CN105781497A - Seabed natural gas hydrate collecting device - Google Patents
Seabed natural gas hydrate collecting device Download PDFInfo
- Publication number
- CN105781497A CN105781497A CN201610170980.9A CN201610170980A CN105781497A CN 105781497 A CN105781497 A CN 105781497A CN 201610170980 A CN201610170980 A CN 201610170980A CN 105781497 A CN105781497 A CN 105781497A
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- CN
- China
- Prior art keywords
- natural gas
- collecting hood
- gas collecting
- buoyant module
- marine riser
- 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.)
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- 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 title claims description 64
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 533
- 239000003345 natural gas Substances 0.000 claims abstract description 265
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000007789 gas Substances 0.000 claims abstract description 50
- 238000004873 anchoring Methods 0.000 claims abstract description 32
- 239000000725 suspension Substances 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 44
- 239000001301 oxygen Substances 0.000 claims description 44
- 229910052760 oxygen Inorganic materials 0.000 claims description 44
- 238000009423 ventilation Methods 0.000 claims description 43
- 238000010438 heat treatment Methods 0.000 claims description 37
- 238000013019 agitation Methods 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 238000012544 monitoring process Methods 0.000 claims description 14
- 238000012806 monitoring device Methods 0.000 claims description 10
- 238000000354 decomposition reaction Methods 0.000 abstract description 9
- 238000003756 stirring Methods 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 2
- 238000005485 electric heating Methods 0.000 abstract 1
- -1 natural gas hydrates Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 description 19
- 150000004677 hydrates Chemical class 0.000 description 14
- 230000009286 beneficial effect Effects 0.000 description 12
- 238000010494 dissociation reaction Methods 0.000 description 10
- 230000005593 dissociations Effects 0.000 description 10
- 239000013535 sea water Substances 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- 230000001737 promoting effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a seabed natural gas collecting device for suspension buoyancy tank electric heating, and belongs to the technical field of natural gas collection. The device comprises a mother ship and a hollowed natural gas collecting cover; a natural gas storage device is arranged on the mother ship, and is connected to the top of the natural gas collecting cover through a gas extracting pipeline; the natural gas collecting cover is connected to the bottom of the mother ship through a water separation pipe; the gas extracting pipeline is arranged in the water separation pipe; anchoring systems are arranged around the bottom of the natural gas collecting cover; a pressure adjusting system is arranged at the bottom of the natural gas collecting cover; a propelling system is arranged on the outer wall of the natural gas collecting cover; a density adjusting system is arranged on the natural gas collecting cover; and a temperature adjusting system and a stirring system are arranged in the natural gas collecting cover. The device mainly solves the problem of incapability of forming emission and leakage of natural gas in the decomposition, collection and extraction process of natural gas hydrates on a seabed mud bed.
Description
Technical field
The present invention relates to natural gas and gather technical field, especially sea bed gas hydrate acquisition technique.
Background technology
Sea bed gas hydrate is the crystalline solid that methane gas is formed with water molecules under the cryogenic high pressure environment in seabed, is the clean energy resource that a kind of reserves are huge, is hopeful petroleum replacing, coal becomes main energy sources.Gas hydrates are distributed widely in submarine sedimentary strata, have that reserves are big, the feature of weak cementing, poor stability, once the temperature of region, pressure condition change, it is possible to cause sea bed gas hydrate a large amount of decompose, gasification and freely discharging.
Owing to gas hydrates main decomposition is methane gas and water, but methane gas is greenhouse gases, discharges into the atmosphere in a large number and can cause greenhouse effect, environment is done great damage.How to ensure exploitation seabed gas hydrates process in natural gas do not reveal, not loss and how high efficiency decomposition gas hydrates, be all the main direction of studying of current sea bed gas hydrate mineral reserve exploitation.
In existing exploitation of gas hydrates technology, usually by voltage drop method, heat injection method or note chemical-agent technique etc., the Gas Hydrate that seabed has is converted into gas and water, the gas obtained after converting is collected, produce again through underwater production facility or floating production facility, there is presently no the exploitation way of the sea bed gas hydrate of a kind of maturation and system is formally put into commercial operation, the state such as the U.S., Japan all carries out the exploitation of experimental.
Main cause is that existing exploitation way is all more complicated, cost is high, and lack controllability and operability, leakage easily caused by methane gas, cause the greenhouse effect of environmental pollution and air, production efficiency is also unable to reach commercial development minimum requirements, all also in the test chamber exploratory stage, it is impossible to put into commercial operation.Accordingly, it would be desirable to one is capable of environmental protection, the mining system of economical and efficient, it is achieved the exploitation to sea bed gas hydrate.
Summary of the invention
The goal of the invention of the present invention is in that: for above-mentioned Problems existing, a kind of sea bed gas hydrate harvester is provided, mainly solve the gas hydrates of seabed mud bed, collect and in the process of exploitation decomposing, the loss of natural gas and the problem of leakage will not be formed, the present invention breaks through conventional thought pattern, utilize pressure to regulate formation negative pressure dexterously and humidity control system heats, promote the gas hydrate dissociation of seabed mud bed kind, it is beneficial to the exploitation of sea bed gas hydrate, then the acquisition rate of natural gas is greatly improved, exploitation for sea bed gas hydrate provides new direction；Visible, the present invention can pass through to density, pressure, temperature control to ensure steady production, natural gas collection is convenient, collecting efficiency height, can repeatedly use.
The technical solution used in the present invention is as follows:
The sea bed gas hydrate harvester of the present invention, natural gas collecting hood including interior sky, bottom described natural gas collecting hood, surrounding is provided with anchoring system, it is provided with pressure regulating system in the bottom of natural gas collecting hood, described natural gas collecting hood is configured with Auto-regulating System of Density of Heavy Medium system, it is provided with humidity control system and agitation system inside described natural gas collecting hood, described natural gas collecting hood outer wall is provided with propulsion system, described natural gas collecting hood is connected to bottom lash ship by marine riser, it is equipped with gas production pipe in described marine riser, described natural gas collecting hood top is connected to natural gas storage device by gas production pipe, described natural gas storage device is located on lash ship.
Due to said structure, lash ship is operated across the sea for operator and controls.Natural gas collecting hood can cover on the seabed mud bed specifying region, and the seabed mud bed in this region is sealed, and the natural gas in this region is collected, and the natural gas storage device being sent on lash ship by Gas Exploitation air pipe is stored up.Marine riser is for being all placed in one gas production pipe, pneumatic circuit, ventilation channel and cable etc., it is to avoid the sea water corrosion to it, it is ensured that its life-span.Anchoring system is located at surrounding bottom natural gas collecting hood, can be sealingly fastened in by collecting hood on the mud bed of seabed, it is ensured that carry out leaking in natural gas collection process.Liquid in collecting hood can be discharged by pressure regulating system, makes to be formed in airtight collecting hood negative pressure, promotes the gas hydrate dissociation of seabed mud bed kind, be beneficial to the exploitation of sea bed gas hydrate.Agitation system then, being after specifying region to gather certain time, by agitation system, seabed mud bed being stirred, thus promoting the deep layer decomposition of hydrate of seabed mud bed.Propulsion system, when can be used for transferring to natural gas collecting hood appointment region, finely tunes collecting hood, to guarantee being accurately positioned of collecting hood.And Auto-regulating System of Density of Heavy Medium system, then it is that the density to natural gas collecting hood itself is adjusted, thus controlling raising and decentralizing of collecting hood.The gas hydrates of seabed mud bed are present invention mainly solves, collect and in the process of exploitation decomposing, the loss of natural gas and the problem of leakage will not be formed, the present invention breaks through conventional thought pattern, utilize pressure to regulate formation negative pressure dexterously and humidity control system heats, promote the gas hydrate dissociation of seabed mud bed kind, be beneficial to the exploitation of sea bed gas hydrate, then greatly improving the acquisition rate of natural gas, the exploitation for sea bed gas hydrate provides new direction；Visible, the present invention can pass through to density, pressure, temperature control to ensure steady production, natural gas collection is convenient, collecting efficiency height, can repeatedly use.
The sea bed gas hydrate harvester of the present invention, described natural gas collecting hood includes housing, top platform, baffle plate and suspension ring, described housing is the pyramid structure of interior sky, and the top of described housing is set to top platform, and the bottom sides of described housing is connected with a circle ring baffle.
Due to said structure, the housing of the pyramid structure of interior sky, make housing be easy to manufacture, and structure is relatively reliable, is more conducive to natural gas and concentrates on the inner top of housing, it is simple to the collection of weather.Can be used for arranging buoyant module between ectonexine housing, so that whole collecting hood more compact structure；Top platform is used for connecting marine riser, it is simple to be attached between lash ship and collecting hood.The ring baffle on the base of housing, can will seal with seabed mud bed bottom collecting hood, thus forming negative pressure in can ensure that collecting hood, promoting the gas hydrate dissociation of seabed mud bed kind, being beneficial to the exploitation of sea bed gas hydrate.Suspension ring, can be used for lifting by crane collecting hood on the one hand, can be used for connecting floating buoyant module on the other hand, improve the control ability to collecting hood buoyancy.
The sea bed gas hydrate harvester of the present invention, described Auto-regulating System of Density of Heavy Medium system includes buoyant module, supplies the gentle pressure pipe road of die block；Described lash ship is provided with mean for die block；The described hollow pyramid structure of natural gas collecting hood, it is provided with some buoyant module between the inner and outer shell of described natural gas collecting hood, described buoyant module includes the interior empty van body sealed, electronic liquid level gauge is set in described casing, described casing is communicated with inside and outside drain pipe and air inlet pipe, all air inlet pipe are parallel on pneumatic circuit, and described pneumatic circuit is fixed on the shell of housing and through being connected to for die block from marine riser.
Due to said structure, wherein Auto-regulating System of Density of Heavy Medium system, by producing pressed gas for die block, and in the casing of buoyant module, feed pressed gas by pneumatic circuit, thus the water in casing can be discharged, thus the density reducing collecting hood itself lifts up；Contrary to being collected when transferring of cover, the pressed gas discharge in control chamber body can be passed through, increase the density of collecting hood itself in sea water entrance casing, make collecting hood transfer to seabed mud bed.All buoyant module being located between the inside and outside layer housing of collecting hood, so that the more compact structure of collecting hood entirety is simpler, and collecting hood is not easily affected by and produces mobile, is more conducive to transport and preserves.
The sea bed gas hydrate harvester of the present invention, described Auto-regulating System of Density of Heavy Medium system includes buoyant module, supplies the gentle pressure pipe road of die block；Described lash ship is provided with mean for die block；The described hollow pyramid structure of natural gas collecting hood, the outer wall of described natural gas collecting hood is provided with some buoyant module, described buoyant module includes the interior empty van body sealed, electronic liquid level gauge is set in described casing, described casing is communicated with inside and outside drain pipe and air inlet pipe, all air inlet pipe are parallel on pneumatic circuit, and described pneumatic circuit is fixed on the outer wall of housing and through being connected to for die block from marine riser.
Due to said structure, all buoyant module are located on collecting hood outer wall so that buoyant module is easily installed and fixes, and collecting hood is not easily affected by equally and produces mobile, be more conducive to transport and preserve；It addition, all buoyant module are located on collecting hood outer wall, make that buoyant module is passed through buoyancy the impact of collecting hood and control is more accurate.
The sea bed gas hydrate harvester of the present invention, described Auto-regulating System of Density of Heavy Medium system is located at the some buoyant module outside natural gas collecting hood, described buoyant module is connected on the suspension ring of natural gas collecting hood outer wall by hawser, described buoyant module is the interior empty van body sealed, the bottom of described buoyant module is provided with link, the top of described buoyant module is communicated with the drain pipe inside and outside buoyant module, and being provided with inside described buoyant module can the compressor of remote wireless controlled and the air bag that is connected with compressor.
Due to said structure, the some buoyant module connected by hawser outside natural gas collecting hood, the volume and weight of natural gas collecting hood can be reduced, produce and cost of transportation thus lowering it, and by the mode of outer company, buoyant module is attached, be more conducive to the monitoring to buoyant module and management, wherein the density of whole natural gas collecting hood is controlled by air bag size, when air bag increases, the water in casing is discharged density and reduces, thus the density reducing collecting hood itself lifts up；And when air bag reduces, water externally enters box house density from casing and increases, collecting hood is made to transfer to seabed mud bed；The size of air bag is then by compressor control, and compressor is then by long-range wireless operated so that control enhanced convenience quick.
The sea bed gas hydrate harvester of the present invention, described humidity control system includes ventilation channel, apparatus of oxygen supply and heater, described apparatus of oxygen supply is arranged on lash ship, described apparatus of oxygen supply is connected to ventilation channel, described ventilation channel is connected to inside natural gas collecting hood through marine riser, the part that described ventilation channel is positioned within natural gas collecting hood is arranged in the shape of a spiral, and wherein some heaters are fixed on the spiral position of ventilation channel.
Due to said structure, apparatus of oxygen supply produces oxygen, by ventilation channel, oxygen is supplied to heater, and oxygen and natural gas react in heater, and produce heat raising natural gas collecting hood internal temperature, it is beneficial to the gas hydrate dissociation promoting seabed mud bed kind.The part that wherein ventilation channel is positioned within natural gas collecting hood is arranged in the shape of a spiral, thus farthest heating in collecting hood region more can be met, thus promoting uniformly to heat up in the whole region of collecting hood, it is to avoid the technical problem that the excessive natural gas brought of local temperature difference gathers and causes danger.
The sea bed gas hydrate harvester of the present invention, described humidity control system includes heater and support, some supports side by side it are provided with in described natural gas collecting hood, any of which support is respectively and fixedly provided with some heaters, described heater is connected on cable, and described cable is connected to the control centre of lash ship through marine riser.
Wherein arranging some supports side by side in natural gas collecting hood, these supports are mounted and are fixed on the inwall of collecting hood, make the connection more temperature of collecting hood lean on；Still further aspect support is arranged side by side in collecting hood, collecting hood is made to be evenly equipped with support in the vertical, and each support is designed with heater, and when collecting case temperature and being too low, can by electrically heated mode to being heated in collecting hood, and make the homogeneous temperature within collecting hood, thus avoiding local temperature in collecting hood too high, forming the bigger temperature difference, causing natural gas instantaneous expansion pressure moment to increase, and the peril brought, it is ensured that production safety.And be controlled by cable by the control centre on lash ship so that control more convenient reliably, operate easier.
