CN115538994A - Technical requirements of deep submersible pump necessarily arranged at bottom of methane generating device for exploiting combustible ice deposit exposed on seabed surface - Google Patents
Technical requirements of deep submersible pump necessarily arranged at bottom of methane generating device for exploiting combustible ice deposit exposed on seabed surface Download PDFInfo
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- CN115538994A CN115538994A CN202111614094.8A CN202111614094A CN115538994A CN 115538994 A CN115538994 A CN 115538994A CN 202111614094 A CN202111614094 A CN 202111614094A CN 115538994 A CN115538994 A CN 115538994A
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- Prior art keywords
- submersible pump
- deep submersible
- combustible ice
- deep
- water
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 8
- 239000011707 mineral Substances 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 239000011435 rock Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 230000009189 diving Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 4
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- -1 Natural gas hydrates Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Wind Motors (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Earth Drilling (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The technical requirements of a deep submersible pump which is necessary for exploiting the bottom of a methane generating device of a seabed surface exposed combustible ice mineral deposit are as follows: according to the known knowledge, the depth of the distribution of the marine combustible ice deposits can reach about several kilometers at most, and then the deep submersible pump (B) can implement a process of frequently and repeatedly working in a high-lift (without any limitation on lift) starting mode and stopping mode within a disposable extremely long time (for example: at least one year) under the condition that the interior of the rigid pipeline (4) at the depth of about several kilometers on the seabed is full of water, and in the period: even if a so-called maintenance work belonging to a normal dismantling machine for removing water seepage from the interior of the pump as in the prior art occurs. The submersible pump in the prior art adopts the dummy rubber sealing element to prevent water from permeating into the interior of a person, so that the disposable service life is extremely short. The device can not adapt to the deep diving requirement unless special technical measures are adopted, but is difficult to repeatedly use for starting up and stopping for many times.
Description
Technical Field
The invention relates to a technical requirement of a deep submersible pump which is necessary to be arranged at the bottom of a methane generating device for exploiting a bared combustible ice mineral on the surface of the sea bottom.
Background
With the huge consumption of resources, mankind has faced a huge crisis of resources in particular in the beginning of the 21 st century, and as for the countries with energy consumption, the crude oil import has exceeded one hundred million tons in China, the output of domestic onshore oil and gas fields is reluctantly kept stable, and experts estimate that the vast majority of breakthroughs can hardly be made in a short time. Natural gas hydrates, which are readily combustible ice, are gaining favor as an alternative energy source in all countries of the world, especially developed countries.
Taking gas hydrates formed at the sea floor as an example: at the ambient temperature of 1-20 ℃, as long as the water depth is 300 meters, namely 30 atmospheric pressures are reached, natural gas hydrate, namely a combustible ice mineral deposit, can be formed; and the environment being above the temperature or/and the environment being below the pressure, the natural gas hydrate is encouraged to decompose into methane and water.
The storage amount of combustible ice minerals in the world is 2 times of the storage amount of combustible minerals such as petroleum, and the combustible ice minerals can be used by the global population for 1000 years; theoretical calculation, 1m 3 Can release 164m under standard conditions 3 Methane gas, while natural gas hydrate combustion produces only CO 2 And H 2 O, which is an inexhaustible green clean energy.
The south China sea contains abundant combustible ice deposits on the sea bottom, however, the combustible ice deposits are not mined out like other sea areas in the world, and the main reason is that the mining cost of the combustible ice is high, about $ 200/m 3 。
Many "laboratory" methods have been developed, but these methods are in the exploration phase and are difficult to enter into practical, scalable commercial exploitation phases.
Disclosure of Invention
The purpose of the invention is: the high-standard technical requirement of the deep submersible pump for exploiting the submarine combustible ice is met.
The key points of the invention are as follows: the disposable underwater use process is extremely long.
The invention has the characteristics that: the normal maintenance phenomenon that the machine needs to be disassembled to eliminate the water seepage in the submersible pump does not exist within a very long period of time in the disposable use process.
Drawings
Fig. 1 illustrates the structural principle of a methanogenesis generation apparatus for seabed combustible ice mineral fragments.
