CN203891824U - Self-lubricating oil pumping polish rod sealing device - Google Patents
Self-lubricating oil pumping polish rod sealing device Download PDFInfo
- Publication number
- CN203891824U CN203891824U CN201420324375.9U CN201420324375U CN203891824U CN 203891824 U CN203891824 U CN 203891824U CN 201420324375 U CN201420324375 U CN 201420324375U CN 203891824 U CN203891824 U CN 203891824U
- Authority
- CN
- China
- Prior art keywords
- gland
- seal box
- polish rod
- oil pumping
- pumping polish
- 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 - Fee Related
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 87
- 238000007789 sealing Methods 0.000 title claims abstract description 26
- 239000010687 lubricating oil Substances 0.000 title abstract 5
- 210000004907 gland Anatomy 0.000 claims abstract description 114
- 230000001050 lubricating effect Effects 0.000 claims description 29
- 238000012856 packing Methods 0.000 claims description 9
- 239000003129 oil well Substances 0.000 abstract description 8
- 239000003921 oil Substances 0.000 abstract 9
- 239000000945 filler Substances 0.000 abstract 3
- 239000000314 lubricant Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 description 20
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The utility model relates to a self-lubricating oil pumping polish rod sealing device, in particular to a self-lubricating oil pumping polish rod sealing device which is suitable for the condition of dry pumping of an oil well. The self-lubricating oil pumping polish rod sealing device comprises a sealing box 1, sealing filler 2, an oil cup 3, a lubricating agent 4, a sealed box gland 5, an oil duct 6, a sealing pad 7, a sealing gasket 8, a pressing sleeve 9, an oil pumping polish rod 10, a gland 11, a bolt 12, a washer 13, a gland handle 14, a sealed box gland handle 15, an upper follow-up pad 16, a lower follow-up pad 17 and the like. The self-lubricating oil pumping polish rod sealing device has the advantages that due to the fact that the oil pumping polish rod is soaked in the lubricating agent, an oil film is formed on the surface of the oil pumping polish rod when the oil pumping polish rod moves up and down, friction between the oil pumping polish rod and the sealing filler is reduced, and the oil pumping polish rod and the sealing filler can not be damaged when dry pumping is conducted on the oil well.
Description
Technical field
The utility model relates to a kind of self-lubricating piston rod sealer for pumping oil, is especially applicable to the piston rod sealer for pumping oil using in oil well dry tap situation.
Background technology
The oil well sealer using at present, does not generally have self-lubricating function.When oil well liquid level declines, will there is dry tap in oil well pump, thereby dry grind between oil pumping polish rod and airtight and watertight padding, causes the damage of oil pumping polish rod and airtight and watertight padding.
Summary of the invention
The purpose of this utility model is to design a kind of self-lubricating piston rod sealer for pumping oil, can automatically to oil pumping polish rod and airtight and watertight padding, be lubricated, and reduces the friction between them, the self-lubricating piston rod sealer for pumping oil of protection oil pumping polish rod and airtight and watertight padding.
The utility model comprises seal box 1, airtight and watertight padding 2, lubricating cup 3, sliding agent 4, seal box gland 5, oil duct 6, gasket base 7, sealing mat 8, gland 9, oil pumping polish rod 10, gland 11, bolt 12, packing ring 13, gland handle 14, seal box gland handle 15, upper servo-actuated pad 16 and lower servo-actuated pad 17 etc.The inner chamber top of seal box 1 is circular cylindrical cavity, and bottom is truncated cone-shaped cavity, and there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, internal thread is arranged at the bottom of seal box 1, to be connected with well head, external screw thread is arranged at the top of seal box 1, to be connected with seal box gland 5.The inner chamber of seal box 1 is inserted in airtight and watertight padding 2, and upper servo-actuated pad 16 and lower servo-actuated pad 17 are truncated cone-shaped, and there is circular hole at their center, so that oil pumping polish rod 10 passes, upper servo-actuated pad 16 and lower servo-actuated pad 17 prevent that airtight and watertight padding 2 from being taken out of by oil pumping polish rod 10.Lubricating cup 3 is that cylinder is cup-shaped, and there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, flange is arranged at the top of lubricating cup 3, so that lubricating cup 3 is from the interior taking-up of seal box 1, lubricating cup 3 is arranged in the inner chamber of seal box 1, lubricating cup 3 is pressed in servo-actuated pad 16 and airtight and watertight padding 2, is full of sliding agent 4 in lubricating cup 3.Seal box gland 5 has internal thread, match with the external screw thread of seal box 1, external screw thread is arranged at the top of seal box gland 5, to be connected with gland 11, there is circular hole at the center of seal box gland 5, so that oil pumping polish rod 10 passes, on seal box gland 5, there is oil duct 6, so that sliding agent 4 flows in lubricating cup 3, there is seal box gland handle 15 outside of seal box gland 5, to tighten seal box gland 5.Gasket base 7 is that cylinder is cup-shaped, there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, sealing mat 8 is installed in its inside, and gland 9 is cylindrical, there is circular hole at Ta center, so that oil pumping polish rod 10 passes, flange is arranged at the top of gland 9, so that gland 9 is from the interior taking-up of gasket base 7, gland 9 is pressed on sealing mat 8, to prevent that oil pumping polish rod 10 from taking sliding agent 4 out of.There is circular hole at gland 11 center, so that oil pumping polish rod 10 passes, has bolt 12 and packing ring 13 on gland 11, so that add sliding agent 4, gland 11 has internal thread, matches with the external screw thread of seal box gland 5, there is gland handle 14 outside of gland 11, in order to tighten gland 11.
