CN201354584Y - Screw drilling tool - Google Patents
Screw drilling tool Download PDFInfo
- Publication number
- CN201354584Y CN201354584Y CNU2009201059702U CN200920105970U CN201354584Y CN 201354584 Y CN201354584 Y CN 201354584Y CN U2009201059702 U CNU2009201059702 U CN U2009201059702U CN 200920105970 U CN200920105970 U CN 200920105970U CN 201354584 Y CN201354584 Y CN 201354584Y
- Authority
- CN
- China
- Prior art keywords
- fluid motor
- lost
- transmission shaft
- motor rotor
- power transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005553 drilling Methods 0.000 title abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 72
- 210000002445 nipple Anatomy 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 6
- 239000011435 rock Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000002730 additional effect Effects 0.000 description 2
- HCOLPNRPCMFHOH-UHFFFAOYSA-N Prodigiosin Natural products CCCCCC1C=C(C=C/2N=C(C=C2OC)c3ccc[nH]3)N=C1C HCOLPNRPCMFHOH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- TWFGRJUTAULJPZ-USZBIXTISA-N prodigiosin Chemical compound N1=C(C)C(CCCCC)=C\C1=C/C1=NC(C=2[N]C=CC=2)=C[C]1OC TWFGRJUTAULJPZ-USZBIXTISA-N 0.000 description 1
Images
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Screw drill, applied to oil drilling. Is characterized in that: a valve core is fixed in the valve body of the bypass valve. The lower end of the valve body of the bypass valve is provided with an anti-falling short section, and an anti-falling ring is fixed at the lower end in the anti-falling short section; the lower end of the anti-drop nut is connected with an anti-drop joint. The lower end of the anti-falling short section is in threaded connection with a hydraulic motor assembly. The lobe ratio of the liquid motor stator to the liquid motor rotor helix is 8/7. The bent shell is provided with a cardan shaft, and an annular slurry channel is arranged between the cardan shaft and the bent shell. The upper end of the cardan shaft is connected with the lower end of the liquid motor rotor. The lower end of the universal shaft is connected with a transmission shaft. The lower end of the bent shell is connected with a transmission shaft assembly. The effect is as follows: the anti-falling component is of a double anti-falling structure. The meshing curve of the liquid motor stator and the liquid motor rotor is a short-spoke hypocycloid, the liquid motor is in six stages, the torque is large, the flow area is large, the discharge capacity is large, the rock carrying capacity is improved, and the working condition requirement of the PDC drill bit on large torque is met.
Description
Technical field
The utility model relates to a kind of helicoid hydraulic motor of oil drilling, and the lobe number of particularly a kind of high pulling torque fluid motor stator, rotor helical-screw line is than the helicoid hydraulic motor that is 8/7.
Technical background
In the oil and gas exploitation process, need well dynamic tool drives drill bit to creep into during drilling well.The helicoid hydraulic motor of China generally uses in drilling process, and traditional in the past turbodrill is eliminated.
It is 6/5 to be the 5LZ helicoid hydraulic motor that the lobe of the multi lobe motor stator and rotor helix of China's extensive use is at present counted ratio, and there are the following problems for complicated bottom operation for this device:
1, working environment can not be satisfied, the requirement of PDC drill bit high pulling torque can't be adapted at some geological condition more complicated needs high pulling torque.
2, drilling efficiency is relatively low, can't satisfy the working condition requirement of big drilling depth, influences the wellbore construction progress.
3, the easy fracture of 5LZ helicoid hydraulic motor causes the accident under big discharge capacity, the big the pressure of the drill operating mode, and poor reliability, life-span weak point are if adopt the hollow rotor shunting effect undesirable.
The utility model content
The utility model purpose provides a kind of helicoid hydraulic motor, creeps into to adapt to the bad ground high pulling torque.This well dynamic instrument screw drill prodigiosin effectively improves the drilling well operating efficiency, and is safe and reliable, long service life.
