CN201014212Y - Pipeline leakage monitoring and safety early warning test system - Google Patents
Pipeline leakage monitoring and safety early warning test system Download PDFInfo
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- CN201014212Y CN201014212Y CNU2007201036877U CN200720103687U CN201014212Y CN 201014212 Y CN201014212 Y CN 201014212Y CN U2007201036877 U CNU2007201036877 U CN U2007201036877U CN 200720103687 U CN200720103687 U CN 200720103687U CN 201014212 Y CN201014212 Y CN 201014212Y
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Abstract
The utility model discloses a pipeline especially oil and gas transmission pipeline leak testing and the experimental pipeline leakage monitoring and the safe early warning test system of relevant early warning technique relate to the measurement and the pipe-line system technical field that the measurement of mechanical vibration or sound wave is strikeed. The system is provided with a buried annular pipeline [53] which is subjected to antiseptic treatment and added with cathodic protection and is connected with a storage tank region [2] and a pump [9] to form a closed loop and an annular optical fiber [54] buried in the same ditch, wherein the annular pipeline [53] is provided with two lead-out branch pipes and a plurality of relief valve wells, the annular pipeline is provided with a plurality of valves, flowmeters and pressure meters, one lead-out branch pipe is provided with an air compressor [26] and a filter [6], the other lead-out branch pipe is emptied, and the two lead-out branch pipes are provided with a plurality of valves, pressure meters and a gas flowmeter; the pressure sensor and the remote transmission cable of the loop field instrument transmit the pressure signal to the central control room.
Description
Technical field
The utility model is the particularly line leakage and the safe early warning test system of oil and gas pipeline Leak testtion and the test of relevant early warning technology of pipeline.Relate to the measurement of mechanical vibration or sound wave, the measurement and the pipe-line system technical field of impact.
Background technique
Oil and gas pipes occupy critical positions as the lifeblood of industrial economy in national economy.Because the third party that defective, burn into natural aging and the external force of pipeline itself cause destroys, and has caused the loss of oil gas product, environmental pollution and personnel's injury.In view of this, the pipeline transport industry often will be taken out very big human and material resources, the research of financial resources input, transformation, construction.Along with the continuous development of pipeline industry, for the safe operation of service conduit, pipeline operational monitoring technology is also in continuous development, the attention that always is subjected to the various countries scientific worker as the Leak testtion and the safe early warning technology of pipe monitoring core.
Have multiple pipeline leakage testing technology and method at present both at home and abroad, the variation that first kind of pipe leakage on-line monitoring technique mainly is based on each Operational Limits of pipeline that loss caused of tube fluid medium detects pipe leakage, variation as pipeline Operational Limitss such as the pressure by monitoring pipeline input end and output terminal, flows, can judge pipeline and whether leak, also can determine the position that pipe leakage takes place simultaneously.Chinese invention patent application number 96121000.1,99107241.3 and Chinese utility application number 02235420.4 etc. has been done very detailed narration to the content of such technical field, because rely on the variation of the fluid parameter of pipe leakage generation, it is sudden than gross leak that this method can only detect pipeline.Second kind is destroyed for detect the third party that pipeline suffers based on the detection to sound that pipeline damage produced and oscillating signal, and positions, and Chinese utility model patent number 200320100537.2 grades have been done detailed description to this type of technology.
In recent years along with development of fiber technology, Fibre Optical Sensor also begins application and pipeline leakage testing and safe early warning field, mainly be divided into the principle of Fibre Optical Sensor interference type distributed optical fiber sensory technique and backscattering type distributing optical fiber sensing technology are arranged, interference type mainly is represented as Chinese invention patent application number 200410020046.6,200410016038 and the ZL patent No. 99814375.8, scatter-type mainly is represented as Chinese invention patent application number 02145502.3.
Though these technology are all claimed the Leak testtion that can solve oil and gas pipes and the problem of safe early warning, but these technology mostly are the system that obtains by theory analysis in the laboratory, pipeline is as large-scale wire underground structure, oil property, objective factor such as geographical environment has influenced the application stability and the reliability of various systems greatly on the way, and directly testing precision and practicability is caused material impact.Oil and gas pipeline is as national important energy main artery, can't directly provide various Leak testtion and safety pre-warning system to test destructive test environment such as needed true leakage, boring, therefore be badly in need of the practicability general-utility test platform of a test, the various pipeline leakage testings of evaluation and safe early warning technology.
