CN104088617B - A kind of underground coal gasification(UCG) inlet, outlet pore structure - Google Patents
A kind of underground coal gasification(UCG) inlet, outlet pore structure Download PDFInfo
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- CN104088617B CN104088617B CN201410288536.8A CN201410288536A CN104088617B CN 104088617 B CN104088617 B CN 104088617B CN 201410288536 A CN201410288536 A CN 201410288536A CN 104088617 B CN104088617 B CN 104088617B
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Abstract
The open a kind of underground coal gasification(UCG) inlet, outlet pore structure of the present invention, relates to coal underground gasification technology field, and for avoiding the water in water-bearing layer to enter in stove, impact is normally gasified or causes gasification furnace flame-out and invent.Described underground coal gasification(UCG) inlet, outlet pore structure includes the installing hole being opened in ground and connecting with coal seam to be gasified, described installing hole includes upper sleeve pipe installing hole and the setting of casing installing hole communicated with each other, described upper sleeve pipe installing hole is arranged through water-bearing layer, it is fixedly connected with sleeve pipe in described upper sleeve pipe installing hole, setting of casing freely it is equipped with in described setting of casing installing hole, described setting of casing upper end fits through to be located in described upper sleeve pipe, and described setting of casing can along described upper internal surface of sleeve pipe slidably.Underground coal gasification(UCG) inlet, outlet pore structure of the present invention is used for underground coal gasification(UCG).
Description
Technical field
The present invention relates to coal underground gasification technology field, particularly relate to a kind of underground coal gasification(UCG) inlet, outlet pore structure.
Background technology
In coal underground gasification technology, minimum entity organic matter gasification unit is by air inlet, venthole and gasification tunnel composition, gasifying agent is transported in organic matter by air inlet, organic with high temperature aoxidizes, the reaction such as reduction and pyrolysis, the coal gas produced is derived ground 03 through gasification tunnel 01 by venthole 02 and is further utilized, along with gasifying agent and organic reaction, the cavity that air inlet 04 end is formed can be increasing, the temperature of venthole 02 can be more and more higher, the overall structure of coal underground gasification technology is as shown in Figure 1, 01 is gasification tunnel, 02 is venthole, 03 is ground, 04 is air inlet, arrow in figure represents coal gas stream.
In order to ensure hole bottom inbreak or temperature rise occur casing expandable stretch water-bearing layer, upper back water not with gasification coal seam conducting, prior art is borehole casing outer wall with around rock stratum shut by cementing concrete, as shown in Figure 2, wherein 05 is sleeve pipe, 06 is water-bearing layer, 07 is gasification coal seam, and 08 is cementing concrete, and 09 is rock stratum.
In the case of the boring of prior art does not occur straggly on stratum, or borehole casing does not has big variations in temperature not cause sleeve pipe 05 flexible, it is ensured that the water in water-bearing layer, top 06 will not import in gasification coal seam 07.But when stratum generation is straggly or sleeve pipe 05 stretches, often make cementing concrete 08 loosen, the even sleeve pipe 05 that comes off is pulled off, and the position broken down is in water-bearing layer 06 or water-bearing layer less than 06.The artesian water that so may result in water-bearing layer 06 imports gasification coal seam 07 by fracture through sleeve pipe, or cause the artesian water in water-bearing layer 06 to import in stove by the cementing concrete layer after destroying, the temperature causing gasification furnace declines, the coal gas of high heating value will not be produced, gasification furnace can be caused time serious to stop working, be forced to interrupt gasification.
Summary of the invention
Embodiments of the invention provide a kind of underground coal gasification(UCG) inlet, outlet pore structure, and the water in water-bearing layer can be avoided to enter in stove, and impact is normally gasified or causes gasification furnace to stop working.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
A kind of underground coal gasification(UCG) inlet, outlet pore structure, including being opened in ground and the installing hole connected with coal seam to be gasified, described installing hole includes upper sleeve pipe installing hole and the setting of casing installing hole communicated with each other, described upper sleeve pipe installing hole is arranged through water-bearing layer, it is fixedly connected with sleeve pipe in described upper sleeve pipe installing hole, freely being equipped with setting of casing in described setting of casing installing hole, described setting of casing upper end fits through to be located in described upper sleeve pipe, and described setting of casing can along described upper internal surface of sleeve pipe slidably.