For realizing that the purpose of this utility model the utility model adopts technical scheme to be: helicoid hydraulic motor mainly by bypass valve valve body, spool, valve seat, anti-lost nut, anti-lost pipe nipple, anti-lost ring, anti-lost joint, fluid motor stator, fluid motor rotor, universal drive shaft, curved housing, power transmission shaft, go up journal bearing (TC bearing), string bearing; Anti-lost semi-ring and lower radial bearing (TC bearing) are formed, and it is characterized in that: be fixed with spool in the bypass valve valve body.Screw thread is connected with anti-lost pipe nipple in the lower end of bypass valve valve body, and the lower end in the anti-lost pipe nipple is fixed with anti-lost ring; Anti-lost nut is arranged in anti-lost pipe nipple, and anti-lost nut lower end connects cylindric anti-lost joint.Screw thread is connected with the fluid motor assembly in the lower end of anti-lost pipe nipple.The fluid motor assembly comprises urceolus, fluid motor stator and fluid motor rotor.It is 8/7 that the fluid motor stator is counted ratio with the lobe of fluid motor rotor helical-screw line.The center, upper end of fluid motor stator is connected the lower end of anti-lost joint.Connect curved housing in the lower end of urceolus, universal drive shaft is arranged, between universal drive shaft and the curved housing annular slurry channel is arranged at curved housing.The upper end of universal drive shaft is connected the lower end of fluid motor rotor.There is horizontal mud hole the universal drive shaft lower end, and mud can be gone in the center transmission shaft hole by the mud orifice flow.The lower end of universal drive shaft is connected with power transmission shaft.There is the internal thread button lower end of power transmission shaft, can connect drill bit.The lower end of curved housing connects transmission shaft component.Power transmission shaft is in transmission shaft component.
Described transmission shaft component comprises upper shell and lower house, and upper shell is connected the lower end of curved housing, journal bearing on having between power transmission shaft and the upper shell (TC bearing).The lower end of upper shell connects lower house, and anti-lost semi-ring and lower radial bearing (TC bearing) are arranged between power transmission shaft and lower house.
It is 8/7 that described fluid motor stator is counted ratio with the lobe of fluid motor rotor helical-screw line, and promptly fluid motor stator section is eight a threaded hole, and fluid motor rotor section is seven a helical axis, and the pitch curve of fluid motor stator and fluid motor rotor is short spoke hypocycloid.
Described fluid motor rotor is a solid rotor.The fluid motor rotor does not have centre bore.
During work, mud enters bypass valve valve body centre bore, and bypass valve drives by mud and cuts out, and slurry flows drives the fluid motor rotor through the cavity volume that anti-lost pipe nipple enters fluid motor assembly fluid motor stator and fluid motor rotor; Fluid motor rotor rotation drive universal drive shaft passes to power transmission shaft drive drill bit with moment of torsion and creeps into.Steadily drive drill bit at the comprehensive function lower drive shaft of last journal bearing, string bearing and lower radial bearing and carry out Mechanical Crushing; Slurry flows in the fluid motor is discharged by drill bit through curved housing and center transmission shaft hole in addition, plays the fluid power addi-tional crusher.
The beneficial effects of the utility model: the utility model helicoid hydraulic motor has following characteristics:
1, bypass valve adopts piston cylinder operator, opens and closes mud contamination platform when preventing to pull out of hole by mud pressure control in the valve body.
2, anti-lost assembly is formed two anti-lost structures by anti-lost pipe nipple, anti-lost nut, anti-lost joint, anti-lost ring, anti-lost semi-ring four parts.
3, the helical stator section in the fluid motor assembly is eight a threaded hole, the spiral awl is that section is seven a helical axis, and the pitch curve of spiral stator and rotor is short spoke hypocycloid, and fluid motor progression is six grades, moment of torsion is big, satisfies the working condition requirement of PDC drill bit high pulling torque.
4, to count ratio be 8/7 to the lobe of fluid motor stator and rotor helix, and area of passage is big, discharge capacity is big, improves large rock-carrying ability.