This self-lubricating piston rod sealer for pumping oil, in use, first seal box 1 is arranged on well head through oil pumping polish rod 10, lower servo-actuated pad 17 is placed on to the bottom of seal box 1 through oil pumping polish rod 10, add airtight and watertight padding 2, again upper servo-actuated pad 16 is pressed in airtight and watertight padding 2 through oil pumping polish rod 10, then lubricating cup 3 is installed, then seal box gland 5 is installed.Gasket base 7, sealing mat 8 and gland 9 are placed on seal box gland 5 through oil pumping polish rod 10, and then gland 11 is installed.Tighten after seal box gland 5 and gland 11, unload bolt 12, inject sliding agent 4, tight a bolt 12, just can use.
The utility model has the advantage of this self-lubricating piston rod sealer for pumping oil, because oil pumping polish rod infiltrates in sliding agent, when oil pumping polish rod moves up and down, can form oil film on oil pumping polish rod surface, reduced the friction between oil pumping polish rod and airtight and watertight padding, when oil well dry tap, can not cause damage to oil pumping polish rod and airtight and watertight padding.
Accompanying drawing explanation
Fig. 1 is that the inner chamber top of the utility model self-lubricating piston rod sealer for pumping oil is that cylindrical lower portion is the front view of truncated cone-shaped cavity;
Fig. 2 is the front view that the inner chamber of the utility model self-lubricating piston rod sealer for pumping oil is circular cylindrical cavity.
In Fig. 1 and Fig. 2,
1-seal box, 2-airtight and watertight padding, 3-lubricating cup, 4-sliding agent, 5-seal box gland, 6-oil duct, 7-gasket base, 8-sealing mat, 9-gland, 10-oil pumping polish rod, 11-gland, 12-bolt, 13-packing ring, 14-gland handle, 15-seal box gland handle, the upper servo-actuated pad of 16-, servo-actuated pad under 17-.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment 1
The present embodiment as shown in Figure 1, comprises seal box 1, airtight and watertight padding 2, lubricating cup 3, sliding agent 4, seal box gland 5, oil duct 6, gasket base 7, sealing mat 8, gland 9, oil pumping polish rod 10, gland 11, bolt 12, packing ring 13, gland handle 14, seal box gland handle 15, upper servo-actuated pad 16 and lower servo-actuated pad 17 etc.The inner chamber top of seal box 1 is circular cylindrical cavity, and bottom is truncated cone-shaped cavity, and there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, internal thread is arranged at the bottom of seal box 1, to be connected with well head, external screw thread is arranged at the top of seal box 1, to be connected with seal box gland 5.The inner chamber of seal box 1 is inserted in airtight and watertight padding 2, and upper servo-actuated pad 16 and lower servo-actuated pad 17 are truncated cone-shaped, and there is circular hole at their center, so that oil pumping polish rod 10 passes, upper servo-actuated pad 16 and lower servo-actuated pad 17 prevent that airtight and watertight padding 2 from being taken out of by oil pumping polish rod 10.Lubricating cup 3 is that cylinder is cup-shaped, and there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, flange is arranged at the top of lubricating cup 3, so that lubricating cup 3 is from the interior taking-up of seal box 1, lubricating cup 3 is arranged in the inner chamber of seal box 1, be pressed in servo-actuated pad 16 and airtight and watertight padding 2, in lubricating cup 3, be full of sliding agent 4.Seal box gland 5 has internal thread, match with the external screw thread of seal box 1, external screw thread is arranged at the top of seal box gland 5, to be connected with gland 11, there is circular hole at the center of seal box gland 5, so that oil pumping polish rod 10 passes, on seal box gland 5, there is oil duct 6, so that sliding agent 4 flows in lubricating cup 3, there is seal box gland handle 15 outside of seal box gland 5, to tighten seal box gland 5.Gasket base 7 is that cylinder is cup-shaped, there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, sealing mat 8 is installed in its inside, and gland 9 is cylindrical, there is circular hole at Ta center, so that oil pumping polish rod 10 passes, flange is arranged at the top of gland 9, so that gland 9 is from the interior taking-up of gasket base 7, gland 9 is pressed on sealing mat 8, to prevent that oil pumping polish rod 10 from taking sliding agent 4 out of.There is circular hole at gland 11 center, so that oil pumping polish rod 10 passes, has bolt 12 and packing ring 13 on gland 11, so that add sliding agent 4, gland 11 has internal thread, matches with the external screw thread of seal box gland 5, there is gland handle 14 outside of gland 11, in order to tighten gland 11.