1: an exhaust duct; 2: a water discharge pipeline; 3: a sealed methane collecting and distributing chamber (a temporary working chamber for people to enter with an oxygen cylinder); 4: a rigid conduit; 5: the sealing cover can be turned up and down; 6: mining the obtained combustible ice fragments; 7: a combustible ice fragment feed inlet; 8: a counter weight foundation with an inverted conical bottom; 9: a water supply pressure-increasing valve (provided to open the sealing cover for pressurization); d: a deep water conveyor belt; b: a deep submersible pump; r: a microwave heater;
w: a receiving net which can vertically lift and intercept other broken miscellaneous stone blocks; g: a sealed cabin turning mechanism of the bottom machine room; dotted arrow
The flow direction of methane (gas) is indicated; solid arrows "→": the flow direction of the water is indicated.
Detailed Description
In order to achieve the above object of the present invention, the following technical solutions are proposed:
the main structure of the invention is characterized in that:
the methane generating device is characterized by at least comprising a body of a methane generating device, wherein a rigid pipeline 4 is inserted from the sea level and positioned on a seabed rock stratum, the outer bottom surface of the body is provided with an inverted cone-shaped counterweight foundation 8 which can be matched with the position of a joint part of the seabed rock stratum, the lower part in the body is provided with a deep submersible pump B, a broken miscellaneous stone block collecting net W which can vertically rise to the sea level is arranged between the upper part of the deep submersible pump B and a feed inlet 7, a microwave heater R is arranged above the feed inlet 7, and a turnover sealed cabin G mechanism of a bottom machine room is arranged above the microwave heater R;
the feed inlet 7 is provided with a sealing cover 5 which can be opened or closed by remote control turning:
when the sealing cover 5 is opened, the feed port 7 can be in non-connection type position connection with the end part of the externally connected underwater conveyor belt D, and combustible ice fragments 6 conveyed by the underwater conveyor belt D are accurately received;
an internal remote control water supply pressure-increasing valve 9 is arranged below the water surface at the outer side of the rigid pipeline 4, and the sealing cover 5 can be opened only when the pressure of the internal water supply is increased and is consistent with the pressure of the water body at the outer side;
a drainage pipeline 2 is arranged above the deep submersible pump B and used for externally draining the accumulated water which can be automatically drained at any time through the deep submersible pump B;
the technical requirements of the deep submersible pump B are as follows:
according to the known knowledge, the depth of the distribution of the marine combustible ice deposits can reach about several kilometers at most, and then the deep submersible pump B can be implemented in the rigid pipeline 4 at the depth of about several kilometers on the seabed on the premise of being filled with water, and can periodically start up and stop at a high lift in a frequently repeated working process within a very long time period, wherein: even if a so-called maintenance work is performed to remove water seepage from the interior of the pump, which is the case with a normal dismantling machine as in the prior art.
The following is explained:
the invention is based on the premise that a mining method similar to that of an open pit coal mine is adopted, except that the combustible ice deposits on the surface of the seabed are mined under the condition of deep dew, namely all underwater appliances related to the scheme have to be basic conditions capable of bearing deep diving.
Here, it can be said that: all core technologies related to deep diving equipment have been at a level close to complete resolution. The core technology that has been solved here must be done at least to overcome the key drawbacks of the submersible pumps of the prior art: diving is shallow (on the order of tens of meters at most), and the submersible pump is required to be periodically ashore for maintenance (with intervals of months or weeks) for removing internal seepage water, and the length and length of the periodic interval time period are proportional to the diving depth of the submersible pump in diving operation.
