CN103015959A - Mechanical-thermal hydrate exploiting method - Google Patents
Mechanical-thermal hydrate exploiting method Download PDFInfo
- Publication number
- CN103015959A CN103015959A CN2012104994106A CN201210499410A CN103015959A CN 103015959 A CN103015959 A CN 103015959A CN 2012104994106 A CN2012104994106 A CN 2012104994106A CN 201210499410 A CN201210499410 A CN 201210499410A CN 103015959 A CN103015959 A CN 103015959A
- Authority
- CN
- China
- Prior art keywords
- hydrate
- sediment
- mixture
- gas
- deposit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a mechanical-thermal hydrate exploiting method. The mechanical-thermal hydrate exploiting method comprises the following steps: excavating a hydrate stratum, crushing hydrate sediment into hydrate sediment granules, and conveying the hydrate sediment granules into a decomposing chamber; stirring and mixing relatively hot seawater and the hydrate sediment granules in the decomposing chamber, partially decomposing the hydrate sediment granules, separating the obtained mixture, and removing the separated sediment; upwardly conveying the remaining mixture along an exploiting shaft, further decomposing the hydrate in the mixture in the conveying process, and separating the remaining mixture and generated gas from the sediment in the mixture; and collecting the obtained gas on an exploiting platform. By the method, hydrate decomposing heat can be supplied by a huge heat source from seawater and convective heat transfer; expansion energy of gas which is generated in a centralized way can be made full use; backfill of the sediment can restore certain stratum strength; and leakage of the hydrate decomposing gas from a covering layer can be avoided.
Description
Technical field
The present invention relates to the method for production of water compound, relate in particular to the method for a kind of machinery-Re production of water compound.
Background technology
Gas hydrates are class ice solid chemical compounds that natural G﹠W forms under high pressure and cryogenic conditions.Hydrate sediment is distributed widely in the deep water ground environments such as land frozen soil environment and ocean, lake.It is estimated, the phosphorus content of hydrate is more than two times of global known fossil fuel content carbon.China has obtained respectively the hydrate sediment sample in THE NORTHERN SLOPE OF SOUTH CHINA SEA and Qilian mountains permafrost region, has confirmed that the Exploitation Potential of China's hydrate is very large, and strategic development planning is included in hydrate exploitation research.
At present, the hydrate exploitation method that proposes in the world mainly contains heat injection method, voltage drop method, injecting inhibitor method and displacement method etc., and carries out respectively the tentative exploitation of heat injection method, voltage drop method associating and displacement method, voltage drop method associating in the hydrate formation of Canadian Mallik and U.S. Alaska.Because decomposition of hydrate need to absorb a large amount of heat, and the heat of stratum consumption injection more than 90%, therefore, the decomposition of hydrate scope around the exploitation pit shaft is restricted, and production efficiency is not high, is difficult to reach the requirement of commercial-scale operation.
Summary of the invention
The hydrate production efficiency that the present invention is directed to prior art is not high, proposes the method for a kind of machinery-Re production of water compound, to satisfy the requirement of commercial-scale operation.
In order to address the above problem, the invention provides the method for a kind of machinery-Re production of water compound, comprise the steps:
Step 1 is excavated hydrate formation, and hydrate sediment is ground into the hydrate sediment particle, is sent to decomposition bin;
Step 2 will mix than hot sea water and described hydrate sediment particle in decomposition bin, make the decomposed in the hydrate sediment particle, and the mixture that obtains is separated, and remove and separate the deposit that obtains;
Step 3 is upwards carried remaining mixture along the exploitation pit shaft, and the hydrate in course of conveying in the mixture continues to decompose, and the gas of residue hydrate and generation separates with the deposit in the mixture;
Step 4 is collected the gas that obtains at production platform.
Preferably, said method also has following characteristics:
In described step 1, adopt colliery and deep-sea excavating equipment to excavate hydrate formation, described colliery and deep-sea excavating equipment are one or more combinations in the following equipment:
Drum shearer, hydraulic haulage shearer, electrical haulage shearer, abyssal floor metallic ore excavator etc.
