CN203925396U - A kind of coal bed gas extraction hole sealing device - Google Patents
A kind of coal bed gas extraction hole sealing device Download PDFInfo
- Publication number
- CN203925396U CN203925396U CN201420167163.4U CN201420167163U CN203925396U CN 203925396 U CN203925396 U CN 203925396U CN 201420167163 U CN201420167163 U CN 201420167163U CN 203925396 U CN203925396 U CN 203925396U
- Authority
- CN
- China
- Prior art keywords
- sealing device
- outer connecting
- coal bed
- gas extraction
- connecting pipe
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model discloses a kind of coal bed gas extraction hole sealing device, wherein, this device comprises: drainage tube; Two expansion water bags, described drainage tube passes from described expansion water bag; Water pipe, is connected by described water pipe between two expansion water bags, on described water pipe, is provided with valve; Outer connecting pipe, is arranged between described two expansion water bags, is enclosed within the outside of described drainage tube and described water pipe; Two inner lining films, the two ends of each inner lining film are separately fixed on the inwall of described outer connecting pipe, and two inner lining films form two material chambeies with described outer connecting pipe respectively; On the corresponding outer connecting pipe in each material chamber, be provided with opening, described opening is by stopper shutoff.The coal bed gas extraction hole sealing device that the utility model provides, by the parts such as expansion water bag are set, utilizes hydraulic pressure to extrude the mode that polyurethane material solidifies, and solved polyurethane material in prior art and solidified early, and the bad defect of sealing of hole effect.
Description
Technical field
The utility model relates to the gas pumping technology in coal mining, relates in particular to a kind of coal bed gas extraction hole sealing device.
Background technology
Gas pumping is essential measure and the main path of control of coalmine gas, and the sealing of hole effect of extraction borehole has larger impact to extracting result, is mainly manifested in: boring gas leak phenomenon is serious, and gas extraction concentration is too low.Because mash gas pumping drilling sealing of hole is not tight, gas leak phenomenon is serious, make the gas extraction concentration in a lot of mining areas not reach utilizable concentration, make gas utilization become difficulty, have to low concentration gas to be discharged among atmosphere, this not only causes the huge waste of gas resources, but also can cause the pollution to atmosphere.
Coal bed gas extraction sealing of hole mainly contains mechanical type, inorganic material and three kinds of modes of high-molecular organic material at present.
Mechanical type sealing of hole is applicable to short time, short-range provisional gas pumping sealing of hole, and cost is higher, seldom application.
Inorganic material is mainly cement additire, and this kind of sealing of hole cost is low, but setting time is longer, and sealing of hole speed is slow, and cement can shrink and produce crack and cause sealing of hole not tight sometimes.
High-molecular organic material is mainly to adopt polyurethane to carry out sealing of hole, and this material mixes fast foaming by two kinds of components and solidifies, and coefficient of foaming is high, solidifies sealing of hole rapid, thereby is widely applied in gas pumping sealing of hole.While adopting polyurethane sealing of hole, conventionally after the material of above-mentioned two kinds of components is mixed in aperture, more evenly spread upon on towel or burlap, then towel or rag are wrapped in and on drainage tube, send into boring precalculated position.The time of solidifying due to the material mixing post-foaming of above-mentioned two kinds of components is within 5 minutes, when running into boring deeply or hole collapse hole, there will be drainage tube to send the phenomenon with regard to foamed set less than boring precalculated position, the material of two kinds of components expands in boring free space simultaneously, also limited to the sealing of hole ability of extraction borehole circumferential crack.
Utility model content
The utility model provides a kind of coal bed gas extraction hole sealing device, to solve the problems of the prior art, improves sealing of hole effect.
The utility model provides a kind of coal bed gas extraction hole sealing device, wherein, comprising:
Drainage tube;
Two expansion water bags, described drainage tube passes from described expansion water bag;
Water pipe, is connected by described water pipe between two expansion water bags, on described water pipe, is provided with valve;
Outer connecting pipe, is arranged between described two expansion water bags, and described outer connecting pipe is enclosed within the outside of described drainage tube and described water pipe, makes two formation closed areas, region between expansion water bag;
Two inner lining films, the two ends of each inner lining film are separately fixed on the inwall of described outer connecting pipe, and two inner lining films form two material chambeies with described outer connecting pipe respectively; On the corresponding outer connecting pipe in each material chamber, be provided with opening, described opening is by stopper shutoff.
Coal bed gas extraction hole sealing device as above, wherein, preferably, also comprises: admitting pipe joint, described admitting pipe joint is arranged on any expansion water bag, for water filling in expansion water bag.
Coal bed gas extraction hole sealing device as above, wherein, preferably: described outer connecting pipe is comprised of two sections of tube connectors, connects by two-way connector between two sections of tube connectors.
Coal bed gas extraction hole sealing device as above, wherein, preferably: described water pipe and described drainage tube be arranged in parallel.
Coal bed gas extraction hole sealing device as above, wherein, preferably: described inner lining film is rubber membrane.
Coal bed gas extraction hole sealing device as above, wherein, preferably: described stopper is plug.
The coal bed gas extraction hole sealing device that the utility model provides, by the parts such as expansion water bag are set, utilizes hydraulic pressure to extrude the mode that polyurethane material solidifies, and solved polyurethane material in prior art and solidified early, and the bad defect of sealing of hole effect.
Accompanying drawing explanation
The coal bed gas extraction hole sealing device structural representation that Fig. 1 provides for the utility model;
Fig. 2 be in Fig. 1 A-A to sectional view;
The coal bed gas extraction method for sealing schematic flow sheet that Fig. 3 provides for the utility model.
The specific embodiment
Below in conjunction with embodiment, the utility model is elaborated.
The coal bed gas extraction hole sealing device structural representation that Fig. 1 provides for the utility model, Fig. 2 be in Fig. 1 A-A to sectional view.As depicted in figs. 1 and 2, the utility model embodiment provides a kind of coal bed gas extraction hole sealing device, comprises drainage tube 1, two expansion water bags 2, water pipe 3, outer connecting pipe 4 and two inner lining films 5.
Drainage tube 1 adopts conventional drainage tube in prior art, and drainage tube 1 passes from expansion water bag 2.In other words, expansion water bag 2 is enclosed within the outside of drainage tube 1.Water pipe 3, by realizing and being communicated with between two expansion water bags 2, is provided with valve 6 on water pipe 3.When an expansion water bag 2 interior water filling wherein, water can flow to another expansion water bag 2 along water pipe 3.Outer connecting pipe 4 is arranged between two expansion water bags 2, and this outer connecting pipe 4 is enclosed within the outside of above-mentioned drainage tube 1 and water pipe 3, makes two formation closed areas, region between expansion water bag 2.
Preferably, water pipe 3 be arranged in parallel with drainage tube 1, to avoid whole hole sealing device in installation process, between water pipe 3 and drainage tube 1, interferes.
Outer connecting pipe 4 can be the pipe of a global formation, can be also that segmentation grafting forms, and preferably, outer connecting pipe 4 is comprised of two sections of tube connectors, between two sections of tube connectors, by two-way connector 7, connects.Each tube connector all can be for secure liner film 5, with the accommodating polyurethane material for sealing of hole.
Particularly, this hole sealing device also comprises two inner lining films 5, and the two ends of each inner lining film 5 are separately fixed on the inwall of outer connecting pipe 4, and when outer connecting pipe 4 is an integral tube, two inner lining films 5 are all fixed in this integral tube.When outer connecting pipe 4 is two sections of tube connectors, on each tube connector, fix an inner lining film 5.
Two inner lining films 5 form two material chambeies 8 with above-mentioned outer connecting pipe 4 respectively, for accommodating polyurethane material, on the corresponding outer connecting pipe 4 in each material chamber 8, are provided with opening, and opening is by stopper 9 shutoff.
The coal bed gas extraction method for sealing schematic flow sheet that Fig. 3 provides for the utility model, the method that adopts above-mentioned hole sealing device to carry out shutoff comprises the steps:
Step a, to two material, inject respectively polyurethane A material and polyurethane B material in chambeies.Polyurethane A material and polyurethane B material can adopt material of the prior art, have multiplely, can select as the case may be, and the component of polyurethane A material and polyurethane B not being expected at this does not limit.
After hole sealing device is connected, the stopper 9 of outer connecting pipe 4 upper sheds is pulled out, inject polyurethane A material and polyurethane B material, then by stopper 9 beyond the Great Wall.Material chamber 8 is surrounded by inner lining film 5 and outer connecting pipe 4, and inner lining film 5 can be rubber film, and the two ends of rubber film are fixed on the inwall of outer connecting pipe 4 by gluing pressing process, form airtight annular space.
Step b, to water filling in an expansion water bag, to two expansion water bag Expansion sealings two ends of firmly holing, realize the sealing for the first time of extraction borehole.
Preferably, hole sealing device also comprises: admitting pipe joint 10, this admitting pipe joint 10 is arranged on any expansion water bag 2, for to the interior water filling of expansion water bag 2.Open inlet valve, by admitting pipe joint 10 to 2 water fillings of expansion water bag.
Step c, continuation water filling, when the force value in water pipe arrives setting value, valve open, water enters into the cavity between inner lining film and drainage tube and water pipe, water extruding inner lining film, polyurethane A material and polyurethane B material are opened stopper extruding respectively, and polyurethane A material and polyurethane B expect the zone freezing sealing at expansion water bag, realize the secondary seal of extraction borehole.
Stopper 9 can adopt plug of the prior art, and the good springiness of plug, easily ejects when stressed.When extraneous water is entered into expansion water bag 2 and reached after certain pressure by admitting pipe joint 10, valve 6 in water pipe 3 will be opened by hydraulic pressure, there is certain pressure reduction in valve 6 places, thereby has all the time enough bulbs of pressure in the water bag 2 that makes to expand, can be because of the release completely of opening of valve 6.
Coal bed gas extraction hole sealing device and method for sealing tool that the utility model embodiment provides have the following advantages:
1, polyurethane A material and polyurethane B material are delivered to behind extraction borehole precalculated position at hole sealing device, by hydraulic pressure, squeeze out, mixed expanded solidifying again, solved in prior art, polyurethane A material and polyurethane B material outside boring mixed expanded solidify too fast, the defect with regard to having solidified when not sending into extraction borehole precalculated position.
2, in the hole sealing device that the present embodiment provides, first two expansion water bags expand under Water Pressure, realize the once sealing of boring and form the enclosure space that polyurethane solidifies.When polyurethane A material and polyurethane B material are during mixed expanded the solidifying of extruding, be to carry out at enclosure space, thereby can form enough support shut-off capacitys to borehole circumference crack during expansion, sealing of hole effect is than good at free space.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (6)
1. a coal bed gas extraction hole sealing device, is characterized in that, comprising:
Drainage tube;
Two expansion water bags, described drainage tube passes from described expansion water bag;
Water pipe, is connected by described water pipe between two expansion water bags, on described water pipe, is provided with valve;
Outer connecting pipe, is arranged between described two expansion water bags, and described outer connecting pipe is enclosed within the outside of described drainage tube and described water pipe, makes two formation closed areas, region between expansion water bag;
Two inner lining films, the two ends of each inner lining film are separately fixed on the inwall of described outer connecting pipe, and two inner lining films form two material chambeies with described outer connecting pipe respectively; On the corresponding outer connecting pipe in each material chamber, be provided with opening, described opening is by stopper shutoff.
2. coal bed gas extraction hole sealing device according to claim 1, is characterized in that, also comprises: admitting pipe joint, described admitting pipe joint is arranged on any expansion water bag, for water filling in expansion water bag.
3. coal bed gas extraction hole sealing device according to claim 1, is characterized in that: described outer connecting pipe is comprised of two sections of tube connectors, between two sections of tube connectors, by two-way connector, connects.
4. according to the arbitrary described coal bed gas extraction hole sealing device of claim 1-3, it is characterized in that: described water pipe and described drainage tube be arranged in parallel.
5. according to the arbitrary described coal bed gas extraction hole sealing device of claim 1-3, it is characterized in that: described inner lining film is rubber membrane.
6. according to the arbitrary described coal bed gas extraction hole sealing device of claim 1-3, it is characterized in that: described stopper is plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167163.4U CN203925396U (en) | 2014-04-08 | 2014-04-08 | A kind of coal bed gas extraction hole sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167163.4U CN203925396U (en) | 2014-04-08 | 2014-04-08 | A kind of coal bed gas extraction hole sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203925396U true CN203925396U (en) | 2014-11-05 |
Family
ID=51821225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420167163.4U Withdrawn - After Issue CN203925396U (en) | 2014-04-08 | 2014-04-08 | A kind of coal bed gas extraction hole sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203925396U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924943A (en) * | 2014-04-08 | 2014-07-16 | 神华集团有限责任公司 | Coal seam gas extraction hole sealing device and hole sealing method |
| CN108316964A (en) * | 2018-02-01 | 2018-07-24 | 西安科技大学 | A kind of low air permeability coal seam pressure relief gas pumping mining method |
-
2014
- 2014-04-08 CN CN201420167163.4U patent/CN203925396U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924943A (en) * | 2014-04-08 | 2014-07-16 | 神华集团有限责任公司 | Coal seam gas extraction hole sealing device and hole sealing method |
| CN103924943B (en) * | 2014-04-08 | 2017-01-04 | 神华集团有限责任公司 | A kind of coal bed gas extraction hole sealing device and method for sealing |
| CN108316964A (en) * | 2018-02-01 | 2018-07-24 | 西安科技大学 | A kind of low air permeability coal seam pressure relief gas pumping mining method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2018145391A1 (en) | Dynamic water replenishing hole sealing method by means of high water-absorbent resin | |
| CN104563958B (en) | A kind of hole sealing device | |
| CN103075128A (en) | Method for sealing gas extraction drill holes | |
| CN102747980A (en) | Expansion type multi-grade pressurized rapid hole sealing technology | |
| CN103195388A (en) | Two-plugging hole packer and plugging grouting method | |
| CN102678083A (en) | Grouting method and grouting device | |
| CN102071898A (en) | Self-formed baffle and reaction type foam hole sealing device thereof | |
| CN210977392U (en) | Gas drainage drilling hole sealing device | |
| CN102913184A (en) | Secondary composite high-pressure grouting and sealing process of gas drainage drilling artificial separation barrier | |
| CN203925396U (en) | A kind of coal bed gas extraction hole sealing device | |
| CN102877882A (en) | Method for plugging methane gas extraction hole | |
| WO2009149458A8 (en) | Compression sealing apparatus and method for use of the same | |
| CN103485742A (en) | Mechanical sealing plug capable of quickly and simply stopping mortar/water and mounting method of mechanical sealing plug | |
| CN207048813U (en) | Sealing and leakage plugging device for gas pumping | |
| CN103924943A (en) | Coal seam gas extraction hole sealing device and hole sealing method | |
| CN201351479Y (en) | Gas drainage secondary high pressure grouting hole sealing device | |
| CN202544903U (en) | Hole packer | |
| CN201934051U (en) | Self-forming baffle and reactive foam sealing device thereof | |
| CN105317397A (en) | Double cloth bags type grouting sealing set and method | |
| EP3234438B1 (en) | Systems, compositions and methods for curing leakages in pipes | |
| CN210370586U (en) | Water outlet elevation drilling and grouting water stopping device | |
| CN204532411U (en) | A kind of extension type flushing type gas drainage hole-sealing device | |
| CN103527242A (en) | United under pressure gas drainage hole sealing method and applied double-layer expansion rubber pipes thereof | |
| CN207761621U (en) | A kind of coal mine gas extraction drill hole plugging equipment | |
| CN203130028U (en) | Double-plugging hole packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20170104 |