Claims (1)
1. The technical requirements of a deep submersible pump which is necessary for exploiting the bottom of a methane generating device of a seabed surface exposed combustible ice mineral deposit are as follows:
it is characterized in that the methane generating device structurally comprises:
the machine body is composed of at least one rigid pipeline (4) which is inserted from the sea level and positioned on the seabed rock stratum, the outer bottom surface of the machine body is provided with an inverted cone-shaped counterweight foundation (8) which can be matched with the joint part of the seabed rock stratum, and the lower part in the machine body is provided with a deep submersible pump (B); a broken miscellaneous stone block collecting net (W) capable of vertically ascending to the sea level is arranged between the upper part of the deep submersible pump (B) and the feeding port (7), a microwave heater (R) is arranged above the feeding port (7), and a turning sealing hatch cover mechanism (G) of a bottom machine room is arranged above the microwave heater (R);
the feed inlet (7) is provided with a sealing cover (5) which can be opened or closed by remote control turning:
when the sealing cover (5) is opened, the feed inlet (7) and the end part of the externally connected underwater conveyer belt (D) can implement non-connection type position connection, and accurately receive combustible ice fragments (6) conveyed by the underwater conveyer belt (D);
an internal remote control water supply pressure-increasing valve (9) is arranged below the water surface at the outer side of the rigid pipeline (4), and the sealing cover (5) can be opened only when the pressure of the internal water supply is increased and is consistent with the pressure of the water body at the outer side;
a drainage pipeline (2) is arranged above the deep submersible pump (B) and is used for externally draining accumulated water which can be automatically drained at any time through the deep submersible pump (B);
the technical requirements of the deep submersible pump (B) are as follows:
according to the known knowledge about the distribution depth of the ocean combustible ice deposits, the maximum depth can reach about several kilometers, and then the deep submersible pump (B) can implement a process of repeated frequent work in a high-lift startup mode and shutdown periodically within a very long time period on the premise that the interior of a rigid pipeline (4) at the depth of about several kilometers on the seabed is full of water, and in the process: even if a so-called maintenance work belonging to a normal dismantling machine for removing water seepage from the interior of the pump as in the prior art occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111614094.8A CN115538994A (en) | 2017-03-30 | 2017-03-30 | Technical requirements of deep submersible pump necessarily arranged at bottom of methane generating device for exploiting combustible ice deposit exposed on seabed surface |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230727.2A CN108661605B (en) | 2017-03-30 | 2017-03-30 | Improved A-type generating device for generating methane for fragments of seabed combustible ice mineral reserves |
| CN202111614094.8A CN115538994A (en) | 2017-03-30 | 2017-03-30 | Technical requirements of deep submersible pump necessarily arranged at bottom of methane generating device for exploiting combustible ice deposit exposed on seabed surface |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710230727.2A Division CN108661605B (en) | 2017-03-30 | 2017-03-30 | Improved A-type generating device for generating methane for fragments of seabed combustible ice mineral reserves |
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| CN115538994A true CN115538994A (en) | 2022-12-30 |
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Family Applications (9)
| Application Number | Title | Priority Date | Filing Date |
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| CN202111614092.9A Pending CN115538993A (en) | 2017-03-30 | 2017-03-30 | Method for arranging broken and mixed stone block collecting net vertically rising to sea level in methane generating device of seabed surface exposed combustible ice |
