CN205117306U - Natural gas acquisition device - Google Patents
Natural gas acquisition device Download PDFInfo
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- CN205117306U CN205117306U CN201520892351.8U CN201520892351U CN205117306U CN 205117306 U CN205117306 U CN 205117306U CN 201520892351 U CN201520892351 U CN 201520892351U CN 205117306 U CN205117306 U CN 205117306U
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- sleeve pipe
- heat pipe
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- assisted heat
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Abstract
The utility model discloses a natural gas acquisition device, include: the sleeve pipe, sleeve pipe radiating segment outer wall and sleeve pipe receive all to be equipped with on the hot arc outer wall perforation, gravity heat pipe, gravity heat pipe upper portion set up in in the sleeve pipe radiating segment, the gravity heat pipe lower part sets up in the sleeve pipe receives the hot arc. Lower part caloric receptivity through gravity heat pipe to give gravity heat pipe with absorptive heat transfer, after gravity heat pipe upper portion is heated, can heat gas hydrate, make its decompose and produce methane gas and aqueous water. Increase along with what the hot gas hydrate in sky decomposed for gas hydrate stores up the reinforcing of intraformational pressure, after pressure is increased to certain degree, can automatic spout sleeve pipe top, this development that has just realized gas hydrate.
Description
Technical field
The utility model relates to natural gas and gathers technical field, particularly relates to a kind of natural gas acquisition device.
Background technology
Gas hydrates are distributed widely in halmeic deposit, and it is a kind of class ice-like crystalline material formed under high pressure, cryogenic conditions by natural gas and water.In gas hydrates, methane content accounts for 80% ~ 99.9%, and its Air-pollution From Combustion is more much smaller than fossil fuels such as coal, oil, natural gases, and reserves are very abundant, are considered as following most promising petroleum gas alternative energy source by various countries.Therefore, development of natural gas hydrate resource is of great significance for alleviation China energy crisis, guarantee energy reserves, the aspect tools such as pollution that control environment cost-effectively.The exploitation of gas hydrates mainly contains pyrolysismethod, voltage drop method and chemical-agent technique, wherein pyrolysismethod be by, gas hydrates layer is heated, make the temperature of gas hydrates layer exceed its equilibrium temperature, thus impel gas hydrate dissociation to be the development approach of water and natural gas.But the method needs additionally to provide a large amount of heats, economically reduce the feasibility of gas hydrates exploitation.
A large amount of geophysical exploration shows, due to the activity of geothermal gradient or depths, stratum magma, generally grows the stratum that high temperature, high pressure water layer or hot dry rock equitemperature are higher in the bottom of gas hydrates reservoir.Effectively utilize the origin of heat of bottom hot dry rock as pyrolysismethod gas hydrates, reduction development cost, elimination external contamination risk, raising whole development benefit are all had great importance.
Utility model content
In view of this, the utility model provides a kind of natural gas acquisition device, utilizes outside heat to carry out heating gas hydrates layer, thus realizes the exploitation to natural gas.The utility model additionally provides a kind of natural gas acquisition methods, utilizes the bottom of the heat zone bottom gas hydrates reservoir to gravity assisted heat pipe to heat, and significantly reduces development cost and eliminates potential external contamination risk.
For solving the problems of the technologies described above, the utility model provides a kind of natural gas acquisition device, comprising:
Sleeve pipe, described sleeve pipe comprises sleeve pipe radiating segment and is arranged at the sleeve pipe heating section bottom described sleeve pipe radiating segment, and described sleeve pipe radiating segment outer wall and sleeve pipe heating section outer wall are equipped with perforation;
Gravity assisted heat pipe, described gravity assisted heat pipe top is arranged in described sleeve pipe radiating segment, and described gravity assisted heat pipe bottom is arranged in sleeve pipe heating section.
Preferably, described gravity assisted heat pipe comprises the annular seal space arranged in it and the phase change medium be arranged in described annular seal space.
