CN108181442A - A kind of coal seam gas production well packing CH_4 detection real-time sampling device and its application - Google Patents
A kind of coal seam gas production well packing CH_4 detection real-time sampling device and its application Download PDFInfo
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- CN108181442A CN108181442A CN201711382177.2A CN201711382177A CN108181442A CN 108181442 A CN108181442 A CN 108181442A CN 201711382177 A CN201711382177 A CN 201711382177A CN 108181442 A CN108181442 A CN 108181442A
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- 238000005070 sampling Methods 0.000 title claims abstract description 76
- 239000003245 coal Substances 0.000 title claims abstract description 73
- 238000001514 detection method Methods 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 63
- 238000012856 packing Methods 0.000 title claims abstract description 56
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 183
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 83
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001023788 Cyttus traversi Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000013632 homeostatic process Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- -1 methane hydrocarbon Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- General Health & Medical Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The present invention provides a kind of coal seam gas production well packing CH_4 detection real-time sampling device and its application, the sampling apparatus is to combine the cylinder methane trap formed by two half columns or so are closed, two half column side hinge connections at closed combination, opposite side forms cylinder methane trap by openable lock connection with closed combination, two half columns are respectively independent to have upper bottom surface and bottom surface, it is all provided on the upper bottom surface of two half columns or the inner edge of bottom surface fluted, after the closed combination of two half columns, groove on the inner edge of the upper bottom surface of two half columns is combined into a circular hole, the hole for pumping unit the bar hermetically passing that draws water, groove on the inner edge of the bottom surface of two and half main bodys combines to form another circular hole, the hole passes through for producing well bobbin seal.The coal seam gas production well packing CH_4 detection real-time sampling device can realize the convenient, quick, real-time of methane Site Detection at the gas production well packing of coal seam.
Description
Technical field
The present invention relates to suitable for coal seam gas production well packing CH_4 detection real-time sampling device, belong to cbm development mistake
The leakage of journey methane gas, loss detection technique field.
Background technology
With the increasing of China's unconventional petroleum resources exploitation dynamics, the development and utilization of coal bed gas resource is China's energy
Safety guarantee is made that outstanding contributions.At the same time, greenhouse gases leakage, the loss during cbm development based on methane
Situation also results in the extensive concern of numerous scholars, and clean energy resource attribute also receives query.
Coal bed gas refers to be stored in coal seam with methane hydrocarbon gas as main component, is commonly called as " gas " gas, is coal
Associated minerals resource.Coal bed gas is buried in hundreds of meters of underground to the coal seam of two kms, the normal a large amount of coal seam waters of association.Methane passes through
During air collecting pipe reaches ground, coal seam water often blocks pipeline air-inlet hole, causes methane gas that can not reach ground, therefore need profit
With equipment by the casing outside air collecting pipe, subterranean coal water is promoted to earth's surface and is discharged, to ensure that flowline is unobstructed.It takes out
The common equipment of coal seam water is put forward as walking beam type water pump (being commonly called as kowtowing machine).Walking beam type water pump drives crank by motor, connects
Bar, walking beam, horse head move successively, final that the bar that draws water is driven to do piston motion up and down in producing well air collecting pipe, thus by coal seam
Water is promoted to earth's surface.The end of air collecting pipe earth's surface part is equipped with sealing ring, referred to as packing.Hole among packing, draw water bar
Piston motion is done across hole.With the aging that uses of packing, the bar that draws water of part coal seam gas production well has one in lifting
Metering methane loss goes out.In cbm development process producing well methane loss source, packing is the methane weight for being only second to the mining mouth of a river
Big loss point.
At present, it is related special to coal seam gas production well packing CH_4 detection real-time sampling device temporarily without specific criteria, regulation
Profit, document are also without method introduction.Scene is for CH_4 detection process at coal bed gas packing, mainly using materials such as simple plastic films
Expect the mode simply wrapped up, carry out the detection of methane gas.During due to, coal seam gas production well working condition, the bar that draws water begins
Eventually in pumping process, during using carrying out CH_4 detection as described above, due to plastic film and other material easily by
The influence of the environment such as air-flow, pressure is difficult to form effective methane trapping space, and methane gas leakage easily occurs, in addition operating cost
When, it is laborious, this method is difficult to ensure that convenient, the quick and real-time of coal seam gas production well packing CH_4 detection result.
Therefore, there is an urgent need for develop to be suitable for coal seam gas production well packing CH_4 detection real-time sampling device and method for this field.
Invention content
It is needed in view of reality, one of the objects of the present invention is to provide one kind to be suitable for coal seam gas production well packing methane
Real-time sampling device is detected, which can provide convenient, quick sample mode, while can for live CH_4 detection result
Ensure the real-time of testing result.
Another object of the present invention is to provide a kind of coal seam gas production well packing CH_4 detection method, adopted using above-mentioned
Sampling device.
Thus, on the one hand, the present invention provides one kind and is suitable for coal seam gas production well packing CH_4 detection real-time sampling device,
The sampling apparatus is to combine the cylinder methane trap formed, two attached columns at closed combination by two half columns or so are closed
Body side hinge connection, opposite side form cylinder trap, two half columns by openable lock connection with closed combination
It is respectively independent that there is upper bottom surface and bottom surface, it is equipped on the upper bottom surface of two half columns or the inner edge of bottom surface recessed
Slot, after the closed combination of two half columns, the groove on the inner edge of the upper bottom surface of two half columns is combined into a circular hole,
The hole is for the bar hermetically passing that draws water of beam pumping unit, the groove combination on the inner edge of the bottom surface of two and half main bodys
Another circular hole is formed, which passes through for producing well bobbin seal；And adjustable air inlet is equipped on the outside of a half column
Hole, another half column outside are equipped with gas sampling hole.
When carrying out methane Site Detection using apparatus of the present invention, by cylinder methane trap, (such as cylinder methane is caught
Storage) it is fixed at the gas production well packing of coal seam, cylinder methane trap (such as the cylinder methane trap) lower surface
Circular open is fixed on the gas production well casing of coal seam, cylinder methane trap (such as the cylinder methane trap) upper table
Face circular open is fixed on coal seam gas production well beam pumping unit and draws water on bar, the cylinder methane trap receptacle (such as it is round
Cylinder methane trap) by latch (such as elastic lock) be sealed fixation.Cylinder methane is trapped through the above way
Container (such as cylinder methane trap) is fixed at the gas production well packing of coal seam, is revealed, is escaped at the gas production well packing of coal seam
The methane gas come that sheds enters the cylinder methane trap receptacle (such as cylinder methane trap).It is caught into cylinder methane
Collect the methane gas of container (such as cylinder methane trap), can the gas be passed through by methane detector swabbing action
Thieff hatch is detected, and gas-drying apparatus can be added on gas passage, and methane gas is introduced into gas-drying apparatus, by drying
Methane gas afterwards enters back into methane detector.By adjusting the air admission hole charge flow rate size, treat to flow in methane detector
Measure stable reading, you can carry out methane Site Detection.
Coal seam gas production well packing CH_4 detection sampling apparatus provided by the invention is simple in structure, and field application is convenient, energy
Be rapidly achieved methane Site Detection sampling request, realize live methane leakage, loss in real time, continuous metering, and by it is extraneous because
Plain interference magnitude is small, measurement error is small, to be suitable for coal seam gas production well packing CH_4 detection real-time sampling device.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the sampling apparatus be by two half columns or so it is closed combine formed cylindrical column, rectangular shaped post, tetragonal prism,
Trapezoid cylinder or taper type cylinder.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, which is the cylindrical methane trap formed by the symmetrical closed combination of two semicylinders, closed
Two semicylinder side hinge connections at combination, opposite side are connected by openable lock, and cylinder is formed with closed combination
Shape methane trap, two semicylinders are respectively independent to have upper planar base surface and lower planar base surface, in the upper of two semicylinders
Semi-circular recesses are equipped on the inner edge of planar base surface or lower planar base surface, after the closed combination of two semicylinders, two attached columns
Semi-circular recesses on the inner edge of the upper planar base surface of body are combined into a circular hole, the hole for beam pumping unit pumping
Water bar hermetically passing, the semi-circular recesses on the inner edge of the lower planar base surface of two semicircle main bodys combine to form another round hole
Hole, the hole pass through for producing well bobbin seal.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the center of circle that the circular hole formed is combined by the groove on the inner edge at the upper bottom of two half columns are located at what is be collectively formed
The center at upper bottom is combined the center of circle of another circular hole formed by the groove on the inner edge of the bottom of two and half main bodys and is located at
The center for the bottom being collectively formed.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the hinge connection are connected for spring hinge.
