CN109630071A - Coal bed gas pumping method - Google Patents
Coal bed gas pumping method Download PDFInfo
- Publication number
- CN109630071A CN109630071A CN201811458663.2A CN201811458663A CN109630071A CN 109630071 A CN109630071 A CN 109630071A CN 201811458663 A CN201811458663 A CN 201811458663A CN 109630071 A CN109630071 A CN 109630071A
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- China
- Prior art keywords
- well
- bed gas
- seam
- coal seam
- coal bed
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/064—Deflecting the direction of boreholes specially adapted drill bits therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The present invention provides a kind of coal bed gas pumping methods, and the coal bed gas of the solid coal seam below working seam is located at for extraction, includes the following steps: the upper drill with ferrule directional well in the existing tunnel of working seam, directional well is made to extend to solid coal seam by ground；In the horizontal direction with brill positioning well at the position of the first preset distance of directional well interval, positioning well is made to extend to solid coal seam by ground；The horizontal well drilling in solid coal seam is connected to one end of horizontal well with positioning well, and the other end of horizontal well is connected to directional well；Abandoned well processing is made to the part positioning well being located above solid coal seam, abandoned well processing is made to the part directional well being located above working seam；Drainage device is installed at the communicating position of existing tunnel and directional well, coal bed gas extraction is carried out to solid coal seam.The present invention solves the problems, such as that coal bed gas pumping method in the prior art exists and takes up a large area and high production cost.
Description
Technical field
The present invention relates to energy extraction technical fields, in particular to a kind of coal bed gas pumping method.
Background technique
In the related technology, when being extracted to the coal bed gas of the solid coal seam below working seam, can only pass through
Ground extraction is realized, needs that additional extraction equipment is arranged on ground, can not utilize the existing tunnel of working seam, in this way,
The increase for not only resulting in occupied area also results in the increase of production cost.
Summary of the invention
The main purpose of the present invention is to provide a kind of coal bed gas pumping methods, are taken out with solving coal bed gas in the prior art
Mining method there are problems that taking up a large area and high production cost.
To achieve the goals above, the present invention provides a kind of coal bed gas pumping methods, are located at mine coal for extraction
The coal bed gas of the solid coal seam of layer lower section, includes the following steps: the upper drill with ferrule directional well in the existing tunnel of working seam,
Directional well is set to extend to solid coal seam by ground；It is bored in the horizontal direction at the position of the first preset distance of directional well interval
Well is positioned, positioning well is made to extend to solid coal seam by ground；The horizontal well drilling in solid coal seam, make one end of horizontal well with
Well connection is positioned, the other end of horizontal well is connected to directional well；Abandoned well is made to the part positioning well being located above solid coal seam
Processing makees abandoned well processing to the part directional well being located above working seam；Communicating position in existing tunnel and directional well
Place's installation drainage device, carries out coal bed gas extraction to solid coal seam.
Further, positioning well is bored in the upstream of the inclined direction along solid coal seam of directional well.
Further, the first preset distance is more than or equal to 1km and is less than or equal to 10km.
Further, after boring directional well to solid coal seam, continue to bore the second set distance downwards.
Further, the second set distance is more than or equal to 20m and is less than or equal to 50m.
Further, in boring the step of positioning well, the straight well section being connected and inclination section are successively bored, wherein inclination section
It is connected to solid coal seam.
Further, solid coal seam is multiple, and multiple solid coal seams are located at the lower section of working seam and along vertical
The setting of direction interval, inclination section be it is multiple, each solid coal seam passes through a corresponding inclination section connection.
Further, after the horizontal well drilling the step of, screen casing is set in horizontal well.
Further, the step of boring directional well includes: from ground using positioning drill bit along the vertical direction to solid coal seam
Bore location hole；Location hole is carried out in the junction of directional well and solid coal seam to expand chamber processing using chamber drill bit is expanded, to be formed
Expand chamber section.
Further, expanding in chamber section the inserting tube for placing rotary magnet range-measurement system, during horizontal well drilling, in water
The reception device of rotary magnet range-measurement system is placed in horizontal well, reception device and inserting tube cooperate, so that horizontal well and expansion chamber section are right
It connects.
Further, the diameter for positioning drill bit is greater than 89mm and is less than or equal to 200mm；The diameter for expanding chamber drill bit is more than or equal to
0.5m and be less than or equal to 1m, expand chamber section length be more than or equal to 1m and be less than or equal to 3m.
Further, at the position that horizontal well drilling expands chamber section 50m~100m to distance, rotary magnet ranging system is enabled
System.
Further, coal bed gas extraction is carried out to solid coal seam using negative pressure pumping method or pressure control pumping method.
It applies the technical scheme of the present invention, first in the upper drill with ferrule directional well in existing tunnel, extends to directional well by ground
Then solid coal seam makes to position well with brill positioning well at the position of the first preset distance of directional well interval in the horizontal direction
Solid coal seam is extended to by ground, later in the connectivity part of positioning well and solid coal seam, to directional well direction horizontal well drilling,
It is connected to one end of horizontal well with positioning well, the other end of horizontal well is connected to directional well；Again to above solid coal seam
Part positioning well make abandoned well processing, abandoned well processing is made to the part directional well being located above working seam, to guarantee not
Ground space is occupied, finally, installing drainage device at the communicating position of existing tunnel and directional well, solid coal seam is carried out
Coal bed gas extraction.The existing tunnel of working seam is utilized in coal bed gas pumping method provided by the present application, does not need to occupy ground
Space of planes does not need that additional extraction equipment is arranged on ground yet, has preferable economy and practicability.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows a kind of structural schematic diagram of the coal bed gas extraction of alternative embodiment according to the present invention.
Wherein, the above drawings include the following reference numerals:
1, working seam；2, existing tunnel；3, solid coal seam；4, estimated tunnel；10, directional well；20, well is positioned；
21, straight well section；22, inclination section；30, horizontal well；40, drainage device.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.It is right below
The description only actually of at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or use
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, shall fall within the protection scope of the present invention.
It is taken up a large area and high production cost to solve the problems, such as that coal bed gas pumping method in the prior art exists, this
Invention provides a kind of coal bed gas pumping method.
As shown in Figure 1, coal bed gas pumping method, the coal of the solid coal seam 3 of 1 lower section of working seam is located at for extraction
Layer gas, includes the following steps: the upper drill with ferrule directional well 10 in the existing tunnel 2 of working seam 1, prolongs directional well 10 by ground
Extend to solid coal seam 3；It is spaced in the horizontal direction with directional well 10 at the position of first preset distance and bores positioning well 20, it is fixed to make
Position well 20 extends to solid coal seam 3 by ground；The horizontal well drilling 30 in solid coal seam 3 makes one end of horizontal well 30 and determines
Position well 20 is connected to, and the other end of horizontal well 30 is connected to directional well 10；Well 20 is positioned to the part for being located at 3 top of solid coal seam
Make abandoned well processing, abandoned well processing is made to the part directional well 10 for being located at 1 top of working seam；In existing tunnel 2 and directional well
Drainage device 40 is installed at 10 communicating position, coal bed gas extraction is carried out to solid coal seam 3.
In this application, it first extends to directional well 10 by ground in the upper drill with ferrule directional well 10 in existing tunnel 2 and unminds
Then coal seam 3 is spaced at the position of the first preset distance in the horizontal direction with directional well 10 and bores positioning well 20, make to position well 20
Solid coal seam 3 is extended to by ground, later in the connectivity part of positioning well 20 and solid coal seam 3, is bored to 10 direction of directional well
Horizontal well 30 is connected to one end of horizontal well 30 with positioning well 20, and the other end of horizontal well 30 is connected to directional well 10；It aligns again
Part positioning well 20 above solid coal seam 3 makees abandoned well processing, to the part directional well 10 for being located at 1 top of working seam
Make abandoned well processing, to guarantee to be not take up ground space, finally, installing at the communicating position of existing tunnel 2 and directional well 10
Drainage device 40 carries out coal bed gas extraction to solid coal seam 3.Coal bed gas pumping method provided by the present application, is utilized and has opened
The existing tunnel 2 of mining coal seam, do not need occupy ground space, do not need that additional extraction equipment is arranged on ground yet, have compared with
Good economy and practicability.