5, power transmission shaft adopts TC sintered bearing and thrust string bearing stable drive.
In addition, have characteristics such as moment of torsion is big, drilling well is fast, of many uses.
Description of drawings
Fig. 1 is the utility model helicoid hydraulic motor structural representation;
Fig. 2 is the utility model fluid motor stator 8 and fluid motor rotor 9 cross sectional view.
Among the figure: 1, bypass valve valve body; 2, spool; 3, valve seat; 4, anti-lost nut; 5, anti-lost pipe nipple; 6, anti-lost ring; 7, anti-lost joint; 8, fluid motor stator; 9, fluid motor rotor; 10, universal drive shaft; 11, curved housing; 12, power transmission shaft; 13, go up journal bearing; 14, string bearing; 15, anti-lost semi-ring; 16, lower radial bearing.
The specific embodiment
Embodiment 1: with a diameter is that 172 millimeters helicoid hydraulic motor is an example, and the utility model is described in further detail.
The utility model helicoid hydraulic motor nominal diameter is 172 millimeters, and length is 8390 millimeters.Mainly by bypass valve valve body 1, spool 2, valve seat 3, anti-lost nut 4, anti-lost pipe nipple 5, anti-lost ring 6, anti-lost joint 7, fluid motor stator 8, fluid motor rotor 9, universal drive shaft 10, curved housing 11, power transmission shaft 12, last journal bearing 13, string bearing 14; Anti-lost semi-ring 15 and lower radial bearing 16 are formed.
Consult Fig. 1.In bypass valve valve body 1, be fixed with a hydraulic valve core 2.Be connected with an anti-lost pipe nipple 5 at the lower end of bypass valve valve body 1 screw thread, the lower end in the anti-lost pipe nipple 5 is fixed with anti-lost ring 6; Anti-lost nut 4 is arranged in anti-lost pipe nipple 5, and anti-lost nut 4 lower ends connect a cylindric anti-lost joint 7.Screw thread is connected with the fluid motor assembly in the lower end of anti-lost pipe nipple 5.The fluid motor assembly comprises urceolus, fluid motor stator 8 and fluid motor rotor 9.Consult Fig. 2.It is 8/7 that fluid motor stator 8 is counted ratio with the lobe of fluid motor rotor 9 helixes.Be that fluid motor stator 8 sections are threaded hole of eight, fluid motor rotor 9 sections are helical axis of seven, and fluid motor stator 8 is short spoke hypocycloid with the pitch curve of fluid motor rotor 9.Fluid motor rotor 9 is solid rotors.Fluid motor rotor 9 does not have centre bore.Fluid motor stator 8 external diameters are 148 millimeters.
Consult Fig. 1.The center, upper end of fluid motor stator 8 is connected the lower end of anti-lost joint 7.Connect curved housing 11 in the lower end of urceolus, a universal drive shaft 10 is arranged in curved housing 11, between universal drive shaft 10 and the curved housing 11 annular slurry channel is arranged.The upper end of universal drive shaft 10 is connected the lower end of fluid motor rotor 9.There is the horizontal mud hole of symmetry universal drive shaft 10 lower ends, and mud can be gone in power transmission shaft 12 centre bores by the mud orifice flow.The lower end of universal drive shaft 10 is connected with a power transmission shaft 12.There is the internal thread button lower end of power transmission shaft 12, can connect drill bit.
Lower end at curved housing 11 connects transmission shaft component.Power transmission shaft 12 is in transmission shaft component.Transmission shaft component comprises a upper shell and a lower house, and upper shell is connected the lower end of curved housing 11, journal bearing 13 on having between power transmission shaft 12 and the upper shell (TC bearing).The lower end of upper shell connects lower house, and anti-lost semi-ring 15 and lower radial bearing 16 (TC bearing) are arranged between power transmission shaft 12 and lower house.
In the drilling process, helicoid hydraulic motor is connected the drilling tool lower end.Drilling mud enters bypass valve valve body 1 by drilling rod, enters valve seat 3 at the driving bottom spool 2 of mud, and bypass valve cuts out, and slurry flows is through anti-lost pipe nipple 5 and continuously by the cavity volume between fluid motor stator 8 and the rotor 9.Work done in fluid motor makes fluid motor rotor 9 rotate also transmission and gives universal drive shaft 10 and power transmission shaft 12 according to Moyno principle (Moineau Principle) mud.Steadily drive drill bit at the comprehensive function lower drive shaft of last journal bearing 13, string bearing 14 and lower radial bearing 16 and carry out Mechanical Crushing; Slurry flows is discharged by drill bit through curved housing 11 and power transmission shaft 12 centre bores in addition, plays fluid power addi-tional crusher function and realizes drilling well.When stopping boring, mud pressure drops to zero.Spool 2 is ejected valve seat 3 by spring, and bypass valve cuts out.Its falling-proof apparatus adopts two-stage anti-lost, and anti-lost nut 4, anti-lost joint 7, anti-lost ring 6 and anti-lost pipe nipple 5 are that the first order is anti-lost, and anti-lost semi-ring 15 is that secondary is anti-lost.
The design parameters of the utility model helicoid hydraulic motor:
1 product specification: 7LZ172 * 7Y
2 use traffic scope: 24-38l/s
3 drill speeds: 70-141r/min
4 motor pressure drop: 4.0MPa
5 output torques: 7176Nm
6 power outputs: 149kw
7 maximum the pressure of the drill: 170KNt
8 drilling tool length: 8.39m
9 normal application life: 〉=140h
It is 8/7 that the lobe of the fluid motor stator 8 of the utility model helicoid hydraulic motor and rotor 9 helixes is counted ratio, thereby reaches the requirement of PDC high pulling torque, big discharge capacity, has improved drilling efficiency.Be widely used in drillng operation.
Claims (4)
1, a kind of helicoid hydraulic motor is mainly by bypass valve valve body (1), spool (2), valve seat (3), anti-lost nut (4), anti-lost pipe nipple (5), anti-lost ring (6), anti-lost joint (7), fluid motor stator (8), fluid motor rotor (9), universal drive shaft (10), curved housing (11), power transmission shaft (12), last journal bearing (13), string bearing (14); Anti-lost semi-ring (15) and lower radial bearing (16) are formed, it is characterized in that: in bypass valve valve body (1), be fixed with spool (2), lower end screw thread at bypass valve valve body (1) is connected with anti-lost pipe nipple (5), and the lower end in the anti-lost pipe nipple (5) is fixed with anti-lost ring (6); Anti-lost nut (4) is arranged in anti-lost pipe nipple (5), anti-lost nut (4) lower end connects cylindric anti-lost joint (7), lower end screw thread at anti-lost pipe nipple (5) is connected with the fluid motor assembly, the fluid motor assembly comprises urceolus, fluid motor stator (8) and fluid motor rotor (9), it is 8/7 that fluid motor stator (8) is counted ratio with the lobe of fluid motor rotor (9) helix, the center, upper end of fluid motor stator (8) is connected the lower end of anti-lost joint (7), connect curved housing (11) in the lower end of urceolus, at curved housing (11) universal drive shaft (10) is arranged, between universal drive shaft (10) and the curved housing (11) annular slurry channel is arranged, the upper end of universal drive shaft (10) is connected the lower end of fluid motor rotor (9), there is horizontal mud hole universal drive shaft (10) lower end, mud can be gone in power transmission shaft (12) centre bore by the mud orifice flow, the lower end of universal drive shaft (10) is connected with power transmission shaft (12), there is the internal thread button lower end of power transmission shaft (12), and the lower end of curved housing (11) connects transmission shaft component, and power transmission shaft (12) is in transmission shaft component.