Preferably, said method also has following characteristics:
In described step 1, adopt Particle Breakage equipment that the hydrate sediment powder is ground into the hydrate sediment particle, described Particle Breakage equipment is one or more combinations in the following equipment:
Jaw crusher, gyratory crusher etc.
Preferably, said method also has following characteristics:
Describedly than hot sea water be: the surface seawater about 25 ℃.
Preferably, said method also has following characteristics:
In described step 2, utilize the modes such as centrifugation or fluidization that the mixture that obtains is separated.
Preferably, said method also has following characteristics:
Described step 2 also comprises: the deposit that separation is obtained is backfilling in the stratum after the excavation by decomposition bin.
Preferably, said method also has following characteristics:
Described step 4 also comprises: utilize gas expansion to change into seawater injection and mechanical institute energy requirement.
Preferably, said method also has following characteristics:
Described step 4 also comprises: deposit is backfilling in the stratum after the excavation.
Method of the present invention is ground into hydrate sediment can supply with the heat of decomposition of hydrate by this huge thermal source of seawater with the granule of Fluid Flow in A, and convection heat transfer' heat-transfer by convection efficient is high; Take full advantage of and decompose the expansion work that produces methane gas, be transformed into the needed mechanical energy of production of water compound; With sedimental backfill, can guarantee to exploit rear stratum and have enough intensity; Hydrate decomposes in decomposition bin can avoid gas from tectal leakage.This method is not subjected to the impact of decomposition of hydrate scope, and production efficiency is high, is fit to the large-scale commercial applications exploitation.
Description of drawings
Fig. 1 is the schematic diagram of the machinery-Re production of water compound of the embodiment of the invention.
The specific embodiment
Hereinafter in connection with accompanying drawing embodiments of the invention are elaborated.Need to prove, in the situation that do not conflict, the embodiment among the application and the feature among the embodiment be any combination mutually.
Machinery-Re production of water compound is a kind of novel exploitation method that proposes in view of the existing problem that the exploitation method heat transfer efficiency is slow, production efficiency is low, and its basic ideas are to excavate hydrate formation and hydrate powder is broken into particle by plant equipment as the mining of mining; Then in the decomposition of hydrate storehouse of in advance design, realize the proportioning blending than supply, granule and the seawater of hot sea water, and carry out deposit and separate and backfill with the part of hydrate, water, gas; Then hydrate sediment, water, gas are carried along the exploitation pit shaft section of making progress, and the decomposition of hydrate aerogenesis separates sinking with deposit; At last, gas is collected at production platform, and the gas expansion merit changes into mechanical energy, the deposit backfill of sinking, as shown in Figure 1.
Below the present invention is described in detail:
The method of a kind of machinery of the embodiment of the invention-Re production of water compound comprises the steps:
Step 1 is excavated hydrate formation, and hydrate sediment is ground into the hydrate sediment particle, is sent to decomposition bin;
At present, can use for reference the plant equipment of carrying out machinery-Re production of water compound has: 1) colliery and deep-sea excavating equipment comprise drum shearer, hydraulic haulage shearer, electrical haulage shearer, abyssal floor metallic ore excavator etc.; 2) Particle Breakage equipment comprises jaw crusher, gyratory crusher etc.; 3) transfer equipment comprises track machine transmission, conveyer belt etc.At present, these equipment can satisfy excavation, the pulverizing of rock/ground in the anhydrous tunnel, the demand of transmission.
Step 2 will mix than hot sea water and described hydrate sediment particle (below the effective diameter 15mm) in decomposition bin, make the decomposed in the hydrate sediment particle, and the mixture that obtains is separated, and remove and separate the deposit that obtains;
This step is carried out in decomposition bin.Decomposition bin is a high-pressure chamber, can stablize and bear the fluctuation of the internal pressure of decomposition of hydrate and disturbance thereof under the deep water static pressure.The surface seawater that will have the temperature higher (about 25 ℃) of huge heat energy by pipeline is transported to the bottom hydrate layer, in decomposition bin, stir blending with the hydrate sediment particle that is ground into, in this process, partially hydrated thing in the deposit decomposes, form the multi phase state-multicomponent of deposit, water, gas, hydrate but have the mixture of different densities, utilize the mode such as centrifugation or fluidization so that multi-component part is separated, isolated deposit is backfilling in the stratum after the excavation by decomposition bin.
Step 3 is upwards carried remaining mixture along the exploitation pit shaft, and the hydrate in course of conveying in the mixture continues to decompose, and the gas of residue hydrate and generation separates with the deposit in the mixture;
In this step, the mode of the mixture after stirring blending in the decomposition bin and the separation by pumping promoted along the exploitation pit shaft section of making progress, owing to convection heat transfer' heat-transfer by convection, hydrate continues decomposition, produces more G﹠W in the lifting process; Separate under the gravitational difference that gas, water, hydrate and deposit produce owing to density in pipeline transmission.Therefore, present the Multiphase Flow feature of segmentation in the exploitation pit shaft, sediment-water compound-gas-particle water stream, hydrate-gas-particle water stream, gas-water two phase flow.
Step 4 is collected the gas that obtains at production platform;
Decomposition of hydrate generates a large amount of gas in multi phase state-multi-component mixture lifting process, because the density contrast air accumulation.Its acting of expanding is used, satisfy inject seawater, machinery excavate pulverize transmit and the required part mechanical energy of lifting of hydrate sediment, improve production efficiency and economy.In addition, deposit is backfilling in the stratum after the excavation.
In sum, the basic procedure of machinery-thermal recovery is: hydrate sedimentary deposit excavation → particle pulverizing → mixture transmission → sea water supply \ Jiao Banhunhe Shui Hewufenxie Duo Xiangfenli deposit backfill → grain flow conveying → gas expansion transforms the backfill of Ji Xieneng Qi Tishouji deposit.
Method of the present invention is transformed into hydrate sediment can be with the granule of Fluid Flow in A, therefore, both can be by the heat of seawater and this huge thermal source supply decomposition of hydrate of convection heat transfer' heat-transfer by convection, can take full advantage of again the energy of the gas expansion of concentrating output, also sedimental backfill can be recovered certain formation strength, also avoid the gas of decomposition of hydrate from tectal leakage.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for machinery-Re production of water compound comprises the steps:
Step 1 is excavated hydrate formation, and hydrate sediment is ground into the hydrate sediment particle, is sent to decomposition bin;
Step 2 will mix than hot sea water and described hydrate sediment particle in decomposition bin, make the decomposed in the hydrate sediment particle, and the mixture that obtains is separated, and remove and separate the deposit that obtains;
Step 3 is upwards carried remaining mixture along the exploitation pit shaft, and the hydrate in course of conveying in the mixture continues to decompose, and the gas of residue hydrate and generation separates with the deposit in the mixture;
Step 4 is collected the gas that obtains at production platform.
2. the method for claim 1 is characterized in that,
In described step 1, adopt colliery and deep-sea excavating equipment to excavate hydrate formation, described colliery and deep-sea excavating equipment are one or more combinations in the following equipment:
Drum shearer, hydraulic haulage shearer, electrical haulage shearer, abyssal floor metallic ore excavator etc.
3. the method for claim 1 is characterized in that,
In described step 1, adopt Particle Breakage equipment that the hydrate sediment powder is ground into the hydrate sediment particle, described Particle Breakage equipment is one or more combinations in the following equipment:
Jaw crusher, gyratory crusher etc.
4. the method for claim 1 is characterized in that,
Describedly than hot sea water be: the surface seawater about 25 ℃.
5. the method for claim 1 is characterized in that,
In described step 2, utilize the modes such as centrifugation or fluidization that the mixture that obtains is separated.
6. the method for claim 1 is characterized in that,
Described step 2 also comprises: the deposit that separation is obtained is backfilling in the stratum after the excavation by decomposition bin.
7. the method for claim 1 is characterized in that,
Described step 4 also comprises: utilize gas expansion to change into seawater injection and mechanical institute energy requirement.
