt joint 1, butt joint buffer bar assembly 2, confined pressure cushion dashpot assembly 3, cylinder cap 4, buffering butt joint 5, piston 6, cushion dashpot 7, weep hole 9, confined pressure shock absorber 10, heavy pile 14, underwater foundation 15.The confined pressure shock absorber of this time using 10 is the hollow rubber ball of diameter 5-20 cm, and inside charges into the air that atmospheric pressure value is 0.1-0.6 MPa.Cushion dashpot 7 is directly used a segment structure of heavy pile.
During practical implementation and embodiment 1 basic identical, but comprise the following main distinction: (1) is not provided with special-purpose water inlet 8 and supporting water inlet one-way valve 11 thereof; (2) cooperate butt joint 1 cushioning butt joint 5 last down, greater than its buoyancy, gravity is butt joint buffer bar assembly reposition force to buffering to extension bar assembly weight; (3) cushion dashpot 7 utilizes a heavy pile cylinder part as cylinder body, belongs to disposable use; (4) heavy pile cylinder weight is lower.
Marine structure vertically butt joint buffering descent control installation under water comprises cooperation butt joint, butt joint buffer bar assembly, confined pressure cushion dashpot assembly.Butt joint buffer bar assembly comprises link together buffering butt joint, piston rod and piston; Confined pressure cushion dashpot assembly comprises cushion dashpot, cylinder cap and confined pressure shock absorber, cushion dashpot inside one or several confined pressure shock absorbers of packing into; Cushion dashpot inner carrier stroke shrinks the spacing outer cavity that exists.Cooperate butt joint to be connected with two splits up and down of the marine structure of intending butt joint respectively with confined pressure cushion dashpot assembly, butt joint buffer bar assembly and confined pressure cushion dashpot assembly are slidingly connected.
Described cooperation butt joint links together with intending a split of docking, and also can be the component part of this split itself; Similar therewith, described confined pressure cushion dashpot assembly links together with intending another split of docking, and also can be the component part of this split.
Described cooperation butt joint matches with the buffering butt joint in shape, and typical fit system is that public head, female head cooperate.
When the interface of described cooperation butt joint down, the interface of described buffering butt joint is up the time, described butt joint buffer bar assembly is provided with internal cavities or sets up auxiliary come-up member, require its suffered buoyancy greater than its gravity to realize from resetting; Then require described butt joint buffer bar assembly gravity to realize from resetting when the mounting point is opposite greater than its suffered buoyancy.
Described confined pressure shock absorber is high-elastic solid material or air bag.When confined pressure shock absorber during, can be the combination in any of the air bag of high-elastic solid material and different inflation pressures more than 1.These confined pressure shock absorbers both can be fixed on the cushion dashpot inner carrier position that is beyond one's reach, and also can not fix and let alone to float.
Adopt Spielpassung between described cushion dashpot, piston rod, its sliding contact surface of piston, fitting surface is not strict with leakage proof, can not take seal approach.When apparatus of the present invention needed long-term or repeated application, described cushion dashpot, piston rod, piston need carry out effectively anticorrosion or directly adopt anti-corrosion material to make.
Described cushion dashpot generally is provided with one or some sea openings, but bigger when gap between piston and the cushion dashpot, is enough to replace sea opening to realize that the inside and outside water body of cushion dashpot on request during the speed exchange, also can cancel sea opening.Can reset rapidly automatically simultaneously and to ensure slow the falling of preliminary butt joint superior posterior split in order to dock the buffer bar assembly, the water inlet sea opening that has control valve of the big area of passage of operated by rotary motion, this control valve recommend to adopt one-way valve.
The size of said each member is all confirmed according to the quality of offshore structures, the size of buffering course acceleration, the time and the distance of buffering.The offshore structures that the cushion stroke of cushion dashpot cavity and butt joint buffer bar causes based on real-time wave height when butt joint axially on the amplitude setting of vibration.
Claims (5)
1. marine structure vertically docks the buffering descent control installation under water; Comprise and cooperate butt joint (1), butt joint buffer bar assembly (2), confined pressure cushion dashpot assembly (3); It is characterized in that: the body of rod in the butt joint buffer bar assembly (2) adopts hollow structure; The one of which end connects buffering butt joint (5), and the other end connects piston (6); Cushion dashpot (7) one ends in the confined pressure cushion dashpot assembly (3) are provided with the through hole that is slidingly matched with the body of rod, and the other end is an enclosed construction; Piston in the butt joint buffer bar assembly (2) and the cushion dashpot (7) in the confined pressure cushion dashpot assembly (3) form and are slidingly matched.
2. marine structure according to claim 1 is vertically butt joint buffering descent control installation under water; It is characterized in that cushion dashpot (7) enclosed construction end in confined pressure cushion dashpot assembly (3) is provided with adds deep trouth, circumferentially is distributed with the inside and outside through hole of a plurality of connection cushion dashpots along adding deep trouth; One or several confined pressure shock absorbers (10) of packing in cushion dashpot (7) inside; Described confined pressure shock absorber (10) is air bag and/or the elastomer of buoyancy greater than own wt.
3. marine structure according to claim 2 is vertically butt joint buffering descent control installation under water; It is characterized in that the through hole that is arranged on cushion dashpot (7) enclosed construction end comprises at least one water inlet (8) and several weep holes (9), is provided with one-way valve (11) in water inlet (8).
4. based on claim 1,2 or 3 described marine structures vertical butt joint buffering slow descending device under water, it is characterized in that cooperating butt joint (1) and buffering butt joint (5) butt joint fit system to cooperate, and be not limited to contact-making surface and fit like a glove for public head, female; Piston (6) and cushion dashpot (7) enclosed construction end butt joint fit system be public head, female head cooperation, and is not limited to contact-making surface and fits like a glove; Public head and female head comprise cambered surface or the conical surface, incline plane type.
5. vertically dock the buffering descent control installation under water according to claim 2 or 3 described marine structures, it is characterized in that the cushion dashpot (7) and the sliding contact surface of piston (6) are provided with corrosion-inhibiting coating, adopt Spielpassung therebetween or do not have the gap to cooperate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200403564U CN202531541U (en) | 2012-02-08 | 2012-02-08 | Underwater vertical butt-joint buffer descent controller for ocean structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200403564U CN202531541U (en) | 2012-02-08 | 2012-02-08 | Underwater vertical butt-joint buffer descent controller for ocean structure |
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| Publication Number | Publication Date |
|---|---|
| CN202531541U true CN202531541U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200403564U Expired - Fee Related CN202531541U (en) | 2012-02-08 | 2012-02-08 | Underwater vertical butt-joint buffer descent controller for ocean structure |
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| CN (1) | CN202531541U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244506A (en) * | 2012-02-08 | 2013-08-14 | 中国石油化工股份有限公司 | Ocean structure underwater vertical butt joint buffer and slow descending device |
| WO2018115254A1 (en) * | 2016-12-22 | 2018-06-28 | Vetco Gray Scandinavia As | A damper for absorbing shock generated upon docking a moving structure with a stationary structure or foundation |
-
2012
- 2012-02-08 CN CN2012200403564U patent/CN202531541U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244506A (en) * | 2012-02-08 | 2013-08-14 | 中国石油化工股份有限公司 | Ocean structure underwater vertical butt joint buffer and slow descending device |
| WO2018115254A1 (en) * | 2016-12-22 | 2018-06-28 | Vetco Gray Scandinavia As | A damper for absorbing shock generated upon docking a moving structure with a stationary structure or foundation |
| AU2017382926B2 (en) * | 2016-12-22 | 2019-08-15 | Vetco Gray Scandinavia As | A damper for absorbing shock generated upon docking a moving structure with a stationary structure or foundation |
| GB2573682A (en) * | 2016-12-22 | 2019-11-13 | Vetco Gray Scandinavia As | A damper for absorbing shock generated upon docking a moving structure with a stationary structure or foundation |
| US10995465B2 (en) * | 2016-12-22 | 2021-05-04 | Vetco Gray Scandinavia As | Damper for absorbing shock generated upon docking a moving structure with a stationary structure or foundation |
| GB2573682B (en) * | 2016-12-22 | 2021-05-26 | Vetco Gray Scandinavia As | A damper for absorbing shock generated upon docking a moving structure with a stationary structure or foundation |
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Effective date of registration: 20151029 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee after: Sinopec Corp. Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: Sinopec Corp. Patentee before: Well-Drilling Technology Inst., Shengli Petroleum Administration, SINOPEC |
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Granted publication date: 20121114 Termination date: 20210208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |