CN106988730A - Gas parametric measurement probe and its application method in a kind of coal seam - Google Patents
Gas parametric measurement probe and its application method in a kind of coal seam Download PDFInfo
- Publication number
- CN106988730A CN106988730A CN201710403170.8A CN201710403170A CN106988730A CN 106988730 A CN106988730 A CN 106988730A CN 201710403170 A CN201710403170 A CN 201710403170A CN 106988730 A CN106988730 A CN 106988730A
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- 239000000523 sample Substances 0.000 title claims abstract description 117
- 239000003245 coal Substances 0.000 title claims abstract description 53
- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 241001149930 Protura <class> Species 0.000 claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 230000000740 bleeding effect Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 238000009530 blood pressure measurement Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Measuring Fluid Pressure (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention relates to gas parametric measurement probe and its application method in a kind of coal seam, including conehead, pressure-measuring pipe, the first probe supervisor and the multiple second probes supervisor being from left to right detachably connected successively.Workload during present invention construction is small, and due to the extruding of coal body and probe, can be achieved after probe hammers into coal body certain distance self-styled, it is ensured that can measure the Real Gas pressure of its present position of probe pressure-measuring pipe, and the required testing time is shorter.The present invention is not only able to shorten the gas pressure measurement cycle, improves the success rate of piezometry, moreover it is possible to follow closely the process into coal body in measure probe, can by follow closely into complexity judge the Failure type of coal, foundation is provided for the measure of gas relevant parameter, of the invention is practical, is worthy to be popularized.
Description
Technical field
The invention belongs to technical field of coal mine, and in particular to gas parametric measurement probe and its user in a kind of coal seam
Method.
Background technology
There is different degrees of defect in the assay method that current coal-bed gas has related parameter, such as current coal-bed gas pressure
Power is determined can only be by drilling and the method for sealing of hole is measured in coal seam, and this method construction workload is big, determines the cycle
It is longer, sealing of hole effect it is difficult to ensure that, easy gas leakage build-up of pressure is not measured；Coal body Determination of Hardness need to then be sampled and band in coal seam
Use for laboratory drop weight method is measured, and it has the disadvantage, and workload is big, error is larger；And coal destructiveness can only be carried out by observing
Judge, error is larger, subjectivity is strong, be unable to quantitative reaction.
The content of the invention
In view of this, the invention provides gas parametric measurement probe and its application method in a kind of coal seam, to solve
Deficiency of the prior art.
The technical scheme is that：Gas parametric measurement probe in a kind of coal seam, including it is from left to right detachable successively
Conehead, pressure-measuring pipe, the first probe supervisor and the multiple second probes supervisor of connection.
Preferably, the mode being detachably connected is threaded connection, and all screw threads are coarse thread, the threaded spiral shell of institute
Away from, the high all same of tooth.
Preferably, conehead includes circular cone termination, cylindrical section and linkage section connected successively, the coning angle of the circular cone termination
<45 °, the cylindrical section external diameter is 10~15mm, and 3~10mm of length, the linkage section offers the internal thread for connection, institute
State internal thread to match with the external screw thread on pressure-measuring pipe, reach >=10mm of the internal thread, the drilling depth of thread Pilot hole
>=11mm, thread Pilot hole is flat.
Preferably, the external diametrical extent of pressure-measuring pipe is 8~13mm, and internal diameter is 3~8mm, length >=10mm of connection screw thread；
The multiple through holes of circumference uniform distribution of the pressure-measuring pipe, the diameter of the through hole is Φ 1mm.
Preferably, the external diameter of the first probe supervisor connected with pressure-measuring pipe is equal with the cylindrical section external diameter of conehead, and second visits
Pin is responsible for and external diameter, the internal diameter of the first probe supervisor are equal.
Preferably, the first probe supervisor's inside diameter ranges are in 3~8mm, and external diametrical extent is 8~15mm, the first probe supervisor's
Left end has<Left end diameter after 45 ° of chamfering, chamfering is equal with pressure measurement pipe diameter.
The application method of gas parametric measurement probe, comprises the following steps in a kind of coal seam：
Step 1, in predetermined pressure tap, bore bottom outlet perpendicular to rib with air drill, and with step reaming bit expansion orientation drill
Bore dia is to 50~90mm of Φ, depth 1.2m；
Step 2, by 55~75mm of Φ, aperture fixing pipe feeding pilot holes of the overall length 1.4m with conehead is simultaneously seated, and is oriented to
Drill the long 0.2m of exposed steel pipe, is hammered into around and carves nail or be filled with dilatancy quick-set, to ensure that aperture fixing pipe is fixed on
Do not loosened in drilling；
Step 3, the 45~65mm of Φ that will install front and rear locator, overall length 1.5m hammering guide pipe insertion aperture are fixed
Pipe, be fixed in using fixing pipe conehead, compressing fixture and clamp nut in the fixing pipe of aperture, after installing, rear locator away from
500~800mm of guide pipe collar extension；
Step 4, the order connection being responsible for successively by probe conehead, pressure-measuring pipe, the first probe supervisor and multiple second probes
Probe；
Step 5, by the probe connected by probe connect guide pipe insert positioning pipe in three locators centre bore
In, probe conehead withstands front coal body, 100~200mm of probe back range guide pipe collar extension in drilling；
Step 6, impact tube inserted fixed in positioning pipe, and ensure that firm nothing is rocked, copper is impacted in push-in impact tube
Sliding block, by probe tail insertion impact its center hole；
Step 7, the tup for the pneumatic pick that will connect air compressor machine pressure ventilation pipe insert impact tube, compress copper impact sliding block, start
Probe is hammered into coal body by pneumatic pick；
Step 8, probe stop pneumatic pick hammering when hammering into coal body 500mm, pull out pneumatic pick tup；
Step 9, impact tube is taken out, insertion probe connection guide pipe accesses one section of probe by guide pipe and is responsible for, and with growing
It is connected, fastened by screwdriver with front supervisor；
Step 10, taking-up probe connection guide pipe, repeat 6~10 steps, until probes probes conehead gos deep into coal body 15m；
Step 11, successively taking-up pneumatic pick tup, impact tube, hammering guide pipe and aperture fixing pipe；
Step 12, in probe tail connects triple valve, two other port of triple valve, upper port connects manometric valve,
The outlet of valve connects pressure pipe, and the end of pressure pipe connects pressure gauge, and the lower port of triple valve is run in air valve, is closed air bleeding valve, is beaten
Open pressure gage valve, start recording gas pressure；
After step 13, gas pressure test terminate, first open air bleeding valve and discharge gas with pressure, then remove pressure gauge, threeway
Valve, pressure pipe, pressure connection；
After step 14, measure are finished, probe is taken out using jack.
Compared with prior art, the beneficial effect of gas parametric measurement probe is in a kind of coal seam that the present invention is provided：
1st, when the work of concordant gas pressure measurement is carried out in coal seam, shifting rig, process of drilling are eliminated, construction is only
Air drill and pneumatic pick that need to be lighter can be completed, and workload is smaller.
2nd, when probe hammers into coal body, by the extruding of coal body and probe, it can be achieved after probe hammers into coal body certain distance
It is self-styled, it is ensured that the Real Gas pressure of its present position of probe pressure-measuring pipe can be measured.
3rd, due to hammering into during probe, gas can only be scattered and disappeared by probe endoporus, and loss amount is smaller, and needed for whole pressure measurement
Gas pressure balance space is smaller, so the required testing time is shorter.
4th, the present invention is not only able to shorten the gas pressure measurement cycle, improves the success rate of piezometry, moreover it is possible to determining
Probe follows closely the process into coal body, can by follow closely into complexity judge the Failure type of coal, be the survey of gas relevant parameter
It is fixed that foundation is provided.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention.
Scheme of erection when Fig. 2 installs for the measure probe of the present invention.
Fig. 3 is the aperture fixing pipe schematic diagram for determining probe of the invention.
Fig. 4 is copper sliding block diagrammatic cross-section of the invention.
Fig. 5 is the pressure measurement assembling schematic diagram of the pressure-measuring probe of the present invention.
Fig. 6 is orienting locator structural representation of the invention.
Fig. 7 connects guide pipe diagrammatic cross-section for the probe of the present invention.
Description of reference numerals：
1st, conehead；2nd, pressure-measuring pipe；3rd, the first probe is responsible for；4th, aperture fixing pipe；5th, orienting locator；6th, hammering is oriented to
Pipe；7th, guide pipe clamp nut；8th, guide pipe compressing fixture；9th, impact tube；10th, pneumatic pick tup；11st, pneumatic pick；12nd, coal body；13、
Impact tube baffle ring；14th, copper sliding block；15th, impact tube clamp nut；16th, impact tube compressing fixture；17th, pressure ventilation pipe；18th, pressure
Table；19th, triple valve；20th, the second probe is responsible for.
