CN203791277U - Cleaning and oil flushing device for lubricating oil system pipeline of machine set - Google Patents
Cleaning and oil flushing device for lubricating oil system pipeline of machine set Download PDFInfo
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- CN203791277U CN203791277U CN201420197124.9U CN201420197124U CN203791277U CN 203791277 U CN203791277 U CN 203791277U CN 201420197124 U CN201420197124 U CN 201420197124U CN 203791277 U CN203791277 U CN 203791277U
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 55
- 239000003921 oil Substances 0.000 title claims abstract description 50
- 238000004140 cleaning Methods 0.000 title claims abstract description 32
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000010992 reflux Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 19
- 239000012535 impurity Substances 0.000 description 7
- 238000005554 pickling Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 235000007849 Lepidium sativum Nutrition 0.000 description 3
- 244000211187 Lepidium sativum Species 0.000 description 3
- 241000322338 Loeseliastrum Species 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 235000021110 pickles Nutrition 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 239000013527 degreasing agent Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Cleaning In General (AREA)
Abstract
The utility model discloses a cleaning and oil flushing device for a lubricating oil system pipeline of a machine set. The device comprises a pump unit and a reversed flow unit, wherein the pump unit comprises a coarse filter, a centrifugal pump, and a fine filter which are communicated with one another through a pipeline; a stop valve, a nitrogen inlet and a pressure gauge are arranged on the pipeline; an outlet pipeline of the coarse filter is communicated with a flushing pipe; the reversed flow unit comprises a box-type container; an electric heater is arranged in the box-type container; a temperature measuring instrument is arranged on the box-type container; a drainage valve is arranged at the bottom of the box-type container; an inlet pipeline of the box-type container is communicated with a reversed flow pipe; a particle counter is arranged on the inlet pipeline; the outlet of the box-type container is communicated with the inlet of the coarse filter through the pipeline; the machine set pipeline is connected between the reversed flow pipe and the flushing pipe. The cleaning and oil flushing device for the lubricating oil system pipeline of the machine set can perform independent cleaning outside the machine set and oil flushing on a pipeline installed on the construction site of a large machine set; besides, the cleaning cycle is short, thorough cleaning and purifying effect is achieved, construction pollution is eliminated, the practicality is strong, and the device is especially suitable for flow construction.
Description
(1) technical field:
The utility model relates to the large-scale set lubricating oil system technology of petrochemical industry, is specially a kind of set lubricating oil system pipeline and cleans and oil flushing equipment.
(2) background technology:
Large-scale unit is the nucleus equipment in petrochemical plant, and its normal operation is exactly the important leverage that petrochemical plant is produced normal operation.And petrochemical industry set lubricant oil pipe-line system is one of most important part in these parts, it is mainly lubricating oil to be provided and to provide power oil for adjusting security system for the each bearing portion of unit.Therefore, the Cress quality of this internal system environment, very important to the safe and stable operation of unit.
Petrochemical industry set lubricating oil system lubricating pipe in work progress needs on-the-spot pipe arrangement, will carry out degreasing, pickling, neutralization and cleaning to field erected pipeline, and then system is carried out to oil flushing purification before unit operation operation.According to requiring in GB50231-2009 " mechanical equipment installation engineering construction and examination general specification " 6.4.1, " rust cleaning of hydraulic pressure, lubrication piping should adopt acid wash, and the technological process of cleaning should adopt: machinery or the prerinse → degreasing → acid pickling and rust removing that deoils → alkalescence of manually dirt of surface adhesion being removed neutralize residual pickle → water rinse or flushing → dry plant equipment and pipeline → antirust processing of cleaning.", in 6.4.5, require " pipeline of hydraulic pressure, lubricating system in the time that pickling is come into operation, the liquid that should adopt working media or be equivalent to working media rinses ".
Original technical method:
Original unit lubricating system method clean and that oil flushing construction the most often adopts is, it is clean that first on-the-spot pipeline carries out pickling, passivation and water, utilizes chemical reaction, dissolves the product such as rusty stain, oxide-film and do not affect the method for parent metal at surface of the work.The method that judges duct cleaning is that input compression purifies air and practices shooting and check do not have visible pollutant to show drying at mouth of pipe calico.Clean pipeline is returned in set lubricating oil system, adds lubricating oil, utilizes oil pump in system to carry out circulation flushing, and the foreign material such as burr, welding slag of pipe interior are cleaned out.Detecting pipeline system oil and rinse the method for cleanliness factor, is the interim screen pack in the system of taking off, visual inspection can't see grit and be less than the soft impurity of specified quantity after sample examination, when sample contamination degree reach when regulation requires, show to rinse qualified.
