CN204457719U - A kind of peupendicular hole - Google Patents
A kind of peupendicular hole Download PDFInfo
- Publication number
- CN204457719U CN204457719U CN201520087192.4U CN201520087192U CN204457719U CN 204457719 U CN204457719 U CN 204457719U CN 201520087192 U CN201520087192 U CN 201520087192U CN 204457719 U CN204457719 U CN 204457719U
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- coal seam
- vertical well
- blasting
- well according
- casing
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- 239000003245 coal Substances 0.000 claims abstract description 107
- 238000005422 blasting Methods 0.000 claims description 80
- 239000002360 explosive Substances 0.000 claims description 32
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 15
- 239000001569 carbon dioxide Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 238000002309 gasification Methods 0.000 abstract description 8
- 238000004880 explosion Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 8
- 238000005474 detonation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses a kind of peupendicular hole, this peupendicular hole comprises peupendicular hole body, in peupendicular hole body, be provided with sleeve pipe; Sleeve pipe comprises the coal seam casing section corresponding with coal seam, is provided with explosion assembly in the predetermined altitude interval of coal seam casing section.When peupendicular hole is converted to outlet passageway by inlet channel, by the sleeve pipe in predetermined altitude interval, explosion component failures coal seam and cement sheath, carry out loose to the bottom in coal seam simultaneously and make gap, thus form larger cavity, peupendicular hole is not easily blocked when giving vent to anger, thus realize the quick switching that vertical borehole plays different phase function, for whole process for underground gasification provides reliable guarantee.
Description
Technical Field
The utility model relates to a coal gasification field, in particular to vertical well.
Background
In the underground coal gasification process, a vertical well is a commonly used well, and the gas inlet and outlet functions of the vertical well are often converted, so that when the vertical well hole is used as a gas inlet well, the vertical well hole plays a role in injecting fluid and manufacturing cracks. At this moment, the drilling process aspect needs to require that the casing position is at the coal seam low level, and the coal seam low level is a certain distance from the coal seam floor promptly, and the purpose is to prevent losing of coal. The prior art is about 1 meter above the coal seam floor, and the distance can be adjusted according to specific actual conditions. After fracturing and crack making, the vertical well hole is communicated with the left fire zone through the coal seam crack, then flame is guided to the bottom of the vertical well hole through the coal seam crack to form an initial narrow gasification channel, and then the channel is processed to enable the channel to reach a certain width. In the gasification process, the channel can already convey fluid, the vertical well hole serving as the gas inlet can be switched to a gas outlet well hole for use, and the functions of outputting combustible gas, carrying moisture, adjusting the pressure of the system and the like are achieved. From the actual process requirement, the vertical well hole which plays a role of air inlet and the vertical well hole which plays a role of air outlet are different in structure, the air inlet position of the sleeve is required to be close to the bottom plate of the coal bed as much as possible during air inlet so as to prevent coal loss, and the air outlet position of the sleeve is required to be close to the top plate of the coal bed as much as possible during air outlet so as to prevent coal gas entrainment matters such as ash residues and the like from being gathered at the bottom of the hole to influence normal.
After ignition and channel processing are finished, an initial fire area is arranged at the bottom of a vertical hole, but the air outlet effect of the vertical well hole is influenced by insufficient cracks of a casing pipe and a casing cement sheath of a coal seam section and a surrounding coal seam, and the space of the bottom of the hole is small at the initial stage of ignition to the bottom of the well hole, so that the bottom of the hole is easily blocked by coal gas carry-over substances, ash residues and the like.
Although in actual operation, the casing of the coal seam section can be selected from casings which are the same as or different from other sections (such as glass reinforced plastic casings), particularly glass casings, and are easy to burn after flames reach the bottom of a hole, the cement sheath outside the glass reinforced plastic casing still has an influence on gas outlet.
Disclosure of Invention
When passing in and out the gas function conversion in order to solve present vertical well, the technical problem that normally gives vent to anger is influenced, the utility model provides a vertical well.
The utility model provides a vertical well, which comprises a vertical well body,
a sleeve is arranged in the vertical well body;
the casing comprises a coal seam casing section corresponding to the coal seam,
and a blasting assembly is arranged in the preset height interval of the coal seam casing pipe section.
Furthermore, the blasting assembly comprises a blasting object and a blasting object installation device arranged on the coal seam casing section;
the blasting object is separated from the top plate of the coal seam by a first preset distance;
the blasting object is spaced a second predetermined distance from the floor of the coal seam.
Further, the blast mounting apparatus comprises a containment jacket;
the blasting object is arranged in the closed jacket.
Further, the blast mounting apparatus includes an opening clamp;
the blasting object is arranged on the open clamp body; wherein,
the blasting object is provided with a waterproof layer.
Further, the first predetermined distance is 0.5 m to 1 m; and/or the presence of a gas in the gas,
the second predetermined distance is between 0.5 and 1 meter.
Further, the blasting object is a device for blasting at a preset temperature.
Further, the explosive is an explosive or liquid carbon dioxide device.
Further, the explosive device is used for detonating the explosive substance.
Further, the detonation device is a device for raising the temperature of the explosive or the liquid carbon dioxide device to a predetermined burst value.
Further, the open clamp body is an L-shaped clamp body.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a vertical well, which comprises a vertical well body, wherein a sleeve is arranged in the vertical well body; the sleeve pipe includes the coal seam casing pipe section that corresponds with the coal seam, is provided with the blasting subassembly in the predetermined high interval of coal seam casing pipe section. When changing the vertical well into the passageway of giving vent to anger by inlet channel, destroy sleeve pipe and cement sheath in the interval of coal seam predetermined height through the blasting subassembly, loosen and make the clearance to the bottom in coal seam simultaneously to form great cavity, make vertical well be difficult for blockking up when giving vent to anger, thereby realize the quick switch-over of perpendicular wellhole performance different stage function, provide reliable guarantee for whole underground gasification technology.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic diagram of a vertical well disposed in a coal seam according to the present invention;
fig. 2 is a schematic block diagram of a structure of a blasting object installation device on a coal seam casing section according to a first embodiment of the present invention;
fig. 3 is a block diagram of a structure of a blasting object installation device on a coal seam casing segment in the second embodiment of the present invention.
1. A vertical well body; 2. a coal seam; 21. a top plate; 22. a base plate; 3. a blasting assembly; 31. closing the jacket; 32. opening the clamp body; 4. a sleeve; 41. a coal seam casing section.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The preferred embodiments of the present invention will be further described with reference to the accompanying drawings:
the horizontal planes mentioned in the following examples are all planes perpendicular to the direction of gravity. Fig. 1 is a schematic structural view of the vertical well arranged underground, the blasting object installation device of the vertical well can be selected to be a closed jacket or an open clamp, fig. 2 is a schematic structural view of the closed jacket, fig. 3 is a schematic structural view of the open clamp, and the embodiment of the present invention is described in detail below by using a first embodiment and a second embodiment according to two different options.
Example one
As shown in fig. 1 and 2, the vertical well comprises a vertical well body 1, wherein a casing 4 is arranged in the vertical well body 1; the casing 4 comprises a coal seam casing section 41 corresponding to the coal seam 2, and the blasting assembly 3 can be arranged in a preset height interval of the coal seam casing section 41 before the casing 4 is lowered into the vertical well body 1; the blasting component 3 is used for blasting partial casing pipes in the coal seam casing pipe section 41 area, surrounding cement sheath and coal seam, and simultaneously loosening and forming gaps on the coal seam 2, so that a large cavity is formed, the vertical well is not easy to block when air is given out, the vertical well hole can be quickly switched to play different stage functions, and the reliable guarantee is provided for the whole underground gasification process.