2, a kind of helicoid hydraulic motor according to claim 1, it is characterized in that: described transmission shaft component comprises upper shell and lower house, upper shell is connected the lower end of curved housing (11), last journal bearing (13) is arranged between power transmission shaft (12) and upper shell, the lower end of upper shell connects lower house, and anti-lost semi-ring (15) and lower radial bearing (16) are arranged between power transmission shaft (12) and lower house.
3, a kind of helicoid hydraulic motor according to claim 1, it is characterized in that: it is 8/7 that described fluid motor stator (8) is counted ratio with the lobe of fluid motor rotor (9) helix, be that fluid motor stator (8) section is eight a threaded hole, fluid motor rotor (9) section is seven a helical axis, and fluid motor stator (8) is short spoke hypocycloid with the pitch curve of fluid motor rotor (9).
4, according to claim 1,2 or 3 described a kind of helicoid hydraulic motors, it is characterized in that: described fluid motor rotor (9) is a solid rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201059702U CN201354584Y (en) | 2009-02-19 | 2009-02-19 | Screw drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201059702U CN201354584Y (en) | 2009-02-19 | 2009-02-19 | Screw drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354584Y true CN201354584Y (en) | 2009-12-02 |
Family
ID=41410924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201059702U Expired - Lifetime CN201354584Y (en) | 2009-02-19 | 2009-02-19 | Screw drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354584Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022077A (en) * | 2010-11-16 | 2011-04-20 | 北京华通兴远供热节能技术有限公司 | Drilling device for underground embedded pipe orifice well of soil source heat pump system |
| CN102322222A (en) * | 2011-05-10 | 2012-01-18 | 郭振国 | Novel automatic pin-releasing cored drill stem for rotary drilling rigs |
| CN102808585A (en) * | 2012-08-22 | 2012-12-05 | 辽宁金钻工大机械有限公司 | Fixed gear type heavy load universal shaft device of spiral drilling rig |
| CN103806833A (en) * | 2014-03-18 | 2014-05-21 | 西南石油大学 | High-speed rock-breaking drill tool |
| CN103883246A (en) * | 2014-03-31 | 2014-06-25 | 青岛金江源工贸有限公司 | Efficient positive displacement motor drill under well |
| CN107489375A (en) * | 2017-09-21 | 2017-12-19 | 长江大学 | A kind of rotating impact device |
| CN109138848A (en) * | 2017-06-28 | 2019-01-04 | 盐城市新永佳石油机械制造有限公司 | One kind can steering screw drilling tool |
| CN109630620A (en) * | 2018-12-03 | 2019-04-16 | 西南石油大学 | A kind of no universal shaft screw rod |
| CN110410011A (en) * | 2019-08-03 | 2019-11-05 | 盐城市东荣石油机械有限公司 | It is a kind of with prevent bit port block helicoid hydraulic motor |
| CN111636824A (en) * | 2020-06-18 | 2020-09-08 | 中煤科工集团西安研究院有限公司 | Directional drilling tool of foaming and deslagging screw rod at bottom of double-wall liquid drive hole |
| CN113882798A (en) * | 2021-10-29 | 2022-01-04 | 奥瑞拓能源科技股份有限公司 | Module motor |
| CN118029863A (en) * | 2024-03-06 | 2024-05-14 | 盐城市新永佳石油机械制造有限公司 | Oil seal transmission combined screw drilling tool for directional drilling |
-
2009
- 2009-02-19 CN CNU2009201059702U patent/CN201354584Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022077A (en) * | 2010-11-16 | 2011-04-20 | 北京华通兴远供热节能技术有限公司 | Drilling device for underground embedded pipe orifice well of soil source heat pump system |
| CN102322222A (en) * | 2011-05-10 | 2012-01-18 | 郭振国 | Novel automatic pin-releasing cored drill stem for rotary drilling rigs |
