WO2019200821A1 - Appareil de mesure de température durant forage pour détecter une température d'auto-allumage de charbon - Google Patents

Appareil de mesure de température durant forage pour détecter une température d'auto-allumage de charbon Download PDF

Info

Publication number
WO2019200821A1
WO2019200821A1 PCT/CN2018/104642 CN2018104642W WO2019200821A1 WO 2019200821 A1 WO2019200821 A1 WO 2019200821A1 CN 2018104642 W CN2018104642 W CN 2018104642W WO 2019200821 A1 WO2019200821 A1 WO 2019200821A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
signal
conductive
cavity
signal line
Prior art date
Application number
PCT/CN2018/104642
Other languages
English (en)
Chinese (zh)
Inventor
任万兴
郭庆
石晶泰
赵乾坤
王士华
Original Assignee
中国矿业大学
徐州吉安矿业科技有限公司
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 中国矿业大学, 徐州吉安矿业科技有限公司 filed Critical 中国矿业大学
Publication of WO2019200821A1 publication Critical patent/WO2019200821A1/fr

Links

Images

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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure
    • E21B47/07—Temperature
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling

Definitions

  • the invention relates to a measurement while drilling temperature detecting device for detecting spontaneous combustion temperature of coal, belonging to a coal spontaneous combustion temperature detecting device.
  • coal spontaneous combustion is one of the disasters affecting the safe recovery of the working face
  • the goaf is the spontaneous combustion area of coal. Since the goaf is in a closed space, it is impossible to measure the temperature of the internal space in real time.
  • the gas detection method is used to invert the degree of spontaneous combustion of the coal in the goaf, and corresponding fire control measures are taken based on the inversion results.
  • this method due to the influence of underground coal flow, mining and geological occurrence, once the iconic gas is detected, the residual coal has entered the stage of spontaneous combustion, which cannot prevent the effect in advance and directly increase the fire. The probability of occurrence increases the investment in fire management.
  • the temperature of the easy-fire location can be monitored in advance, and direct temperature measurement such as optical fiber temperature measurement technology, thermocouple technology, and infrared detection technology can be considered.
  • the light temperature measurement technology preliminarily lays the optical fiber to the goaf or the easy-fire area, and uses the optical time domain reflection technology to measure the temperature of the goaf in real time. Since the optical fiber is generally laid on the coal seam floor, it is affected by the roof collapse of the coal seam and the mine water. This method often has problems such as fiber being cut off, fiber or temperature probe being immersed, etc. In addition, the method needs to be pre-buried, and for an area that is not buried and has been ignited, its internal temperature cannot be measured.
  • thermocouple is used to measure the temperature in the borehole, although the temperature of the ignition space can sometimes be measured, the operation is complicated, and the surrounding rock condition of the borehole and the thermal conductivity of the porous medium in the goaf are poor, and the accuracy is Poor sensitivity.
  • the infrared detection technology is only applicable to the area temperature measurement where the surface temperature changes obviously, and is not suitable for the detection of the temperature of the mined area under the mine or the abandoned roadway area.
  • a temperature-measuring drilling tool for temperature detection of a goaf in a coal mine which is a temperature measuring valve block disposed between a water head and a drill pipe, which comprises a central rotating cavity and signal transmission feedback.
  • the connecting end of the water changing head is inserted into the pipe joint at one end of the central rotating cavity, and the other end of the central rotating cavity is connected with the drill pipe;
  • the signal transmission feedback component is mounted on the central rotating cavity by the positioning sleeve, and the positioning sleeve and the center
  • a conductive ring is arranged in the cavity between the rotary chambers;
  • the signal transmission feedback component includes a signal line I, a signal line II, a signal input end and a signal output end, and the signal line I and the signal line II connect the temperature sensing cable and the signal input.
  • the terminal is connected to the signal output.
  • the invention is convenient to operate, can not only detect the temperature distribution of the area, but also can measure the temperature along the drilling path when the drill pipe is drilled deep, thereby accurately detecting the temperature of the coal mine goaf and other fire area, thereby facilitating advancement. Do a good job of prevention and reduce the probability of fire.
  • the principle of the above-mentioned drilling while drilling temperature drilling tool is: connecting the temperature measuring valve block between the water head of the drilling machine and the drill pipe, and continuously inputting an electric signal to the temperature measuring valve block from the outside through the signal input end during drilling.
  • the signal is transmitted to the signal output terminal via the signal line I, the temperature sensing cable and the signal line II.
  • the temperature sensing cable is short-circuited, and the short-circuit signal can be output to the alarm connected thereto through the signal output terminal.
  • the component issues a warning.
  • Different monitoring points in the same work area and temperature-sensitive cables that change different detection temperatures at the same monitoring point can monitor the temperature of a wide range of working areas.
  • the shortcoming of the existence is: the temperature of the temperature sensing cable is determined. When the temperature reaches the set temperature of the temperature sensing cable, the temperature sensing cable is automatically melted, and the temperature measurement cannot be continued, that is, the temperature is one-time measurement, and the detection result can only be expressed. The measured temperature is greater than the temperature set of the temperature sensing cable, but the exact temperature value cannot be determined. Therefore, continuous temperature measurement cannot be achieved.
  • the present invention provides a logging temperature measuring device for detecting the spontaneous combustion temperature of coal, which can monitor the real-time temperature in the borehole, and the measured temperature is more accurate, stable, rapid and continuous.
  • the Drilling while temperature measuring device comprises a central rotating cavity and a signal transmission module
  • the signal transmission module is installed in the center through the positioning sleeve
  • a pair of slewing bearings are arranged between the central rotating cavity and the positioning sleeve
  • a conductive ring is arranged in the cavity between the positioning sleeve and the central rotating cavity, and the conductive ring is sleeved on the central rotating cavity.
  • the diameter of the inner ring of the conductive ring is larger than the diameter of the outer ring of the central rotating cavity, and the insulating ring and the central rotating cavity are filled with an insulator;
  • the signal transmission module includes a signal line, a signal output end, a communication cable, a display, a signal line, and a temperature sensor.
  • the temperature sensor is installed in the drill bit, the signal receiving and the wireless transmitting device are connected to the temperature sensor through the signal line and installed outside the drill pipe farthest from the drill bit, and the signal output end is connected through the communication cable outward
  • the display the signal output end corresponding to the position of the conductive ring is inserted radially from the outside and passes through the positioning sleeve, and the signal
  • the center of the outlet end is provided with a conductive rod
  • the front end of the conductive rod is provided with a conductive hemisphere, the front end surface of the conductive hemisphere is in contact with the annular outer surface of the conductive ring
  • the signal line is placed in the connected central rotary cavity and the drill pipe, and one end of the signal line passes through
  • the central rotating cavity side wall is fixed to the inner ring of the conductive ring, and the other end is connected to the temperature sensor output end inside the drill bit.
  • a Drilling Temperature Measurement Device for detecting the spontaneous combustion temperature of coal, during the drilling process, transmits the sensor signal to the conductive ring through the signal line through the temperature sensor inside the drill bit, and the conductive ring Real-time temperature monitoring is realized by conductive hemispheres, conductive rods and communication cables to the display; after the drilling is completed, the signal receiving and wireless transmitting device attached to the last stage drill pipe is connected to the signal line to obtain the sensor signal. And the signal is sent to the receiving device in a wireless manner, and the receiving device displays the temperature change; the above measured temperatures are more accurate, stable, rapid and continuous after the spinning process and the end.
  • the invention is a temperature detecting device proposed for the prevention and control of coal spontaneous combustion in coal mines.
  • FIG. 1 is a schematic diagram of an application of an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the structure of a temperature measurement device while drilling according to an embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of the last stage drill pipe of Figure 2.
  • FIG. 4 is a view showing the mounting structure of the signal wires in the drill pipe of FIG. 2.
  • Figure 5 is a schematic view showing the structure of the fixing sleeve of Figure 4.
  • a measurement while drilling temperature measuring device for detecting the spontaneous combustion temperature of coal the measurement while drilling temperature measuring device 7 is installed between the water supply device and the drill pipe 4 , the water supply device including the water supply device 2 and the high pressure water pipe 3.
  • the high pressure water pipe 3 is connected to the water source at one end and the water supply device 2 at the other end.
  • the drill 1 and the drill pipe 4 are coaxially mounted on the side of the water supply device 2 and the temperature measuring device 7 while drilling, and the drill pipe 4 is connected with a drill bit at the front end thereof. 5.
  • the temperature-measuring device 7 for drilling includes a central rotary cavity 10 and a signal transmission module, and the signal transmission module is mounted on the central rotary cavity 10 through the positioning sleeve 30, and the central rotary cavity
  • a pair of slewing bearings 20 are disposed between the body 10 and the positioning sleeve 30, and a conductive ring 60 is disposed in the cavity between the positioning sleeve 30 and the central rotating cavity 10, and the conductive ring 60 is sleeved on the central rotating cavity 10.
  • the diameter of the inner ring of the conductive ring 60 is larger than the diameter of the outer ring of the central rotating cavity 10, and the insulator 50 is filled between the conductive ring 60 and the central rotating cavity 10.
  • the material of the insulator 50 may be insulated nylon; the signal transmission module
  • the signal line 80, the signal output terminal 70, the communication cable 90, the display 100, the signal line 80, the temperature sensor 110, and the signal receiving and wireless transmitting device 120 are included.
  • the temperature sensor 110 is installed in the drill bit 5, and the temperature sensor 110 is preferably installed throughout.
  • the signal receiving and wireless transmitting device 120 is connected to the temperature sensor 110 via the signal line 80 and installed outside the last stage drill pipe 4-1 farthest from the drill bit 5 (see Fig. 3), signal output end 70 is connected to the display 100 through the communication cable 90.
  • the signal output end 70 is inserted into the positioning sleeve 30 from the outside in the radial direction corresponding to the position of the conductive ring 60, and the signal output end 70 is provided with a conductive rod 71 at the center, and the front end of the conductive rod 71 A conductive hemisphere 73 is disposed, the front end surface of the conductive hemisphere 73 is in contact with the annular outer surface of the conductive ring 60, the signal line 80 is placed in the communicating central rotary cavity 10 and the drill rod 4, and one end of the signal line 80 passes through the central rotary cavity
  • the side wall of the 10 is fixed to the inner circumference of the conductive ring 60, and the other end is connected to the output end of the temperature sensor 110 inside the drill 5.
  • the signal line 80 is supported by the fixing sleeve 6 in the cavity of the drill pipe 4.
  • the outer part of the fixing sleeve 6 is an outer circle 6-3 suitable for the inner diameter of the drill pipe 4, and the fixing sleeve 6 is fixed.
  • the inner center has a ring member 6-1 through which the signal wire 80 passes, and the ring member 6-1 and the outer ring 6-3 are connected by a strut 6-2. It can improve the installation position of the signal line 80, the stability of the working performance, and the long service life.
  • the conductive rod 71 is sleeved with a spring 72, and one end of the spring 72 bears against the conductive hemisphere 73, and the other end is set at the signal output.
  • the signal line 80 the signal line 80 and the insulator 50, the central rotary cavity 10 and the insulator 50 are filled with a resin 40; and at the same time, the signal line 80 is located in the cavity of the drill pipe 4.
  • the outer protective cover 82 can be formed by connecting a plurality of signal lines 80 through the signal line connecting socket 81 according to the length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Remote Sensing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

La présente invention concerne un appareil de mesure de température durant forage pour détecter une température d'auto-allumage de charbon, ledit appareil comprenant une cavité rotative centrale (10) et un module de transmission de signal. Le module de transmission de signal est monté sur la cavité rotative centrale (10) au moyen d'un manchon de positionnement (30). Le module de transmission de signal comprend un fil de signal (80), une extrémité de sortie de signal (70), un câble de communication (90), un dispositif d'affichage (100), un capteur de température (110), et un dispositif de réception de signal et de transmission sans fil (120). Le centre de l'extrémité de sortie de signal (70) est pourvu d'une tige conductrice (71). Un hémisphère conducteur (73) est prévu à l'extrémité avant de la tige conductrice (71). L'hémisphère conducteur (73) est en contact avec une bague conductrice (60). Le fil de signal (80) est placé dans la cavité rotative centrale (10) et une tige de forage (4) qui sont en communication l'une avec l'autre. Une extrémité du fil de signal (80) est connectée à une bague intérieure de la bague conductrice (60), et l'autre extrémité est connectée au capteur de température (110).
PCT/CN2018/104642 2018-04-18 2018-09-07 Appareil de mesure de température durant forage pour détecter une température d'auto-allumage de charbon WO2019200821A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810347533.5 2018-04-18
CN201810347533.5A CN108798649B (zh) 2018-04-18 2018-04-18 一种用于煤炭自燃温度探测的随钻测温装置

Publications (1)

Publication Number Publication Date
WO2019200821A1 true WO2019200821A1 (fr) 2019-10-24

Family

ID=64094371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/104642 WO2019200821A1 (fr) 2018-04-18 2018-09-07 Appareil de mesure de température durant forage pour détecter une température d'auto-allumage de charbon

Country Status (2)

Country Link
CN (1) CN108798649B (fr)
WO (1) WO2019200821A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113338901A (zh) * 2021-06-07 2021-09-03 中海油田服务股份有限公司 一种用于引线的仪器短节和井下仪器的测试***
CN113738359A (zh) * 2021-08-25 2021-12-03 金川集团股份有限公司 一种六角形进路胶结充填采矿法及采矿设备
CN113756710A (zh) * 2021-09-10 2021-12-07 湘潭大学 矸石山自燃钻探灭一体化装置
CN113805248A (zh) * 2021-08-06 2021-12-17 中煤科工集团沈阳研究院有限公司 一种煤矿自燃火区综合探测方法
CN114689211A (zh) * 2022-04-13 2022-07-01 潮峰钢构集团有限公司 大体积混凝土施工的智慧测温检测***及检测方法
CN114776241A (zh) * 2022-05-17 2022-07-22 中煤科工集团西安研究院有限公司 带有旋通装置的随钻测量送水器、无线及有线旋通装置
CN114991761A (zh) * 2022-05-17 2022-09-02 中煤科工集团西安研究院有限公司 煤矿井下电能、信号和冲洗液多功能旋转输送器及方法
CN115288664A (zh) * 2022-08-23 2022-11-04 山东万洋石油科技有限公司 一种模块化组装式近钻头测量仪器
CN117468869A (zh) * 2023-11-24 2024-01-30 深圳市钻通工程机械股份有限公司 一种双层套管钻杆