Further, described upper sleeve pipe is connected with described upper sleeve pipe installing hole by cementing concrete ring.
Further, the lower surface of described upper sleeve pipe is positioned at below the water-bearing layer that distance coal seam to be gasified is nearest.
Further, the lower surface of described upper sleeve pipe and the distance in described water-bearing layer are more than 5 meters.
Further, the distance of the lower surface of described upper sleeve pipe and coal seam to be gasified end face is more than treating 5 times of gasification of coal layer thickness.
Further, the lower end of described upper sleeve pipe is provided with the first locating part, corresponding described first locating part in described cased upper end is provided with the second locating part, described first locating part and described second locating part and described cased upper end can be stoped to depart from the lower end of described upper sleeve pipe.
Further, described first locating part is the snap ring being arranged on the lower end inner wall of described upper sleeve pipe, and described second locating part is to be arranged at the snap ring on the outer wall of described cased upper end or stepped boss ring.
Further, described first locating part is the lower end inner wall card ring segment of a week being evenly arranged in described upper sleeve pipe, and described second locating part is the snap ring being arranged on the outer wall of described cased upper end；
Or described first locating part is the snap ring being arranged on the lower end inner wall of described upper sleeve pipe, described second locating part is to be evenly arranged in the described cased upper end outer wall card ring segment of a week.
Further, described first locating part is the stepped boss ring being arranged on the lower end inner wall of described upper sleeve pipe, and described second locating part is to be arranged at the snap ring on the outer wall of described cased upper end or stepped boss ring.
Further, the confined planes of described snap ring is inclined-plane.The underground coal gasification(UCG) that the embodiment of the present invention provides is entered, air outlet hole structure, upper sleeve pipe installing hole is arranged through water-bearing layer, owing to being fixedly connected with upper sleeve pipe in upper sleeve pipe installing hole, setting of casing freely it is equipped with in setting of casing installing hole, setting of casing can at upper internal surface of sleeve pipe slidably in the case of expanding with heat and contract with cold, setting of casing is reduced by the influence of stratum inbreak, the influence that upper sleeve pipe produces external force also reduces, when avoiding roof generation inbreak, sleeve pipe is broken in the stratum changing of the relative positions, the water in water-bearing layer imports in stove through the fracture of sleeve pipe, ensure that boring normally passes in and out gas, and then ensure that being normally carried out of Underground Coal Gasification Process.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the overall schematic of prior art underground coal gasification(UCG) structure；
Fig. 2 is the schematic diagram of prior art hole structure；
Fig. 3 is the overall structure schematic diagram of embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure；
Fig. 4 is the structural representation that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, the first locating part and the second locating part use snap ring；
Fig. 5 is the schematic diagram of the confined planes employing ramp structure of the snap ring of the first locating part and the second locating part in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure；
Fig. 6 is the structural representation that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, the first locating part uses card ring segment；
Fig. 7 is the structural representation that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, the second locating part uses card ring segment；
Fig. 8 is that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, upper its lower end uses the confined planes of ramp structure, setting of casing upper end to use the structural representation of card ring segment；
Fig. 9 is the schematic diagram of the confined planes that upper its lower end uses snap ring segment structure, setting of casing upper end employing ramp structure in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure；
Figure 10 is the structural representation that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, the first locating part and the second locating part all use stepped boss ring；
Figure 11 is the structural representation that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, the first locating part uses that stepped boss ring, the second locating part use confined planes to be ramp structure snap ring；
Figure 12 is that in embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure, the first locating part uses confined planes to be ramp structure snap ring, the structural representation of the second locating part stepped boss ring of employing.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiment of the present invention underground coal gasification(UCG) inlet, outlet pore structure is described in detail.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Term " first ", " second " are only used for describing purpose, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more this feature.In describing the invention, except as otherwise noted, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
Fig. 3 is that embodiment of the present invention underground coal gasification(UCG) is entered, one specific embodiment of air outlet hole structure, the present embodiment underground coal gasification(UCG) is entered, air outlet hole structure, including being opened in ground and the installing hole connected with coal seam to be gasified, installing hole includes upper sleeve pipe installing hole and the setting of casing installing hole communicated with each other, upper sleeve pipe installing hole be from ground through water-bearing layer to water-bearing layer below hole rock stratum, setting of casing installing hole be below water-bearing layer rock stratum to the hole coal seam to be gasified, it is fixedly connected with sleeve pipe 1 in upper sleeve pipe installing hole, setting of casing 2 freely it is equipped with in setting of casing installing hole, setting of casing 2 upper end fits through to be located in sleeve pipe 1, and setting of casing 2 can along upper sleeve pipe 1 inwall slidably.