Art methods:
The method clean and oil flushing of the large-scale unit lubricating system of existing petrochemical industry is a lot, it is generally to adopt interim pipeline and flush water pump that field erected pipeline and cleaning equipment connection are formed to loop by professional cleaning company or installation unit that acid wash passivation cleans, and then carries out circulation flushing.And existing unit Oil System Flushing is first to throw off machine body, utilize the lubricating oil station of unit itself, the interim flange of situ configuration and transparent hose connection system form loop and carry out circulation flushing, and flushing process colds and heat succeed each other and adds gentleness and knock the methods such as cleaning such as pipeline.Interim screen pack impurity screening is installed in loop, and after screen pack free from admixture to be checked, communicating machine body continues circulation flushing.
The shortcoming that existing method exists:
1, the pipeline of system occasion of rinsing group belongs to three-dimensional or is arranged vertically in device, and valve pipe fitting connects more complicated, and in cleaning process, liquid is not full state, and some dead angles and the blind spot of pipeline inside do not have clean bits.
2, the valve pipe fitting in system is easily caused inefficacy by chemical corrosion in closed circuit.
3, oil flushing is to utilize the oil pump of petrol station to carry out, and general flow is less, and the oil inlet pipe of system and oil return pipe size differ greatly, oil return pipeline can not be full of, and there is the dead angle and the blind spot that do not flush, although that dustiness is taken a sample to check is qualified, intrasystem pollutant still exists.In the time that pipeline recovers to carry out machine body circulation flushing, pollutant will enter into petrol station and equipment, causes secondary pollution, brings quality and potential safety hazard to the operation of unit in the future.Just there is clearly regulation in some external unit manufacturers, field erected pipeline must machine outward separate cleaning can be connected again and rinse with unit after qualified with oil flushing.
4, the filter screen inspection that oil flushing arranges, all needs to shut down at every turn and opens and inspect cleaning, has repeatedly shut down machine, has extended the flushing duration.
5, there is interim transparent hose easily to harden and cause interface leakage of oil and break in oil flushing process, make outflow of lubrication oil contaminated site, thereby cause the waste of lubricating oil.
Existing large-scale unit Oil System Flushing, also has the equipment that adopts large flow oil flushing.But its volume is larger, equipment heaviness, versatility is poor, only in the Oil System Flushing of power plant's Large Steam Turbine Sets, applies, and not yet finds at the high flux flushing equipment of petrochemical equipment oil system oil flushing.
(3) utility model content:
In order to solve, the cleaning time existing in art methods is long, efficiency is low, cleanly thoroughly do not pollute the technical problems such as machine, the utility model proposes a kind of set lubricating oil system pipeline and cleans and oil flushing equipment.
The set lubricating oil system pipeline that can solve the problems of the technologies described above cleans and oil flushing equipment, comprise that pump is to unit and reflux unit, described pump comprises coarse filter, centrifugal pump and the fine filtrator by pipeline connection to unit, on pipeline between described coarse filter and centrifugal pump, between described centrifugal pump and fine filtrator, be equipped with stop valve, on pipeline between centrifugal pump and fine filtrator, be also provided with nitrogen inlet and Pressure gauge, the export pipeline of described fine filtrator is communicated with cleaning hose; Described reflux unit comprises box-type container, in described box-type container, be provided with electric heater, box-type container is provided with temperature measurer, and the bottom of box-type container is provided with blowoff valve, the inlet ductwork of described box-type container is communicated with return duct, in described inlet ductwork, particle collector is set; The outlet of described box-type container communicates by pipeline with the import of coarse filter, is unit pipeline (being rinsed pipeline) on-position between described return duct and cleaning hose.
Described fine filtrator preferably adopts duplex strainer, and described duplex strainer is used by transfer valve control alternate conduction, ensures to clear up respectively the screen pack of filter in the situation that not stopping clean and flushing (not shutting down).