Preferably, the quantity of described gravity assisted heat pipe is multiple, and multiple described gravity assisted heat pipe is end to end by connector successively.
Preferably, also comprise packer, described packer comprises the first packer accessory be arranged at bottom described sleeve pipe radiating segment and the second packer accessory being arranged at described sleeve pipe heating section top.
Preferably, also comprise draw bar, described draw bar is affixed to be arranged at described gravity assisted heat pipe top and to extend and be connected to described cannula tip and be connected with described jacket exterior.
Natural gas acquisition device provided by the utility model, be provided with sleeve pipe and gravity assisted heat pipe, described sleeve pipe comprises sleeve pipe radiating segment and is arranged at the sleeve pipe heating section bottom described sleeve pipe radiating segment, and described sleeve pipe radiating segment outer wall and sleeve pipe heating section outer wall are equipped with perforation; Described gravity assisted heat pipe top is arranged in described sleeve pipe radiating segment, and described gravity assisted heat pipe bottom is arranged in sleeve pipe heating section.In the course of the work, the lower absorbent of gravity assisted heat pipe enters into the heat in sleeve pipe heating section by perforation, and the heat of absorption is passed to gravity assisted heat pipe top place, after gravity assisted heat pipe top is heated, can by by perforation, the gas hydrates entered in sleeve pipe radiating segment heat, make it decompose and produce methane gas and aqueous water, along with increasing of sky hot gas decomposition of hydrate, the gas-liquid mixture obtained also increases gradually, pressure in gas hydrates reservoir is strengthened, after pressure is increased to certain degree, automatically cannula tip can be sprayed onto, which achieves the exploitation of gas hydrates.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment, simple introduction is done below by the accompanying drawing used required in embodiment, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is natural gas acquisition device structural representation provided by the utility model;
Fig. 2 is gravity assisted heat pipe structural representation in natural gas acquisition device provided by the utility model.
In accompanying drawing, 1 is sleeve pipe, and 11 is perforation, and 2 is gravity assisted heat pipe, and 21 is annular seal space, and 22 is phase change medium, and 23 is connector, 31 first packer accessories, 32 second packer accessories, and 4 is draw bar, and 5 is gas hydrates reservoir, and 6 is heat zone.
L1 is the flow direction of the heat of heat radiation, and L2 is the heat flow direction absorbed, and L3 is the direction of motion of phase change medium 22.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making under creative work prerequisite, and the every other embodiment obtained, all belongs to the utility model protection domain.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to accompanying drawing 1 and accompanying drawing 2, Fig. 1 is natural gas acquisition device structural representation provided by the utility model; Fig. 2 is gravity assisted heat pipe structural representation in natural gas acquisition device provided by the utility model.
The utility model provides a kind of natural gas acquisition device, comprising:
Sleeve pipe 1, described sleeve pipe 1 comprises sleeve pipe radiating segment and is arranged at the sleeve pipe heating section bottom described sleeve pipe radiating segment, and described sleeve pipe radiating segment outer wall and sleeve pipe heating section outer wall are equipped with perforation 11;
Gravity assisted heat pipe 2, described gravity assisted heat pipe 2 top is arranged in described sleeve pipe radiating segment, and described gravity assisted heat pipe 2 bottom is arranged in sleeve pipe heating section.
Wherein, as shown in Figure 1, preferably perforation 11 is set to perforation 11 well, cavity can be formed in sleeve pipe 1.
In the present embodiment, to be entered into the heat in sleeve pipe heating section by perforation 11 by the lower absorbent of gravity assisted heat pipe 2, and the heat of absorption is passed to gravity assisted heat pipe 2 top place, after gravity assisted heat pipe 2 top is heated, the gas hydrates entered in sleeve pipe radiating segment by perforation 11 can be heated, make it decompose and produce methane gas and aqueous water, along with increasing of sky hot gas decomposition of hydrate, the gas-liquid mixture obtained also increases gradually, pressure in gas hydrates reservoir 5 is strengthened, after pressure is increased to certain degree, automatically sleeve pipe 1 top can be sprayed onto, which achieves the exploitation of gas hydrates.