The model utility content
The purpose of this utility model is that designing a kind of can be the test line leakage and the safe early warning test system accurate, reliable, true to nature of oil and gas pipeline Leak testtion and relevant early warning technology test.
The experiment porch of the utility model is mainly used in the little leak detection technology of pipeline that comprises, astable fluid pipeline leakage testing technology, detects and distributing optical fiber sensing technology, sound based on the oil and gas pipeline leakage detection technique of technology such as sound wave, suction wave; The pilot scale scale-up of technique direction pipeline safety early warning systems such as vibrating sensing technology, geophone technology and grating fibers.
To this; formation of the present utility model as shown in Figure 1; equally comprise storage tank field 2 with prior art; the circulating line 53 that pump 9 and pipeline constitute; default leakage point and test instrumentation; it is characterized in that being provided with bury ground do preservative treatment and add cathodic protection be linked as the circulating line 53 of closed loop and the optical fibre ring 54 that Tong Gou buries underground with storage tank field 2 and pump 9; circulating line 53 has two to draw arm and a plurality of valve pit of releasing; a plurality of valves are installed on circulating line; flowmeter; pressure instrument; one draws air compressor 26 is installed on the arm; filter 6; another is drawn arm emptying and draws two a plurality of valves are installed on the arm; a pressure instrument and a gas flowmeter, the pressure transducer of circuit field instrument connects the teletransmission cable signal is reached central control room.
Specifically be to have storage tank field 2 outlets of level meter 1 to be connected in series valve 4 successively by pipeline, pressure gauge 5, filter 6, pressure transmitter 7, pressure gauge 8, pump 9, pressure transmitter 10, pressure gauge 11, one-way valve 12, valve 13, fluid flowmeter 14, valve 15, valve 27, the valve pit 28 of releasing, the valve pit 33 of releasing, the valve pit 38 of releasing, valve 43, valve 44, pressure transmitter 48, pressure gauge 49, behind the flowmeter 51, return the inlet of receiving storage tank field 2, at valve 15, arm is drawn in opening sealing-in one between the valve 27, draw at this and to be connected in series valve 16 on arm successively, gas flowmeter 17, valve 18, knock out drum 19, one-way valve 21, valve 22, pressure transmitter 23, pressure gauge 24 and compressor 26, at valve 43, arm is drawn in opening sealing-in one between the valve 44, draws at this and is connected in series valve 45 on arm successively, pressure transmitter 46, pressure gauge 47, connect blow-down pipe behind the flowmeter 50.Circulating line 53 buries ground, does preservative treatment and be added with cathodic protection, and ground pump 9 will be done insulation with pressure gauge, flowmeter connecting tube and handle.
This pipeline leakage testing and safe early warning test system are the binomial trial platform of liquid and gas, and the liquid pilot medium adopts water, and the gas test medium adopts pressurized air, in order to simulation product oil and natural operating conditions.Simultaneously in order to enlarge the scope of test, the reservation oil storage tank interface 3 that bypass is arranged between storage tank field 2 and valve 4, the reservation gas holder interface 25 of bypass is arranged between pressure gauge 24 and compressor 26, and system reserves the construction space and the interface condition of further oil storage tank and gas holder.Liquid pump and each cover of compressor are adopted in power supply, and one of wet pit also can be built again in the water source.
Wherein store tank field 2 and be water pot; Release and be connected to pressure transmitter 29, pressure gauge 30, bypass on the circulating line 53 in the valve pit 28 valve 31, valve 32 are arranged; Release and be connected to pressure transmitter 36, pressure gauge 37, bypass on the circulating line 53 in the valve pit 33 valve 34, valve 35 are arranged; Release and be connected to pressure transmitter 41, pressure gauge 42, bypass on the circulating line 53 in the valve pit 38 valve 39, valve 40 are arranged.
Comprise different stranding forms such as direct-burried, silicone tube, armouring according to the laying in one ditch of pipeline communication optical cable construction standard, optical fibre ring 54 is taked the embedding manner of armouring and silicone tube simultaneously in test system, consider the immature of Fibre Optical Sensor simultaneously, also adopt direct-buried mode to lay non-armouring optical cable with ditch, be equipped with the Fibre Optical Sensor vibration-testing apparatus, in order to the vibrating sensing performance of test system.