8. the method for claim 1 is characterized in that,
Described step 4 also comprises: deposit is backfilling in the stratum after the excavation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104994106A CN103015959A (en) | 2012-11-29 | 2012-11-29 | Mechanical-thermal hydrate exploiting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104994106A CN103015959A (en) | 2012-11-29 | 2012-11-29 | Mechanical-thermal hydrate exploiting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103015959A true CN103015959A (en) | 2013-04-03 |
Family
ID=47965004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104994106A Pending CN103015959A (en) | 2012-11-29 | 2012-11-29 | Mechanical-thermal hydrate exploiting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103015959A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104877723A (en) * | 2015-04-21 | 2015-09-02 | 西南石油大学 | Process for directly decomposing and separating natural gas hydrate mined by solid fluidization on seabed |
| CN104897854A (en) * | 2015-05-28 | 2015-09-09 | 中国科学院力学研究所 | Experiment method and experiment device for decomposing hydrate |
| CN104895546A (en) * | 2015-04-21 | 2015-09-09 | 西南石油大学 | Natural gas hydrate seabed separation technology based on solid state fluidization exploitation |
| CN105019868A (en) * | 2015-07-30 | 2015-11-04 | 迈瑞尔实验设备（上海）有限公司 | Seabed combustible ice mining method |
| CN105064959A (en) * | 2015-08-14 | 2015-11-18 | 西南石油大学 | Method for green extraction of seabed unstratlfied rock natural gas hydrate |
| CN105545257A (en) * | 2016-01-11 | 2016-05-04 | 西南石油大学 | Exploitation method and equipment for natural gas hydrate on shallow layer of seabed |
| CN105587303A (en) * | 2016-03-08 | 2016-05-18 | 西南石油大学 | Green mining method and mining device for submarine shallow non-diagenetic natural gas hydrate |
| CN105822267A (en) * | 2016-03-31 | 2016-08-03 | 杨溢 | Method and device for exploiting deep-sea natural gas hydrate |
| CN105858228A (en) * | 2016-04-26 | 2016-08-17 | 中南大学 | Method for hydraulically elevating ore in deep shaft through double pipes |
| CN106761589A (en) * | 2017-01-03 | 2017-05-31 | 中国石油大学(北京) | A kind of method of Gas Hydrate In Sea Areas reservoir reconstruction exploitation |
| CN107489412A (en) * | 2017-10-17 | 2017-12-19 | 西南石油大学 | A kind of sea-bottom shallow gas hydrates underground separates backfill system in real time on the spot |
| CN108590594A (en) * | 2018-04-02 | 2018-09-28 | 齐鲁工业大学 | A kind of method and apparatus system to be tapped natural gas using sea surface warm water |
| CN108661606A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | The methane of seabed combustible ice generates generating means |
| CN108661605A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | Methane for seabed combustible ice mineral reserve fragment, which generates, improves A type generating means |
| CN109488258A (en) * | 2018-12-06 | 2019-03-19 | 青岛海洋地质研究所 | Sea-bottom surface hydrate quarrying apparatus and its recovery method |
| CN110374557A (en) * | 2019-08-01 | 2019-10-25 | 中国石油工程建设有限公司 | A kind of gas hydrates subsea production system and method based on fluidisation exploitation |
| CN111852409A (en) * | 2020-07-24 | 2020-10-30 | 黑龙江科技大学 | Natural gas hydrate exploitation device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4607888A (en) * | 1983-12-19 | 1986-08-26 | New Tech Oil, Inc. | Method of recovering hydrocarbon using mining assisted methods |
| CN1587641A (en) * | 2004-09-21 | 2005-03-02 | 中国科学院广州能源研究所 | Method and device for sea natural gas hydrate production |
| CN101818635A (en) * | 2010-04-02 | 2010-09-01 | 吉林大学 | Method for exploiting natural gas hydrates by using high-pressure thermal jetting |
| WO2011072963A1 (en) * | 2009-12-17 | 2011-06-23 | Shell Internationale Research Maatschappij B.V. | Converting an underwater methane hydrate containing deposit into a marketable product |
| CN102704894A (en) * | 2012-05-30 | 2012-10-03 | 上海交通大学 | In-situ submarine natural gas hydrate exploiting device and method thereof |
-
2012
- 2012-11-29 CN CN2012104994106A patent/CN103015959A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4607888A (en) * | 1983-12-19 | 1986-08-26 | New Tech Oil, Inc. | Method of recovering hydrocarbon using mining assisted methods |
| CN1587641A (en) * | 2004-09-21 | 2005-03-02 | 中国科学院广州能源研究所 | Method and device for sea natural gas hydrate production |
| WO2011072963A1 (en) * | 2009-12-17 | 2011-06-23 | Shell Internationale Research Maatschappij B.V. | Converting an underwater methane hydrate containing deposit into a marketable product |
| CN101818635A (en) * | 2010-04-02 | 2010-09-01 | 吉林大学 | Method for exploiting natural gas hydrates by using high-pressure thermal jetting |
| CN102704894A (en) * | 2012-05-30 | 2012-10-03 | 上海交通大学 | In-situ submarine natural gas hydrate exploiting device and method thereof |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895546A (en) * | 2015-04-21 | 2015-09-09 | 西南石油大学 | Natural gas hydrate seabed separation technology based on solid state fluidization exploitation |
| CN104877723A (en) * | 2015-04-21 | 2015-09-02 | 西南石油大学 | Process for directly decomposing and separating natural gas hydrate mined by solid fluidization on seabed |
| CN104897854A (en) * | 2015-05-28 | 2015-09-09 | 中国科学院力学研究所 | Experiment method and experiment device for decomposing hydrate |
| CN105019868A (en) * | 2015-07-30 | 2015-11-04 | 迈瑞尔实验设备（上海）有限公司 | Seabed combustible ice mining method |
| CN105064959B (en) * | 2015-08-14 | 2017-12-12 | 西南石油大学 | A kind of lasting exploit method of the non-diagenesis gas hydrates in seabed |
| CN105064959A (en) * | 2015-08-14 | 2015-11-18 | 西南石油大学 | Method for green extraction of seabed unstratlfied rock natural gas hydrate |
| CN105545257A (en) * | 2016-01-11 | 2016-05-04 | 西南石油大学 | Exploitation method and equipment for natural gas hydrate on shallow layer of seabed |
| CN105545257B (en) * | 2016-01-11 | 2018-07-20 | 西南石油大学 | A kind of recovery method and equipment of sea-bottom shallow gas hydrates |
| CN105587303A (en) * | 2016-03-08 | 2016-05-18 | 西南石油大学 | Green mining method and mining device for submarine shallow non-diagenetic natural gas hydrate |
| CN105822267A (en) * | 2016-03-31 | 2016-08-03 | 杨溢 | Method and device for exploiting deep-sea natural gas hydrate |
| CN105858228A (en) * | 2016-04-26 | 2016-08-17 | 中南大学 | Method for hydraulically elevating ore in deep shaft through double pipes |
| CN106761589A (en) * | 2017-01-03 | 2017-05-31 | 中国石油大学(北京) | A kind of method of Gas Hydrate In Sea Areas reservoir reconstruction exploitation |
| CN106761589B (en) * | 2017-01-03 | 2018-12-25 | 中国石油大学(北京) | A kind of method of Gas Hydrate In Sea Areas reservoir reconstruction exploitation |
| CN108661605B (en) * | 2017-03-30 | 2022-01-18 | 中国计量大学 | Improved A-type generating device for generating methane for fragments of seabed combustible ice mineral reserves |
| CN108661606A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | The methane of seabed combustible ice generates generating means |
| CN108661605A (en) * | 2017-03-30 | 2018-10-16 | 梁嘉麟 | Methane for seabed combustible ice mineral reserve fragment, which generates, improves A type generating means |
| CN108661606B (en) * | 2017-03-30 | 2022-07-19 | 中国计量大学 | Methane generation device for seabed combustible ice |
| CN107489412A (en) * | 2017-10-17 | 2017-12-19 | 西南石油大学 | A kind of sea-bottom shallow gas hydrates underground separates backfill system in real time on the spot |
| CN108590594A (en) * | 2018-04-02 | 2018-09-28 | 齐鲁工业大学 | A kind of method and apparatus system to be tapped natural gas using sea surface warm water |
| CN109488258B (en) * | 2018-12-06 | 2019-08-06 | 青岛海洋地质研究所 | Sea-bottom surface hydrate quarrying apparatus and its recovery method |
| CN109488258A (en) * | 2018-12-06 | 2019-03-19 | 青岛海洋地质研究所 | Sea-bottom surface hydrate quarrying apparatus and its recovery method |
| CN110374557A (en) * | 2019-08-01 | 2019-10-25 | 中国石油工程建设有限公司 | A kind of gas hydrates subsea production system and method based on fluidisation exploitation |
| CN110374557B (en) * | 2019-08-01 | 2024-06-11 | 中国石油工程建设有限公司 | Natural gas hydrate underwater production system and method based on fluidization exploitation |
| CN111852409A (en) * | 2020-07-24 | 2020-10-30 | 黑龙江科技大学 | Natural gas hydrate exploitation device and method |
| CN111852409B (en) * | 2020-07-24 | 2022-05-06 | 黑龙江科技大学 | Natural gas hydrate exploitation device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103015959A (en) | Mechanical-thermal hydrate exploiting method | |
| CN105064959B (en) | A kind of lasting exploit method of the non-diagenesis gas hydrates in seabed | |
| CN105587303B (en) | The lasting exploit method and quarrying apparatus of the non-diagenesis gas hydrates of sea-bottom shallow | |
| Xie et al. | Groundbreaking theoretical and technical conceptualization of fluidized mining of deep underground solid mineral resources | |
| CN107642346B (en) | Pilot back-dragging jet mining method and mining device for seabed shallow layer non-diagenetic natural gas hydrate | |
| CN105822266B (en) | Sea bed gas hydrate slurry decomposition and separation is with removing silt modularization mining system | |
| CN102213090B (en) | Method and device for exploiting natural gas hydrate in permafrost region | |
| CN103628880B (en) | The green mining system of deep seafloor shallow-layer non-diagenesis formation gas hydrate | |
| CN103628844B (en) | The recovery method of the non-diagenesis formation gas hydrate of deep seafloor shallow-layer | |
| CA2861909C (en) | Oil shale exploitation method | |
| Väli et al. | Usage of Estonian oil shale | |
| Ju et al. | Fluidized mining and in-situ transformation of deep underground coal resources: a novel approach to ensuring safe, environmentally friendly, low-carbon, and clean utilisation | |
| CN106522958A (en) | Cutter exploitation method of seabed natural gas hydrates | |
| CN102287177A (en) | Method for gasifying underground coal | |
| CN103216219A (en) | Method for extracting natural gas hydrate through CO2/N2 underground replacement | |
| Xu et al. | Progress in exploration, development and utilization of oil shale in China | |
| CN103046930B (en) | Suction type hydrate mining device and method | |
| Mei-feng et al. | Co-mining of mineral and geothermal resources: a state-of-the-art review and future perspectives | |
| CN116752194B (en) | In-situ efficient electrolytic exploitation device and method for bauxite under middle-shallow coal | |
| CN113338934A (en) | Deep coal fluidization exploitation in-situ gasification device | |
| Matsui et al. | Highwall mining system with backfilling | |
| Iwuji et al. | Earth resources exploitation and sustainable development: Geological and engineering perspectives | |
| CN111980710B (en) | Recyclable and continuous natural gas hydrate exploitation device with desulfurization system and exploitation method | |
| Kaplunov et al. | Principles of projecting mining-and-engineering systems for integrated mineral mining with a combined geotechnology | |
| Kuznetsov et al. | Coal resources, production and use in the Russian Federation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |
|
| RJ01 | Rejection of invention patent application after publication |