In order to optimize above-described embodiment further, described gravity assisted heat pipe 2 comprises the annular seal space 21 arranged in it and the phase change medium 22 be arranged in annular seal space 21.In order to effectively heat bottom gravity assisted heat pipe 2 be conducted to top, in the present embodiment, preferred employing heat conduction with phase change, by adding phase change medium 22 in annular seal space 21, phase change medium 22 is heated in the bottom of gravity assisted heat pipe 2 and can be converted into steam rising, when behind arrival gravity assisted heat pipe 2 top, because of the change of temperature, again be converted into liquid, the bottom of gravity assisted heat pipe 2 is again back to by annular seal space 21 body inwall, so just make to which form heat conducting circulation, also further avoid the loss of heat in conductive process, and this structure is simple, and also mustn't want providing of external force, effectively improve its operating efficiency.Wherein, phase change medium 22 can be diversified, as water, formaldehyde, acetone and freon, all can realize the function of phase-change heat transfer.Suitable phase change medium 22 can be selected particularly according to the actual temp of gas hydrates reservoir 5 and heat zone 6 Distance geometry heat zone 6 in the vertical.
Further again, the quantity of described gravity assisted heat pipe 2 is multiple, and multiple described gravity assisted heat pipe 2 is end to end by connector 23 successively.Those skilled in the art are known, sleeve pipe 1 more up its temperature is lower, therefore when running into the distance between sleeve pipe heating section and sleeve pipe radiating segment and being long, in order to ensure maximum heat transfer efficiency, multiple gravity assisted heat pipe 2 can be set, and by connector 23 it be joined end to end successively and connect.Because each described gravity assisted heat pipe 2 is mutually independent, an independent heat transfer unit can be formed respectively, heat is upwards transmitted successively from bottom, doing so avoids heat and run off in transmittance process.Should explanatorily, the material of connection end, need adopt the material with stronger heat transmission function to make, to guarantee the efficiency of each gravity assisted heat pipe 2 when heat conduction.
Wherein, also it should be noted that the quantity of gravity assisted heat pipe 2, length and built-in working media, the efficiency of the condition that the distance of foundation sleeve pipe radiating segment distance sleeve pipe heating section, transport are constructed and from bottom to top heat trnasfer is determined.
In the utility model one specific embodiment, also comprise packer, described packer comprises the first packer accessory 31 be arranged at bottom described sleeve pipe radiating segment and the second packer accessory 32 being arranged at described sleeve pipe heating section top.Packer can effectively prevent by parts casing pipe 1 under the gas of gas hydrates reservoir 5 output, liquid mixture inflow radiating tube, and the situation causing gravity assisted heat pipe 2 heat conduction efficiency to reduce occurs.This also further increases gravity assisted heat pipe 2 conduction efficiency.In the course of the work, in order to strengthen the lifting of conduction efficiency further, by the cooperation between the first packer accessory 31 and the second packer accessory 32, it is made to form heat transfer chamber, as shown in Figure 1; In heat transfer chamber, the gravity heat-transfer pipe that the gravity assisted heat pipe 2 being arranged at bottommost can be connected with Yu Qixiang is separated, gravity assisted heat pipe 2 because of bottommost is arranged in sleeve pipe heating section, therefore the operating efficiency of this gravity assisted heat pipe 2 is the highest, this gravity assisted heat pipe 2 by heat conduction as in heat transfer chamber, then can pass to other gravity assisted heat pipe 2 by heat transfer chamber.This temperature difference that just largely avoided two gravity assisted heat pipes 2 is little, and the situation causing heat transfer efficiency low occurs.Wherein, should explanatorily, in order to avoid the temperature leak in heat transfer chamber, heat transfer chamber should carry out insulation.
Certainly, the first packer accessory 31 and the second packer accessory 32 can also play the fixing effect of being hung by gravity assisted heat pipe 2, to ensure the separation of gravity assisted heat pipe 2 in heat transfer chamber.