Be the simulated field actual conditions, all test pipeline sections are buried-pipe laying.The actual demand of releasing and testing when considering simulated leakage sets up vent position a plurality of at the middle need of circuit, builds valve pit and also Drainage valve is installed, thereby realize the simulation of different leakage rates by the aperture of control valve.Consider numerous in the world leakage detection methods, high-precision flow, temperature, pressure instrument need be installed, and teletransmission is to CCC in the import and export of pipeline based on flow, temperature, pressure modeling.
The background noise that situations such as vehicle and pedestrian produce when simulating the pipeline highway crossing, native system leave sufficient test site in order to the various environmental working conditions of simulation in design.
For the better protection pipeline, when testing conduit was destroyed simultaneously, the situation of change of cathodic protection potential should also be added with cathodic protection current at the two ends of pipeline.
It is standby that wet pit is also set up in storage tank field 2, and as retaining, the key facility of service cycling use of water in order to guarantee the normal operation of circuit, has carried out necessary antiseepage to wet pit and handled.Consider that landscaping handles the pond as the sight spot when not experimentizing.
In order to improve the operating pressure of pipeline, in experiment circuit run duration meeting long-term control outlet valve aperture, operation builds the pressure.Adopt transformer and relevant power supply unit to provide power for the pump and the compressor of circuit.
The precision and the renewal frequency of all experiment in-situs tester tables of native system all adopt higher level, and except on-the-spot primary instrument directly the reading, other instrument parameters all need to carry out automatic data acquisition and teletransmission to control centre.
Pipeline leakage testing and the technological process of safe early warning test system comprise: (1) water inlet (stream journey; (2) self-loopa flow process; (3) the multiple spot flow process of releasing.The experiment content that circuit can be finished has: the Leak testtion experiment of liquid (gas) and the system testing and the optimization work of pipe safety prewarning.
Pipeline leakage testing and the technological process of safe early warning test system are: 9 pressurizations enter test pipeline section 53 to the liquid that comes out from storage irrigated area 2 through pump, 28,33,38 3 valve pits of valve pit are released by releasing, in like manner gas enters knock out drum 19 after suppressing by compressor 26, also enter the test pipeline section of circulating line 53 then, also release by these three valve pits.Data such as the pressure of circuit operation, flow detect and pass to Surveillance center by the instrument of importing and exporting.When carrying out the safe early warning test, can detect oscillating signal and this threat signal is reached Surveillance center by optical cable 54 and carry out the terminal demodulation with pipeline companion row.Can also the situation of breaking ground that vibration transducer detects the pipeline top be installed on the pipeline 53 by giving.
As seen, native system has solved the platform problem that pipeline leakage testing and safe early warning are tested perfectly, time of fire alarming, Location accuracy, rate of false alarm, the rate of failing to report of energy test for leaks detection system, and assess accurate, reliable, true to nature.
Description of drawings
Fig. 1 pipeline leakage testing and safe early warning test system pie graph
Fig. 2 pipeline and optical cable bury ground key plan (the A-A cross section view of Fig. 1)
Wherein 1-level meter 2-stores the tank field
3-reserves oil storage tank interface 4-valve
5-pressure gauge 6-filter
7-pressure transmitter 8-pressure gauge
9-pump 10-pressure transmitter
11-pressure gauge 12-one-way valve
13-valve 14-flowmeter
15-valve 16-valve
17-pressure gauge 18-valve
19-knock out drum 20-sample tap
21-one-way valve 22-valve
23-pressure transmitter 24-pressure gauge
25-reserves gas holder and connects the 26-compressor
The 27-valve 28-valve pit of releasing
29-pressure transmitter 30-pressure gauge
31-valve 32-valve
The 33-valve pit 34-valve of releasing
35-valve 36-pressure transmitter
The 37-pressure gauge 38-valve pit of releasing
39-valve 40-valve
41-pressure transmitter 42-pressure gauge
43-valve 44-valve
45-valve 46-pressure transmitter
47-pressure gauge 48-pressure transmitter
49-pressure gauge 50-flowmeter
51-flowmeter 52-gas drain
53-circulating line 54-optical cable
Embodiment
Embodiment: also the utility model is further explained with this example embodiment of the present utility model to be described.This example is an experiment circuit, and it constitutes as shown in Figure 1.Test circulating line 53 long 1 kms of system, diameter is Φ 159mm, be coated with the epoxy powder anti-corrosion coating outward, be embedded in underground 1.5m (pipeline center is to ground surface) depths, select 6 core single mode sensing optic cable FD6-B1.1-ZU-A, GYSTA53-6B1 armouring cable, the LSZH six core single mode optical distribution cables (being through in the silicon core pipe 40/33 type that silicone tube selects for use Cangzhou jewel plastics Co., Ltd to produce) of the production of the crucial Photoelectron Corp. in Guangzhou simultaneously for use apart from right side, pipeline upper edge 20cm place laying in one ditch optical cable 54; The capacity of storage tank field 2 is 60m