Embodiment
The invention provides gas parametric measurement probe and its application method in a kind of coal seam, with reference to Fig. 1~Fig. 7's
Structural representation, the present invention will be described.
As shown in Fig. 1~Fig. 7, gas parametric measurement probe and its application method in a kind of coal seam that the present invention is provided, bag
Include the conehead 1 being from left to right detachably connected successively, pressure-measuring pipe 2, the first probe supervisor 3 and multiple second probes supervisor 20.
Further, the mode being detachably connected is threaded connection, and all screw threads are coarse thread, the threaded spiral shell of institute
Away from, the high all same of tooth.
Further, conehead 1 includes circular cone termination, cylindrical section and linkage section connected successively, the circle of the circular cone termination
Cone angle<45 °, the cylindrical section external diameter is 10~15mm, and 3~10mm of length, the linkage section offers the interior spiral shell for connection
Line, the internal thread is matched with the external screw thread on pressure-measuring pipe, reach >=10mm of the internal thread, the drilling of thread Pilot hole
Depth >=11mm, thread Pilot hole is flat.
Further, the external diametrical extent of pressure-measuring pipe 2 is 8~13mm, and internal diameter is 3~8mm, the length of connection screw thread >=
10mm；The multiple through holes of circumference uniform distribution of the pressure-measuring pipe 2, the diameter of the through hole is Φ 1mm.
Further, the external diameter of the first probe supervisor 3 connected with pressure-measuring pipe 2 is equal with the cylindrical section external diameter of conehead 1, the
External diameter, the internal diameter of two probes supervisor 20 and the first probe supervisor 3 are equal.
Further, the first probe is responsible for 3 inside diameter ranges in 3~8mm, and external diametrical extent is 8~15mm, the first probe supervisor
3 left end has<Left end diameter after 45 ° of chamfering, chamfering is equal with the diameter of pressure-measuring pipe 2.
The application method of gas parametric measurement probe, comprises the following steps in a kind of coal seam：
Step 1, in predetermined pressure tap, bore bottom outlet perpendicular to rib with air drill, and with step reaming bit expansion orientation drill
Bore dia is to 50~90mm of Φ, depth 1.2m；
Step 2, by 55~75mm of Φ, aperture fixing pipe feeding pilot holes of the overall length 1.4m with conehead is simultaneously seated, and is oriented to
Drill the long 0.2m of exposed steel pipe, is hammered into around and carves nail or be filled with dilatancy quick-set, to ensure that aperture fixing pipe is fixed on
Do not loosened in drilling；
Step 3, the 45~65mm of Φ that will install front and rear locator, overall length 1.5m hammering guide pipe insertion aperture are fixed
Pipe, be fixed in using fixing pipe conehead, compressing fixture and clamp nut in the fixing pipe of aperture, after installing, rear locator away from
500~800mm of guide pipe collar extension；
Step 4, the order for being responsible for 3 and multiple second probes supervisor 20 by probe conehead 1, pressure-measuring pipe 2, the first probe successively
Linking probe；
Step 5, by the probe connected by probe connect guide pipe insert positioning pipe in three locators centre bore
In, probe conehead withstands front coal body, 100~200mm of probe back range guide pipe collar extension in drilling；
Step 6, impact tube inserted in positioning pipe, it is fixed, and ensure that firm nothing is rocked, copper is impacted in push-in impact tube
Sliding block, by probe tail insertion impact its center hole；
Step 7, the tup for the pneumatic pick that will connect air compressor machine pressure ventilation pipe insert impact tube, compress copper impact sliding block, start
Probe is hammered into coal body by pneumatic pick；
Step 8, probe stop pneumatic pick hammering when hammering into coal body 500mm, pull out pneumatic pick tup；
Step 9, impact tube is taken out, insertion probe connection guide pipe accesses one section of probe by guide pipe and is responsible for, and with growing
It is connected, fastened by screwdriver with front supervisor；
Step 10, taking-up probe connection guide pipe, repeat 6~10 steps, until probes probes conehead gos deep into coal body 15m；
Step 11, successively taking-up pneumatic pick tup, impact tube, hammering guide pipe and aperture fixing pipe；
Step 12, in probe tail connects triple valve 19, two other port of triple valve 19, upper port connects manometric valve
Door, the outlet of valve connects pressure pipe, and the end of pressure pipe connects pressure gauge 18, and the lower port of triple valve 19 is run in air valve, the row of closing
Air valve, opens pressure gage valve, start recording gas pressure；
After step 13, gas pressure test terminate, first open air bleeding valve and discharge gas with pressure, then remove pressure gauge, threeway
Valve 19, pressure pipe, pressure connection；
After step 14, measure are finished, probe is taken out using jack.