In the utility model one specific embodiment, also comprise draw bar 4, described draw bar 4 is affixed to be arranged at described gravity assisted heat pipe 2 top and to extend and be connected to described sleeve pipe 1 top and described sleeve pipe 1 outside, when there is situation about damaging in the first packer accessory 31 and the second packer accessory 32, hold gravity assisted heat pipe 2, the situation avoiding gravity assisted heat pipe 2 to drop occurs, certainly, the gravity assisted heat pipe 2 that the gravity assisted heat pipe 2 of bottommost is adjacent need be adopted chain or other mode connect, only otherwise heat occurs directly to be transmitted.
In sum, the natural gas acquisition device that the utility model provides, to be entered into the heat in sleeve pipe heating section by perforation 11 by the lower absorbent of gravity assisted heat pipe 2, be delivered in heat transfer chamber, heat is passed to other gravity assisted heat pipe 2 by transfer chamber again, when heat is delivered to after the gravity assisted heat pipe 2 be arranged in sleeve pipe radiating segment, the gas hydrates entered in sleeve pipe radiating segment by perforation 11 can be heated, make it decompose and produce methane gas and aqueous water, along with increasing of sky hot gas decomposition of hydrate, the gas-liquid mixture obtained also increases gradually, pressure in gas hydrates reservoir 5 is strengthened, after pressure is increased to certain degree, automatically sleeve pipe 1 top can be sprayed onto, which achieves the exploitation of gas hydrates.
The utility model additionally provides a kind of natural gas acquisition methods, is applied to the natural gas acquisition device in technique scheme described in any one, comprises step:
1) enter sleeve pipe under and enter heat zone below gas hydrates reservoir and described gas hydrates reservoir;
2) in described sleeve pipe, gas hydrates Reservoir Section place and high temperature interval place arrange gravity assisted heat pipe;
3) bottom of described gravity assisted heat pipe absorbs the heat in described heat zone, and is passed to the top of the described gravity assisted heat pipe being arranged at described gas hydrates Reservoir Section;
4) by conducting the heat of coming, described gas hydrates reservoir is heated.
Wherein, heat zone can be the higher reservoir of high temperature, high pressure water layer or hot dry rock equitemperature.
A kind of natural gas acquisition methods that the utility model embodiment provides, the heat zone 6 bottom gas hydrates reservoir 5 is utilized to carry out heating the bottom of gravity assisted heat pipe 2, effectively utilize the origin of heat of the heat zone 6 bottom gas hydrates reservoir 5 as pyrolysismethod gas hydrates, this just This effectively reduces development cost and eliminates potential external contamination risk.
In conjunction with the various embodiments described above, its concrete work progress can with reference to following content:
First during drilling well, drill described gas hydrates reservoir 5 and xeothermic rock stratum successively, then under enter sleeve pipe 1 and inject cement to cement the well, carry out perforation 11 at gas hydrates reservoir 5 and hot dry rock interval respectively to arrange, in order to be communicated with sleeve pipe 1 and gas hydrates reservoir 5 reservoir, sleeve pipe enters xeothermic rock stratum 1 time.
In the annular seal space 21 of gravity assisted heat pipe 2, the gravity assisted heat pipe 2 of filling phase change medium 22, two ends sealing is connected with each other by described connector 23, constantly enter down in sleeve pipe 1 simultaneously, when gravity assisted heat pipe 2 length combined equals gas hydrates reservoir 5 to the distance of xeothermic rock stratum, stop connecting gravity assisted heat pipe 2, the described combination gravity assisted heat pipe 2 connected is connected on draw bar 4, one removes in sleeve pipe 1, make described combination gravity assisted heat pipe 2 upper end be positioned at gas hydrates reservoir 5, lower end is positioned at hot dry rock layer.
Under enter two groups of packers in sleeve pipe 1, the first packer accessory 31 is positioned at described gas hydrates reservoir 5 sections of lower ends, and packer accessory is positioned at described hot dry rock interval upper end, makes it form heat transfer chamber, and carries out insulation.