In this application, abandoned well processing, which refers to, does abandoned well processing in well straight well section 21 and inclination section 22 mud of fetching water.
As shown in Figure 1, boring positioning well 20 in the upstream of the inclined direction along solid coal seam 3 of directional well 10.In this way, not
Working seam 3 has certain tilt angle relative to ground, and positioning well 20 is located to the upstream of directional well 10, and drainage device
40 are located at the communicating position in existing tunnel 2, directional well 10 and horizontal well 30, and coal bed gas is downward by upstream under gravity
Trip flowing, to be conducive to improve the extraction efficiency of coal bed gas.
Optionally, the first preset distance is more than or equal to 1km and is less than or equal to 10km.Coal-bed gas exploitation side provided by the present application
Method can be suitable for longer exploitation distance, to further improve the extraction efficiency of coal bed gas.
As shown in Figure 1, continuing to bore the second set distance downwards, to form use after boring directional well 10 to solid coal seam 3
The accommodation space of the foreign matters such as the sandstone generated during accommodating brill directional well 10.
Optionally, the second set distance is more than or equal to 20m and is less than or equal to 50m.The results showed the second preset distance exists
It when in above-mentioned numberical range, not only can guarantee that coal-bed gas exploitation had good economy, but also can guarantee that the volume of accommodation space is full
Sufficient requirement.
As shown in Figure 1, successively boring the straight well section 21 being connected and inclination section 22 in boring the step of positioning well 20, wherein
Inclination section 22 is connected to solid coal seam 3.During through positioning 20 horizontal well drilling 30 of well, it is contemplated that construction needs, and bores
After straight well section 21, inclination section 22 is bored, passes through 22 horizontal well drilling 30 of inclination section later.
Optionally, solid coal seam 3 is multiple, and multiple solid coal seams 3 are located at the lower section of working seam 1 and along vertical
The setting of direction interval, inclination section 22 be it is multiple, each solid coal seam 3 is connected to by a corresponding inclination section 22.This
Sample can carry out extraction to the coal bed gas of multiple solid coal seams 3 simultaneously, and the mining time is obviously shortened, further improves
The production efficiency of coal bed gas improves the safety of exploiting coal bed methane.
In specific embodiment shown in fig. 1, solid coal seam 3 is two, i.e., first drilled straight well 21 passes through a deflecting
Section 22 is connected to a solid coal seam 3 being located under working seam, continues horizontal well drilling 30 to orientation by the connectivity points
Well 10；It is connected to again by another inclination section 22 with another solid coal seam 3 being located under working seam later, by this
Connectivity points continue horizontal well drilling 30 to directional well 10.
Optionally, after horizontal well drilling 30 the step of, setting is used for the screen casing of sand control in horizontal well 30.
Optionally, the step of boring directional well 10 includes: from ground using positioning drill bit along the vertical direction to solid coal seam 3
Bore location hole；Location hole is carried out in the junction of directional well 10 and solid coal seam 3 to expand chamber processing using chamber drill bit is expanded, with shape
At expansion chamber section.
Optionally, the diameter for positioning drill bit is greater than 89mm and is less than or equal to 200mm；The diameter for expanding chamber drill bit is more than or equal to
0.5m and be less than or equal to 1m, expand chamber section length be more than or equal to 1m and be less than or equal to 3m.
Optionally, expanding in chamber section the inserting tube for placing rotary magnet range-measurement system, during horizontal well drilling 30, in water
The interior reception device for placing rotary magnet range-measurement system of horizontal well 30, reception device and inserting tube cooperate, so that horizontal well 30 and expansion chamber
Section docking.In this way, enabling the connectivity points of horizontal well 30 with directional well 10 and solid coal seam 3 by rotary magnet range-measurement system
Accurately dock.
Optionally, at the position that horizontal well drilling 30 expands chamber section 50m~100m to distance, rotary magnet ranging system is enabled
System.
Optionally, coal bed gas extraction is carried out to solid coal seam 3 using negative pressure pumping method or pressure control pumping method.Its
In, pressure control extraction more steadily the coal bed gas to solid coal seam can carry out extraction.
Optionally, drainage device 40 includes separator and buffer.
Coal bed gas pumping method provided by the present application bores directional well 10 on ground first, and the well location of directional well 10 is located at
The surface of working seam 1, and when boring directional well 10, it is desirable that directional well 10 is pre- by existing tunnel 2 and solid coal seam 3
Tunnel 4 is counted, continues to bore 20m~50m, well of having cemented the well of trapping after crossing solid coal seam 3；Coal is being unminded by expanding chamber drill bit later
Expand chamber at layer 3, determines the connectivity points coordinate of directional well 10 Yu solid coal seam 3；The position of upstream 1km~10km of tendency in coal seam
It sets place and bores positioning well 20, in 3 top directional inclination of solid coal seam to solid coal seam 3, start horizontal well drilling 30, distance orientation
Rotary magnet range-measurement system is opened at the position of connectivity points 50m~100m of well 10 and solid coal seam 3, make horizontal well 30 and is determined
It is accurately docked to well 10 with the connectivity points of solid coal seam 3, is laid with screen casing in horizontal well 30；Then it straight well section 21 and will make
Oblique section 22 mud of fetching water makees abandoned well processing, the truncation at directional well 10 with the existing tunnel 2 of working seam 1, i.e., to being located at
The part directional well 10 of 1 top of working seam makees abandoned well processing；Drainage device 40 is finally installed, the existing pump drainage system of coal mine is accessed
System carries out pressure control extraction or negative pressure extraction to solid coal seam 3, realizes to the pre- extraction of the coal bed gas of solid coal seam 3.
Coal bed gas pumping method provided by the present application, be utilized coal mine existing equipment to the coal bed gas of solid coal seam 3 into
The pre- extraction of row, can fully utilize coal mine existing equipment, it is no longer necessary to mining pipeline be arranged on ground, account for save ground
Ground reduces the production costs such as pipeline, water process, well workover, production management and monitoring device.
This method is particularly suitable for having exploited at present and still have multilayer high methane under working seam 1 unminds coal
The coal mine that layer 3 needs to exploit uses.After solid coal seam 3, which is put into, to be exploited, the drainage device 40 of working seam 1 is moved on to not
The estimated tunnel 4 of working seam 3, so that it may continue extraction coal bed gas, it can be achieved that drainage device 40 recycling and long-time
Effectively use.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
In the description of the present invention, it is to be understood that, the noun of locality such as " front, rear, top, and bottom, left and right ", " it is laterally, vertical,
Vertically, orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes
System, is merely for convenience of description of the present invention and simplification of the description, in the absence of explanation to the contrary, these nouns of locality do not indicate that
It must have a particular orientation or be constructed and operated in a specific orientation with the device or element for implying signified, therefore cannot manage
Solution is limiting the scope of the invention；The noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for
Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
The limitation of invention protection scope.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, work, device, component and/or their combination.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein can be in addition to illustrating herein
Or the sequence other than those of description is implemented.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of coal bed gas pumping method is located at the coal seam of the solid coal seam (3) below working seam (1) for extraction
Gas, which comprises the steps of:
Upper drill with ferrule directional well (10) in the existing tunnel (2) of the working seam (1), makes the directional well (10) by ground
Extend to the solid coal seam (3)；
It is spaced at the position of the first preset distance with the directional well (10) in the horizontal direction and bores positioning well (20), it is described fixed to make
Position well (20) extends to the solid coal seam (3) by ground；
In the solid coal seam (3) interior horizontal well drilling (30), make one end of the horizontal well (30) and the positioning well (20)
Connection, the other end of the horizontal well (30) are connected to the directional well (10)；
Abandoned well processing is made to the part positioning well (20) being located above the solid coal seam (3), has been opened positioned at described
The part directional well (10) above mining coal seam (1) makees abandoned well processing；
Drainage device (40) are installed at the communicating position of the existing tunnel (2) and the directional well (10), are not opened described
Mining coal seam (3) carries out coal bed gas extraction.
2. coal bed gas pumping method according to claim 1, which is characterized in that the directional well (10) along it is described not
Bore the positioning well (20) in the upstream of the inclined direction of working seam (3).
3. coal bed gas pumping method according to claim 1, which is characterized in that first preset distance is more than or equal to
1km and be less than or equal to 10km.
4. coal bed gas pumping method according to claim 1, which is characterized in that bore the directional well (10) and do not opened to described
After mining coal seam (3), continue to bore the second set distance downwards.
5. coal bed gas pumping method according to claim 4, which is characterized in that second set distance is more than or equal to
20m and be less than or equal to 50m.
6. coal bed gas pumping method according to claim 1, which is characterized in that in the step of boring positioning well (20)
In, successively bore the straight well section (21) being connected and inclination section (22), wherein the inclination section (22) and the solid coal seam
(3) it is connected to.
7. coal bed gas pumping method according to claim 6, which is characterized in that the solid coal seam (3) be it is multiple, it is more
A solid coal seam (3) is located at the lower section of working seam (1) and interval setting along the vertical direction, the inclination section
(22) to be multiple, each solid coal seam (3) passes through the corresponding inclination section (22) connection.
8. coal bed gas pumping method according to claim 1, which is characterized in that in the step of boring horizontal well (30)
Afterwards, screen casing is set in the horizontal well (30).
9. coal bed gas pumping method according to claim 1, which is characterized in that the step of boring the directional well (10) is wrapped
It includes:
Location hole is bored to the solid coal seam (3) along the vertical direction from ground using positioning drill bit；
The location hole is expanded in the directional well (10) and the junction of the solid coal seam (3) using chamber drill bit is expanded
Chamber processing expands chamber section to be formed.
10. coal bed gas pumping method according to claim 9, which is characterized in that place rotary magnetic in the expansion chamber section
The inserting tube of iron range-measurement system places the rotary magnetic during boring horizontal well (30) in the horizontal well (30)
The reception device of iron range-measurement system, the reception device and the inserting tube cooperate, so that the horizontal well (30) and the expansion chamber
Section docking.
11. coal bed gas pumping method according to claim 9, which is characterized in that the diameter of the positioning drill bit is greater than
89mm and be less than or equal to 200mm；The diameter for expanding chamber drill bit is more than or equal to 0.5m and is less than or equal to 1m, the length for expanding chamber section
Degree is more than or equal to 1m and is less than or equal to 3m.
12. coal bed gas pumping method according to claim 10, which is characterized in that boring the horizontal well (30) to distance
At the position for expanding chamber section 50m~100m, the rotary magnet range-measurement system is enabled.
13. coal bed gas pumping method according to claim 1, which is characterized in that taken out using negative pressure pumping method or pressure control
Mining method carries out coal bed gas extraction to the solid coal seam (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811458663.2A CN109630071A (en) | 2018-11-30 | 2018-11-30 | Coal bed gas pumping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811458663.2A CN109630071A (en) | 2018-11-30 | 2018-11-30 | Coal bed gas pumping method |
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| CN109630071A true CN109630071A (en) | 2019-04-16 |
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ID=66070607
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| CN201811458663.2A Pending CN109630071A (en) | 2018-11-30 | 2018-11-30 | Coal bed gas pumping method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980643A (en) * | 2020-09-01 | 2020-11-24 | 中联煤层气有限责任公司 | Coal bed gas horizontal well construction method and coal bed gas horizontal well |
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| CN106930733A (en) * | 2017-05-10 | 2017-07-07 | 中国神华能源股份有限公司 | Coal bed gas group wells extraction system and method for construction |
| CN107152261A (en) * | 2017-05-10 | 2017-09-12 | 中国神华能源股份有限公司 | Coal bed gas extraction system and method for construction |
| CN107083947A (en) * | 2017-05-23 | 2017-08-22 | 中国神华能源股份有限公司 | The gang of wells and its process for constructing of synchronous extraction coal bed gas up and down |
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| CN111980643A (en) * | 2020-09-01 | 2020-11-24 | 中联煤层气有限责任公司 | Coal bed gas horizontal well construction method and coal bed gas horizontal well |
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