As a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention,
The lock is connected as elastic lock connection.Setting hinge connection and lock connect to ensure that the methane trap receptacle is formed surely
Fixed constant gas space ensures live CH_4 detection by extraneous factor interference magnitude is small, measurement error is small.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the basic phase of bar overall diameter of drawing water of the diameter and coal seam gas production well beam pumping unit of the circular hole that upper surface is formed
Together, so that its bar that draws water can pass through the circular hole in the case of sealing and can move up and down.It is highly preferred that in the pumping
Water bar sets rubber washer to increase leakproofness with the circular hole contact position that the upper surface is formed.The setting can ensure to draw water
It is impregnable when bar pumps to be provided simultaneously with a degree of air-tightness.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the circular hole that lower surface is formed and the overall diameter for producing casing are essentially identical, can make the production casing in energy
The circular hole is passed through in the case of sealing.The setting can ensure that the cylinder methane trap lower surface is securable to coal bed gas
It produces on casing.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the adjustable air admission hole can realize that charge flow rate adjusting range is 0~14L/min.
It is excellent as a specific embodiment of the aforementioned coal seam gas production well packing CH_4 detection real-time sampling device of the present invention
Selection of land, the pumping unit are beam pumping unit.
On the other hand, present invention offer is a kind of is suitable for coal seam gas production well packing CH_4 detection real-time sampling system,
Including above-mentioned sampling apparatus and gas-drying apparatus and methane detector, the gas sampling hole and the gas-drying apparatus
Import is connected, and the outlet of the gas-drying apparatus is connected with the air inlet of the methane detector.Set gas-drying apparatus that can incite somebody to action
Methane gas after acquisition is dried, to avoid interference of the aqueous vapor in methane gas to methane detector.
Material and its size of the present invention for making coal seam gas production well packing CH_4 detection real-time sampling device etc. is not
Make limitation in any form, those skilled in the art can be selected according to actual conditions.
On the other hand, the present invention provides a kind of CH_4 detection method at coal seam gas production well packing, is adopted using above-mentioned
Sample system, and include the following steps：
(1) sampling apparatus is installed：The lock is first turned on, is sleeved on the groove of a half column bottom surface inner edge
Outside the gas production well casing of coal seam, while it is that the groove of the inner edge of the half column upper bottom surface is sleeved on the bar that draws water of beam pumping unit
Outside, then another half column is buckled in the half column by latching, is trapped with the cylinder methane that the closed combination in left and right is formed
Device；
(2) make the bar work of drawing water of beam pumping unit, adjust the gas sampling gas inlet hole flow, treat methane detector
When middle gas flow data is stablized, introduced after gas-drying apparatus is dried from the gas sampling mouth by the methane gas being collected into
Methane detector detects methane real-time concentration.
In detection method, by the methane gas of the leakage of coal seam gas production well packing, loss, into cylinder methane
Trap receptacle due to methane detector swabbing action, enters gas-drying apparatus, process is dried by the gas sampling hole
Methane gas enters methane detector.
In summary, the present invention provides one kind be suitable for coal seam gas production well packing CH_4 detection real-time sampling device and
Detection method, compared with prior art, CH_4 detection real-time sampling device is simple, is easily installed, and realizes coal bed gas production
Well scene CH_4 detection is convenient, quick sampling；Sampling quality is effectively ensured, the homeostasis of methane trap receptacle volume can compare
The speed and concentration that the true loss at packing for reflecting methane comes out, in addition can increase the shadow that drier excludes aqueous vapor
It rings.Relative to the simply wrapped mode for using simple plastic film and other material at present, the present invention has fully ensured that CH_4 detection is adopted
Sample process it is convenient, quick, realize the real-time of CH_4 detection.
Description of the drawings
Fig. 1 is the CH_4 detection real-time sampling device that the embodiment of the present invention 1 provides and standing by its sampling system formed
Body figure.
Fig. 2 is the CH_4 detection real-time sampling device field application schematic diagram that the embodiment of the present invention 1 provides.
Specific embodiment
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, in conjunction with specific implementation
Example and technical scheme of the present invention is carried out described further below, it should be understood that these examples be merely to illustrate the present invention rather than
It limits the scope of the invention.In embodiment, each Starting reagents material is commercially available, test method without specific conditions
For conventional method known to fields and normal condition or according to the condition proposed by apparatus manufacturer.
Embodiment 1
It please refers to Fig.1, Fig. 2, is respectively CH_4 detection real-time sampling device provided in this embodiment and is formed by it
Stereogram, the CH_4 detection real-time sampling device field application schematic diagram of sampling system.The sampling apparatus is by two half columns
4th, the cylinder methane trap 1 that 5 or so closed combinations are formed, two half columns 4,5 side hinge connections 6 at closed combination,
Opposite side forms cylinder methane trap 1 by openable 7 connection of lock with closed combination, and two half columns 4,5 are respectively only
It is vertical that there is upper bottom surface and bottom surface, be all provided with fluted 3 on the upper bottom surface of two half columns 4,5 or the inner edge of bottom surface,
2, after two half columns 4,5 closed combinations, the groove 3 on the inner edge of the upper bottom surface of two half columns 4,5 is combined into a circle
Shape hole, the hole is for 13 hermetically passing of bar that draws water of beam pumping unit, the inner edge of the bottom surface of two and half main bodys 4,5
On groove 2 combination form another circular hole, the hole for produce 12 hermetically passing of casing；And on the outside of a half column
Equipped with adjustable air admission hole 8, gas sampling hole 9 is equipped on the outside of another half column；
The sampling apparatus of the present embodiment is to combine the cylindrical column formed by two semicylinders or so are closed；
Further, which caught by the symmetrical closed cylindrical methane formed that combines of two semicylinders
Storage, two semicylinder side hinge connections at closed combination, opposite side is connected by openable lock, with closed group
It closes and forms cylindrical methane trap, two semicylinders are respectively independent with upper planar base surface and lower planar base surface, two and half
Semi-circular recesses are equipped on the upper planar base surface of cylinder or the inner edge of lower planar base surface, when two closed combinations of semicylinder
Afterwards, the semi-circular recesses on the inner edge of the upper planar base surface of two half columns are combined into a circular hole, and the hole is for walking beam
The bar hermetically passing that draws water of formula pumping unit, the semi-circular recesses on the inner edge of the lower planar base surface of two semicircle main bodys combine to be formed
Another circular hole, the hole pass through for producing well bobbin seal；
Further, the center of circle position of the circular hole formed is combined by the groove on the inner edge at the upper bottom of two half columns
In the center at upper bottom being collectively formed, another round hole formed is combined by the groove on the inner edge of the bottom of two and half main bodys
The center of circle in hole is located at the center of bottom being collectively formed；
Further, the hinge connection is connected for spring hinge；
Further, the lock is connected as elastic lock connection；
Further, the bar that draws water of the diameter for the circular hole that upper surface is formed and coal seam gas production well beam pumping unit
Overall diameter is essentially identical, so that its bar that draws water can pass through the circular hole in the case of sealing and can move up and down.