The utility model provide a kind of natural gas acquisition device to adopt principle be:
Because xeothermic rock temperature is higher, heated gravity assisted heat pipe 2 lower end, in gravity assisted heat pipe 2 annular seal space 21, phase change medium 22 absorbs heat, arrow L1 as shown in Figure 2, becomes gaseous state from liquid state, and gaseous state again forms liquid phase after rising to upper end release heat and flows downward along annular seal space 21 inwall gets back to the bottom of annular seal space 21, again to absorb heat, carry out circulating phase-change next time, the top simultaneously heat being upwards delivered to annular seal space 21 exports, arrow L2 as shown in Figure 2; Thereafter, gravity assisted heat pipe 2 realizes heat transmission from bottom to top.So hand on, the heat of hot dry rock layer is delivered in the sleeve pipe 1 of gas hydrates reservoir 5 sections the most at last, and heats gas hydrates, makes it decompose and produces methane gas and aqueous water; Along with increasing of gas hydrate dissociation, the gas obtained, liquid mixture also increase gradually, and the pressure in gas hydrates reservoir 5 is increased, and from the top ports being sprayed onto sleeve pipe 1 after pressure is increased to some values, realize the exploitation of gas hydrates.
Above a kind of natural gas acquisition device provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (5)
1. a natural gas acquisition device, is characterized in that, comprising:
Sleeve pipe (1), described sleeve pipe (1) comprises sleeve pipe radiating segment and is arranged at the sleeve pipe heating section bottom described sleeve pipe radiating segment, and described sleeve pipe radiating segment outer wall and sleeve pipe heating section outer wall are equipped with perforation (11);
Gravity assisted heat pipe (2), described gravity assisted heat pipe (2) top is arranged in described sleeve pipe radiating segment, and described gravity assisted heat pipe (2) bottom is arranged in sleeve pipe heating section.
2. natural gas acquisition device as claimed in claim 1, it is characterized in that, described gravity assisted heat pipe (2) comprises the annular seal space (21) arranged in it and the phase change medium (22) be arranged in described annular seal space (21).
3. natural gas acquisition device as claimed in claim 2, it is characterized in that, the quantity of described gravity assisted heat pipe (2) is multiple, and multiple described gravity assisted heat pipe (2) is end to end by connector (23) successively.
4. natural gas acquisition device as claimed in claim 3, it is characterized in that, also comprise packer, described packer comprises the first packer accessory (31) be arranged at bottom described sleeve pipe radiating segment and the second packer accessory (32) being arranged at described sleeve pipe heating section top.
5. natural gas acquisition device as claimed in claim 4, it is characterized in that, also comprise draw bar (4), described draw bar (4) is affixed to be arranged at described gravity assisted heat pipe (2) top and to extend and be connected to described sleeve pipe (1) top and be connected with described sleeve pipe (1) is outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520892351.8U CN205117306U (en) | 2015-11-10 | 2015-11-10 | Natural gas acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520892351.8U CN205117306U (en) | 2015-11-10 | 2015-11-10 | Natural gas acquisition device |
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| CN205117306U true CN205117306U (en) | 2016-03-30 |
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| CN201520892351.8U Active CN205117306U (en) | 2015-11-10 | 2015-11-10 | Natural gas acquisition device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275436A (en) * | 2015-11-10 | 2016-01-27 | 青岛海洋地质研究所 | Natural gas acquiring device and method |
| CN106884637A (en) * | 2017-03-29 | 2017-06-23 | 中国石油大学(华东) | Shale gas thermal process and system |
-
2015
- 2015-11-10 CN CN201520892351.8U patent/CN205117306U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275436A (en) * | 2015-11-10 | 2016-01-27 | 青岛海洋地质研究所 | Natural gas acquiring device and method |
| CN106884637A (en) * | 2017-03-29 | 2017-06-23 | 中国石油大学(华东) | Shale gas thermal process and system |
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