Embodiment 2
The present embodiment as shown in Figure 2, comprises seal box 1, airtight and watertight padding 2, lubricating cup 3, sliding agent 4, seal box gland 5, oil duct 6, gasket base 7, sealing mat 8, gland 9, oil pumping polish rod 10, gland 11, bolt 12, packing ring 13, gland handle 14, seal box gland handle 15, upper servo-actuated pad 16 and lower servo-actuated pad 17 etc.The inner chamber of seal box 1 is circular cylindrical cavity, and there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, internal thread is arranged at the bottom of seal box 1, to be connected with well head, external screw thread is arranged at the top of seal box 1, to be connected with seal box gland 5.The inner chamber of seal box 1 is inserted in airtight and watertight padding 2, and upper servo-actuated pad 16 and lower servo-actuated pad 17 are truncated cone-shaped, and there is circular hole at their center, so that oil pumping polish rod 10 passes, upper servo-actuated pad 16 and lower servo-actuated pad 17 prevent that airtight and watertight padding 2 from being taken out of by oil pumping polish rod 10.Lubricating cup 3 is that cylinder is cup-shaped, and there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, flange is arranged at the top of lubricating cup 3, so that lubricating cup 3 is from the interior taking-up of seal box 1, lubricating cup 3 is arranged in the inner chamber of seal box 1, be pressed in servo-actuated pad 16 and airtight and watertight padding 2, in lubricating cup 3, be full of sliding agent 4.Seal box gland 5 has internal thread, match with the external screw thread of seal box 1, external screw thread is arranged at the top of seal box gland 5, to be connected with gland 11, there is circular hole at the center of seal box gland 5, so that oil pumping polish rod 10 passes, on seal box gland 5, there is oil duct 6, so that sliding agent 4 flows in lubricating cup 3, there is seal box gland handle 15 outside of seal box gland 5, to tighten seal box gland 5.Gasket base 7 is that cylinder is cup-shaped, there is circular hole in its bottom centre, so that oil pumping polish rod 10 passes, sealing mat 8 is installed in its inside, and gland 9 is cylindrical, there is circular hole at Ta center, so that oil pumping polish rod 10 passes, flange is arranged at the top of gland 9, so that gland 9 is from the interior taking-up of gasket base 7, gland 9 is pressed on sealing mat 8, to prevent that oil pumping polish rod 10 from taking sliding agent 4 out of.There is circular hole at gland 11 center, so that oil pumping polish rod 10 passes, has bolt 12 and packing ring 13 on gland 11, so that add sliding agent 4, gland 11 has internal thread, matches with the external screw thread of seal box gland 5, there is gland handle 14 outside of gland 11, in order to tighten gland 11.
This self-lubricating piston rod sealer for pumping oil, in use, first seal box 1 is arranged on well head through oil pumping polish rod 10, lower servo-actuated pad 17 is placed on to the bottom of seal box 1 through oil pumping polish rod 10, add airtight and watertight padding 2, again upper servo-actuated pad 16 is pressed in airtight and watertight padding 2 through oil pumping polish rod 10, then lubricating cup 3 is installed, then seal box gland 5 is installed.Gasket base 7, sealing mat 8 and gland 9 are placed on seal box gland 5 through oil pumping polish rod 10, and then gland 11 is installed.Tighten after seal box gland 5 and gland 11, unload bolt 12, inject sliding agent 4, tight a bolt 12, just can use.