Further, rubber washer is set to increase in the circular hole contact position that the bar that draws water is formed with the upper surface
Add leakproofness.
Further, the circular hole that lower surface is formed and the overall diameter for producing casing are essentially identical, can make the life
Production casing passes through the circular hole in the case where that can seal.
Further, the adjustable air admission hole can realize that charge flow rate adjusting range is 0~14L/min.
Further, the pumping unit is beam pumping unit.
The present embodiment provides one kind to be suitable for coal seam gas production well packing CH_4 detection real-time sampling system, including this reality
Apply sampling apparatus described in example and gas-drying apparatus 10 and methane detector 11, the gas sampling hole 9 and the gas dry
The import of device 10 is connected, and the outlet of the gas-drying apparatus 10 is connected with the air inlet of the methane detector 11.
The present embodiment provides scene CH_4 detection methods at the gas production well packing of coal seam, use above-mentioned sampling system,
And include the following steps：
(1) sampling apparatus is installed：The lock 7 is first turned on, makes the groove set of 4 bottom surface inner edge of a half column
Outside coal seam gas production well casing 12, while it is that the groove of the inner edge of the half column upper bottom surface is sleeved on the pumping of beam pumping unit
Outside water bar 13, then another half column 5 is buckled in the half column 4 by lock 7, the cylinder formed with the closed combination in left and right
Methane trap 1；
(2) bar 13 that draws water of beam pumping unit is made to work, the gas sampling gas inlet hole flow is adjusted, treats CH_4 detection
It is from the gas sampling mouth 9 that the methane gas being collected into is dry through gas-drying apparatus 10 when gas flow data is stablized in instrument 11
Methane detector 11 is introduced after dry and detects methane real-time concentration.
The methane trap receptacle 1 is fixed at the gas production well packing of coal seam, and 1 upper surface of methane trap receptacle is apart from packing
14 about 3~5cm height of mouth.
By the methane gas of the leakage of coal seam gas production well packing, loss, into the cylindricality methane trap receptacle 1, by
In the swabbing action of methane detector 11, gas-drying apparatus 10 is entered by the gas sampling hole 9, by dried methane
Gas enters methane detector 11, realizes scene CH_4 detection at the coal seam gas production well packing.
In detection process, 8 charge flow rate of adjustable air admission hole is adjusted in due course, to meet the air inlet of methane detector
Traffic requirement ensures methane detector normal running conditions.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (13)
1. one kind is suitable for coal seam gas production well packing CH_4 detection real-time sampling device, which is by two half columns
(4), the cylinder methane trap (1) that the closed combination in (5) left and right is formed, two half columns (4), (5) side at closed combination
Hinge connection (6), opposite side form cylinder methane trap (1) by openable lock (7) connection with closed combine, two
Half column (4), (5) are respectively independent to have upper bottom surface and bottom surface, upper bottom surface or bottom surface in two half columns (4), (5)
Inner edge on be all provided with fluted (3), (2), when two half columns (4), (5) closed combination after, two half columns (4), (5)
Groove (3) on the inner edge of upper bottom surface is combined into a circular hole, which wears for the bar that draws water (13) sealing of pumping unit
Cross, two and half main bodys (4), (5) bottom surface inner edge on groove (2) combination form another circular hole, which can
For producing casing (12) hermetically passing；And adjustable air admission hole (8) is equipped on the outside of a half column, it is set on the outside of another half column
There is gas sampling hole (9).
2. according to claim 1 be suitable for coal seam gas production well packing CH_4 detection real-time sampling device, wherein, this is adopted
Sampling device be by two half columns or so it is closed combine formed cylindrical column, rectangular shaped post, tetragonal prism, trapezoid cylinder or
Taper type cylinder.