The underground coal gasification(UCG) that embodiments of the invention provide is entered, air outlet hole structure, upper sleeve pipe installing hole is arranged through water-bearing layer, owing to being fixedly connected with upper sleeve pipe 1 in upper sleeve pipe installing hole, setting of casing 2 freely it is equipped with in setting of casing installing hole, setting of casing 2 can at upper sleeve pipe 1 inwall slidably in the case of expanding with heat and contract with cold, setting of casing 2 is reduced by the influence of stratum inbreak, the influence that upper sleeve pipe 1 is produced external force also reduces, when avoiding roof generation inbreak, sleeve pipe is broken in the stratum changing of the relative positions, the water in water-bearing layer imports in stove through the fracture of sleeve pipe, ensure that boring normally passes in and out gas, and then ensure that being normally carried out of Underground Coal Gasification Process.
For guaranteeing being normally carried out of gasification, as it is shown on figure 3, upper sleeve pipe 1 is connected with upper sleeve pipe 1 installing hole by cementing concrete ring 5.The cementing concrete ring 5 formed after cementing concrete solidification can be used to fixing upper sleeve pipe 1 and surrounding rock stratum 31, ensure that water-bearing layer 4 is by fixing dead, the water avoiding water-bearing layer 4 enters in stove, and stop inlet, outlet pore structure normally passes in and out gas, affects being normally carried out of Underground Coal Gasification Process.And setting of casing 2 and surrounding rock stratum 32 are provided without cementing concrete ring 5 and fix, shrinkage stress only by rock stratum 32 is fixed automatically, thus make setting of casing 2 less with the adhesive force of surrounding rock stratum 32, when being expanded with heat and contract with cold or stratum inbreak stretches, relatively low to the destructive power of setting of casing 2.
For guaranteeing that under Different Strata structure, Underground Coal Gasification Process is all normally carried out, need to consider that the Position Design of upper sleeve pipe 1, the Position Design of upper sleeve pipe 1 have relation with the distance in water-bearing layer 4, the lower surface of upper sleeve pipe 1 with the distance of coal seam 6 to be gasified end face and the thickness in coal seam to be gasified 6 with the lower surface of upper sleeve pipe 1.As shown in Figure 3, owing to being the position being easiest to water guide at lower end and the rock stratum 31 about of upper sleeve pipe 1, also it is the weakest part of upper sleeve pipe installing hole, can be by water-bearing layer less than 4 nearest in distance coal seam to be gasified 6 for the lower surface design of upper sleeve pipe 1, and the upper lower surface of sleeve pipe 1 is designed as more than 5 meters with the distance in water-bearing layer 4, and upper sleeve pipe 1 is all connected with upper sleeve pipe installing hole by cementing concrete ring 5, can ensure that water-bearing layer 4 is fixed dead, the water reducing nearest water-bearing layer 4, distance coal seam to be gasified 6 enters the probability in coal seam 6 to be gasified；Owing to the stratum between water-bearing layer 4 and coal seam to be gasified 6 is the thinnest, carrying out along with coal seam 6 to be gasified gasification, this stratum loses support, there is inbreak, produced crustal stress can be to upper, setting of casing damages, thus break sleeve pipe, the water making water-bearing layer 4 enters in stove, therefore, need to consider larger with the design of the distance of coal seam 6 to be gasified end face for the lower surface of upper sleeve pipe 1, facts have proved, the lower surface of upper sleeve pipe 1 is designed as more than during wait 5 times of coal seam 6 thickness that gasifies with the distance wait coal seam 6 end face that gasifies, can avoid the stratum between water-bearing layer 4 and coal seam to be gasified 6 that inbreak occurs, guarantee being normally carried out of coal seam 6 gasification to be gasified.
As described in above-described embodiment, the distance of the lower surface of upper sleeve pipe 1 Yu water-bearing layer 4 can be designed as 6 meters, and upper sleeve pipe 1 is all connected with upper sleeve pipe installing hole by cementing concrete ring 5, can ensure that water-bearing layer 4 is fixed dead, the water reducing nearest water-bearing layer 4, distance coal seam to be gasified 6 enters the probability in coal seam 6 to be gasified；When the thickness in coal seam 6 of gasifying is 7 meters, the distance of the lower surface of upper sleeve pipe 1 with coal seam 6 to be gasified end face can be designed as 42 meters, so that the distance of the lower surface of upper sleeve pipe 1 and coal seam 6 to be gasified end face is more than 5 times of coal seam 6 to be gasified thickness, can avoid the stratum between water-bearing layer 4 and coal seam to be gasified 6 that inbreak occurs, it is ensured that being normally carried out of coal seam 6 gasification to be gasified.
Concrete, the distance of the lower surface of upper sleeve pipe 1 Yu water-bearing layer 4 can also be designed as 10 meters, and upper sleeve pipe 1 is all connected with upper sleeve pipe installing hole by cementing concrete ring 5, can ensure that water-bearing layer 4 is fixed dead, the water reducing nearest water-bearing layer 4, distance coal seam to be gasified 6 enters the probability in coal seam 6 to be gasified；When the thickness in coal seam 6 of gasifying is 6 meters, the distance of the lower surface of upper sleeve pipe 1 with coal seam 6 to be gasified end face can be designed as 40 meters, so that the distance of the lower surface of upper sleeve pipe 1 and coal seam 6 to be gasified end face is more than 5 times of coal seam 6 to be gasified thickness, can avoid the stratum between water-bearing layer 4 and coal seam to be gasified 6 that inbreak occurs, it is ensured that being normally carried out of coal seam 6 gasification to be gasified.
Owing to setting of casing 2 can freely stretch under reservoir stress effect in upper sleeve pipe 1, setting of casing 2 freely can stretch in rock stratum 32 about simultaneously, as shown in Figure 3, the lower end of upper end with upper sleeve pipe 1 for stoping setting of casing 2 departs from, it is provided with the first locating part 11 in the lower end of upper sleeve pipe 1, corresponding first locating part 11 in the upper end of setting of casing 2 is provided with the second locating part 21, first locating part 11 and the second locating part 21 can be by upper, setting of casing hangs and connects, and then on stoping, setting of casing departs from, play the effect spacing to setting of casing 2, ensure that setting of casing 2 will not be fallen in stove, guarantee being normally carried out of coal seam 6 gasification to be gasified.
Concrete, as shown in Figure 4, the first locating part 11 can be designed as the snap ring being arranged on the lower end inner wall of upper sleeve pipe 1, the second locating part 21 is designed as the snap ring being arranged on the upper end outer wall of setting of casing 2, upper and lower sleeve pipe can be hung and connect by this Snap ring structure, and then stop upper and lower sleeve pipe to depart from, play the effect spacing to setting of casing 2, to prevent setting of casing 2 from falling in stove, affect being normally carried out of coal seam 6 gasification to be gasified, meanwhile, snap ring processing is simple, it is easy to accomplish.
