CN108168768B - Breakthrough of gas pressure test device and method - Google Patents

Breakthrough of gas pressure test device and method Download PDF

Info

Publication number
CN108168768B
CN108168768B CN201711182357.6A CN201711182357A CN108168768B CN 108168768 B CN108168768 B CN 108168768B CN 201711182357 A CN201711182357 A CN 201711182357A CN 108168768 B CN108168768 B CN 108168768B
Authority
CN
China
Prior art keywords
cylinder body
sample
breakthrough
gas
seal section
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.)
Active
Application number
CN201711182357.6A
Other languages
Chinese (zh)
Other versions
CN108168768A (en
Inventor
刘江峰
倪宏阳
宋帅兵
曹栩楼
浦海
茅献彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
Original Assignee
China University of Mining and Technology CUMT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China University of Mining and Technology CUMT filed Critical China University of Mining and Technology CUMT
Priority to CN201711182357.6A priority Critical patent/CN108168768B/en
Publication of CN108168768A publication Critical patent/CN108168768A/en
Priority to AU2018372341A priority patent/AU2018372341B2/en
Priority to RU2019118231A priority patent/RU2723232C1/en
Priority to PCT/CN2018/104638 priority patent/WO2019100812A1/en
Application granted granted Critical
Publication of CN108168768B publication Critical patent/CN108168768B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00Devices or apparatus for measuring differences of two or more fluid pressure values

Abstract

A kind of breakthrough of gas pressure test device disclosed by the invention, is related to Nuclear waste disposal technical field.The test device includes the cylinder body to contain sample, and the inner wall of cylinder body forms seal section, and described cylinder body one end is inlet end, and the other end is outlet side, and the inlet end is connected with air delivery device, and the outlet side is connected with gas controlling device.Breakthrough of gas pressure test device disclosed by the invention, seal section is processed on the inner wall of cylinder body, for with expansile sample, after water suction, sample expansion blockage seal section realizes sealing, so that sample and cylinder body are no longer smooth contact surface in the vertical direction, it avoids gas from breaking through from the interface of sample and cylinder body, effectively improves the accuracy of breakthrough of gas pressure testing results.

Description

Breakthrough of gas pressure test device and method
Technical field
The present invention relates to Nuclear waste disposal technical fields, and in particular to a kind of test high level radioactive waste repository padded coaming The device and method of breakthrough of gas pressure.
Background technique
In recent years, flourishing with national economy, energy shortage is increasingly becoming the serious problem that China is faced, in State increasingly payes attention to the utilization and development of nuclear energy.However the utilization of nuclear energy, a large amount of nuke rubbish will be generated, therefore at nuke rubbish It sets to have become and compels solving the problems, such as.
Disposition for high-level waste, generally accepted feasible program is that high-level waste is embedded in ground in international community at present In the good ground of lower 500~1000m depth: i.e. by high-level waste after curing process, filling, being stored at geological disposal In library, which is commonly referred to as " Hlw Geological Repository ", hereinafter referred to as " disposition library ".
Dispose library mentality of designing, be generally adopted by " more barrier systems ", including wall rock geology barrier, be based on bentonite Artificial barrier and waste storage container barrier as padded coaming.The high-level waste of glass solidification is encapsulated in special container In, this container is manufactured with materials such as very corrosion resistant high-grade alloy steel or copper;When disposition, solidify the week of container The good bentonite clay material of absorption property will also be filled by enclosing, and constitute multiple tracks " artificial barrier " in this way;In addition to this, there are also excellent " natural barrier ".High-level waste library is built in the stabilization geological stratification of several hundred meters of deep undergrounds (such as granite, clay rock, rock salt), Over time, the underground water in country rock will gradually be corroded into bentonite clay material from surrounding, and bentonite will gradually absorb water Expansion, so that the gap between bentonite block and between bentonite block and country rock is filled up, to play sealing function.With The evolution of time, due to complicated physical-chemical reaction in disposition library, gas will be generated gradually, these gases from The following aspects (1) metal can corrodes the hydrogen of generation in bentonite and groundwater environment;(2) microbial decomposition is led Cause organic matter corruption and the gases such as carbon dioxide, methane, nitrogen of generation;(3) hydrogen that radiation effects generates.With these gas The continuous generation of body, the air pressure disposed in library gradually rise, and the gas of accumulation will outwardly escape, and for breakthrough of gas pressure The test of force value usually carries out in triaxial pressure room at present, but since there are relatively smooth to connect between sample and device Contacting surface, and then cause measurement result inaccurate.
Therefore, in view of problem above, it is necessary to propose that one kind can accurately measure padded coaming breakthrough of gas pressure size Device and method, to avoid due to the feelings for causing test result inaccuracy between sample and cylinder body there are smooth contact surface Condition.
Summary of the invention
In view of this, the present invention proposes a kind of breakthrough of gas pressure test device, including the cylinder body to contain sample, institute The inner wall for stating cylinder body forms seal section, the setting of seal section, for expansile sample, after water suction, sample is swollen Swollen plug for seal section is realized sealing, so that being no longer in the vertical direction smooth contact surface between sample and cylinder body, is kept away Exempt from gas to break through from the interface of sample and cylinder body, effectively improves the accuracy of breakthrough of gas pressure testing results.
The breakthrough of gas pressure test device that purpose according to the present invention proposes, including the cylinder body to contain sample, institute Stating cylinder body one end is inlet end, and the other end is outlet side, and the inlet end is connected with air delivery device, and the outlet side is connected with gas Body monitoring device, the inner wall of the cylinder body form seal section, when test, are in close contact between sample and the inboard wall of cylinder block with close Envelope.
Preferably, the cylinder body inlet end, which is detachably fixed, is connected with pressure head, and air inlet is formed on the pressure head, described Air inlet connects air delivery device;The cylinder body outlet side, which is detachably fixed, is connected with pedestal, forms venthole on the pedestal, The venthole connects gas controlling device;The cylinder interior forms hollow cavity, and the sample is contained in hollow cavity, institute Seal section is stated to take shape on the inner wall of cylinder body and sample contacts.
Preferably, seal section height HtWith specimen height Hsample, cylinder diameter DtWith specimen finish DsampleJust like ShiShimonoseki System:
Preferably, the seal section is the equally distributed multiple groups groove of axial direction along cylinder body, and every group of groove is along inboard wall of cylinder block Setting in one week or subsection setup.
Preferably, the depth of each groove is 0.3mm, width 1mm, and the spacing between two adjacent groups groove is 4mm。
Preferably, the pressure head and pedestal have been separately formed protrusion, and the protrusion is embedded in cylinder body hollow cavity.
A kind of breakthrough of gas method for testing pressure, using above-mentioned test device, the test device include cylinder body, pressure head and Pedestal, the cylinder interior form hollow cavity, and sample is contained in hollow cavity, on the inner wall of the cylinder body and sample contacts at Type has seal section, and air inlet is formed on the pressure head, forms venthole on pedestal;
The test method the following steps are included:
Step 1: the sample made is put into cylinder body hollow cavity at seal section.
Step 2: increase the humidity of the test space, sample water swelling plug for seal section, until sealing.
Step 3: pressure head and pedestal are separately fixed to inlet end and the outlet side of cylinder body by bolt, formed on pressure head Air inlet connect with air delivery device, molding venthole is connect with gas controlling device on pedestal.
Step 4: gradually increasing the gas pressure of air inlet since 0, to monitor lasting air-flow at pedestal venthole When, then pressure at two ends difference is the breakthrough of gas pressure of sample.
Preferably, test space temperature is 20 DEG C.
Compared with prior art, a kind of test high level radioactive waste repository padded coaming breakthrough of gas pressure disclosed by the invention Device the advantages of be:
Breakthrough of gas pressure test device disclosed by the invention includes the cylinder body for containing sample, the inner wall molding of the cylinder body There is seal section, processes seal section on the inner wall of cylinder body, in this way, for expansile sample, after water suction, examination Sample expansion blockage seal section realizes sealing, so that sample and cylinder body are no longer in the vertical direction smooth contact surfaces, keeps away Exempt from gas to break through from the interface of sample and cylinder body, effectively improves the accuracy of breakthrough of gas pressure testing results.
Detailed description of the invention
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art Attached drawing needed in technical description does simple introduction, it is clear that, the accompanying drawings in the following description is only this hair Bright some embodiments, it will be clear to the skilled person that without creative efforts, may be used also Other accompanying drawings can also be obtained according to these attached drawings.
Fig. 1 is 1 sectional view 1 of embodiment.
Fig. 2 is 1 sectional view 2 of embodiment.
Fig. 3 is 2 sectional view 1 of embodiment.
Fig. 4 is 2 sectional view 2 of embodiment
Parts title representated by digital or letter in figure are as follows:
1, pressure head;2, bolt;3, protrusion;4, groove;5, sample;6, cylinder body;7, venthole;8, pedestal;9, air inlet; 10, hollow cavity.
Specific embodiment
A specific embodiment of the invention is described briefly with reference to the accompanying drawing.Obviously, described embodiment is only It is a part of the embodiments of the present invention, rather than whole embodiments, based on the embodiments of the present invention, ordinary skill people Member's every other embodiment obtained without making creative work, belongs to the scope of protection of the invention.
Fig. 1-Fig. 4 shows preferred embodiments of the present invention, has carried out detailed cut open to structure from different angles respectively Analysis.
Embodiment 1
Breakthrough of gas pressure test device as shown in Figs. 1-2 includes the cylinder body 6 to contain sample 5, and 6 one end of cylinder body is Inlet end, the other end are outlet side, and inlet end is connected with air delivery device, and outlet side is connected with gas controlling device, cylinder body 6 it is interior Wall forms seal section, and sealing segment structure is unlimited, be in close contact when meeting test, between 6 inner wall of 5 water swelling of sample and cylinder body with Sealing is Non-smooth surface contact surface between sample 5 and cylinder body 6.Wherein air delivery device can be inert gas, and gas-monitoring Device can be gas leak detection instrument or flowmeter.Different time intervals carry out gas prison when using gas leak detector It surveys, when gas continuously overflows, that is, can determine that gas is continuously broken through.And when flowmeter being used to carry out gas-monitoring, when detection gas When body flow increases suddenly, that is, it can determine that gas is continuously broken through.
Further, 6 inlet end of cylinder body has been bolted pressure head 1, and air inlet 9 is formed on pressure head 1, and air inlet 9 connects Air delivery device;6 outlet side of cylinder body has been bolted pedestal 8, and venthole 7 is formed on pedestal 8, and venthole 7 connects gas-monitoring Device.Hollow cavity 10 is formed inside cylinder body 6, sample 5 is contained in hollow cavity 10, and seal section takes shape in cylinder body 6 and connects with sample 5 On the inner wall of touching, 5 water swelling plug for seal section of sample is to seal.Wherein, pressure head 1 and pedestal 8 setting so that cylinder body 6 it is close It is more preferable to seal effect, and cylinder body 6 and the connection type of pressure head 1 and bottom 8 are unlimited, are bolted only wherein preferred embodiment.
Further, seal section height HtWith 5 height H of samplesample, 6 internal diameter D of cylinder bodytWith 5 diameter D of samplesampleJust like Lower relationship:
It is demonstrated experimentally that when place in this connection when, can be with plug for seal section, while again not after 5 water swelling of sample External rock mass can be caused to damage because expansive force is excessive.
Further, seal section is the equally distributed multiple groups groove 4 of axial direction along cylinder body 6, and every group of groove 4 is along cylinder body 6 Setting in wall one week or subsection setup.
Further, the depth of each groove 4 is 0.3mm, width 1mm, and the spacing between two adjacent groups groove 4 is 4mm。
Embodiment 2
Breakthrough of gas pressure test device as shown in Figure 3-4, remaining is same as Example 1, the difference is that:
Pressure head 1 and pedestal 8 have been separately formed protrusion 3, and protrusion 3 is embedded in 6 hollow cavity 10 of cylinder body.Wherein protrusion 3 It is used cooperatively with pressure head 1 and pedestal 8, facilitates the installation of sealing ring, so that the sealing effect of whole device is more preferable.
Breakthrough of gas pressure test device disclosed by the invention processes seal section on the inner wall of cylinder body 6, for swollen For the sample 5 of swollen property, after water suction, 5 expansion blockage seal section of sample realizes sealing, so that sample 5 and cylinder body 6 No longer it is smooth contact surface in the vertical direction, avoids gas from breaking through from the interface of sample 5 and cylinder body 6, effectively improve gas The accuracy of body breakthrough pressure test result.
The breakthrough of gas pressure test device of corresponding above-described embodiment, the present invention also propose a kind of breakthrough of gas pressure test Method, this method realized using the device of above-described embodiment, test method the following steps are included:
Step 1: the sample 5 made is put into 6 hollow cavity 10 of cylinder body at seal section.
Step 2: increase the humidity of the test space, 5 expansion blockage seal section of sample, until sealing.
Pressure head 1 and pedestal 8: being separately fixed at inlet end and the outlet side of cylinder body 6 by step 3 by bolt 2, on pressure head 1 Molding air inlet 9 is connect with air delivery device, and molding venthole 7 is connect with gas controlling device on pedestal 8.
Step 4: gradually increasing the gas pressure of air inlet 9 since 0, lasting to monitor at 8 venthole 7 of pedestal When air-flow, then pressure at two ends difference is the breakthrough of gas pressure of sample.
Further, test space temperature is 20 DEG C.
In conclusion breakthrough of gas pressure test device disclosed by the invention include contain sample cylinder body, cylinder body it is interior Wall forms seal section, processes seal section on the inner wall of cylinder body, in this way, absorbing water for expansile sample Later, sample expansion blockage seal section realizes sealing, so that sample is no longer smooth connect in the vertical direction with cylinder body Contacting surface avoids gas from breaking through from the interface of sample and cylinder body, effectively improves the accuracy of breakthrough of gas pressure testing results.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized and use the present invention. Various modifications to these embodiments mode will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit and scope of the present invention.Therefore, originally Invention is not intended to be limited to the embodiments shown herein, and is to fit to the principles and novel features disclosed herein phase Consistent widest scope.

Claims (7)

1. a kind of breakthrough of gas pressure test device, which is characterized in that including the cylinder body (6) to contain sample (5), the cylinder Body (6) one end is inlet end, and the other end is outlet side, and the inlet end is connected with air delivery device, and the outlet side is connected with gas Body monitoring device, the inner wall of the cylinder body (6) form seal section, and the seal section takes shape in cylinder body (6) and contacts with sample (5) Inner wall on, the seal section be along cylinder body (6) the equally distributed multiple groups groove (4) of axial direction, every group of groove (4) is along cylinder body (6) setting in inner wall one week or subsection setup, when test, close contact is between sample (5) and the cylinder body (6) inner wall to seal.
2. breakthrough of gas pressure test device according to claim 1, which is characterized in that cylinder body (6) inlet end can Disassembly is fixedly connected with pressure head (1), is formed air inlet (9) on the pressure head (1), and the air inlet (9) connects air delivery device; Cylinder body (6) outlet side, which is detachably fixed, to be connected with pedestal (8), is formed venthole (7) on the pedestal (8), it is described go out Stomata (7) connects gas controlling device;It is formed hollow cavity (10) inside the cylinder body (6), the sample (5) is contained in hollow In chamber (10).
3. breakthrough of gas pressure test device according to claim 2, which is characterized in that seal section height HtWith sample (5) Height Hsample, cylinder body (6) internal diameter DtWith sample (5) diameter DsampleThere is following relationship:
4. breakthrough of gas pressure test device according to claim 3, which is characterized in that the depth of each groove (4) Spending is 0.3mm, width 1mm, and the spacing between two adjacent groups groove (4) is 4mm.
5. breakthrough of gas pressure test device according to claim 4, which is characterized in that the pressure head (1) and pedestal (8) It has been separately formed protrusion (3), in protrusion (3) insertion cylinder body (6) hollow cavity (10).
6. a kind of breakthrough of gas method for testing pressure, which is characterized in that using the described in any item test dresses of claim 1-5 It sets, the test device includes cylinder body (6), pressure head (1) and pedestal (8), hollow cavity (10) are formed inside the cylinder body (6), Sample is contained in hollow cavity (10), forms seal section, the pressure head on the inner wall that the cylinder body (6) contacts with sample (5) (1) it is formed on air inlet (9), venthole (7) is formed on pedestal (8);
The test method the following steps are included:
Step 1: the sample made (5) is put at cylinder body (6) hollow cavity (10) interior seal section;
Step 2: increase the humidity of the test space, sample (5) water swelling plug for seal section, until sealing;
Step 3: pressure head (1) and pedestal (8) is separately fixed to inlet end and the outlet side of cylinder body, pressure head by bolt (2) (1) molding air inlet (9) connect with air delivery device on, and molding venthole (7) and gas controlling device connect on pedestal (8) It connects;
Step 4: gradually increasing the gas pressure of air inlet (9) since 0, continues to monitor at pedestal (8) venthole (7) Air-flow when, then the gas pressure difference of air inlet (9) and venthole (7) is the breakthrough of gas pressure of sample (5).
7. breakthrough of gas method for testing pressure according to claim 6, which is characterized in that test space temperature is 20 DEG C.
CN201711182357.6A 2017-11-23 2017-11-23 Breakthrough of gas pressure test device and method Active CN108168768B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201711182357.6A CN108168768B (en) 2017-11-23 2017-11-23 Breakthrough of gas pressure test device and method
AU2018372341A AU2018372341B2 (en) 2017-11-23 2018-09-07 Gas escape pressure testing device and method
RU2019118231A RU2723232C1 (en) 2017-11-23 2018-09-07 Device and method of experimental determination of gas breakthrough pressure
PCT/CN2018/104638 WO2019100812A1 (en) 2017-11-23 2018-09-07 Gas escape pressure testing device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711182357.6A CN108168768B (en) 2017-11-23 2017-11-23 Breakthrough of gas pressure test device and method

Publications (2)

Publication Number Publication Date
CN108168768A CN108168768A (en) 2018-06-15
CN108168768B true CN108168768B (en) 2019-03-01

Family

ID=62527595

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711182357.6A Active CN108168768B (en) 2017-11-23 2017-11-23 Breakthrough of gas pressure test device and method

Country Status (4)

Country Link
CN (1) CN108168768B (en)
AU (1) AU2018372341B2 (en)
RU (1) RU2723232C1 (en)
WO (1) WO2019100812A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108168768B (en) * 2017-11-23 2019-03-01 中国矿业大学 Breakthrough of gas pressure test device and method

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08274350A (en) * 1995-03-29 1996-10-18 Yokogawa Electric Corp Semiconductor pressure sensor and its manufacture
US5889211A (en) * 1995-04-03 1999-03-30 Motorola, Inc. Media compatible microsensor structure and methods of manufacturing and using the same
DE102008043175A1 (en) * 2008-10-24 2010-04-29 Endress + Hauser Gmbh + Co. Kg Relative pressure sensor
CN201358783Y (en) * 2009-02-23 2009-12-09 大庆油田有限责任公司 Pressure flow integrated seal checking device
DE102009028488A1 (en) * 2009-08-12 2011-02-17 Endress + Hauser Gmbh + Co. Kg Relative pressure sensor
CN202693192U (en) * 2012-06-27 2013-01-23 龙泉市杰科汽车零部件有限公司 Differential pressure sensor
CN103776744B (en) * 2012-10-19 2016-06-08 中国石油化工股份有限公司 The detection method of a kind of rock sample three-dimensional permeability and detection system thereof
WO2014158436A1 (en) * 2013-03-24 2014-10-02 Schlumberger Canada Limited System and methodology for determining properties of a substance
CN103556993B (en) * 2013-11-07 2016-12-07 中国石油大学(北京) Low permeability oil field plane Five-point method pattern carbon dioxide flooding emulation experiment analogy method
CN204461880U (en) * 2015-01-04 2015-07-08 中国石油天然气股份有限公司 Core breakthrough pressure proving installation
CN104792685B (en) * 2015-04-23 2017-07-28 太原理工大学 A kind of fractured coal and rock gas infiltration experiment device and method
CN105547848B (en) * 2016-01-13 2018-09-28 重庆科技学院 A kind of mixing rock core test cabinet and mud stone breakthrough pressure test device
CN108168768B (en) * 2017-11-23 2019-03-01 中国矿业大学 Breakthrough of gas pressure test device and method

Also Published As

Publication number Publication date
CN108168768A (en) 2018-06-15
WO2019100812A1 (en) 2019-05-31
RU2723232C1 (en) 2020-06-09
AU2018372341A1 (en) 2019-06-27
AU2018372341A2 (en) 2019-07-25
AU2018372341B2 (en) 2020-10-15

Similar Documents

Publication Publication Date Title
Imbert et al. Hydro-mechanical response of a bentonite pellets/powder mixture upon infiltration
CN109557253A (en) A kind of comprehensive hydrate simulation system and its experimental method
Martin et al. Large-scale and long-term coupled thermo-hydro-mechanic experiments with bentonite: the FEBEX mock-up test
CN107238693A (en) A kind of underground water leakage induces the experimental rig and its application method of surface collapse
CN108168768B (en) Breakthrough of gas pressure test device and method
CN108732329B (en) Coal seam gas pressure measurement simulation experiment device and method
CN108871876B (en) Gas production column for monitoring carbon dioxide flux of soil in gas-filled zone of gas injection oil displacement well site
Qiao et al. Assessing containment properties of underground oil storage caverns: methods and a case study
CN104422648B (en) A kind of oil well pipe material deposition sulfur corrosion test method and its test fixture
Alonso et al. Monitoring large-scale tests for nuclear waste disposal
Zhao et al. Morphological characteristics of overlying soil eroded by leakage gas from buried pipelines
CN108693302A (en) The test method of padded coaming heat-water-power-chemical Coupling test bench for performance
CN109655598A (en) A kind of high-pressure solid bentonite heat-water-force coupling action simulation testing instrument
CN115078635A (en) Volume-swelling leakage plugging liquid testing device and testing method
CN108020469A (en) A kind of triaxial tests device and its experimental method based on fluid pressure fracturing method
CN115219380A (en) Device and method for measuring gas content of shale in closed crushing field
CN208255181U (en) A kind of experimental provision for testing high temperature mud performance
CN108692685B (en) Displacement monitoring method for buffer material multi-field coupling large-scale experiment bench
CN113588306A (en) Experimental device and experimental method for gas storage of residues in bottom pit of old cavity for salt mining
CN114791484B (en) Method for measuring creep rate of underground salt cavern
Ye et al. A device designed for simulating HM behavior of compacted GMZ01 bentonite
CN114778433B (en) Hydrogen storage sealing layer mechanical behavior testing device and method
CN209327168U (en) A kind of comprehensive hydrate simulation system
Wei et al. Study of the indoor model test and CEL simulation of jacking force in the vertical tunnelling method
CN110687017B (en) Device and method for measuring gas migration characteristic and expansion force of buffer material

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20180615

Assignee: Jiangsu Kedi scientific research instrument Co.,Ltd.

Assignor: CHINA University OF MINING AND TECHNOLOGY

Contract record no.: X2024980000759

Denomination of invention: Gas breakthrough pressure testing device and method

Granted publication date: 20190301

License type: Common License

Record date: 20240116