| CN102808585A (en) * | 2012-08-22 | 2012-12-05 | 辽宁金钻工大机械有限公司 | Fixed gear type heavy load universal shaft device of spiral drilling rig |
| CN103806833A (en) * | 2014-03-18 | 2014-05-21 | 西南石油大学 | High-speed rock-breaking drill tool |
| CN103883246A (en) * | 2014-03-31 | 2014-06-25 | 青岛金江源工贸有限公司 | Efficient positive displacement motor drill under well |
| CN103883246B (en) * | 2014-03-31 | 2016-02-17 | 青岛金江源工贸有限公司 | Underground high-efficient helicoid hydraulic motor |
| CN109138848B (en) * | 2017-06-28 | 2023-09-08 | 盐城市新永佳石油机械制造有限公司 | Steerable screw drilling tool |
| CN109138848A (en) * | 2017-06-28 | 2019-01-04 | 盐城市新永佳石油机械制造有限公司 | One kind can steering screw drilling tool |
| CN107489375A (en) * | 2017-09-21 | 2017-12-19 | 长江大学 | A kind of rotating impact device |
| CN109630620A (en) * | 2018-12-03 | 2019-04-16 | 西南石油大学 | A kind of no universal shaft screw rod |
| CN110410011A (en) * | 2019-08-03 | 2019-11-05 | 盐城市东荣石油机械有限公司 | It is a kind of with prevent bit port block helicoid hydraulic motor |
| CN111636824A (en) * | 2020-06-18 | 2020-09-08 | 中煤科工集团西安研究院有限公司 | Directional drilling tool of foaming and deslagging screw rod at bottom of double-wall liquid drive hole |
| CN111636824B (en) * | 2020-06-18 | 2022-05-10 | 中煤科工集团西安研究院有限公司 | Directional drilling tool of foaming and deslagging screw rod at bottom of double-wall liquid drive hole |
| CN113882798A (en) * | 2021-10-29 | 2022-01-04 | 奥瑞拓能源科技股份有限公司 | Module motor |
| CN118029863A (en) * | 2024-03-06 | 2024-05-14 | 盐城市新永佳石油机械制造有限公司 | Oil seal transmission combined screw drilling tool for directional drilling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201354584Y (en) | Screw drilling tool | |
| US20180051516A1 (en) | Hydraulic Gentle Vibration Speed Enhancing Drilling | |
| CN2871787Y (en) | Power head of driller | |
| CN107386960B (en) | Drilling speed-increasing device with composite drill bit | |
| CN106761382A (en) | A kind of deep-well coring device and its operating method | |
| CN104895517A (en) | Worm-driven double-valve hydraulic oscillator | |
| CN103147711B (en) | A kind of milling tool for oil well, well and using method thereof | |
| CN106968598A (en) | A kind of unconventional super tight stratum high pulling torque boring means | |
| CN107542405A (en) | Waterpower pulse helicoid hydraulic motor | |
| CN107217982A (en) | Underground coal mine drilling multistage deslagging air screw motor | |
| CN213980619U (en) | Screw drilling tool with ratchet mechanism | |
| CN205445463U (en) | Split type drill driver ware of friction speed | |
| CN106121540B (en) | Shaft bottom drilling liquid pressure concussion modulator | |
| CN201228754Y (en) | Downhole small teeth difference external tooth output decelerator | |
| CN112502609A (en) | Full-open type rotary-punching screw drill | |
| CN106089024A (en) | A kind of torsion rushes motor | |
| CN207829799U (en) | A kind of hold angle helicoid hydraulic motor for extended reach directional well | |
| CN208137842U (en) | Hydraulic blow helicoid hydraulic motor | |
| CN203248101U (en) | Drilling tool capable of preventing stall | |
| CN205977090U (en) | High -efficient anti screw rod drilling tool that dashes | |
| CN111577139A (en) | Turbine-driven hydraulic pulse generator | |
| CN113006695B (en) | PDC drill bit pulse impact device and method | |
| CN201507239U (en) | Turbine rotor stator | |
| CN211500536U (en) | Downhole gas phase space rotating and swinging drilling tool | |
| CN2923970Y (en) | Novel power head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091202 |