| CN202111418259.4A Pending CN114016974A (en) | 2017-03-30 | 2017-03-30 | Installation and construction method for exploiting seabed surface exposed combustible ice mineral methane generation device |
| CN202111607509.9A Pending CN115538989A (en) | 2017-03-30 | 2017-03-30 | Methane generation device for exploiting seabed surface exposed combustible ice mineral reserves |
| CN202111607510.1A Pending CN115538990A (en) | 2017-03-30 | 2017-03-30 | Wind power generation method related to exploiting seabed surface exposed combustible ice mineral deposit methane generation device |
| CN202111614091.4A Pending CN115538992A (en) | 2017-03-30 | 2017-03-30 | Method for quickly opening sealing cover in methane generating device for exploiting exposed combustible ice on seabed surface under environment of extremely high pressure difference |
| CN202111614094.8A Pending CN115538994A (en) | 2017-03-30 | 2017-03-30 | Technical requirements of deep submersible pump necessarily arranged at bottom of methane generating device for exploiting combustible ice deposit exposed on seabed surface |
| CN201710230727.2A Expired - Fee Related CN108661605B (en) | 2017-03-30 | 2017-03-30 | Improved A-type generating device for generating methane for fragments of seabed combustible ice mineral reserves |
| CN202111607636.9A Pending CN115538991A (en) | 2017-03-30 | 2017-03-30 | Installation and construction method for exploiting seabed surface exposed combustible ice mineral methane generation device |
| CN202111418260.7A Active CN114016975B (en) | 2017-03-30 | 2017-03-30 | Method of using a methanogenesis apparatus for subsea combustible ice mineral fragments |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111614092.9A Pending CN115538993A (en) | 2017-03-30 | 2017-03-30 | Method for arranging broken and mixed stone block collecting net vertically rising to sea level in methane generating device of seabed surface exposed combustible ice |
| CN202111418259.4A Pending CN114016974A (en) | 2017-03-30 | 2017-03-30 | Installation and construction method for exploiting seabed surface exposed combustible ice mineral methane generation device |
| CN202111607509.9A Pending CN115538989A (en) | 2017-03-30 | 2017-03-30 | Methane generation device for exploiting seabed surface exposed combustible ice mineral reserves |
| CN202111607510.1A Pending CN115538990A (en) | 2017-03-30 | 2017-03-30 | Wind power generation method related to exploiting seabed surface exposed combustible ice mineral deposit methane generation device |
| CN202111614091.4A Pending CN115538992A (en) | 2017-03-30 | 2017-03-30 | Method for quickly opening sealing cover in methane generating device for exploiting exposed combustible ice on seabed surface under environment of extremely high pressure difference |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710230727.2A Expired - Fee Related CN108661605B (en) | 2017-03-30 | 2017-03-30 | Improved A-type generating device for generating methane for fragments of seabed combustible ice mineral reserves |
| CN202111607636.9A Pending CN115538991A (en) | 2017-03-30 | 2017-03-30 | Installation and construction method for exploiting seabed surface exposed combustible ice mineral methane generation device |
| CN202111418260.7A Active CN114016975B (en) | 2017-03-30 | 2017-03-30 | Method of using a methanogenesis apparatus for subsea combustible ice mineral fragments |
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| CN (9) | CN115538993A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115538993A (en) * | 2017-03-30 | 2022-12-30 | 中国计量大学 | Method for arranging broken and mixed stone block collecting net vertically rising to sea level in methane generating device of seabed surface exposed combustible ice |
| CN112127850B (en) * | 2019-06-24 | 2021-12-17 | 南京延长反应技术研究院有限公司 | Green process for exploiting combustible ice |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NO830639L (en) * | 1983-02-23 | 1984-08-24 | Jan Egil Floeysvik | DEVICE FOR DETERMINING AND CONTROL OF A FLUID DRAWING FROM AN OIL / GAS SOURCE, SPECIFICALLY UNDER AN UNCONTROLLED Blowout |
| US6245955B1 (en) * | 1998-09-01 | 2001-06-12 | Shell Oil Company | Method for the sub-sea separation of hydrocarbon liquids from water and gases |
| AU2008305441B2 (en) * | 2007-09-25 | 2014-02-13 | Exxonmobil Upstream Research Company | Method for managing hydrates in subsea production line |
| EP2226466A1 (en) * | 2009-02-13 | 2010-09-08 | Shell Internationale Research Maatschappij B.V. | Method for producing a marketable hydrocarbon composition from a hydrate deposit buried in the waterbottom |
| CN101555797B (en) * | 2009-05-19 | 2011-08-03 | 四川大学 | Extraction device for undersea gas hydrate and extraction method thereof |
| CA2798094C (en) * | 2010-05-04 | 2018-08-14 | Oxus Recovery Solutions Inc. | Submerged hydrocarbon recovery apparatus |
| CN201953359U (en) * | 2011-02-23 | 2011-08-31 | 中国地质科学院勘探技术研究所 | Automatic exploitation system of natural gas hydrate |
| US20120325489A1 (en) * | 2011-04-27 | 2012-12-27 | Bp Corporation North America Inc. | Apparatus and methods for use in establishing and/or maintaining controlled flow of hydrocarbons during subsea operations |
| CN102322264B (en) * | 2011-05-26 | 2014-07-02 | 上海交通大学 | Gas hydrate exploitation, well completion, collection and conveying platform system |
| TWI597095B (en) * | 2011-05-30 | 2017-09-01 | 蜆殼國際研究公司 | Converting an underwater methane hydrate containing deposit into a marketable product |
| CN102797441A (en) * | 2012-09-05 | 2012-11-28 | 徐中全 | Method and device for exploiting seabed combustible ice |
| CN103015959A (en) * | 2012-11-29 | 2013-04-03 | 中国科学院力学研究所 | Mechanical-thermal hydrate exploiting method |
| CN103510926B (en) * | 2013-04-15 | 2016-04-06 | 淄博高新区成大机械设计研究所 | The exploitation method of a kind of seabed combustible ice and system |
| CN103334729A (en) * | 2013-04-25 | 2013-10-02 | 李贤明 | Exploitation method and system of seabed methane hydrate |
| CN103352676B (en) * | 2013-07-08 | 2015-09-16 | 赵光书 | The quarrying apparatus of a kind of seabed combustible ice and exploitation method |
| EP2824276A1 (en) * | 2013-07-09 | 2015-01-14 | The European Union, represented by the European Commission | A device for collecting methane gas |
| CN103628844B (en) * | 2013-11-21 | 2017-07-18 | 中国海洋石油总公司 | The recovery method of the non-diagenesis formation gas hydrate of deep seafloor shallow-layer |
| CN104018815A (en) * | 2014-06-27 | 2014-09-03 | 华北水利水电大学 | Control system of exploitation process of submarine natural gas hydrate |
| CN104481467B (en) * | 2014-12-02 | 2016-09-07 | 辽宁石油化工大学 | A kind of method and apparatus exploiting seabed combustible ice |
| JP2016108774A (en) * | 2014-12-03 | 2016-06-20 | 三井造船株式会社 | Gas-hydrate recovery system, and recovery method thereof |
| CN104948144B (en) * | 2015-06-15 | 2017-08-04 | 西南石油大学 | A kind of utilization ultrasonic wave exploits the method and device of submarine surface gas hydrates |
| CN104948143B (en) * | 2015-06-15 | 2017-06-16 | 西南石油大学 | The recovery method and its quarrying apparatus of a kind of submarine surface gas hydrates |
| CN105804705B (en) * | 2016-03-24 | 2018-05-04 | 西南石油大学 | The sea-bottom natural gas collection device and method of built-in buoyancy tank helical pipe gas heating |
| CN106382237A (en) * | 2016-10-19 | 2017-02-08 | 中国计量大学 | Application method and structure of pump including immersion pump supported by air jacking seal |
| CN115538993A (en) * | 2017-03-30 | 2022-12-30 | 中国计量大学 | Method for arranging broken and mixed stone block collecting net vertically rising to sea level in methane generating device of seabed surface exposed combustible ice |
-
2017
- 2017-03-30 CN CN202111614092.9A patent/CN115538993A/en active Pending
- 2017-03-30 CN CN202111418259.4A patent/CN114016974A/en active Pending
- 2017-03-30 CN CN202111607509.9A patent/CN115538989A/en active Pending
- 2017-03-30 CN CN202111607510.1A patent/CN115538990A/en active Pending
- 2017-03-30 CN CN202111614091.4A patent/CN115538992A/en active Pending
- 2017-03-30 CN CN202111614094.8A patent/CN115538994A/en active Pending
- 2017-03-30 CN CN201710230727.2A patent/CN108661605B/en not_active Expired - Fee Related
- 2017-03-30 CN CN202111607636.9A patent/CN115538991A/en active Pending
- 2017-03-30 CN CN202111418260.7A patent/CN114016975B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115538993A (en) | 2022-12-30 |
| CN114016975A (en) | 2022-02-08 |
| CN115538992A (en) | 2022-12-30 |
| CN108661605A (en) | 2018-10-16 |
| CN114016974A (en) | 2022-02-08 |
| CN115538990A (en) | 2022-12-30 |
| CN115538991A (en) | 2022-12-30 |
| CN108661605B (en) | 2022-01-18 |
| CN115538989A (en) | 2022-12-30 |
| CN114016975B (en) | 2024-07-09 |
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