The sea bed gas hydrate harvester of the present invention, described humidity control system includes heating plant, heat supplying pipeline and heat exchanger, described lash ship is provided with mean for thermal, described heating plant is connected to heat supplying pipeline, described heat supplying pipeline is connected through marine riser with the heat exchanger in housing, wherein some heat exchangers are fixed on the inwall of housing, and are connected with heat supplying pipeline by valve.
Wherein it is fixed with some heat exchangers at the inwall of natural gas collecting hood, and these heat exchangers are connected on heating plant by heat supplying pipeline, visible by heating plant can directly in natural gas collecting hood heat exchanger provide heat energy, and heat energy is sent to heat exchanger by heat supplying pipeline, heat exchanger is made to carry out heat exchange at the inwall of natural gas collecting hood, thus transferring thermal energy in natural gas collecting hood, when collecting case temperature and being too low, heating plant can be passed through to the heat exchanger transferring heat energy in collecting hood, heat energy carries out heat exchange at the inwall of collecting hood, the heat energy distribution making whole collecting hood and inside thereof is uniform, thus avoiding local temperature in collecting hood too high, form the bigger temperature difference, natural gas instantaneous expansion pressure moment is caused to increase, and the peril brought, guarantee production safety.
The sea bed gas hydrate harvester of the present invention, described humidity control system includes heating plant, heat supplying pipeline, heat exchanger and water return pipeline, described lash ship is provided with mean for thermal, described heating plant is connected to heat supplying pipeline, described heat supplying pipeline traverse marine riser is to natural gas collecting hood, being provided with some branch lines being connected with heat supplying pipeline in described natural gas collecting hood, described branch line is provided with some heat exchangers；Described branch line is the frame structure identical with natural gas collecting hood shape, and described branch line connects back to water lines, and described water return pipeline is connected on lash ship heating plant through marine riser.
Wherein humidity control system is mainly used in the temperature within collecting hood is adjusted, when the temperature within natural gas collecting hood is too low, available heating plant by heat supplying pipeline to supplying hot water in natural gas collecting hood, the energy making hot water is transferred in the heat supplying pipeline in natural gas collecting hood, when after hot water reaches natural gas collecting hood through being further separated in each branch line, enter back in heat exchanger, the heat of hot water is discharged by heat exchanger in natural gas collecting hood, thus the temperature improved in natural gas collecting hood, guarantee that natural gas collects operation normally, hot water after heat exchange is back to heating plant through water return pipeline, thus it is reusable to form circulation.Wherein branch line is the frame structure identical with natural gas collecting hood shape, the heat energy distribution making whole collecting hood and inside thereof is uniform, thus avoiding local temperature in collecting hood too high, form the bigger temperature difference, natural gas instantaneous expansion pressure moment is caused to increase, and the peril brought, it is ensured that production safety.
The sea bed gas hydrate harvester of the present invention, described humidity control system includes apparatus of oxygen supply, ventilation channel and oxygen heater, described lash ship is provided with apparatus of oxygen supply, described apparatus of oxygen supply is connected to ventilation channel, described ventilation channel is connected to enclosure interior through marine riser, and described marine riser is connected with oxygen heater.
The sea bed gas hydrate harvester of the present invention, described pressure regulating system is located at the bottom of natural gas collecting hood, described pressure regulating system includes immersible pump and suction box, described immersible pump connects the suction box within natural gas collecting hood by water supply hose, and described immersible pump is by outside outlet pipe connection natural gas collecting hood.
Due to said structure, this pressure regulating system can pass through suction box, sea water within collecting hood is expelled to outside collecting hood by water supply hose and immersible pump, so that collecting hood is internally formed negative pressure, it is more conducive to promote the gas hydrate dissociation of seabed mud bed kind, it is beneficial to the exploitation of sea bed gas hydrate, then greatly improves the acquisition rate of natural gas；Pressure regulating system also ensures that the internal pressure of natural gas collecting hood is stable simultaneously.
The sea bed gas hydrate harvester of the present invention, described anchoring system is located at surrounding bottom natural gas collecting hood, described anchoring system includes screw rod, motor, actuating device and airtight anchoring shell, described anchoring shell is fixed on baffle plate top, it is fixed with motor in described anchoring shell, described motor connects actuating device and drives screw rod rotary motion, and described screw rod passes the bottom of anchoring shell.
Due to said structure, available motor controls screw rod by actuating device, screw rod is extend in the mud bed of seabed, collecting hood is fixed on the mud bed of seabed, guarantee sealing and the stability of collecting hood, avoid the impact on collecting hood of the environments such as subsea factor, thus can be effectively prevented from collecting and in the process of exploitation decomposing, the loss of natural gas and the problem of leakage.
The sea bed gas hydrate harvester of the present invention, the inner lower of described natural gas collecting hood is provided with agitation system, described agitation system includes driving and water jet device, and inner walls is fixed in described driving, and described water jet device is installed on driving upper energy following vehicle and moves.
Due to said structure, when the gas hydrates in same appointment sea-bed area gather after certain time, start agitation system, control water jet device alignment seabed mud bed and spray High-Pressure Water, stir seabed mud bed and promote deep layer decomposition of hydrate, it is beneficial to the exploitation of sea bed gas hydrate, then greatly improves the acquisition rate of natural gas.
The sea bed gas hydrate harvester of the present invention, is equipped with gas production pipe, pneumatic circuit, ventilation channel and cable in described marine riser；Wherein one end of gas production pipe is positioned at natural gas collecting hood top platform, and inside connection natural gas collecting hood, the other end is positioned on lash ship and connects natural gas storage device.
The sea bed gas hydrate harvester of the present invention, described propulsion system includes carrying platform, screw propeller and motor, and described carrying platform is fixed on the outer middle side part of natural gas collecting hood, and motor connects screw propeller and is arranged on carrying platform.
Due to said structure, when collecting hood is transferred to, during close to precalculated position, starting propulsion system and natural gas collecting hood is carried out fine position, it can be ensured that collecting hood arrives precalculated position, is more conducive to natural gas gathering in presumptive area.
The sea bed gas hydrate harvester of the present invention, monitoring system it is provided with in natural gas collecting hood, the described temperature that includes monitors device with pressure monitoring device and shell stress, described temperature and pressure monitoring device are arranged on inside natural gas collecting hood top platform, and some shell stress monitoring device is arranged on the hull outside of natural gas collecting hood；Described monitoring system, propulsion system, pressure regulating system, anchoring system, agitation system, humidity control system and Auto-regulating System of Density of Heavy Medium system are connected to control centre respectively through cable, and described control centre is located on lash ship.
Due to said structure, monitoring system can be monitored in collecting hood with implementing and force value on collecting hood, temperature value, thus can in real time collecting hood be monitored, it is to avoid pressure on natural gas collecting hood is excessive causes danger, it is ensured that operate safe and reliable；Or the too low collection that can not carry out natural gas of temperature, improves the acquisition rate of natural gas.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, the gas hydrates of seabed mud bed have been present invention mainly solves, collect and in the process of exploitation decomposing, the loss of natural gas and the problem of leakage will not be formed, the present invention breaks through conventional thought pattern, utilize pressure to regulate formation negative pressure dexterously and humidity control system heats, promote the gas hydrate dissociation of seabed mud bed kind, be beneficial to the exploitation of sea bed gas hydrate, then greatly improving the acquisition rate of natural gas, the exploitation for sea bed gas hydrate provides new direction.