3Arch-roof tank; Pump 9 is selected German Bao Man HC232-100 type two screw pump for use; Compressor 26 is selected VF-3.5/7 type piston type air compressor for use; Knock out drum 19 is of a size of Φ 55 * 2000mm, and the valve pit 28,33,38 of releasing is of a size of Φ 1500mm, dark 2m; Flowmeter 14 and flowmeter 51 select the AW2003-K type; Flowmeter 17 and flowmeter 50 select the AW2003-V type; The SMC/HBC series that valve 4,13,15,16,18,22,27,31,32,34,35,39,40,43,44,45 selects the Tianjin second General valve factory to produce; Pressure transmitter 7,10,23,29,36,41,46,48 is selected the 3051S series transmitter of U.S. ROSEMOUNT for use; Pressure gauge 8,11,30,37,42,47,49 is selected the shatter-proof diaphragm of YTNP-100 for use; One- way valve 12,21 selects the NR-020FV model; Filter 6 selects the HBYPH type of Xinxiang City kylin machine-building Co., Ltd.
Whole pipe Leak testtion and safe early warning test system mainly can be finished following technological process: (1) water inlet (stream journey, (2) self-loopa flow process, (3) multiple spot flow process of releasing.Substantially can simulate pipeline working condition when normally moving.
Because pipeline can excavate operation, carry out the simulation of true drilling hole of oil stolen process, therefore can also estimate experimental evaluation work based on the pipeline early warning system of sound and vibration by this test loop path.Since in pipe-line construction according to pipeline communication optical cable safe construction standard, with ditch pre-buried armouring (GYTA53, GYTA5353), wear silicone tube (40/33), direct-burried (GYTA, GYFTA) three kinds of optical cables of burying form, different stranding modes underground, contained active service and all optical cables of newly-built pipeline are selected for use and embedding manner, the platform of experiment and test can be provided for various pipeline safety early warning systems based on optical fiber.
The experiment content that pipeline leakage testing and safe early warning test system can be finished has the Leak testtion experiment of liquid (gas) and the test and the optimization work of pipeline safety early warning system.Can be by special-purpose leak detecting device instrument being installed at the import and export of pipeline or, detecting leakage signal by collection to existing pressure, flow instrument signal.By releasing, the judgement of the when and where of the incident of releasing is estimated the degree of being practical of this Leak testtion software by the software that compares Leak testtion simultaneously at default valve pit place.Can be implemented on the true oil and gas pipes difficult problem of can not opening releasing, can't the checking system performance index by this system, can provide an objective test platform for time of fire alarming, Location accuracy, rate of false alarm, the rate of failing to report of assessment leak detection system.
Native system is through to little leak detection technology, astable fluid pipeline leakage testing technology, detect and distributing optical fiber sensing technology, sound based on the oil and gas pipeline leakage detection technique of technology such as sound wave, suction wave; The pilot scale scale-up of technique direction pipeline safety early warning systems such as vibrating sensing technology, geophone technology and grating fibers, proof can satisfy the pipeline leakage testing and the safe early warning test request of these technology fully, can provide an objective test platform for the time of fire alarming, Location accuracy, rate of false alarm, rate of failing to report, threat incident early warning rate etc. of assessment leak detection system, and assess accurate, reliable, true to nature.
Claims (5)
1. the particularly line leakage and the safe early warning test system of oil and gas pipeline Leak testtion and relevant early warning technology test of a pipeline, comprise storage tank field [2], the circulating line [53] that pump [9] and pipeline constitute, default leakage point and test instrumentation, it is characterized in that being provided with the circulating line [53] that is linked as closed loop with storage tank field [2] and pump [9] of doing preservative treatment and adding cathodic protection that buries ground and reach the optical fibre ring of burying underground with ditch [54], circulating line [53] has two to draw arm and a plurality of valve pit of releasing, a plurality of valves are installed on circulating line, flowmeter, pressure instrument, one draws air compressor [26] is installed on the arm, filter [6], another is drawn arm emptying and draws two a plurality of valves are installed on the arm, a pressure instrument and a gas flowmeter; The pressure transducer at circuit scene connects the teletransmission cable to central control room.