The utility model has the advantage of this self-lubricating piston rod sealer for pumping oil, because oil pumping polish rod infiltrates in sliding agent, when oil pumping polish rod moves up and down, can form oil film on oil pumping polish rod surface, reduced the friction between oil pumping polish rod and airtight and watertight padding, when oil well dry tap, can not cause damage to oil pumping polish rod and airtight and watertight padding.
Claims (2)
1. a self-lubricating piston rod sealer for pumping oil, comprise seal box (1), airtight and watertight padding (2), lubricating cup (3), sliding agent (4), seal box gland (5), oil duct (6), gasket base (7), sealing mat (8), gland (9), oil pumping polish rod (10), gland (11), bolt (12), packing ring (13), gland handle (14), seal box gland handle (15), upper servo-actuated pad (16) and lower servo-actuated pad (17), the inner chamber top that it is characterized in that seal box (1) is circular cylindrical cavity, bottom is truncated cone-shaped cavity, there is circular hole in its bottom centre, internal thread is arranged at the bottom of seal box (1), seal box (1) is arranged on well head through oil pumping polish rod (10), external screw thread is arranged at the top of seal box (1), upper servo-actuated pad (16) and lower servo-actuated pad (17) are truncated cone-shaped, there is circular hole at their center, through oil pumping polish rod (10), be arranged in the inner chamber of seal box (1), airtight and watertight padding (2) is inserted in the inner chamber of seal box (1), lubricating cup (3) is that cylinder is cup-shaped, there is circular hole in its bottom centre, through oil pumping polish rod (10), be arranged in the inner chamber of seal box (1), lubricating cup (3) is pressed in servo-actuated pad (16) and airtight and watertight padding (2), flange is arranged at the top of lubricating cup (3), in lubricating cup (3), be full of sliding agent (4), seal box gland (5) has internal thread, match with the external screw thread of seal box (1), there is circular hole at the center of seal box gland (5), through oil pumping polish rod (10), be arranged on seal box (1), external screw thread is arranged at the top of seal box gland (5), on seal box gland (5), there is oil duct (6), there is seal box gland handle (15) outside of seal box gland (5), gasket base (7) is that cylinder is cup-shaped, there is circular hole in its bottom centre, through oil pumping polish rod (10), be placed on seal box gland (5), sealing mat (8) is arranged in gasket base (7), gland (9) is cylindrical, there is circular hole at Ta center, through oil pumping polish rod (10), be pressed on sealing mat (8), flange is arranged at the top of gland (9), gland (11) has internal thread, match with the external screw thread of seal box gland (5), there is circular hole at the center of gland (11), through oil pumping polish rod (10), be arranged on seal box gland (5), on gland (11), there are bolt (12) and packing ring (13), there is gland handle (14) outside of gland (11).
2. self-lubricating piston rod sealer for pumping oil according to claim 1, the inner chamber that it is characterized in that seal box (1) is circular cylindrical cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324375.9U CN203891824U (en) | 2014-06-10 | 2014-06-10 | Self-lubricating oil pumping polish rod sealing device |
| PCT/CN2015/079669 WO2015188688A1 (en) | 2014-06-10 | 2015-05-25 | Self-lubricating oil-pumping polished rod sealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324375.9U CN203891824U (en) | 2014-06-10 | 2014-06-10 | Self-lubricating oil pumping polish rod sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203891824U true CN203891824U (en) | 2014-10-22 |
Family
ID=51718240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420324375.9U Expired - Fee Related CN203891824U (en) | 2014-06-10 | 2014-06-10 | Self-lubricating oil pumping polish rod sealing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203891824U (en) |
| WO (1) | WO2015188688A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089539A (en) * | 2015-07-16 | 2015-11-25 | 中国石油天然气股份有限公司 | Oil well head polish rod lubricating device |
| WO2015188688A1 (en) * | 2014-06-10 | 2015-12-17 | 刘玉玺 | Self-lubricating oil-pumping polished rod sealer |