Gas parametric measurement probe and its application method in a kind of coal seam that the present invention is provided, carry out concordant watt in coal seam
When this piezometry works, shifting rig, process of drilling are eliminated, the air drill and pneumatic pick that construction only need to be lighter can be complete
Into workload is smaller；, can after probe hammers into coal body certain distance by the extruding of coal body and probe when probe hammers into coal body
Realize self-styled, it is ensured that the Real Gas pressure of its present position of probe pressure-measuring pipe can be measured；Due to hammering into during probe, gas can only
Scattered and disappeared by probe endoporus, loss amount is smaller, and gas pressure balance space needed for whole pressure measurement is smaller, so required test
Time is shorter.The present invention is not only able to shorten the gas pressure measurement cycle, improves the success rate of piezometry, moreover it is possible to visited determining
Pin follows closely the process into coal body, can by follow closely into complexity judge the Failure type of coal, be the measure of gas relevant parameter
Foundation is provided, of the invention is practical, is worthy to be popularized.
Disclosed above is only the preferably specific embodiment of the present invention, and still, the embodiment of the present invention is not limited to this,
What any those skilled in the art can think change should all fall into protection scope of the present invention.
Claims (7)
1. gas parametric measurement probe in a kind of coal seam, it is characterised in that including the conehead being from left to right detachably connected successively
(1), pressure-measuring pipe (2), the first probe supervisor (3) and multiple second probes supervisor (20).
2. gas parametric measurement probe in a kind of coal seam according to claim 1, it is characterised in that described to be detachably connected
Mode be threaded connection, all screw threads are coarse thread, the threaded pitch of institute, the high all same of tooth.
3. gas parametric measurement probe in a kind of coal seam according to claim 1, it is characterised in that conehead (1) bag
Include circular cone termination, cylindrical section and linkage section connected successively, the coning angle of the circular cone termination<45 °, the cylindrical section external diameter is
10~15mm, 3~10mm of length, the linkage section are offered on the internal thread for connection, the internal thread and pressure-measuring pipe
External screw thread is matched, reach >=10mm of the internal thread, drilling depth >=11mm of thread Pilot hole, and thread Pilot hole is flat
Bottom.
4. gas parametric measurement probe in a kind of coal seam according to claim 1, it is characterised in that the pressure-measuring pipe (2)
External diametrical extent be 8~13mm, internal diameter be 3~8mm, length >=10mm of connection screw thread；The circumference of the pressure-measuring pipe (2) is equal
The multiple through holes of cloth, the diameter of the through hole is Φ 1mm.
5. gas parametric measurement probe in a kind of coal seam according to claim 1, it is characterised in that with pressure-measuring pipe (2) even
The external diameter of the first probe supervisor (3) connect is equal with the cylindrical section external diameter of conehead (1), the second probe supervisor (20) and the first probe
External diameter, the internal diameter for being responsible for (3) are equal.
6. gas parametric measurement probe in a kind of coal seam according to claim 1, it is characterised in that the first probe master
(3) inside diameter ranges are managed in 3~8mm, external diametrical extent is 8~15mm, the left end of the first probe supervisor (3) has<45 ° of chamfering, falls
Left end diameter behind angle is equal with pressure-measuring pipe (2) diameter.