The preferred blasting component 3 of the embodiment of the utility model comprises a blasting object and a blasting object installation device which is arranged on the coal seam casing pipe section 41 and is used for installing the blasting object; the mounted blasting object is spaced from the top plate 21 of the coal seam 2 by a first preset distance; the explosives are spaced a second predetermined distance from the floor 22 of the coal seam 2.
Wherein the first predetermined distance is 0.5 m to 1 m, and the second predetermined distance is 0.5 m to 1 m; by spacing the blasting object and the top plate 21 of the coal seam 2 by a first preset distance, the blasted coal seam is convenient to outgas under the condition that the blasting object does not damage the top plate 21 of the coal seam 2; and the loss of the coal mining quantity of the gasified coal mining coal seam is reduced under the condition that the blasting object does not damage the bottom plate 22 of the coal seam 2.
The embodiment of the utility model provides an optimal blasting thing is the explosive or the liquid carbon dioxide device that high temperature takes place to blast in advance.
A preferred blasting object installation device of the embodiment of the utility model is a closed jacket 31 installed on a coal seam casing pipe section 41; disposing a blasting substance within the enclosing jacket 31; as shown in fig. 2, the blasting material is detonated by using a detonating device, the detonating device is a device for guiding a fire zone to the bottom of the vertical well body, and with the gradual rise of the temperature of the bottom of the vertical well body 1, when the temperature rises to 300 ℃ or above, an explosive or liquid carbon dioxide device arranged in the closed jacket 31 is blasted, and the blasting can damage the coal seam casing section 41, the well cement and the surrounding coal seam, so that the vertical well body 1 can form a large cavity at the bottom of the vertical well body more easily, and conditions are created for next gas outlet.
Of course, in other embodiments, other explosive mounting means than the closed jacket 31 may be selected, such as the open collet configuration described in example two.
In other embodiments, the blasting substance may be a device other than an explosive or liquid carbon dioxide device that blasts at a predetermined temperature; and when other blasting objects are selected, the first preset distance from the blasting object to the top plate 21 of the coal seam 2 and the second preset distance from the bottom plate 22 of the coal seam 2 can be set according to the blasting range of the blasting object, so long as the blasting object is ensured not to damage the structure of the top plate and the bottom plate of the coal seam, the coal seam can be conveniently vented after blasting, the loss of the coal mining amount of the gasified coal mining coal seam can be reduced, the specific structure can refer to the description of the above embodiment, and the detailed description is omitted here.
In other embodiments, the detonating device may be another device that raises the temperature of the explosive or the liquid carbon dioxide device to a predetermined burst value; for a specific structure, reference may be made to the description of the above embodiments, which is not repeated herein.
In other embodiments, the blasting assembly can also be selected from other blasting and assembling modes as long as the purpose of the utility model can be realized; for a specific structure, reference may be made to the description of the above embodiments, which is not repeated herein.
As shown in fig. 1 and fig. 2, a specific arrangement method according to the first embodiment of the present invention is:
firstly, mounting explosive substances which are explosives or liquid carbon dioxide devices for carrying out high-temperature explosion in advance in a closed jacket 31 on a coal seam casing section 41, putting the explosive substances into the bottom area of a vertical well body 1 when a casing 4 is lowered during well drilling and completion,
wherein the blasting object takes temperature as a detonation condition; when the blasting objects are arranged, the distance between the blasting objects and the top plate 21 of the coal seam 2 is 0.5-1 meter, and the distance between the blasting objects and the bottom plate 22 of the coal seam 2 is 0.5-1 meter. The overall principle is to ensure that the coal seam is convenient to vent after blasting under the condition that blasting objects do not damage the top plate 21 and the bottom plate 22 of the coal seam 2, and reduce the loss of the coal mining quantity of the gasified coal mining coal seam.
Step two, detonating the explosive or liquid carbon dioxide device by using a detonating device; the fire area can be led to the bottom of the vertical well body 1 through a technological means, along with the gradual rise of the bottom temperature of the vertical well body 1, when the temperature rises to 300 ℃ or above, the explosive or liquid carbon dioxide device arranged in the closed jacket 31 can be exploded, the explosion can destroy the sleeve pipe of the explosive part arranged on the sleeve pipe section of the coal seam, well cement and the surrounding coal seam, so that the vertical well body 1 can form a large cavity at the bottom of the vertical well body more easily, and conditions are created for the next step of gas outlet.
Example two
As shown in fig. 1 and 3, the vertical well comprises a vertical well body 1, wherein a casing 4 is arranged in the vertical well body 1; the casing 4 comprises a coal seam casing section 41 corresponding to the coal seam 2, and the blasting assembly 3 can be arranged in a preset height interval of the coal seam casing section 41 before the casing 4 is arranged below the vertical well body 1; the blasting component 3 is used for blasting the casing of a certain area of the coal seam casing section 41, the cement sheath around the casing and the coal seam, and meanwhile, the coal seam 2 is loosened and gapped to form a large cavity, so that the vertical well is not easy to block when air is given out, the vertical well hole can be quickly switched to play different stage functions, and the whole underground gasification process is reliably guaranteed.
The preferred blasting component 3 of the second embodiment of the utility model comprises a blasting object and a blasting object installation device which is arranged on the coal seam casing pipe section 41 and is used for installing the blasting object; the mounted blasting object is spaced from the top plate 21 of the coal seam 2 by a first preset distance; the explosives are spaced a second predetermined distance from the floor 22 of the coal seam 2.
Wherein the first predetermined distance is 0.5 m to 1 m, and the second predetermined distance is 0.5 m to 1 m; the blasting object is separated from the top plate 21 of the coal seam 2 by a first preset distance, so that the blasted coal seam is convenient to outgas under the condition that the blasting object does not damage the top plate 21 of the coal seam 2; and the loss of the coal mining quantity of the gasified coal mining coal seam is reduced under the condition that the blasting object does not damage the bottom plate 22 of the coal seam 2.
The embodiment of the utility model provides a second preferred blasting thing is the explosive or the liquid carbon dioxide device that high temperature takes place to blast in advance.
The second preferred blasting object installation device of the embodiment of the present invention is an open clamp 32 installed on the coal seam casing section 41, the open clamp 32 is an L-shaped clamp, the blasting object is disposed on the open clamp 32, and a waterproof layer is further disposed on the blasting object; prevent the explosive from being damaged by moisture before detonation. As shown in fig. 3, the blasting material is detonated by using a detonating device, the detonating device is a device for guiding a fire zone to the bottom of the vertical well body, and with the gradual rise of the temperature of the bottom of the vertical well body 1, when the temperature rises to 300 ℃ or above, an explosive or liquid carbon dioxide device arranged in the closed jacket 31 is blasted, and the blasting can damage the coal seam casing section 41, the well cement and the surrounding coal seam, so that the vertical well body 1 can form a large cavity at the bottom of the vertical well body more easily, and conditions are created for next gas outlet.
As shown in fig. 1 and fig. 3, a specific arrangement method of the second embodiment of the present invention is:
firstly, mounting explosive substances on an open clamp 32 on a coal seam casing section 41 in advance, arranging a waterproof layer on the outer layer of the explosive substances, putting the explosive substances into the bottom area of a vertical well body 1 when a casing 4 is lowered during well drilling and completion,
wherein the blasting object takes temperature as a detonation condition; when the blasting objects are arranged, the distance between the blasting objects and the top plate 21 of the coal seam 2 is 0.5-1 meter, and the distance between the blasting objects and the bottom plate 22 of the coal seam 2 is 0.5-1 meter. The overall principle is to ensure that the coal seam is convenient to vent after blasting under the condition that blasting objects do not damage the top plate 21 and the bottom plate 22 of the coal seam 2, and reduce the loss of the coal mining quantity of the gasified coal mining coal seam.
Step two, detonating the explosive or liquid carbon dioxide device by using a detonating device; the fire area can be led to the bottom of the vertical well body 1 through a technological means, along with the gradual rise of the bottom temperature of the vertical well body 1, when the temperature rises to 300 ℃ or above, the explosive or liquid carbon dioxide device arranged on the open clamp body 32 can be blasted, the blasting can damage the sleeve pipe of the part, provided with the blasting object, of the sleeve pipe section of the coal seam, well cement and the surrounding coal seam, so that the vertical well body 1 can form a large cavity at the bottom of the vertical well body more easily, and conditions are created for next gas outlet.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A vertical well, comprising a vertical well body (1), characterized in that,
a sleeve (4) is arranged in the vertical well body (1);
the casing (4) comprises a coal seam casing section (41) corresponding to the coal seam (2),
and a blasting assembly (3) is arranged in a preset height interval of the coal seam casing pipe section (41).
2. A vertical well according to claim 1, wherein the blasting assembly (3) comprises a blast and a blast mounting means provided on the casing section (41) of the coal seam;
the blasting matter is spaced from the roof (21) of the coal seam (2) by a first predetermined distance;
the blast is spaced a second predetermined distance from a floor (22) of the coal seam (2).
3. A vertical well according to claim 2, wherein the explosives mounting means comprises a containment jacket (31);
the blasting substance is arranged in the closed jacket (31).
4. A vertical well according to claim 2, wherein the explosives mounting means comprises an open clamp (32);
the blasting substance is arranged on the open clamp body (32); wherein,
the blasting object is provided with a waterproof layer.
5. A vertical well according to any one of claims 2 to 4, wherein the first predetermined distance is from 0.5 to 1 metre; and/or the presence of a gas in the gas,
the second predetermined distance is between 0.5 and 1 meter.
6. The vertical well according to claim 5, wherein the blasting agent is a device that blasts at a predetermined temperature.
7. The vertical well according to claim 6, wherein the explosives are explosives or liquid carbon dioxide devices.
8. The vertical well according to claim 7, further comprising a detonating device for detonating the explosive charge.
9. The vertical well according to claim 8 wherein the detonating device is a device for raising the temperature of the explosives or the liquid carbon dioxide device to a predetermined burst value.
10. A vertical well according to claim 4, wherein the open clamp (32) is an L-shaped clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520087192.4U CN204457719U (en) | 2015-02-06 | 2015-02-06 | A kind of peupendicular hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520087192.4U CN204457719U (en) | 2015-02-06 | 2015-02-06 | A kind of peupendicular hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457719U true CN204457719U (en) | 2015-07-08 |
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ID=53664621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520087192.4U Active CN204457719U (en) | 2015-02-06 | 2015-02-06 | A kind of peupendicular hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457719U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907139A (en) * | 2017-01-20 | 2017-06-30 | 徐斌 | The method that demolition set, blasting system and underground gasification coal seam loosen in advance |
-
2015
- 2015-02-06 CN CN201520087192.4U patent/CN204457719U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907139A (en) * | 2017-01-20 | 2017-06-30 | 徐斌 | The method that demolition set, blasting system and underground gasification coal seam loosen in advance |
| CN106907139B (en) * | 2017-01-20 | 2023-09-08 | 徐斌 | Blasting device, blasting system and underground gasified coal seam pre-loosening method |
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| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170213 Address after: 065001 Hebei economic and Technological Development Zone, Langfang science and Technology Park in the Southern District of B building, room 522 Patentee after: ENN SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: The 065001 Hebei economic and Technological Development Zone of Langfang Huaxiang Xinyuan host new Austrian Science and Technology Park in Southern District Patentee before: ENN Coal Gasification Co., Ltd. |