| CN112212198A (en) * | 2020-10-13 | 2021-01-12 | 张利东 | Lubricating energy-saving system for oil pumping unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116607908B (en) * | 2023-07-20 | 2023-09-29 | 北京汉诺威自控技术有限公司 | Polished rod structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1343103A2 (en) * | 1986-05-30 | 1987-10-07 | Н.М.Ахметз нов | Device for sealing stem of well pump on well mouth |
| US4981174A (en) * | 1990-02-14 | 1991-01-01 | White Orvel O | Leakproof stuffing box with external lubrication for polish rod |
| CN201144664Y (en) * | 2008-01-04 | 2008-11-05 | 克拉玛依新波有限责任公司 | Self-lubricating anti-offset polished rod sealer |
| CN201802337U (en) * | 2010-03-26 | 2011-04-20 | 李红宾 | Energy-saving pumping well head sealer |
| CN201695983U (en) * | 2010-07-03 | 2011-01-05 | 孙月东 | Polish-rod sealer |
| CN202417379U (en) * | 2011-09-25 | 2012-09-05 | 李昱 | Novel polished rod sealing device for wellhead of oil pumping well |
| CN203891824U (en) * | 2014-06-10 | 2014-10-22 | 刘玉玺 | Self-lubricating oil pumping polish rod sealing device |
-
2014
- 2014-06-10 CN CN201420324375.9U patent/CN203891824U/en not_active Expired - Fee Related
-
2015
- 2015-05-25 WO PCT/CN2015/079669 patent/WO2015188688A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015188688A1 (en) * | 2014-06-10 | 2015-12-17 | 刘玉玺 | Self-lubricating oil-pumping polished rod sealer |
| CN105089539A (en) * | 2015-07-16 | 2015-11-25 | 中国石油天然气股份有限公司 | Oil well head polish rod lubricating device |
| CN105089539B (en) * | 2015-07-16 | 2019-02-15 | 中国石油天然气股份有限公司 | Oil well head polish rod lubricating device |
| CN112212198A (en) * | 2020-10-13 | 2021-01-12 | 张利东 | Lubricating energy-saving system for oil pumping unit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015188688A1 (en) | 2015-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203891824U (en) | Self-lubricating oil pumping polish rod sealing device | |
| CN104329302B (en) | One is pressurized fuel tank step by step | |
| CN203978360U (en) | Self-lubricating oil pumping polish rod is followed the tracks of sealer | |
| CN103759125A (en) | Fluid draining and feeding device | |
| CN204921997U (en) | Novel piston rod seal assembly | |
| CN104633115A (en) | Compression expanding type pipe opening inner diameter high-pressure sealing device and method | |
| CN204240024U (en) | Energy-saving grease adding instrument | |
| CN203272106U (en) | Novel oil leakage preventive booster pump | |
| CN105298425A (en) | Self-lubricating polished sucker rod seal | |
| CN202140060U (en) | Sealing device of pumping well | |
| CN205823713U (en) | A kind of vertical pump is with sealing structure | |
| CN203978361U (en) | Oil pumping polish rod is with motion tracking sealer | |
| CN104385908A (en) | Universal loss prevention oil tank cover | |
| CN105275420A (en) | Polished oil-sucking rod follow-up tracking sealer | |
| CN110259597A (en) | A kind of new Joining Structure between valve mechanism cover and cylinder head | |
| CN205780005U (en) | Explosion-proof type carries material oil cylinder | |
| CN204458307U (en) | Water inflow prevention stopper of plunger pump crankcase | |
| CN105239949A (en) | Self-lubricating polished sucker rod tracking seal | |
| CN203809428U (en) | Oil absorption filter element capable of preventing air from being sucked | |
| CN205824353U (en) | A kind of valve sealing device | |
| CN205146135U (en) | Agitating unit is used in laboratory with sealing performance | |
| CN204253349U (en) | High pressure reciprocating water injection pump splash proof device | |
| CN204901298U (en) | Can instruct oil cup of oil level | |
| CN203703582U (en) | Fluid draining and filling device | |
| CN203907189U (en) | Oil injection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: LIU LEI Effective date: 20150820 Owner name: WEILE ENERGY TECHNOLOGY (BEIJING) CO., LTD. Free format text: FORMER OWNER: LIU YUXI Effective date: 20150820 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150820 Address after: 100080, Beijing, Haidian District, No. 68 West Fourth Ring Road, left bank, 12 floor, 1215-1218 Patentee after: WEILE ENERGY TECHNOLOGY (BEIJING) CO., LTD. Address before: 834000 No. 251 Friendship Road, the Xinjiang Uygur Autonomous Region, Karamay TV University retirement station Patentee before: Liu Yuxi Patentee before: Liu Lei |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20170610 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |