CN203114282U - Underground mud positive pulse generator - Google Patents
Underground mud positive pulse generator Download PDFInfo
- Publication number
- CN203114282U CN203114282U CN 201220729672 CN201220729672U CN203114282U CN 203114282 U CN203114282 U CN 203114282U CN 201220729672 CN201220729672 CN 201220729672 CN 201220729672 U CN201220729672 U CN 201220729672U CN 203114282 U CN203114282 U CN 203114282U
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- mud
- positive pulse
- main shaft
- power piston
- pulse generator
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Abstract
The utility model relates to an underground mud positive pulse generator. The underground mud positive pulse generator comprises a mud pressure generating component and a mud positive pulse converting component which is used for converting mud pressure into mud positive pulse, wherein the mud pressure generating component comprises a shell, a main valve base, a main shaft and a main valve core, wherein the main valve base is arranged on the inner wall of the shell; the main shaft is arranged in the shell and can axially move along the axial direction of the shell; the main valve core is sleeved on the main shaft and corresponds to the position of the main valve base; the shell comprises a mud inlet and a mud outlet; the mud inlet is communicated with the mud outlet through the main valve core; an axial through hole penetrating through the axial direction of the main shaft is formed in the axial direction of the main shaft; the top of the axial through hole is communicated with the mud inlet; and the mud positive pulse converting component resists against the bottom of the axial through hole. The utility model provides the underground mud positive pulse generator which is reliable in work and can be used for a wireless while drilling system to generate a mud pulse signal.
Description
Technical field
The utility model belongs to oil measurement while drilling field, relates to a kind of mud pulse generator, relates in particular to a kind of down-hole slurry positive pulse generator by mud wave transmission shaft bottom measuring-signal.
Background technology
The oil well logging during is to utilize the instrument that is installed in the drill collar to record drilling parameter and formation parameter, and in time adjusts bit course according to these parameters, makes it to creep into along the target zone direction.Because the formation parameter that well logging during obtains near the reset condition on stratum, more is conducive to oil-containing, gas evaluation to bad ground.The well logging during instrument is placed in the non magnetic drill collar, can measure orientation parameter (hole deviation, orientation, tool face azimuth), formation parameter (gamma, resistivity, the velocity of sound, neutron porosity, density etc.) and drilling parameter (the pressure of the drill, moment of torsion, rotating speed, annular pressure etc.) etc.The signal transmission form of well logging during is divided into wired and wireless two kinds, and wire transmission comprises: cable transmission, extraordinary drill pipe transmission and optical fibre transmission etc., wireless transmission comprises: mud-pulse, electromagnetic wave, sound wave etc.Mud-pulse can be used for deep-well and development cost is lower, makes mud-pulse become the transmission means that extensively adopts at present.
Mud pulse generator can be divided into by its operating principle as the core of well logging during: positive pulse, negative pulse and continuous wave impulse generator.Negative pulse is because serious to shaft lining breakage, the complex structure of downhole probe, and assembling, Operation and maintenance inconvenience are seldom used.The advantage of continuous wave pulse is that transmission speed is fast, but its signal relatively a little less than, it is relatively large influenced by noise, and signal processing system is had relatively high expectations.Mud positive pulse generator uses the most general, it is that measured parameter is encoded, servo valve by its control mud pulse generator, when being encoded to " 1 ", move on the servo valve, make the mud throttling produce back pressure, pressure sensor by standpipe can detect a positive pressure pulse, when being encoded to " 0 ", servo valve resets, and mud pressure is down to normally.Ground installation is by reading the parameter that downhole instrument records to the decoding of standpipe pressure signal.
Mud pulse generator is the passage that the well logging during parameter uploads to ground, its reliability is most important, and existing mud pulse generator exists variety of problems, the electric virtual connections that under the underground vibrating environment, causes such as the pin hole connected mode, the balance oil sac is corroded or leakage of oil and cause the instrument internal pressure can not the balance down-hole pressure, excessive or the running speed of hole deviation is too fast to be caused instrument to take off key and causes the problem of no signal, and instrument can not be salvaged, and instrument is scrapped etc. when bit freezing occurring.
The utility model content
In order to solve the above-mentioned technical problem that exists in the background technology, the utility model provides a kind of reliable operation and can be used for the down-hole slurry positive pulse generator that the wireless drilling system produces the mud positive pulse signal.
Technical solution of the present utility model is: the utility model provides a kind of down-hole slurry positive pulse generator, and its special character is: described down-hole slurry positive pulse generator comprises mud pressure generation component and the mud positive pulse transition components that mud pressure is converted to mud positive pulse; Described mud pressure generation component comprises shell, be arranged on main valve seat on the outer casing inner wall, be arranged on enclosure and can and be sleeved on the main shaft and the main valve plug corresponding with the main valve seat position along the main shaft that axially moves axially of shell; Described shell comprises mud entrance and mud outlet; Described mud entrance connects by main valve plug and mud outlet; Axially being provided with of described main shaft connects the axial axially extending bore of main shaft; Top and the mud entrance of described axially extending bore connect; Described mud positive pulse transition components only leans against the bottom of axially extending bore.
Above-mentioned mud positive pulse transition components comprises protection tube, shell, is arranged on electromagnetic assembly, main spring and the power piston assembly of enclosure; The bottom of described main shaft is stretched in the shell, and described power piston assembly is threaded in axially and between the inwall of protection tube moving axially on the main shaft that stretches in the protection tube and along main shaft; Be provided with cavity between described power piston assembly and the electromagnetic assembly; Described main spring is sleeved on the main shaft and is arranged between power piston assembly and the electromagnetic assembly in the formed cavity; Described electromagnetic assembly only leans against the bottom of axially extending bore; Be provided with the slit between described main shaft and the protection tube; Described slit and mud outlet connect; Formed cavity connects by formed slit between power piston assembly and main shaft and the protection tube between described power piston assembly and the electromagnetic assembly; The bottom of described axially extending bore connects by formed cavity between electromagnetic assembly and power piston assembly and the electromagnetic assembly.
Above-mentioned power piston assembly upward direction vertically is subjected to the area of mud effect to be subjected to the area of mud effect vertically downwards at the main valve seat place greater than main valve plug.
Above-mentioned power piston assembly comprises piston cylinder, power piston and is arranged on overflow valve on the power piston that described power piston assembly overflow valve is arranged in pairs on the power piston.
Above-mentioned main shaft is provided with screw thread; Described power piston assembly is threaded on the main shaft; Described piston cylinder is fixed between protection tube and the electromagnetic valve housing; Formed cavity connects by formed slit between overflow valve and main shaft and the protection tube between described power piston assembly and the electromagnetic assembly.
Above-mentioned electromagnetic assembly comprises armature, around being arranged on the coil around the armature and acting on the armature and armature is carried out the reset assembly of power-off restoration; The front end face of described armature is bulb or arc; The front end face of described armature only leans against the bottom of axially extending bore.
Above-mentioned reset assembly comprises the dummy piston that is arranged on the armature front end and the spring that is arranged on the armature rear end; Be provided with cavity between described dummy piston and the armature; Be perfused with silicone oil or hydraulic oil in the described cavity.
Above-mentioned mud positive pulse transition components also comprises the lower house that is arranged on outer casing bottom and links to each other with shell; Sidewall on the described lower house is provided with differential pressure pickup; Be provided with the fluid passage between the formed cavity between described differential pressure pickup and dummy piston and the armature.
Above-mentioned down-hole slurry positive pulse generator also comprises the fishing head that is arranged on the main shaft top; The position that the top of described axially extending bore and mud entrance connect is provided with the mud filter screen.
Above-mentioned down-hole slurry positive pulse generator also comprises the combined seal ring that is used for can and drill collar inwall that is arranged on the shell; Described combined seal ring is one or multi-channel.
The utility model has the advantages that:
The utility model provides a kind of down-hole slurry positive pulse generator, is made up of filter screen, main valve, power piston, overflow valve, electromagnetic valve, differential pressure pick-up, aviation plug etc.The utility model is installed in the non magnetic drill collar, is fixed in the drill collar by pin, can salvage.High-pressure slurry propulsion power piston drives main valve and produces positive pressure pulse, and power piston is provided with overflow valve, can regulate the pressure amplitude that produces pulse.Electromagnetic valve is encapsulated in the confined space, and this confined space is full of silicone oil or hydraulic oil, by the pressure inside and outside the dummy piston balance instrument.Because the barrier effect of main valve plug, main valve top mud pressure is bigger, and high-pressure slurry is incorporated into the power piston bottom through hollow main shaft, the connection of this passage of solenoid control with close, when the electromagnetic valve adhesive, high-pressure slurry enters into the power piston bottom, and the propulsion power piston drives main valve head and moves upward, and produces the pressure positive pulse on main valve head top, after electromagnetic valve disconnects, the passage of high-pressure slurry is cut off, and main valve head is open under the effect of mud, and it is normal that the main valve head upper pressure is recovered.The amplitude of overflow valve controlled pressure pulse, the differential pressure pick-up of bottom judge whether the ground slush pump is opened, and then judge whether mud pulse generator can work.The bottom aviation plug is flexible coupling with following extension instrument, has avoided because the electric virtual connections that vibration causes.The utility model is simple in structure, energy consumption is low, reliable operation, be easy to safeguard, can be used for the wireless drilling system and produces the mud-pulse signal.
Description of drawings
Fig. 1 is the overall structure schematic diagram of down-hole slurry positive pulse generator provided by the utility model;
Wherein:
The 1-fishing head; The 2-screw; The 3-spindle drum; The 4-combined seal ring; The 5-main valve seat; The 6-main valve plug; The 7-shell; The 8-pin-and-hole; The 9-main shaft; The 10-stop pin; 11-protects tube; The 12-stationary magazine creel; 13-overflow valve screw; 14-overflow valve spring; The 15-main spring; The 16-power piston; 17-electromagnetic valve housing; 18-overflow valve steel ball; The 19-dummy piston; The 20-coil case; The 21-coil rack; The 22-electromagnetic valve coil; 23-armature; The 24-spring spindle; The 25-lower house; The 26-spring bearer plate; The 27-differential pressure pick-up; 28-electromagnetic valve spring; The 29-pressure ring; The 30-collar; 31-pressure-bearing plug; 32-oil is stifled; The 33-aviation plug; 34-anchor dish; The 35-helmet.
The specific embodiment
The utility model provides a kind of down-hole slurry positive pulse generator, and its special character is: the down-hole slurry positive pulse generator comprises mud pressure generation component and the mud positive pulse transition components that mud pressure is converted to mud positive pulse; The mud pressure generation component comprises shell 7, be arranged on main valve seat 5 on shell 7 inwalls, be arranged on shell 7 inside and can and be sleeved on the main shaft 9 and the main valve plug 6 corresponding with main valve seat 5 positions along the main shaft that axially moves axially 9 of shell 7; Shell 7 comprises mud entrance and mud outlet; Mud entrance connects by main valve plug 6 and mud outlet; Axially being provided with of main shaft 9 connects the axial axially extending bore of main shaft 9; Top and the mud entrance of axially extending bore connect; The mud positive pulse transition components only leans against the bottom of axially extending bore.Main valve seat 5 is arranged on the inwall of shell 7 by stationary magazine creel 12; Be provided with stop pin 10 between stationary magazine creel 12 and the shell 7.
The mud positive pulse transition components comprises protection tube 11, is arranged on electromagnetic assembly, main spring 15 and the power piston assembly of shell 7 inside; The bottom of main shaft 9 is stretched in the shell 7, and the power piston assembly is threaded in axially and between the inwall of protection tube 11 moving axially on the main shaft 9 that stretches in the protection tube 11 and along main shaft 9; Be provided with cavity between power piston assembly and the electromagnetic assembly; Main spring 15 is sleeved on the main shaft 9 and is arranged between power piston assembly and the electromagnetic assembly in the formed cavity; Electromagnetic assembly only leans against the bottom of axially extending bore; Be provided with the slit between main shaft 9 and the protection tube 11; Slit and mud outlet connect; Formed cavity connects by formed slit between power piston assembly and main shaft 9 and the protection tube 11 between power piston assembly and the electromagnetic assembly; The bottom of axially extending bore connects by formed cavity between electromagnetic assembly and power piston assembly and the electromagnetic assembly.
The power piston assembly comprises power piston and is arranged on overflow valve on the power piston that overflow valve is arranged in pairs on the power piston.
Electromagnetic assembly comprises armature 23, around being arranged on the coil around the armature 23 and acting on the armature 23 and armature 23 is carried out the reset assembly of power-off restoration; The front end face of armature 23 is bulb or arc; The front end face of armature 23 only leans against the bottom of axially extending bore.
Reset assembly comprises the dummy piston 19 that is arranged on armature 23 front ends and the spring that is arranged on armature 23 rear ends; Be provided with cavity between dummy piston 19 and the armature 23; Be perfused with silicone oil or hydraulic oil in the cavity.
The mud positive pulse transition components also comprises the lower house 25 that is arranged on shell 7 bottoms and links to each other with shell 7; Sidewall on the lower house 25 is provided with differential pressure pick-up 27; Be provided with the fluid passage between the formed cavity between differential pressure pick-up 27 and dummy piston 19 and the armature 23.Electromagnetic valve spring 28 is by collar 30 restrictive axial positions, and lower house 25 is provided with for the fixing pressure ring 29 of pressure-bearing plug 31.
The down-hole slurry positive pulse generator also comprises the fishing head 1 that is arranged on main shaft 9 tops; The position that the top of axially extending bore and mud entrance connect is provided with the mud filter screen.
The down-hole slurry positive pulse generator also comprises the combined seal ring 4 that is used for can 7 and drill collar inwall that is arranged on the shell 7; Combined seal ring 4 is one or multi-channel.
As shown in Figure 1, mud positive pulse generator provided by the utility model mainly is made up of mud filter screen 1, main valve seat 5, main valve plug 6, power piston 16, overflow valve 13-14-18, electromagnetic valve 17-20-21-22-23, differential pressure pick-up 27, aviation plug 33 etc.The utility model is installed in the non magnetic drill collar, and 8 places are fixed in the drill collar by pin at pin-and-hole, lifts by fishing head during bit freezing, instrument can be taken out safely after pin is cut off.Mud filter screen 1 is by being threaded on the spindle drum 3, and spindle drum 3 and shell 7 are fixing by screw 2, are sealed by combined seal ring 4 between mud pulse generator and the drill collar, to reduce mud washing away instrument.Spindle drum 3 belows are main valve seat 5, stationary magazine creel 12, protection tube 11 successively; main valve plug 6 is contained on the main shaft 9; power piston 16 is threaded with main shaft 9; overflow valve screw 13, overflow valve spring 14, overflow valve steel ball 18 are installed on the power piston 16; can adjust the overflow valve opening pressure by adjusting overflow valve screw 13; control produces the amplitude of mud-pulse, and main spring 15 is for moving energy storage on the power piston 16.Electromagnetic valve shell 17, coil case 20, coil rack 21 and electromagnetic valve coil 22, armature 23 are formed electromagnetic valve, electromagnetic valve is installed in a confined space, and be full of silicone oil or hydraulic oil, dummy piston 19 is used for the pressure of balanced solenoid valve confined space and outside, and spring spindle 24 provides tripping force with electromagnetic valve spring 28 for armature resets.Also be provided with spring bearer plate 26 between spring spindle 24 and the electromagnetic valve spring 28.The pressure differential that differential pressure pick-up 27 perception mud pulse generators are inner with outside, thus judge opening or stopping of ground slush pump, further control mud pulse generator and whether can work.Lower house 25 inside also are provided with for the aviation plug 33 that links to each other with Other Instruments and pressure-bearing plug 31.On the outer wall of lower house 25, also be provided with anchor dish 34 and be provided with helmet 35 in the bottom of lower house 25.The sidewall of lower house 25 is provided with the oil stifled 32 for formed cavity between shutoff dummy piston 19 and the armature 23.
When mud circulation, because main valve plug is to the barrier effect of mud, main valve top mud pressure is bigger, high-pressure slurry is incorporated into the power piston bottom through hollow main shaft, and the connection of this passage of solenoid control with close, when the electromagnetic valve adhesive, high-pressure slurry enters into the power piston bottom, the propulsion power piston drives main valve head and moves upward, produce the pressure positive pulse on main valve head top, after electromagnetic valve disconnected, the passage of high-pressure slurry was cut off, main valve head is open under the effect of mud, and it is normal that the main valve head upper pressure is recovered.
When slush pump is opened, 6 pairs of mud circulation of main valve plug produce barrier effect, cause main valve plug 6 top mud pressures big than the bottom mud pressure, this pressure differential of differential pressure pick-up 27 perception, think that mud pulse generator can work, high-pressure slurry flow into the power piston bottom through hollow main shaft, the connection of this passage of solenoid control with close, electromagnetic valve receives the driving signal of driver, and when the electromagnetic valve adhesive, high-pressure slurry enters into the power piston bottom, owing to there is pressure reduction, and the area that is stressed does not wait, and mud propulsion power piston drives main valve head and moves upward, and produces the pressure positive pulse on main valve head top, after electromagnetic valve disconnects, the passage of high-pressure slurry is cut off, and main valve head is open under the effect of mud, and it is normal that the main valve head upper pressure is recovered.Ground installation receives the standpipe pressure signal, obtains with boring the parameter that instrument records through decoding.
Claims (10)
1. down-hole slurry positive pulse generator, it is characterized in that: described down-hole slurry positive pulse generator comprises mud pressure generation component and the mud positive pulse transition components that mud pressure is converted to mud positive pulse; Described mud pressure generation component comprises shell, be arranged on main valve seat on the outer casing inner wall, be arranged on enclosure and can and be sleeved on the main shaft and the main valve plug corresponding with the main valve seat position along the main shaft that axially moves axially of shell; Described shell comprises mud entrance and mud outlet; Described mud entrance connects by main valve plug and mud outlet; Axially being provided with of described main shaft connects the axial axially extending bore of main shaft; Top and the mud entrance of described axially extending bore connect; Described mud positive pulse transition components only leans against the bottom of axially extending bore.
2. down-hole slurry positive pulse generator according to claim 1 is characterized in that: described mud positive pulse transition components comprises protection tube, shell, is arranged on electromagnetic assembly, main spring and the power piston assembly of enclosure; The bottom of described main shaft is stretched in the shell, and described power piston assembly is threaded in axially and between the inwall of protection tube moving axially on the main shaft that stretches in the protection tube and along main shaft; Be provided with cavity between described power piston assembly and the electromagnetic assembly; Described main spring is sleeved on the main shaft and is arranged between power piston assembly and the electromagnetic assembly in the formed cavity; Described electromagnetic assembly only leans against the bottom of axially extending bore; Be provided with the slit between described main shaft and the protection tube; Described slit and mud outlet connect; Formed cavity connects by formed slit between power piston assembly and main shaft and the protection tube between described power piston assembly and the electromagnetic assembly; The bottom of described axially extending bore connects by formed cavity between electromagnetic assembly and power piston assembly and the electromagnetic assembly.
3. down-hole slurry positive pulse generator according to claim 2, it is characterized in that: described power piston assembly upward direction vertically is subjected to the area of mud effect to be subjected to the area of mud effect vertically downwards at the main valve seat place greater than main valve plug.
4. down-hole slurry positive pulse generator according to claim 3 is characterized in that: described power piston assembly comprises piston cylinder, power piston and is arranged on overflow valve on the power piston that power piston assembly overflow valve is arranged in pairs on the power piston.
5. down-hole slurry positive pulse generator according to claim 4, it is characterized in that: described main shaft is provided with screw thread; Described power piston assembly is threaded on the main shaft; Formed cavity connects by formed slit between overflow valve and main shaft and the protection tube between described power piston assembly and the electromagnetic assembly.
6. according to the described down-hole slurry positive pulse generator of the arbitrary claim of claim 2-5, it is characterized in that: described electromagnetic assembly comprises armature, around being arranged on the coil around the armature and acting on the armature and armature is carried out the reset assembly of power-off restoration; The front end face of described armature is bulb or arc; The front end face of described armature only leans against the bottom of axially extending bore.
7. down-hole slurry positive pulse generator according to claim 6, it is characterized in that: described reset assembly comprises the dummy piston that is arranged on the armature front end and the spring that is arranged on the armature rear end; Be provided with cavity between described dummy piston and the armature; Be perfused with silicone oil or hydraulic oil in the described cavity.
8. down-hole slurry positive pulse generator according to claim 7, it is characterized in that: described mud positive pulse transition components also comprises the lower house that is arranged on outer casing bottom and links to each other with shell; Sidewall on the described lower house is provided with differential pressure pickup; Be provided with the fluid passage between the formed cavity between described differential pressure pickup and dummy piston and the armature.
9. according to the described down-hole slurry positive pulse generator of the arbitrary claim of claim 1-5, it is characterized in that: described down-hole slurry positive pulse generator also comprises the fishing head that is arranged on the main shaft top; The position that the top of described axially extending bore and mud entrance connect is provided with the mud filter screen.
10. down-hole slurry positive pulse generator according to claim 8 is characterized in that: described down-hole slurry positive pulse generator also comprises the combined seal ring that is used for can and drill collar inwall that is arranged on the shell; Described combined seal ring is one or multi-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729672 CN203114282U (en) | 2012-12-26 | 2012-12-26 | Underground mud positive pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729672 CN203114282U (en) | 2012-12-26 | 2012-12-26 | Underground mud positive pulse generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114282U true CN203114282U (en) | 2013-08-07 |
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ID=48894642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220729672 Expired - Fee Related CN203114282U (en) | 2012-12-26 | 2012-12-26 | Underground mud positive pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114282U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015990A (en) * | 2012-12-26 | 2013-04-03 | 西安思坦仪器股份有限公司 | Downhole mud positive pulse generator |
| CN105626049A (en) * | 2016-03-28 | 2016-06-01 | 广东普洛测控科技有限公司 | Underground high-frequency pulse generator |
| CN105756672A (en) * | 2016-05-05 | 2016-07-13 | 东营市创元石油机械制造有限公司 | Mud fluid pulser for oil drilling |
| CN108286428A (en) * | 2018-01-08 | 2018-07-17 | 东营植诚机电技术开发有限公司 | A kind of minor diameter metallic piston formula pulse generating unit |
| CN109751046A (en) * | 2019-01-28 | 2019-05-14 | 卢昌琴 | A kind of devices and methods therefor generating pulsed pressure wave using hydrodynamic driving shear valve |
-
2012
- 2012-12-26 CN CN 201220729672 patent/CN203114282U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015990A (en) * | 2012-12-26 | 2013-04-03 | 西安思坦仪器股份有限公司 | Downhole mud positive pulse generator |
| CN105626049A (en) * | 2016-03-28 | 2016-06-01 | 广东普洛测控科技有限公司 | Underground high-frequency pulse generator |
| CN105626049B (en) * | 2016-03-28 | 2019-11-15 | 广东普洛测控科技有限公司 | A kind of underground high frequency pulse generator |
| CN105756672A (en) * | 2016-05-05 | 2016-07-13 | 东营市创元石油机械制造有限公司 | Mud fluid pulser for oil drilling |
| CN105756672B (en) * | 2016-05-05 | 2019-03-26 | 东营市创元石油机械制造有限公司 | Oil drilling slurry pulsator |
| CN108286428A (en) * | 2018-01-08 | 2018-07-17 | 东营植诚机电技术开发有限公司 | A kind of minor diameter metallic piston formula pulse generating unit |
| CN108286428B (en) * | 2018-01-08 | 2021-09-10 | 东营植诚机电技术开发有限公司 | Small-diameter metal piston type pulse generating device |
| CN109751046A (en) * | 2019-01-28 | 2019-05-14 | 卢昌琴 | A kind of devices and methods therefor generating pulsed pressure wave using hydrodynamic driving shear valve |
| CN109751046B (en) * | 2019-01-28 | 2024-05-24 | 卢昌琴 | Device and method for generating pulse pressure wave by utilizing hydrodynamic driving shear valve |
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Legal Events
| 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: 20130807 Termination date: 20211226 |