2, the present invention can pass through to density, pressure, temperature control to ensure steady production, natural gas collection is convenient, collecting efficiency height, can repeatedly use, and novel, structure is ingenious, and the life-span is permanent, can be widely used for sea-bottom natural gas collection, applied widely, it is suitable for popularization and application.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
The schematic diagram of Fig. 1 to Figure 12 respectively embodiment 1 embodiment 12；
Figure 13 is the structural representation of buoyant module in embodiment 1,4,7 and 10；
Figure 14 is the structural representation of buoyant module in embodiment 2,5,8 and 11；
Figure 15 is the structural representation of buoyant module in embodiment 3,6,9 and 12.
Wherein the total accompanying drawing of Fig. 1 to Figure 12 is labeled as: 1-natural gas collecting hood, 101-housing, 102-top platform, 103-baffle plate, 104-suspension ring；3-pressure regulating system, 301-immersible pump, 302-suction box；5-lash ship, 6-propulsion system, 7-natural gas storage device, 8-anchoring system, 801-screw rod, 802-motor, 803-actuating device；9-agitation system, 10-monitors system, 12-gas production pipe, 13-marine riser.
Accompanying drawings different in Fig. 1 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；4-humidity control system, 401-ventilation channel, 402-apparatus of oxygen supply, 403-heater.
Accompanying drawings different in Fig. 2 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207-electronic liquid level gauge；4-humidity control system, 401-ventilation channel, 402-apparatus of oxygen supply, 403-heater.
Accompanying drawings different in Fig. 3 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-compressor, 203-air bag, 204-drain pipe；4-humidity control system, 401-ventilation channel, 402-apparatus of oxygen supply, 403-heater.
Accompanying drawings different in Fig. 4 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, and 202-is for die block, 203-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；4-humidity control system, 401-heater, 402-support.
Accompanying drawings different in Fig. 5 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；4-humidity control system, 401-heater, 402-support.
Accompanying drawings different in Fig. 6 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-compressor, 203-air bag, 204-drain pipe；4-humidity control system, 401-heater, 402-support.
Accompanying drawings different in Fig. 7 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；4-humidity control system, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger.
Accompanying drawings different in Fig. 8 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；4-humidity control system, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger.
Accompanying drawings different in Fig. 9 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-compressor, 203-air bag, 204-drain pipe；4-humidity control system, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger.
Accompanying drawings different in Figure 10 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；3-pressure regulating system, 301-immersible pump, 302-suction box；4-humidity control system, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger, 404-water return pipeline.
Accompanying drawings different in Figure 11 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-for die block, 203,11-pneumatic circuit, 204-electrically operated valve, 205-air inlet pipe, 206-drain pipe, 207 electronic liquid level gauges；4-humidity control system, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger, 404-water return pipeline.
Accompanying drawings different in Figure 12 is labeled as: 2-Auto-regulating System of Density of Heavy Medium system, 2-Auto-regulating System of Density of Heavy Medium system, 201-buoyant module, 202-compressor, 203-air bag, 204-drain pipe；4-humidity control system, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger, 404-water return pipeline.
Detailed description of the invention
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
This specification (include any accessory claim, summary) disclosed in any feature, unless specifically stated otherwise, all can by other equivalences or there is the alternative features of similar purpose replaced.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Embodiment 1
As shown in Fig. 1 and Figure 13, the sea bed gas hydrate harvester of the present invention, natural gas collecting hood 1 including lash ship 5 and interior sky, described lash ship 5 is provided with natural gas storage device 7 and for die block 202, described natural gas storage device 7 connects natural gas collecting hood 1 top by gas production pipe 12, described natural gas collecting hood 1 is connected to bottom lash ship 5 by marine riser 13, and described gas production pipe 12 is located in marine riser 13；Bottom described natural gas collecting hood 1, surrounding is provided with anchoring system 8, it is provided with pressure regulating system 3 in the bottom of natural gas collecting hood 1, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, and described natural gas collecting hood 1 outer wall is provided with propulsion system 6；It is provided with Auto-regulating System of Density of Heavy Medium system 2 in the sidewall of described natural gas collecting hood 1.Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；It is provided with some buoyant module 201 between the inside and outside layer housing arranged on described natural gas collecting hood 1, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, and described pneumatic circuit 203 is fixed on the shell of natural gas collecting hood 1 and through being connected to for die block 202 from marine riser 13.Wherein said humidity control system 4 includes ventilation channel 401, apparatus of oxygen supply 402 and heater 403, described apparatus of oxygen supply 402 is arranged on lash ship 5, described apparatus of oxygen supply 402 connects ventilation channel 401, it is internal that described ventilation channel 401 stretches into natural gas collecting hood 1 through marine riser 13, the part that described ventilation channel 401 is positioned within natural gas collecting hood 1 is arranged in the shape of a spiral, is wherein fixed with some heaters 403 on the spiral position of ventilation channel 401.Wherein said natural gas collecting hood 1 includes housing 101, top platform 102, baffle plate 103 and suspension ring 104, described housing 101 includes ectonexine housing, the described hollow pyramid structure of housing 101, the top of described housing 101 is set to top platform 102, the base of described housing 101 is sealedly connected with a circle ring baffle 103, in the middle part of the outer wall of described housing 101, is provided with some suspension ring 104.Wherein said anchoring system 8 is located at surrounding bottom natural gas collecting hood 1, described anchoring system 8 includes screw rod 801, motor 802, actuating device 803 and airtight anchoring shell, described anchoring shell is fixed on baffle plate 103 top, it is fixed with motor 802 in described anchoring shell, described motor 802 connects actuating device 803 and drives screw rod 801 rotary motion, and described screw rod 801 passes the bottom of anchoring shell.One end of wherein said gas production pipe 12 is positioned at top platform 102 and connects natural gas collecting hood 1 inside, and the other end is positioned on lash ship 5 and connects natural gas storage device 7；Wherein it is equipped with gas production pipe 12, pneumatic circuit 203, ventilation channel 401 and cable in marine riser 13.Wherein said pressure regulating system 3 is located at the bottom of natural gas collecting hood 1, described pressure regulating system 3 includes immersible pump 301 and suction box 302, it is internal that described suction box 302 is placed in natural gas collecting hood 1, described immersible pump 301 is fixed on natural gas collecting hood 1, described immersible pump 301 is by water supply hose connection suction box 302, and it is outside that described immersible pump 301 is communicated to natural gas collecting hood 1 by outlet pipe.The inner lower of wherein said natural gas collecting hood 1 is provided with agitation system 9, and described agitation system 9 includes driving 901 and water jet device 902, and housing 101 inwall is fixed in described driving 901, and described water jet device 902 is installed in driving 901 and can move by following vehicle.Wherein said propulsion system 6 includes carrying platform 601, screw propeller 602 and motor 603, and described carrying platform 601 is fixed on the outer middle side part of natural gas collecting hood 1, and motor 603 connects screw propeller 622 and is arranged on carrying platform 601.It is provided with monitoring system 10 in wherein said natural gas collecting hood 1, described monitoring system 10 includes temperature and pressure monitoring device and shell stress monitoring device, it is internal that described temperature and pressure monitoring device are arranged on top platform 102, and the housing 101 that some shell stress monitoring device is arranged on natural gas collecting hood 1 is outside；Described monitoring system 10, propulsion system 6, pressure regulating system 3, anchoring system 8, agitation system 9, humidity control system 4 and Auto-regulating System of Density of Heavy Medium system 2 are connected to control centre respectively through cable, and described control centre is located on lash ship 5.In the present invention, lash ship is operated across the sea for operator and controls.Natural gas collecting hood can cover on the seabed mud bed specifying region, and the seabed mud bed in this region is sealed, and the natural gas in this region is collected, and the natural gas storage device being sent on lash ship by Gas Exploitation air pipe is stored up.Marine riser is for being all placed in one gas production pipe, pneumatic circuit, ventilation channel and cable etc., it is to avoid the sea water corrosion to it, it is ensured that its life-span.Anchoring system is located at surrounding bottom natural gas collecting hood, can be sealingly fastened in by collecting hood on the mud bed of seabed, it is ensured that carry out leaking in natural gas collection process.Liquid in collecting hood can be discharged by pressure regulating system, makes to be formed in airtight collecting hood negative pressure, promotes the gas hydrate dissociation of seabed mud bed kind, be beneficial to the exploitation of sea bed gas hydrate；Humidity control system, it is mainly used for when in collecting hood, temperature value is relatively low, for increasing the temperature within natural gas collecting hood, thus improving the internal temperature of natural gas collecting hood, make the gas hydrate dissociation of seabed mud bed kind, be beneficial to the exploitation of sea bed gas hydrate.Agitation system then, being after specifying region to gather certain time, by agitation system, seabed mud bed being stirred, thus promoting the deep layer decomposition of hydrate of seabed mud bed.Propulsion system, when can be used for transferring to natural gas collecting hood appointment region, finely tunes collecting hood, to guarantee being accurately positioned of collecting hood.And Auto-regulating System of Density of Heavy Medium system, then it is that the density to natural gas collecting hood itself is adjusted, thus controlling raising and decentralizing of collecting hood.Wherein Auto-regulating System of Density of Heavy Medium system, by producing pressed gas for die block, and feeds pressed gas by pneumatic circuit in the casing of buoyant module, thus can be discharged by the water in casing, thus the density reducing collecting hood itself lifts up；Contrary to being collected when transferring of cover, the pressed gas discharge in control chamber body can be passed through, increase the density of collecting hood itself in sea water entrance casing, make collecting hood transfer to seabed mud bed.All buoyant module being located between the inside and outside layer housing of collecting hood, so that the more compact structure of collecting hood entirety is simpler, and collecting hood is not easily affected by and produces mobile, is more conducive to transport and preserves.The sea bed gas hydrate harvester of the present invention, mainly solve the gas hydrates of seabed mud bed, collect and in the process of exploitation decomposing, the loss of natural gas and the problem of leakage will not be formed, the present invention breaks through conventional thought pattern, utilize pressure to regulate formation negative pressure dexterously and humidity control system heats, promote the gas hydrate dissociation of seabed mud bed kind, it is beneficial to the exploitation of sea bed gas hydrate, then greatly improving the acquisition rate of natural gas, the exploitation for sea bed gas hydrate provides new direction；Visible, the present invention can pass through to density, pressure, temperature control to ensure steady production, natural gas collection is convenient, collecting efficiency height, can repeatedly use.
The sea bed gas hydrate acquisition method of the present invention, is realized by following steps:
Step one, lash ship 5 transport some natural gas collecting hoods 1 to specifying sea-bed area, control Auto-regulating System of Density of Heavy Medium system 2 to water-filling in buoyant module 201, control natural gas collecting hood 1 to transfer to, during close to precalculated position, starting propulsion system 6 and natural gas collecting hood 1 is carried out fine position；
After step 2, natural gas collecting hood 1 reach precalculated position, control ring baffle 103 and insert seabed mud bed, start anchoring system 5 and make screw rod 801 stretch in the mud bed of seabed, natural gas collecting hood 1 is fixed and seals；
Step 3, unlatching pressure regulating system 3, discharge the sea water within natural gas collecting hood 1, make natural gas collecting hood 1 be internally formed negative pressure and promote decomposition of hydrate, gas hydrates are collected by gas production pipe 12 and are processed to natural gas storage device 7 and store, monitoring system 10 monitors the change of natural gas collecting hood 1 internal pressure simultaneously, adjust the duty of pressure regulating system 3 in real time, it is ensured that the internal pressure of natural gas collecting hood 1 is stable；
Step 4, monitoring system 10 monitor natural gas collecting hood 1 internal temperature values, and detection temperature value and setting value are compared, if temperature value is relatively low, start-up temperature regulates system 4, and apparatus of oxygen supply 402 produces oxygen, by ventilation channel 401, oxygen is supplied to heater 403, control oxygen and natural gas and 403 react in heater, and produce heat improve natural gas collecting hood 1 internal temperature, when temperature value reaches preset value, control apparatus of oxygen supply 402 stop produce oxygen；
Step 5, when the gas hydrates in same appointment sea-bed area gathered after certain time, start agitation system 9, control water jet device 902 and be directed at seabed mud bed and spray High-Pressure Water, stir seabed mud bed and promote deep layer decomposition of hydrate；
Step 6, when specify sea-bed area natural gas extraction complete after, Auto-regulating System of Density of Heavy Medium system 2 is by supplying to buoyant module 201, reduce the global density of natural gas collecting hood 1, anchoring system 8 releases fixing, on natural gas collecting hood 1 and lift-off from the contacting of seabed mud bed, propulsion system 6 promotes natural gas collecting hood 1 to move to the next one and treats exploitation territory, repeats step one to step 5.
Embodiment 2
As shown in Fig. 2 and Figure 14, this embodiment is similar to embodiment 1, and it is different in that: the outer wall of described natural gas collecting hood 1 is provided with Auto-regulating System of Density of Heavy Medium system 2, and described Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；Wherein some buoyant module 201 are arranged on the outer wall of housing 101, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, and described pneumatic circuit 203 is fixed on the outer wall of housing 101 and through being connected to for die block 202 from marine riser 13.
Wherein said humidity control system 4 includes ventilation channel 401, apparatus of oxygen supply 402 and heater 403, described apparatus of oxygen supply 402 is arranged on lash ship 5, described apparatus of oxygen supply 402 connects ventilation channel 401, it is internal that described ventilation channel 401 stretches into natural gas collecting hood 1 through marine riser 13, the part that described ventilation channel 401 is positioned within natural gas collecting hood 1 is arranged in the shape of a spiral, is wherein fixed with some heaters 403 on the spiral position of ventilation channel 401.
Auto-regulating System of Density of Heavy Medium system in this embodiment, by producing pressed gas for die block, and feeds pressed gas by pneumatic circuit in the casing of buoyant module, thus can be discharged by the water in casing, thus the density reducing collecting hood itself lifts up；Contrary to being collected when transferring of cover, the pressed gas discharge in control chamber body can be passed through, increase the density of collecting hood itself in sea water entrance casing, make collecting hood transfer to seabed mud bed.All buoyant module are located on collecting hood outer wall so that buoyant module is easily installed and fixes, and collecting hood is not easily affected by equally and produces mobile, be more conducive to transport and preserve；It addition, all buoyant module are located on collecting hood outer wall, make that buoyant module is passed through buoyancy the impact of collecting hood and control is more accurate.
Embodiment 3
As shown in Fig. 3 and Figure 15, this embodiment is similar to embodiment 1, it is different in that: the disposed outside of described natural gas collecting hood 1 has some suspension ring 104, described suspension ring 104 are connected to Auto-regulating System of Density of Heavy Medium system 2 by hawser, described Auto-regulating System of Density of Heavy Medium system 2 includes the some buoyant module 201 being positioned at outside natural gas collecting hood 1, described buoyant module 201 is the interior empty van body sealed, the bottom of described buoyant module 201 is provided with link, it is connected by hawser between described link with suspension ring 104, the top of described buoyant module 201 is communicated with the drain pipe 204 inside and outside buoyant module 201, described buoyant module 201 is internal is provided with air bag 203, described air bag 203 is connected to can on the compressor 202 of remote wireless controlled.