7. the application method of gas parametric measurement probe, comprises the following steps in a kind of coal seam：
S1, in predetermined pressure tap, bore bottom outlet perpendicular to rib with air drill, and with step reaming bit expansion pilot hole diameter extremely
50~90mm of Φ, depth 1.2m；
S2, by 55~75mm of Φ, aperture fixing pipe feeding pilot holes of the overall length 1.4m with conehead is simultaneously seated, and pilot hole is exposed
The long 0.2m of steel pipe, hammers into around and carves nail or be filled with dilatancy quick-set, to ensure that aperture fixing pipe is fixed in drilling not
Loosen；
S3, the 45~65mm of Φ that will install front and rear locator, overall length 1.5m hammering guide pipe insertion aperture fixing pipe, are utilized
Fixing pipe conehead, compressing fixture and clamp nut are fixed in the fixing pipe of aperture, after installing, rear locator away from guide pipe outside
500~800mm of mouth；
S4, time for being responsible for (20) by probe conehead (1), pressure-measuring pipe (2), the first probe supervisor (3) and multiple second probes successively
Sequence linking probe；
In S5, the centre bore by the probe connected by three locators in probe connection guide pipe insertion positioning pipe, probe
Conehead withstands front coal body, 100~200mm of probe back range guide pipe collar extension in drilling；
S6, impact tube inserted fixed in positioning pipe, and ensure that firm nothing is rocked, copper impact sliding block in push-in impact tube will
Probe tail insertion impact its center hole；
S7, the tup for the pneumatic pick that will connect air compressor machine pressure ventilation pipe insert impact tube, compress copper impact sliding block, and starting pneumatic pick will visit
Pin hammers into coal body；
S8, probe stop pneumatic pick hammering when hammering into coal body 500mm, pull out pneumatic pick tup；
S9, taking-up impact tube, insertion probe connection guide pipe, access one section of probe by guide pipe and are responsible for, and use long screwdriver
It is connected with front supervisor, fastened；
S10, taking-up probe connection guide pipe, repeat 6~10 steps, until probes probes conehead gos deep into coal body 15m；
S11, successively taking-up pneumatic pick tup, impact tube, hammering guide pipe and aperture fixing pipe；
S12, in probe tail connects triple valve (19), two other port of triple valve (19), upper port connects manometric valve,
The outlet of valve connects pressure pipe, and the end of pressure pipe connects pressure gauge (18), and the lower port of triple valve (19) is run in air valve, the row of closing
Air valve, opens pressure gage valve, start recording gas pressure；
After S13, gas pressure test terminate, first open air bleeding valve and discharge gas with pressure, then remove pressure gauge, triple valve (19),
Pressure pipe, pressure connection；
After S14, measure are finished, probe is taken out using jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403170.8A CN106988730B (en) | 2017-06-01 | 2017-06-01 | Coal seam gas parameter measuring probe and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403170.8A CN106988730B (en) | 2017-06-01 | 2017-06-01 | Coal seam gas parameter measuring probe and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106988730A true CN106988730A (en) | 2017-07-28 |
| CN106988730B CN106988730B (en) | 2020-08-11 |
Family
ID=59421370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710403170.8A Active CN106988730B (en) | 2017-06-01 | 2017-06-01 | Coal seam gas parameter measuring probe and using method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN106988730B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611083A (en) * | 2018-12-18 | 2019-04-12 | 华北科技学院 | A kind of mash gas pumping drilling gas leakage amount determining device |
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|---|---|---|---|---|
| US4993503A (en) * | 1990-03-27 | 1991-02-19 | Electric Power Research Institute | Horizontal boring apparatus and method |
| CN1243902A (en) * | 1998-08-03 | 2000-02-09 | 叶长生 | Construction method with pneumatic hammer to impact steel bar reinforced concrete nails |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| CN101705831A (en) * | 2009-10-22 | 2010-05-12 | 武汉武大巨成加固实业有限公司 | Construction method for installing support rapidly by using rear chambering self-locking anchor rod |
| CN201513175U (en) * | 2009-10-23 | 2010-06-23 | 中国地质大学（北京） | Drilling tool for gathering geogas of concealed metal ores |
| CN203145001U (en) * | 2013-04-03 | 2013-08-21 | 福建岩土工程勘察研究院 | Probe static probing equipment |
-
2017
- 2017-06-01 CN CN201710403170.8A patent/CN106988730B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993503A (en) * | 1990-03-27 | 1991-02-19 | Electric Power Research Institute | Horizontal boring apparatus and method |
| CN1243902A (en) * | 1998-08-03 | 2000-02-09 | 叶长生 | Construction method with pneumatic hammer to impact steel bar reinforced concrete nails |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| CN101705831A (en) * | 2009-10-22 | 2010-05-12 | 武汉武大巨成加固实业有限公司 | Construction method for installing support rapidly by using rear chambering self-locking anchor rod |
| CN201513175U (en) * | 2009-10-23 | 2010-06-23 | 中国地质大学（北京） | Drilling tool for gathering geogas of concealed metal ores |
| CN203145001U (en) * | 2013-04-03 | 2013-08-21 | 福建岩土工程勘察研究院 | Probe static probing equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611083A (en) * | 2018-12-18 | 2019-04-12 | 华北科技学院 | A kind of mash gas pumping drilling gas leakage amount determining device |
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|---|---|
| CN106988730B (en) | 2020-08-11 |
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