3. according to claim 1 be suitable for coal seam gas production well packing CH_4 detection real-time sampling device, wherein, this is adopted
Sampling device is the cylindrical methane trap formed by the symmetrical closed combination of two semicylinders, two at closed combination
Semicylinder side hinge connection, opposite side are connected by openable lock, and cylindrical methane trapping is formed with closed combination
Device, two semicylinders are respectively independent to have upper planar base surface and lower planar base surface, two semicylinders upper planar base surface or under
Be equipped with semi-circular recesses on the inner edge of planar base surface, after the closed combination of two semicylinders, two half columns it is upper flat
Semi-circular recesses on the inner edge in face are combined into a circular hole, which wears for the bar sealing of drawing water of beam pumping unit
It crosses, the semi-circular recesses on the inner edge of the lower planar base surface of two semicircle main bodys combine to form another circular hole, which can
It is passed through for producing well bobbin seal.
4. the coal seam gas production well packing CH_4 detection real-time sampling described in any one of claim 1 to 3 that is suitable for fills
It puts, wherein, the center of circle that the circular hole formed is combined by the groove on the inner edge at the upper bottom of two half columns is located at common shape
Into upper bottom center, the center of circle of another circular hole formed is combined by the groove on the inner edge of the bottom of two and half main bodys
Positioned at the center for the bottom being collectively formed.
5. the coal seam gas production well packing CH_4 detection real-time sampling described in any one of claim 1 to 3 that is suitable for fills
It puts, wherein, the hinge connection is connected for spring hinge.
6. according to claim 4 be suitable for coal seam gas production well packing CH_4 detection real-time sampling device, wherein, it is described
Lock is connected as elastic lock connection.
7. the coal seam gas production well packing CH_4 detection real-time sampling described in any one of claim 1 to 3 that is suitable for fills
It puts, wherein, the diameter for the circular hole that upper surface is formed and the bar overall diameter base that draws water of coal seam gas production well beam pumping unit
This is identical, so that its bar that draws water can pass through the circular hole in the case of sealing and can move up and down.
8. according to claim 7 be suitable for coal seam gas production well packing CH_4 detection real-time sampling device, wherein, in institute
State the bar that draws water sets rubber washer to increase leakproofness with the circular hole contact position that the upper surface is formed.
9. the coal seam gas production well packing CH_4 detection real-time sampling described in any one of claim 1 to 3 that is suitable for fills
It puts, wherein, the circular hole that lower surface is formed and the overall diameter for producing casing are essentially identical, the production casing can be made to exist
The circular hole can be passed through in the case of sealing.
10. the coal seam gas production well packing CH_4 detection real-time sampling described in any one of claim 1 to 3 that is suitable for fills
It puts, wherein, the adjustable air admission hole can realize that charge flow rate adjusting range is 0~14L/min.
11. the coal seam gas production well packing CH_4 detection real-time sampling described in any one of claim 1 to 3 that is suitable for fills
It puts, wherein, the pumping unit is beam pumping unit.
12. one kind is suitable for coal seam gas production well packing CH_4 detection real-time sampling system, including appointing in claim 1~11
Sampling apparatus and gas-drying apparatus (10) and methane detector (11) described in one, the gas sampling hole (9) and the gas
The import of gas dryer (10) is connected, the outlet of the gas-drying apparatus (10) and the air inlet phase of the methane detector (11)
Even.
13. a kind of CH_4 detection method at coal seam gas production well packing using the sampling system described in claim 12, and is wrapped
Include following steps：
(1) sampling apparatus is installed：The lock (7) is first turned on, makes the groove set of a half column (4) bottom surface inner edge
In coal seam gas production well casing (12) outside, while it is that the groove of the inner edge of the half column upper bottom surface is sleeved on beam pumping unit
Bar (13) draw water outside, is then buckled another half column (5) in the half column (4) by latching (7), with the closed combination in left and right
The cylinder methane trap (1) of formation；
(2) bar that draws water (13) of beam pumping unit is made to work, the gas sampling gas inlet hole flow is adjusted, treats methane detector
(11) when gas flow data is stablized in, from the gas sampling mouth (9) by the methane gas being collected into through gas-drying apparatus
(10) methane detector (11) is introduced after drying and detects methane real-time concentration.
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