Wherein said humidity control system 4 includes ventilation channel 401, apparatus of oxygen supply 402 and heater 403, described apparatus of oxygen supply 402 is arranged on lash ship 5, described apparatus of oxygen supply 402 connects ventilation channel 401, it is internal that described ventilation channel 401 stretches into natural gas collecting hood 1 through marine riser 13, the part that described ventilation channel 401 is positioned within natural gas collecting hood 1 is arranged in the shape of a spiral, is wherein fixed with some heaters 403 on the spiral position of ventilation channel 401.The some buoyant module connected by hawser outside natural gas collecting hood, the volume and weight of natural gas collecting hood can be reduced, produce and cost of transportation thus lowering it, and by the mode of outer company, buoyant module is attached, being more conducive to the monitoring to buoyant module and management, wherein the density of whole natural gas collecting hood is controlled by air bag size, when air bag increases, water in casing is discharged density and reduces, thus the density reducing collecting hood itself lifts up；And when air bag reduces, water externally enters box house density from casing and increases, collecting hood is made to transfer to seabed mud bed；The size of air bag is then by compressor control, and compressor is then by long-range wireless operated so that control enhanced convenience quick.
The sea bed gas hydrate acquisition method of the present invention, is realized by following steps:
Step one, lash ship 5 transport some natural gas collecting hoods 1 to specifying sea-bed area, the air bag 203 controlled in Auto-regulating System of Density of Heavy Medium system 2 reduces, make water-filling in buoyant module 201, control natural gas collecting hood 1 to transfer to, during close to precalculated position, starting propulsion system 6 and natural gas collecting hood 1 is carried out fine position；
After step 2, natural gas collecting hood 1 reach precalculated position, control ring baffle 103 and insert seabed mud bed, start anchoring system 5 and make screw rod 801 stretch in the mud bed of seabed, natural gas collecting hood 1 is fixed and seals；
Step 3, unlatching pressure regulating system 3, discharge the sea water within natural gas collecting hood 1, make natural gas collecting hood 1 be internally formed negative pressure and promote decomposition of hydrate, gas hydrates are collected by gas production pipe 12 and are processed to natural gas storage device 7 and store, monitoring system 10 monitors the change of natural gas collecting hood 1 internal pressure simultaneously, adjust the duty of pressure regulating system 3 in real time, it is ensured that the internal pressure of natural gas collecting hood 1 is stable；
Step 4, monitoring system 10 monitor natural gas collecting hood 1 internal temperature values, and detection temperature value and setting value are compared, if temperature value is relatively low, start-up temperature regulates system 4, and apparatus of oxygen supply 402 produces oxygen, by ventilation channel 401, oxygen is supplied to heater 403, control oxygen and natural gas and 403 react in heater, and produce heat improve natural gas collecting hood 1 internal temperature, when temperature value reaches preset value, control apparatus of oxygen supply 402 stop produce oxygen；
Step 5, when the gas hydrates in same appointment sea-bed area gathered after certain time, start agitation system 9, control water jet device 902 and be directed at seabed mud bed and spray High-Pressure Water, stir seabed mud bed and promote deep water compound to divide；
Step 6, when specify sea-bed area natural gas extraction complete after, Auto-regulating System of Density of Heavy Medium system 2 is supplied in air bag 203 by compressor 202, the water in buoyant module 201 is made to discharge, reduce the global density of natural gas collecting hood 1, anchoring system 8 releases fixing, on natural gas collecting hood 1 and lift-off from the contacting of seabed mud bed, propulsion system 6 promotes natural gas collecting hood 1 to move to the next one and treats exploitation territory, repeats step 2 to step 6.
Embodiment 4
As shown in fig. 4 and 13, this embodiment is similar to embodiment 1, it is different in that: be provided with Auto-regulating System of Density of Heavy Medium system 2 in the sidewall of described natural gas collecting hood 1, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heater 401 and support 402, some supports 402 side by side it are provided with in described natural gas collecting hood 1, wherein said support 402 is fixed with some heaters 401, described heater 401 is connected on cable, described cable is connected to the control centre on lash ship 5 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；It is provided with some buoyant module 201 between the inside and outside layer housing arranged on described natural gas collecting hood 1, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, described pneumatic circuit 203 is fixed on the shell of natural gas collecting hood 1 and passes from marine riser 13 and is connected to for die block 202, and described confession die block 202 is located on lash ship 5.All buoyant module being located between the inside and outside layer housing of collecting hood, so that the more compact structure of collecting hood entirety is simpler, and collecting hood is not easily affected by and produces mobile, is more conducive to transport and preserves.Wherein arranging some supports side by side in natural gas collecting hood, these supports are mounted and are fixed on the inwall of collecting hood, make the connection more temperature of collecting hood lean on；Still further aspect support is arranged side by side in collecting hood, collecting hood is made to be evenly equipped with support in the vertical, and each support is designed with heater, and when collecting case temperature and being too low, can by electrically heated mode to being heated in collecting hood, and make the homogeneous temperature within collecting hood, thus avoiding local temperature in collecting hood too high, forming the bigger temperature difference, causing natural gas instantaneous expansion pressure moment to increase, and the peril brought, it is ensured that production safety.And be controlled by cable by the control centre on lash ship so that control more convenient reliably, operate easier.
Embodiment 5
As indicated in figure 5 and figure 14, this embodiment is similar to embodiment 2, it is different in that: the outer wall of described natural gas collecting hood 1 is provided with Auto-regulating System of Density of Heavy Medium system 2, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heater 401 and support 402, some supports 402 side by side it are provided with in described housing 101, wherein said support 402 is fixed with some heaters 401, described heater 401 is connected on cable, and described cable is connected to the control centre on lash ship 5 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；Wherein some buoyant module 201 are arranged on the outer wall of housing 101, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, and described pneumatic circuit 203 is fixed on the outer wall of housing 101 and through being connected to for die block 202 from marine riser 13.
Embodiment 6
As shown in Figure 6 and Figure 15, shown in this embodiment and embodiment 3, it is different in that: be provided with some suspension ring 104 on the outer wall of described natural gas collecting hood 1, described suspension ring 104 are connected to Auto-regulating System of Density of Heavy Medium system 2 by hawser, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heater 401 and support 402, some supports 402 side by side it are provided with in described housing 101, wherein said support 402 is fixed with some heaters 401, described heater 401 is connected on cable, described cable is connected to the control centre on lash ship 5 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes the some buoyant module 201 being positioned at outside natural gas collecting hood 1, described buoyant module 201 is the interior empty van body sealed, the bottom of described buoyant module 201 is provided with link, it is connected by hawser between described link with suspension ring 104, the top of described buoyant module 201 is communicated with the drain pipe 204 inside and outside buoyant module 201, described buoyant module 201 is internal is provided with air bag 203, and described air bag 203 is connected to can on the compressor 202 of remote wireless controlled.
Embodiment 7
As shown in figs. 7 and 13, this embodiment and embodiment 1, 4 is similar, it is distinguished by: be provided with Auto-regulating System of Density of Heavy Medium system 2 in the sidewall of described natural gas collecting hood 1, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heating plant 402, heat supplying pipeline 401 and heat exchanger 403, described lash ship 5 is provided with mean for thermal 402, described heating plant 402 is connected to heat supplying pipeline 401, described heat supplying pipeline 401 is connected to the heat exchanger 403 in natural gas collecting hood 1 through marine riser 13, wherein some heat exchangers 403 are fixed on the inwall of natural gas collecting hood 1, and be connected with heat supplying pipeline 401 by valve.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；It is provided with some buoyant module 201 between the inside and outside layer housing arranged on described natural gas collecting hood 1, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, described pneumatic circuit 203 is fixed on the shell of natural gas collecting hood 1 and passes from marine riser 13 and is connected to for die block 202, and described confession die block 202 is located on lash ship 5.
Embodiment 8
As shown in Fig. 8 and Figure 14, this embodiment and embodiment 2, 5 is similar, it is distinguished by: be provided with Auto-regulating System of Density of Heavy Medium system 2 in the sidewall of described natural gas collecting hood 1, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heating plant 402, heat supplying pipeline 401 and heat exchanger 403, described lash ship 5 is provided with mean for thermal 402, described heating plant 402 is connected to heat supplying pipeline 401, described heat supplying pipeline 401 is connected to the heat exchanger 403 in natural gas collecting hood 1 through marine riser 13, wherein some heat exchangers 403 are fixed on the inwall of natural gas collecting hood 1, and be connected with heat supplying pipeline 401 by valve.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；It is provided with some buoyant module 201 between the inside and outside layer housing arranged on described natural gas collecting hood 1, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, described pneumatic circuit 203 is fixed on the shell of natural gas collecting hood 1 and passes from marine riser 13 and is connected to for die block 202, and described confession die block 202 is located on lash ship 5.
Embodiment 9
As shown in Fig. 9 and Figure 15, this embodiment and embodiment 3, 6 is similar, it is different in that: be provided with some suspension ring 104 on the outside of described natural gas collecting hood 1, described suspension ring 104 are connected to Auto-regulating System of Density of Heavy Medium system 2 by hawser, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heating plant 402, heat supplying pipeline 401 and heat exchanger 403, described lash ship 5 is provided with mean for thermal 402, described heating plant 402 is connected to heat supplying pipeline 401, described heat supplying pipeline 401 is connected through marine riser 13 with the heat exchanger 403 in natural gas collecting hood 1, wherein some heat exchangers 403 are fixed on the inwall of housing 101, and be connected with heat supplying pipeline 401 by valve.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes the some buoyant module 201 being positioned at outside natural gas collecting hood 1, described buoyant module 201 is the interior empty van body sealed, the bottom of described buoyant module 201 is provided with link, it is connected by hawser between described link with suspension ring 104, the top of described buoyant module 201 is communicated with the drain pipe 204 inside and outside buoyant module 201, described buoyant module 201 is internal is provided with air bag 203, and described air bag 203 is connected to can on the compressor 202 of remote wireless controlled.
Embodiment 10
As shown in Figure 10 and 13, this embodiment and embodiment 1, 4, 7 is similar, it is different in that: be provided with Auto-regulating System of Density of Heavy Medium system 2 in the sidewall of described natural gas collecting hood 1, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heating plant 402, heat supplying pipeline 401, heat exchanger 403 and water return pipeline 404, described lash ship 5 is provided with mean for thermal 402, described heating plant 402 is connected to heat supplying pipeline 401, described heat supplying pipeline 401 is internal through marine riser 13 to natural gas collecting hood 1, some branch lines being connected with heat supplying pipeline 401 it are provided with in described natural gas collecting hood 1, described branch line is provided with some heat exchangers 403；Described branch line is the frame structure identical with natural gas collecting hood 1 shape, and described branch line connects back to water lines 404, and described water return pipeline 404 is connected on lash ship 5 heating plant 402 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；It is provided with some buoyant module 201 between the inside and outside layer housing arranged on described natural gas collecting hood 1, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, described pneumatic circuit 203 is fixed on the shell of natural gas collecting hood 1 and passes from marine riser 13 and is connected to for die block 202, and described confession die block 202 is located on lash ship 5.
Embodiment 11
As shown in Figure 11 and Figure 14, this embodiment and embodiment 2, 5, 8 is similar, it is different in that: the outer wall of described natural gas collecting hood 1 is provided with Auto-regulating System of Density of Heavy Medium system 2, described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9, described humidity control system 4 includes heating plant 402, heat supplying pipeline 401, heat exchanger 403 and water return pipeline 404, described lash ship 5 is provided with mean for thermal 402, described heating plant 402 is connected to heat supplying pipeline 401, described heat supplying pipeline 401 is internal through marine riser 13 to natural gas collecting hood 1, some branch lines being connected with heat supplying pipeline 401 it are provided with in described natural gas collecting hood 1, described branch line is provided with some heat exchangers 403；Described branch line is the frame structure identical with natural gas collecting hood 1 shape, and described branch line connects back to water lines 404, and described water return pipeline 404 is connected on lash ship 5 heating plant 402 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；Wherein some buoyant module 201 are arranged on the outer wall of housing 101, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, and described pneumatic circuit 203 is fixed on the outer wall of housing 101 and through being connected to for die block 202 from marine riser 13.
Embodiment 12
nullSuch as Figure 12 and Figure 15，This embodiment and embodiment 3、6、9 is similar，It is different in that: be provided with some suspension ring 104 on the outside of described natural gas collecting hood 1，Described suspension ring 104 are connected to Auto-regulating System of Density of Heavy Medium system 2 by hawser，Described natural gas collecting hood 1 is internal is provided with humidity control system 4 and agitation system 9，Described humidity control system 4 includes heating plant 402、Heat supplying pipeline 401、Heat exchanger 403 and water return pipeline 404，Described lash ship 5 is provided with mean for thermal 402，Described heating plant 402 is connected to heat supplying pipeline 401，Described heat supplying pipeline 401 is internal through marine riser 13 to natural gas collecting hood 1，Some branch lines being connected with heat supplying pipeline 401 it are provided with in described natural gas collecting hood 1，Described branch line is provided with some heat exchangers 403；Described branch line is the frame structure identical with natural gas collecting hood 1 shape, and described branch line connects back to water lines 404, and described water return pipeline 404 is connected on lash ship 5 heating plant 402 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, supplies die block 202 and pneumatic circuit 203；Wherein some buoyant module 201 are arranged on the outer wall of housing 101, described buoyant module 201 includes the interior empty van body sealed, electronic liquid level gauge 207 is set in described casing, described casing is communicated with inside and outside drain pipe 206 and air inlet pipe 205, the air inlet pipe 205 of all buoyant module 201 is parallel on pneumatic circuit 203, described pneumatic circuit 203 is fixed on the outer wall of housing 101 and passes from marine riser 13 and is connected to for die block 202, and described confession die block 202 is located on lash ship 5.
Wherein said natural gas collecting hood 1 includes housing 101, top platform 102, baffle plate 103 and suspension ring 104, described housing 101 includes ectonexine housing, the described hollow pyramid structure of housing 101, the top of described housing 101 is set to top platform 102, the base of described housing 101 is sealedly connected with a circle ring baffle 103, being provided with some suspension ring 104 in the middle part of the outer wall of described housing 101, described branch line is pyramid frame structure in housing 101.