In the above-described embodiments, as shown in Figure 5, the confined planes 211 of the confined planes 111 of the first locating part 11 snap ring and the second locating part 21 snap ring can be both designed as inclined-plane, ramp structure is so that the confined planes 111 of the first locating part 11 is milder with contacting of the confined planes 211 of the second locating part 21, the work progress that can avoid drilling well neutralizes the problem of easy clamping stagnation during transferring sleeve pipe and occurs, construction quality and progress can be improved, ramp structure may insure that sleeve pipe 1 can transfer to precalculated position simultaneously, on so that, setting of casing preferably hangs connection, in prevention, setting of casing departs from, guarantee being normally carried out of coal seam 6 gasification to be gasified.
As shown in Figure 6 and Figure 7, the first locating part 11 can be designed as being evenly arranged in the lower end inner wall card ring segment of a week of upper sleeve pipe 1, card ring segment can be to use n uniform form, and the second locating part 21 is the snap ring being arranged on the upper end outer wall of setting of casing 2；Or the first locating part 11 is designed as the snap ring being arranged on the lower end inner wall of upper sleeve pipe 1, the second locating part 21 is designed as being evenly arranged in the upper end outer wall card ring segment of a week of setting of casing 2, and card ring segment can be to use n uniform form.Use card ring segment can save material, reduce the engineering time, improve efficiency of construction.
As described in above-described embodiment, as shown in Figure 8 and Figure 9, can be by the confined planes beveling of the snap ring relative with card ring segment, thus, it is possible to make to be contacted from face between snap ring with confined planes to become linear contact lay, it is simple to wriggling upwards during setting of casing 2 expanded by heating, reduce the suction of contact surface, make upper and lower sleeve pipe preferably hang connection, prevent upper and lower sleeve pipe from departing from, it is ensured that being normally carried out of coal seam 6 gasification to be gasified.
As shown in Figure 10; first locating part 11 can be made the stepped boss ring on the lower end inner wall being arranged at upper sleeve pipe 1; second locating part 21 is the stepped boss ring being arranged on the upper end outer wall of setting of casing 2; boss ring structure can increase the suspension bonding strength of upper and lower sleeve pipe; it is more beneficial for protecting setting of casing 2 not disengaged with upper sleeve pipe 1 by under action of gravity, the location of setting of casing 2 is served protective effect.
As shown in figure 11, first locating part 11 can also be made the stepped boss ring on the lower end inner wall being arranged at upper sleeve pipe 1, second locating part 21 makes the snap ring on the upper end outer wall being arranged at setting of casing 2, and second the confined planes 211 of locating part 21 snap ring be inclined-plane, so that the confined planes 211 of boss ring and the second locating part 21 snap ring is become linear contact lay from face contact, it is easy to the wriggling upwards when setting of casing 2 expanded by heating, reduce the suction of contact surface, make, setting of casing preferably hangs connection, stop the upper end of setting of casing 2 to depart from the lower end of upper sleeve pipe 1 simultaneously, guarantee being normally carried out of coal seam 6 gasification to be gasified.
As shown in figure 12, first locating part 11 is designed as the snap ring being arranged on the lower end inner wall of upper sleeve pipe 1, and first the confined planes 111 of locating part 11 snap ring be inclined-plane, second locating part 21 is the stepped boss ring being arranged on the upper end outer wall of setting of casing 2, so that the confined planes 111 of boss ring and the first locating part 11 snap ring is become linear contact lay from face contact, it is easy to the wriggling upwards when setting of casing 2 expanded by heating, reduce the suction of contact surface, make, setting of casing preferably hangs connection, stop the upper end of setting of casing 2 to depart from the lower end of upper sleeve pipe 1 simultaneously, guarantee being normally carried out of coal seam 6 gasification to be gasified.
In the description of this specification, specific features, structure, material or feature can combine in any one or more embodiments or example in an appropriate manner.
The above; being only the detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (10)
1. a underground coal gasification(UCG) inlet, outlet pore structure, it is characterized in that, including being opened in ground and the installing hole connected with coal seam to be gasified, described installing hole includes upper sleeve pipe installing hole and the setting of casing installing hole communicated with each other, described upper sleeve pipe installing hole is arranged through the water-bearing layer on top, coal seam to be gasified, it is fixedly connected with sleeve pipe in described upper sleeve pipe installing hole, setting of casing freely it is equipped with in described setting of casing installing hole, described setting of casing upper end fits through to be located in described upper sleeve pipe, and described setting of casing can along described upper internal surface of sleeve pipe slidably.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 1, it is characterised in that described upper sleeve pipe is connected with described upper sleeve pipe installing hole by cementing concrete ring.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 1, it is characterised in that the lower surface of described upper sleeve pipe is positioned at below the water-bearing layer that distance coal seam to be gasified is nearest.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 3, it is characterised in that the distance in the water-bearing layer that the lower surface coal seam to be gasified with described distance of described upper sleeve pipe is nearest is more than 5 meters.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 1, it is characterised in that the distance of the lower surface of described upper sleeve pipe and coal seam to be gasified end face is more than treating 5 times of gasification of coal layer thickness.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 1, it is characterized in that, the lower end of described upper sleeve pipe is provided with the first locating part, corresponding described first locating part in described cased upper end is provided with the second locating part, described first locating part and described second locating part and described cased upper end can be stoped to depart from the lower end of described upper sleeve pipe.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 6, it is characterized in that, described first locating part is the snap ring being arranged on the lower end inner wall of described upper sleeve pipe, and described second locating part is to be arranged at the snap ring on the outer wall of described cased upper end or stepped boss ring.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 6, it is characterized in that, described first locating part is the lower end inner wall card ring segment of a week being evenly arranged in described upper sleeve pipe, and described second locating part is the snap ring being arranged on the outer wall of described cased upper end；
Or described first locating part is the snap ring being arranged on the lower end inner wall of described upper sleeve pipe, described second locating part is to be evenly arranged in the described cased upper end outer wall card ring segment of a week.
Underground coal gasification(UCG) inlet, outlet pore structure the most according to claim 6, it is characterized in that, described first locating part is the stepped boss ring being arranged on the lower end inner wall of described upper sleeve pipe, and described second locating part is to be arranged at the snap ring on the outer wall of described cased upper end or stepped boss ring.
10. according to the underground coal gasification(UCG) inlet, outlet pore structure described in any one of claim 7～9, it is characterised in that the confined planes of described snap ring is inclined-plane.
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| CN104131780B (en) * | 2014-06-26 | 2016-08-24 | 新奥气化采煤有限公司 | Prevent the method for leakage water, well construction |
| CN104747159B (en) * | 2015-02-03 | 2018-05-25 | 新奥科技发展有限公司 | Well construction water leak-proof method and casing |
| CN104763336B (en) * | 2015-02-06 | 2018-07-06 | 新奥科技发展有限公司 | A kind of well construction and underground gasification furnace |
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| CN201144684Y (en) * | 2007-09-07 | 2008-11-05 | 新奥能源研究院有限公司 | Underground gasification furnace air outlet pipe thermal expansion cold contraction and anti-leakage device |
| WO2009157811A1 (en) * | 2008-06-26 | 2009-12-30 | Открытое Акционерное Общество "Газпром Промгаз" | Coal gasification method (variants) and a subsurface water purification method |
| CN102287177A (en) * | 2011-08-19 | 2011-12-21 | 秦勇 | Method for gasifying underground coal |
| CN102434142B (en) * | 2011-11-30 | 2014-12-03 | 中国神华能源股份有限公司 | Coal underground gasification method |
| CN103742122B (en) * | 2014-01-28 | 2017-09-19 | 新奥科技发展有限公司 | Underground coal gasification system and gasification process |
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