For meeting clean and developing technique requirement, the filtering accuracy of described coarse filter is chosen as 400 μ m～500 μ m, and the filtering accuracy of described duplex strainer is chosen as 5 μ m～120 μ m.
For meeting clean and developing technique requirement, the measurement category of described particle collector is chosen as 1 μ m～450 μ m.
The beneficial effects of the utility model:
1, the clean and oil flushing equipment of the utility model set lubricating oil system pipeline is a set ofly not only can be used for clean but also can be used for the device of oil flushing, field erected unit pipeline in set lubricating oil system is removed and carries out the outer separate cleaning of unit and oil flushing, because this part unit pipeline is that impurity is maximum in system, the most difficult clean part, clean these pipelines qualified with oil flushing, system miscellaneous part is clean just than being easier to; This device possesses cycle pickling, high flux flushing, add nitrogen wash and in advantages such as X-ray inspection Xs.
2, the utility model has reached thoroughly clean, be not subject to the large small-scale of unit and the changeable impact of construction environment, can be to the thorough Cress of lubricating oil system pipeline, equipment can be controlled automatically, and operating efficiency is high, constructs pollution-free, operating expenses is low, applied widely, practical, the operation of particularly suitable mobile construction.
(4) brief description of the drawings:
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
Figure labelled notation: 1, coarse filter; 2, stop valve; 3, centrifugal pump; 4, transfer valve; 5, nitrogen inlet; 6, Pressure gauge; 7, twin filter; 8, blowoff valve; 9, box-type container; 10, electric heater; 11, temperature measurer; 12, particle collector; 13, return duct; 14, pump is to unit; 15, reflux unit; 16, unit pipeline; 17, cleaning hose.
(5) detailed description of the invention:
Below in conjunction with accompanying drawing illustrated embodiment, the technical solution of the utility model is described further.
The utility model set lubricating oil system pipeline is clean comprises that with oil flushing equipment pump is to unit 14 and reflux unit 15.A coarse filter 1 is installed on the sled piece of described pump to unit 14, and (filtering accuracy is chosen as 400 μ m～500 μ m), stainless steel centrifugal pump 3 (operating pressure 0.3MPa～0.8MPa, a flow 40m
3/ h～80m
3(filtering accuracy is chosen as 5 μ m～120 μ m) to/h) He one twin filter 7, between described coarse filter 1 and centrifugal pump 3, pass through pipeline connection between described centrifugal pump 3 and twin filter 7, a stop valve 2 is respectively installed on the import and export pipeline of described centrifugal pump 3, on the export pipeline of centrifugal pump 3, (after being positioned at stop valve 2) is also provided with a Pressure gauge 6 and a nitrogen interface 5, described twin filter 7 is by transfer valve 4 alternate conduction, and the export pipeline of twin filter 7 is communicated with cleaning hose 17 (flange-connection stainless steel metal flexible pipe); Box-type container 9 (1.5m are installed on the sled piece of described reflux unit 15
3～2.5m
3), the inner below of described box-type container 9 is provided with an electric heater 10, the temperature measurer 11 of a monitoring internal temperature is installed on box-type container 9, box-type container 9 bottoms are provided with a blowoff valve 8 (DN25), (measurement category is chosen as 1 μ m～450 μ and m) is located in the inlet ductwork of box-type container 9 particle collector 12, and this inlet ductwork is communicated with return duct 13 (flange-connection stainless steel metal flexible pipe); The outlet of described box-type container 9 is communicated with the import of coarse filter 1 by pipeline (DN65～DN100 flange-connection stainless steel metal flexible pipe), the unit pipeline 16 of set lubricating oil system is communicated between return duct 13 and cleaning hose 17, thereby realize clean and oil flushing, as shown in Figure 1.
Adopt above-mentioned set lubricating oil system pipeline method step clean and that oil flushing equipment carries out the outer pickling separately of unit and oil flushing to the field erected unit pipeline 16 of set lubricating oil system as follows:
One, pickling separately.
1, in unit installation, scene no longer includes after weld job, and field erected lubricating oil system unit pipeline 16 is split out, and the visible welding slag of manual cleanup and burr, clean out pipeline flushing one by one with jetting machine, checks and confirm no-sundries in pipe.