Based on the principle of above-described embodiment, all parts therein can be carried out similar change or combination or superposition, thus similar technical scheme can be obtained, solve the technical problem of the present invention.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any new feature disclosed in this manual or any new combination, and the step of the arbitrary new method disclosed or process or any new combination.
Claims (10)
1. a sea bed gas hydrate harvester, it is characterized in that: include the natural gas collecting hood of interior sky, bottom described natural gas collecting hood, surrounding is provided with anchoring system, it is provided with pressure regulating system in the bottom of natural gas collecting hood, described natural gas collecting hood is configured with Auto-regulating System of Density of Heavy Medium system, it is provided with humidity control system and agitation system inside described natural gas collecting hood, described natural gas collecting hood outer wall is provided with propulsion system, described natural gas collecting hood is connected to bottom lash ship by marine riser, it is equipped with gas production pipe in described marine riser, described natural gas collecting hood top is connected to natural gas storage device by gas production pipe, described natural gas storage device is located on lash ship.
2. sea bed gas hydrate harvester as claimed in claim 1, it is characterized in that: described natural gas collecting hood includes housing, top platform, baffle plate and suspension ring, described housing is the pyramid structure of interior sky, the top of described housing is set to top platform, and the bottom sides of described housing is connected with a circle ring baffle.
3. sea bed gas hydrate harvester as claimed in claim 2, it is characterised in that: described Auto-regulating System of Density of Heavy Medium system includes buoyant module, supplies the gentle pressure pipe road of die block；Described lash ship is provided with mean for die block；The described hollow pyramid structure of natural gas collecting hood, it is provided with some buoyant module between the inner and outer shell of described natural gas collecting hood, described buoyant module includes the interior empty van body sealed, electronic liquid level gauge is set in described casing, described casing is communicated with inside and outside drain pipe and air inlet pipe, all air inlet pipe are parallel on pneumatic circuit, and described pneumatic circuit is fixed on the shell of housing and through being connected to for die block from marine riser；Or described Auto-regulating System of Density of Heavy Medium system includes buoyant module, for the gentle pressure pipe road of die block；Described lash ship is provided with mean for die block；The described hollow pyramid structure of natural gas collecting hood, the outer wall of described natural gas collecting hood is provided with some buoyant module, described buoyant module includes the interior empty van body sealed, electronic liquid level gauge is set in described casing, described casing is communicated with inside and outside drain pipe and air inlet pipe, all air inlet pipe are parallel on pneumatic circuit, and described pneumatic circuit is fixed on the outer wall of housing and through being connected to for die block from marine riser；Or described Auto-regulating System of Density of Heavy Medium system is located at the some buoyant module outside natural gas collecting hood, described buoyant module is connected on the suspension ring of natural gas collecting hood outer wall by hawser, described buoyant module is the interior empty van body sealed, the bottom of described buoyant module is provided with link, the top of described buoyant module is communicated with the drain pipe inside and outside buoyant module, and being provided with inside described buoyant module can the compressor of remote wireless controlled and the air bag that is connected with compressor.
4. sea bed gas hydrate harvester as claimed in claim 3, it is characterized in that: described humidity control system includes ventilation channel, apparatus of oxygen supply and heater, described apparatus of oxygen supply is arranged on lash ship, described apparatus of oxygen supply is connected to ventilation channel, described ventilation channel is connected to inside natural gas collecting hood through marine riser, the part that described ventilation channel is positioned within natural gas collecting hood is arranged in the shape of a spiral, and wherein some heaters are fixed on the spiral position of ventilation channel；
Or described humidity control system includes heater and support, some supports side by side it are provided with in described natural gas collecting hood, any of which support is respectively and fixedly provided with some heaters, described heater is connected on cable, and described cable is connected to the control centre of lash ship through marine riser；Or described humidity control system includes heating plant, heat supplying pipeline and heat exchanger, described lash ship is provided with mean for thermal, described heating plant is connected to heat supplying pipeline, described heat supplying pipeline is connected through marine riser with the heat exchanger in housing, wherein some heat exchangers are fixed on the inwall of housing, and are connected with heat supplying pipeline by valve；Or described humidity control system includes heating plant, heat supplying pipeline, heat exchanger and water return pipeline, described lash ship is provided with mean for thermal, described heating plant is connected to heat supplying pipeline, described heat supplying pipeline traverse marine riser is to natural gas collecting hood, being provided with some branch lines being connected with heat supplying pipeline in described natural gas collecting hood, described branch line is provided with some heat exchangers；Described branch line is the frame structure identical with natural gas collecting hood shape, and described branch line connects back to water lines, and described water return pipeline is connected on lash ship heating plant through marine riser；Or described humidity control system includes apparatus of oxygen supply, ventilation channel and oxygen heater, described lash ship is provided with apparatus of oxygen supply, being connected to ventilation channel on described apparatus of oxygen supply, described ventilation channel is connected to enclosure interior through marine riser, and described marine riser is connected with oxygen heater.
5. the sea bed gas hydrate harvester as described in one of Claims 1-4, it is characterized in that: described pressure regulating system is located at the bottom of natural gas collecting hood, described pressure regulating system includes immersible pump and suction box, described immersible pump connects the suction box within natural gas collecting hood by water supply hose, and described immersible pump is by outside outlet pipe connection natural gas collecting hood.
6. the sea bed gas hydrate harvester as described in one of Claims 1-4, it is characterized in that: described anchoring system is located at surrounding bottom natural gas collecting hood, described anchoring system includes screw rod, motor, actuating device and airtight anchoring shell, described anchoring shell is fixed on baffle plate top, it is fixed with motor in described anchoring shell, described motor connects actuating device and drives screw rod rotary motion, and described screw rod passes the bottom of anchoring shell.
7. the sea bed gas hydrate harvester as described in one of Claims 1-4, it is characterized in that: the inner lower of described natural gas collecting hood is provided with agitation system, described agitation system includes driving and water jet device, inner walls is fixed in described driving, and described water jet device is installed on driving upper energy following vehicle and moves.
8. the sea bed gas hydrate harvester as described in one of Claims 1-4, it is characterised in that: it is equipped with gas production pipe, pneumatic circuit, ventilation channel and cable in described marine riser；Wherein one end of gas production pipe is positioned at natural gas collecting hood top platform, and inside connection natural gas collecting hood, the other end is positioned on lash ship and connects natural gas storage device.
9. the sea bed gas hydrate harvester as described in one of Claims 1-4, it is characterized in that:, described propulsion system includes carrying platform, screw propeller and motor, described carrying platform is fixed on the outer middle side part of natural gas collecting hood, and motor connects screw propeller and is arranged on carrying platform.
10. the sea bed gas hydrate harvester as described in one of Claims 1-4, it is characterized in that: in natural gas collecting hood, be provided with monitoring system, the described temperature that includes monitors device with pressure monitoring device and shell stress, described temperature and pressure monitoring device are arranged on inside natural gas collecting hood top platform, and some shell stress monitoring device is arranged on the hull outside of natural gas collecting hood；Described monitoring system, propulsion system, pressure regulating system, anchoring system, agitation system, humidity control system and Auto-regulating System of Density of Heavy Medium system are connected to control centre respectively through cable, and described control centre is located on lash ship.
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| CN201610170980.9A CN105781497B (en) | 2016-03-24 | 2016-03-24 | Seabed natural gas hydrate collection system |
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| CN105781497B (en) | 2020-07-24 |
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