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109681195A (zh) * 2019-02-25 2019-04-26 中国矿业大学(北京) 一种井下钻孔内沿程温度红外测试装置及方法
CN110792432A (zh) * 2019-08-27 2020-02-14 河南理工大学 含瓦斯煤层钻进钻头温度检测***及其检测方法
CN110888149B (zh) * 2019-11-04 2021-07-23 西安科技大学 煤层火灾定位***及定位方法
CN111187634B (zh) * 2019-11-24 2021-07-16 石晶 一种智能成型码垛炼焦生产方法
CN111521537B (zh) * 2020-04-30 2022-10-21 太原理工大学 一种块煤钻进过程的多维数据测量装置
CN111398130B (zh) * 2020-04-30 2022-11-08 太原理工大学 多维度数据来源的块煤渗透率分析方法、测量装置及方法
CN111934152B (zh) * 2020-07-17 2021-09-24 中国兵器装备集团上海电控研究所 中空式滚动旋转传输装置
CN112993689B (zh) * 2021-02-07 2022-10-28 中国海洋石油集团有限公司 一种井下测量工具及其电连接器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202039772U (zh) * 2011-05-16 2011-11-16 辽宁工程技术大学 钻孔煤屑温度预测冲击地压装置
CN204964066U (zh) * 2015-07-09 2016-01-13 徐州安云矿业科技有限公司 一种煤矿自燃火区钻孔测温装置
CN205404002U (zh) * 2016-03-25 2016-07-27 中国神华能源股份有限公司 煤堆测温装置
US9631478B2 (en) * 2013-11-25 2017-04-25 Baker Hughes Incorporated Real-time data acquisition and interpretation for coiled tubing fluid injection operations
CN107503741A (zh) * 2017-09-11 2017-12-22 中国矿业大学 一种用于煤矿井下采空区温度探测的随钻测温钻具

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58140633A (ja) * 1981-07-24 1983-08-20 Central Res Inst Of Electric Power Ind 貯炭パイルの自然発火監視方法
US20040252748A1 (en) * 2003-06-13 2004-12-16 Gleitman Daniel D. Fiber optic sensing systems and methods
US8120508B2 (en) * 2006-12-29 2012-02-21 Intelliserv, Llc Cable link for a wellbore telemetry system
RU2442891C1 (ru) * 2010-08-23 2012-02-20 Шлюмберже Текнолоджи Б.В. Комплексный прибор для исследования скважин
CN103590753A (zh) * 2013-11-25 2014-02-19 四川大学 用于实时探测钻孔内温度的钻具
CN204027712U (zh) * 2014-06-20 2014-12-17 西安科技大学 煤仓自燃危险区域无线监测装置
CN104481515A (zh) * 2014-11-28 2015-04-01 煤科集团沈阳研究院有限公司 一种采空区隐蔽火源探测***及探测方法
CN106988724B (zh) * 2017-04-12 2020-06-02 中国石油大学(华东) 随钻光谱仪
CN107227954B (zh) * 2017-07-08 2021-03-30 西安科技大学 一种采空区煤自燃三带快速观测及分析方法
CN107476822B (zh) * 2017-10-12 2019-04-16 中国矿业大学 煤层突出危险性随钻测试方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202039772U (zh) * 2011-05-16 2011-11-16 辽宁工程技术大学 钻孔煤屑温度预测冲击地压装置
US9631478B2 (en) * 2013-11-25 2017-04-25 Baker Hughes Incorporated Real-time data acquisition and interpretation for coiled tubing fluid injection operations
CN204964066U (zh) * 2015-07-09 2016-01-13 徐州安云矿业科技有限公司 一种煤矿自燃火区钻孔测温装置
CN205404002U (zh) * 2016-03-25 2016-07-27 中国神华能源股份有限公司 煤堆测温装置
CN107503741A (zh) * 2017-09-11 2017-12-22 中国矿业大学 一种用于煤矿井下采空区温度探测的随钻测温钻具

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113338901A (zh) * 2021-06-07 2021-09-03 中海油田服务股份有限公司 一种用于引线的仪器短节和井下仪器的测试***
CN113805248B (zh) * 2021-08-06 2024-03-15 中煤科工集团沈阳研究院有限公司 一种煤矿自燃火区综合探测方法
CN113805248A (zh) * 2021-08-06 2021-12-17 中煤科工集团沈阳研究院有限公司 一种煤矿自燃火区综合探测方法
CN113738359A (zh) * 2021-08-25 2021-12-03 金川集团股份有限公司 一种六角形进路胶结充填采矿法及采矿设备
CN113756710B (zh) * 2021-09-10 2023-04-25 湘潭大学 矸石山自燃钻探灭一体化装置
CN113756710A (zh) * 2021-09-10 2021-12-07 湘潭大学 矸石山自燃钻探灭一体化装置
CN114689211A (zh) * 2022-04-13 2022-07-01 潮峰钢构集团有限公司 大体积混凝土施工的智慧测温检测***及检测方法
CN114776241A (zh) * 2022-05-17 2022-07-22 中煤科工集团西安研究院有限公司 带有旋通装置的随钻测量送水器、无线及有线旋通装置
CN114991761A (zh) * 2022-05-17 2022-09-02 中煤科工集团西安研究院有限公司 煤矿井下电能、信号和冲洗液多功能旋转输送器及方法
CN114776241B (zh) * 2022-05-17 2023-08-25 中煤科工集团西安研究院有限公司 带有旋通装置的随钻测量送水器、无线及有线旋通装置
CN114991761B (zh) * 2022-05-17 2024-06-04 中煤科工集团西安研究院有限公司 煤矿井下电能、信号和冲洗液多功能旋转输送器及方法
CN115288664A (zh) * 2022-08-23 2022-11-04 山东万洋石油科技有限公司 一种模块化组装式近钻头测量仪器
CN115288664B (zh) * 2022-08-23 2023-03-07 山东万洋石油科技有限公司 一种模块化组装式近钻头测量仪器
CN117468869A (zh) * 2023-11-24 2024-01-30 深圳市钻通工程机械股份有限公司 一种双层套管钻杆

Also Published As

Publication number Publication date
CN108798649A (zh) 2018-11-13
CN108798649B (zh) 2022-02-11

Similar Documents

Publication Publication Date Title
WO2019200821A1 (fr) Appareil de mesure de température durant forage pour détecter une température d'auto-allumage de charbon
JP5723061B2 (ja) ボーリング孔・地表間電磁送信機
US5163321A (en) Borehole pressure and temperature measurement system
US4976142A (en) Borehole pressure and temperature measurement system
CN206488060U (zh) 一种地下综合管廊天然气管道泄露在线监测预警装置
CN107503741B (zh) 一种用于煤矿井下采空区温度探测的随钻测温钻具
CN204827417U (zh) 光纤传感器井下监测用安装固定装置
CN105264172A (zh) 具有光纤的井下钻探最优化钻环
CN107882548A (zh) 一种火驱点火井油井的超高温分布式光纤温度监测***
RU2663981C1 (ru) Система и способ оценки в режиме реального времени эффективности матричной кислотной обработки с использованием гибких труб
AU747413B2 (en) Inflow detection apparatus and system for its use
WO1998012417A1 (fr) Dispositif et procede de surveillance
KR101762614B1 (ko) 상수관로의 누수 여부 및 위치 변화를 감지할 수 있는 상수관로용 안전감시 장치 및 이를 이용한 상수관로 안전감시 방법
CN207194883U (zh) 钻杆参数仪
US3880234A (en) Apparatus for detecting high temperature in wells
CN209459732U (zh) 水位监测***
CN207212328U (zh) 用于煤矿井下采空区温度探测的随钻测温钻具
CN104564032B (zh) 便携式井下钻孔沿程温度测定仪
CN204098896U (zh) 用于保护测井井下仪器的实时监控装置
CN207485417U (zh) 井下测量装置
CN113931619B (zh) 一种海上油田高温水平注汽井光纤温压实时监测***及其监测方法
CN210317398U (zh) 一种用于监测瓦斯隧道瓦斯异常涌出的装置
CN107192779A (zh) 一种煤矿停采面温度监测及气体采集分析***
CN204327074U (zh) 页岩气地面放喷安全监测装置
CN108612522B (zh) 一种套管技术状况检测装置及方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18915265

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18915265

Country of ref document: EP

Kind code of ref document: A1