2. line leakage according to claim 1 and safe early warning test system, storage tank field [2] outlet of [1] is connected in series valve [4] successively by pipeline to it is characterized in that level meter is arranged, pressure gauge [5], filter [6], pressure transmitter [7], pressure gauge [8], pump [9], pressure transmitter [10], pressure gauge [11], one-way valve [12], valve [13], fluid flowmeter [14], valve [15], valve [27], the valve pit [28] of releasing, the valve pit [33] of releasing, the valve pit [38] of releasing, valve [43], valve [44], pressure transmitter [48], pressure gauge [49], behind the flowmeter [51], return the inlet of receiving storage tank field [2], in valve [15], arm is drawn in opening sealing-in one between the valve [27], draw at this and to be connected in series valve [16] on arm successively, gas flowmeter [17], valve [18], knock out drum [19], one-way valve [21], valve [22], pressure transmitter [23], pressure gauge [24] and compressor [26], in valve [43], arm is drawn in opening sealing-in one between the valve [44], draws at this and is connected in series valve [45] on arm successively, pressure transmitter [46], pressure gauge [47], flowmeter connects blow-down pipe after [50].
3. line leakage according to claim 1 and 2 and safe early warning test system, it is characterized in that between storage tank field [2] and valve [4], having the reservation oil storage tank interface [3] of bypass, the reservation gas holder interface [25] of bypass is arranged between pressure gauge [24] and compressor [26].
4. line leakage according to claim 1 and 2 and safe early warning test system, it is characterized in that being connected on the circulating line [53] in the described valve pit of releasing [28] pressure transmitter [29], pressure gauge [30], bypass has valve [31], valve [32]; Be connected to pressure transmitter [36], pressure gauge [37], bypass on the circulating line [53] in the described valve pit of releasing [33] valve [34], valve [35] are arranged; Be connected to pressure transmitter [41], pressure gauge [42], bypass on the circulating line [53] in the described valve pit of releasing [38] valve [39], valve [40] are arranged.
5. line leakage according to claim 1 and safe early warning test system, it is characterized in that optical fibre ring [54] takes the embedding manner of armouring and silicone tube simultaneously, also adopt direct-buried mode to lay non-armouring optical cable, be equipped with the Fibre Optical Sensor vibration-testing apparatus with ditch.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201036877U CN201014212Y (en) | 2007-03-01 | 2007-03-01 | Pipeline leakage monitoring and safety early warning test system |
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| CNU2007201036877U CN201014212Y (en) | 2007-03-01 | 2007-03-01 | Pipeline leakage monitoring and safety early warning test system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101255952B (en) * | 2007-03-01 | 2012-05-30 | 中国石油天然气股份有限公司 | Pipeline Leakage Monitoring and Safety Early Warning Test System |
| CN101598263B (en) * | 2009-07-10 | 2012-11-21 | 东北大学 | Portable pipeline leakage detection method and device |
| CN103148346A (en) * | 2013-03-26 | 2013-06-12 | 北京交通大学 | Drain diffusion experimental platform for buried oil pipeline |
| CN103744360A (en) * | 2013-12-04 | 2014-04-23 | 济南鲁纺仪佳自控技术有限公司 | Oil field oil loading point oil storage and transportation wireless monitoring system and method |
| US20150041392A1 (en) * | 2012-02-21 | 2015-02-12 | Tsinghua University | Method and system using micro/nano bubbles for enhanced in situ remediation of polluted groundwater |
| CN105589391A (en) * | 2016-03-14 | 2016-05-18 | 刘满元 | Integrated control device which prevents circulating pipelines from leaking |
| CN106018561A (en) * | 2016-05-13 | 2016-10-12 | 中国石油大学(华东) | System and method for measuring sound wave amplitude attenuation coefficients in different pipeline structures |
| CN107766600A (en) * | 2016-08-22 | 2018-03-06 | 中国石油天然气股份有限公司 | Method and device for calculating reliability of gas compression station |
| CN108180398A (en) * | 2017-12-28 | 2018-06-19 | 北京市燃气集团有限责任公司 | A kind of anti-damage from third-party detection method of gas pipeline and detecting system |
| CN108591838A (en) * | 2018-05-02 | 2018-09-28 | 常州大学 | A kind of Buried Oil Pipelines Release and dispersion migration experiment porch based on light transmission method |
| CN109373202A (en) * | 2018-12-18 | 2019-02-22 | 中国石油天然气集团公司 | A kind of gas pipeline terminal main line pressure drop rate monitoring, alarming interlock |
| CN110118308A (en) * | 2019-04-24 | 2019-08-13 | 中国石油天然气股份有限公司 | Pipeline corrosion condition detection device and method |
| RU2763629C1 (en) * | 2021-05-27 | 2021-12-30 | Публичное акционерное общество «Татнефть» имени В.Д. Шашина | Method for monitoring the technical condition of the protective casing and the main pipeline equipped with cathodic protection |
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- 2007-03-01 CN CNU2007201036877U patent/CN201014212Y/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101255952B (en) * | 2007-03-01 | 2012-05-30 | 中国石油天然气股份有限公司 | Pipeline Leakage Monitoring and Safety Early Warning Test System |
| CN101598263B (en) * | 2009-07-10 | 2012-11-21 | 东北大学 | Portable pipeline leakage detection method and device |
| US20150041392A1 (en) * | 2012-02-21 | 2015-02-12 | Tsinghua University | Method and system using micro/nano bubbles for enhanced in situ remediation of polluted groundwater |
| CN103148346A (en) * | 2013-03-26 | 2013-06-12 | 北京交通大学 | Drain diffusion experimental platform for buried oil pipeline |
| CN103744360A (en) * | 2013-12-04 | 2014-04-23 | 济南鲁纺仪佳自控技术有限公司 | Oil field oil loading point oil storage and transportation wireless monitoring system and method |
| CN103744360B (en) * | 2013-12-04 | 2016-03-02 | 济南鲁纺仪佳自控技术有限公司 | Oil field charge of oil point accumulating oil wireless supervisory control system and method |
| CN105589391B (en) * | 2016-03-14 | 2017-12-08 | 刘满元 | A kind of integrated control device for preventing circulating line leakage |
| CN105589391A (en) * | 2016-03-14 | 2016-05-18 | 刘满元 | Integrated control device which prevents circulating pipelines from leaking |
| CN106018561A (en) * | 2016-05-13 | 2016-10-12 | 中国石油大学(华东) | System and method for measuring sound wave amplitude attenuation coefficients in different pipeline structures |
| CN106018561B (en) * | 2016-05-13 | 2018-11-20 | 中国石油大学(华东) | The measuring system and method for magnitudes of acoustic waves attenuation coefficient in different pipeline configurations |
| CN107766600A (en) * | 2016-08-22 | 2018-03-06 | 中国石油天然气股份有限公司 | Method and device for calculating reliability of gas compression station |
| CN108180398A (en) * | 2017-12-28 | 2018-06-19 | 北京市燃气集团有限责任公司 | A kind of anti-damage from third-party detection method of gas pipeline and detecting system |
| CN108180398B (en) * | 2017-12-28 | 2019-06-11 | 北京市燃气集团有限责任公司 | A kind of anti-damage from third-party detection method of gas pipeline and detection system |
| CN108591838A (en) * | 2018-05-02 | 2018-09-28 | 常州大学 | A kind of Buried Oil Pipelines Release and dispersion migration experiment porch based on light transmission method |
| CN109373202A (en) * | 2018-12-18 | 2019-02-22 | 中国石油天然气集团公司 | A kind of gas pipeline terminal main line pressure drop rate monitoring, alarming interlock |
| CN110118308A (en) * | 2019-04-24 | 2019-08-13 | 中国石油天然气股份有限公司 | Pipeline corrosion condition detection device and method |
| CN110118308B (en) * | 2019-04-24 | 2021-03-09 | 中国石油天然气股份有限公司 | Pipeline corrosion condition detection device and method |
| RU2763629C1 (en) * | 2021-05-27 | 2021-12-30 | Публичное акционерное общество «Татнефть» имени В.Д. Шашина | Method for monitoring the technical condition of the protective casing and the main pipeline equipped with cathodic protection |
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