2, the unit pipeline 16 use brackets after qualified are on inspection erected level connection joint, pipeline position should be higher than box-type container 9, and itself and pump are linked to be to loop to unit 14 and reflux unit 15 with return duct 13 and cleaning hose 17, now twin filter 7 and particle collector 12 are removed from loop, cleaning hose 17 is directly connected the export pipeline of centrifugal pump 3.
3, connect power supply, it is forward and reverse that unloaded confirmation motor rotates.
4, whether in box-type container 9, add clean water, opening centrifugal pump 3 circular tests has leakage.
5, in box-type container 9, add respectively on request corresponding degreaser, pickle and neutralizer (liquid level be box-type container 9 degree of depth 3/4), start centrifugal pump 3 and carry out circulation flushing.
Degreaser, pickle and neutralizer formula, washing time and temperature requirement are as follows:
Finally use clear water (liquid level be box-type container 9 degree of depth 3/4) to rinse, check pipeline inner surface with PH test paper, when PH=7 qualified.
6, clean qualified after, unit pipeline 16 is split out to loop, the water of each hydraulic unit in dump circuit, clean out impurity and moisture content in each hydraulic unit, the compressed air that passes into purification purges each hydraulic unit and unit pipeline 16 inside, within 5 minutes, finds that free from admixture and moisture content are qualified at the mouth of pipe of unit pipeline 16 with calico target practice inspection.
Two, independent oil flushing.
1, after the moisture content impurity in loop is cleaned out, unit pipeline 16 is reclosed in return duct 13 and cleaning hose 17, make unit pipeline 16 and pump form loop to unit 14 and reflux unit 15, now the twin filter 7 of dismounting and particle collector 12 are accessed to the original position in loop.
2, in box-type container 9, add flushing oil (box-type container 9 degree of depth that liquid level is 4/5), open centrifugal pump 3 circulation flushing unit pipelines 16.
3, opening electric heater 10, colds and heat succeed each other and heats flushing oil, and oil temperature is controlled between 35 DEG C～65 DEG C automatically.
4, in oil flushing process, pass into nitrogen (pressure of nitrogen is 0.8MPa～1.0MPa) from nitrogen inlet 5, often logical 5min stops 15min and hockets, and depending on the clean situation of unit pipeline 16, repeats nitrogen injection 20 times～30 times.
5, in non-stop-machine situation, switch the conducting of duplex strainer 7 by transfer valve 4, within every 4 hours, clean the screen pack of filter of once stopping using, in the time that in screen pack, impurity tails off, progressively extend cleaning room every, until cleaning in every 24 hours is once.
6, when being checked through impurity in screen pack when little, utilize particle collector 12 to check the Cress situation of lubricating oil, dustiness is qualified while reaching the requirement of counter shop instruction.
7, set lubricant oil station and set lubricant oil inlet/outlet pipe line justification clean qualified after, unit pipeline 16 is returned in the lubricating oil system of unit, utilize the petrol station of unit to continue flush cycle system, until oil testing is qualified.
When can clean flushing unit pipeline 16 at the scene, set lubricant oil station and inlet/outlet pipeline clean carry out, the lubricating oil station that is communicated with unit with metal hose forms loop, carry out self-loopa flushing, with high pressure cleaning pump strong cleaner group lubricating oil inlet/outlet pipeline, then pass into compression purify air purge dry, and with after calico target practice passed examination, paste transparent rubberized fabric sealing.
In above-mentioned clean and flushing process, the force value in unit pipeline 16 is controlled at 0.3MPa～0.8MPa (monitoring by Pressure gauge 6).
Claims (4)
1. set lubricating oil system pipeline cleans and oil flushing equipment, it is characterized in that: comprise that pump is to unit (14) and reflux unit (15), described pump comprises the coarse filter (1) by pipeline connection to unit (14), centrifugal pump (3) and fine filtrator, between described coarse filter (1) and centrifugal pump (3), on pipeline between described centrifugal pump (3) and fine filtrator, be equipped with stop valve (4), on pipeline between centrifugal pump and fine filtrator, be also provided with nitrogen inlet (5) and Pressure gauge (6), the export pipeline of described fine filtrator is communicated with cleaning hose (17), described reflux unit (15) comprises box-type container (9), in described box-type container (9), be provided with electric heater (10), box-type container (9) is provided with temperature measurer (11), the bottom of box-type container (9) is provided with blowoff valve (8), the inlet ductwork of described box-type container (9) is communicated with return duct (13), and particle collector (12) is set in described inlet ductwork, the outlet of described box-type container (9) communicates by pipeline with the import of coarse filter (1), is unit pipeline (16) on-position between described return duct (13) and cleaning hose (17).
2. set lubricating oil system pipeline according to claim 1 cleans and oil flushing equipment, it is characterized in that: described fine filtrator is duplex strainer (7), described duplex strainer (7) is controlled alternate conduction by transfer valve (4).
3. set lubricating oil system pipeline according to claim 2 cleans and oil flushing equipment, it is characterized in that: the filtering accuracy of described coarse filter (1) is 400 μ m～500 μ m, the filtering accuracy of described duplex strainer (7) is 5 μ m～120 μ m.
4. and oil flushing equipment clean according to the set lubricating oil system pipeline described in any one in claim 1～3, is characterized in that: the measurement category of described particle collector (12) is 1 μ m～450 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197124.9U CN203791277U (en) | 2014-04-22 | 2014-04-22 | Cleaning and oil flushing device for lubricating oil system pipeline of machine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197124.9U CN203791277U (en) | 2014-04-22 | 2014-04-22 | Cleaning and oil flushing device for lubricating oil system pipeline of machine set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203791277U true CN203791277U (en) | 2014-08-27 |
Family
ID=51373552
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420197124.9U Expired - Lifetime CN203791277U (en) | 2014-04-22 | 2014-04-22 | Cleaning and oil flushing device for lubricating oil system pipeline of machine set |
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| Country | Link |
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| CN (1) | CN203791277U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949447A (en) * | 2014-04-22 | 2014-07-30 | 中国石油天然气第六建设公司 | Cleaning and oil flushing device and method for unit lubricating oil system pipeline |
| GR20160100415A (en) * | 2016-07-28 | 2018-03-30 | Σταυρος-Χρηστος Αλεξιου Βασιλικος | Cleaning system practicable for hydraulic networks |
| CN108097676A (en) * | 2017-11-28 | 2018-06-01 | 飞潮（无锡）过滤技术有限公司 | A kind of full-automatic cleaning container degreasing machine |
| CN108237124A (en) * | 2016-12-26 | 2018-07-03 | 中冶天工集团天津有限公司 | A kind of hydraulic system sectional flushing system |
| CN112916526A (en) * | 2021-01-28 | 2021-06-08 | 广州文冲船厂有限责任公司 | Oil feeding device for ship pipeline |
-
2014
- 2014-04-22 CN CN201420197124.9U patent/CN203791277U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949447A (en) * | 2014-04-22 | 2014-07-30 | 中国石油天然气第六建设公司 | Cleaning and oil flushing device and method for unit lubricating oil system pipeline |
| GR20160100415A (en) * | 2016-07-28 | 2018-03-30 | Σταυρος-Χρηστος Αλεξιου Βασιλικος | Cleaning system practicable for hydraulic networks |
| GR1009260B (en) * | 2016-07-28 | 2018-03-30 | Σταυρος-Χρηστος Αλεξιου Βασιλικος | Cleaning system practicable for hydraulic networks |
| CN108237124A (en) * | 2016-12-26 | 2018-07-03 | 中冶天工集团天津有限公司 | A kind of hydraulic system sectional flushing system |
| CN108097676A (en) * | 2017-11-28 | 2018-06-01 | 飞潮（无锡）过滤技术有限公司 | A kind of full-automatic cleaning container degreasing machine |
| CN112916526A (en) * | 2021-01-28 | 2021-06-08 | 广州文冲船厂有限责任公司 | Oil feeding device for ship pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 541004 No. 7 West Ming Road, Qixing District, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: CHINA PETROLEUM NATURAL GAS SIXTH CONSTRUCTION CO.,LTD. Address before: 541004 No. 7 West Ming Road, Qixing District, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: China National Petroleum Sixth Construction Co. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200930 Address after: 100000 Beijing City, Xicheng District shop kang six Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA PETROLEUM NATURAL GAS SIXTH CONSTRUCTION Co.,Ltd. Address before: 541004 No. 7 West Ming Road, Qixing District, Guilin, the Guangxi Zhuang Autonomous Region Patentee before: CHINA PETROLEUM NATURAL GAS SIXTH CONSTRUCTION Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |