CN105863575A - Seabed natural gas collecting device and method with built-in buoyancy tanks and hot water pipelines for heating - Google Patents
Seabed natural gas collecting device and method with built-in buoyancy tanks and hot water pipelines for heating Download PDFInfo
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- CN105863575A CN105863575A CN201610170986.6A CN201610170986A CN105863575A CN 105863575 A CN105863575 A CN 105863575A CN 201610170986 A CN201610170986 A CN 201610170986A CN 105863575 A CN105863575 A CN 105863575A
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- natural gas
- collecting hood
- gas collecting
- sea
- hot water
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Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Abstract
The invention discloses a seabed natural gas collecting device and method with built-in buoyancy tanks and hot water pipelines for heating, and belongs to the technical field of natural gas collection. The seabed natural gas collecting device comprises a primary boat and a hollow natural gas collecting hood, wherein a natural gas collecting and storing device is arranged on the primary boat and connected to the top of the natural gas collecting hood by a gas collecting pipeline; the natural gas collecting hood is connected to the bottom of the primary boat by a water isolating pipe; a gas collecting pipeline is arranged in the water isolating pipe; anchoring systems are arranged around the bottom of the natural gas collecting hood; pressure adjusting systems are arranged on the bottom of the natural gas collecting hood; propelling systems are arranged on the outer wall of the natural gas collecting hood; a density adjusting system is arranged on the side wall of the natural gas collecting hood; and a temperature adjusting system and a stirring system are arranged in the natural gas collecting hood. According to the seabed natural gas collecting device and method, the problem that for natural gas hydrate in seabed mud bed, natural gas escape and leakage are caused in the decomposing collection and exploiting processes is mainly solved.
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 knot that methane gas is formed with water molecules under the cryogenic high pressure environment in seabed
Crystal, is the clean energy resource that a kind of reserves are huge, is hopeful petroleum replacing, coal becomes main energy sources.Gas hydrates are wide
General it is distributed in submarine sedimentary strata, there is reserves cementing, the feature of poor stability big, weak, the once temperature of region, pressure strip
Part changes, it is possible to causes a large amount of decomposition, the gasification of sea bed gas hydrate and freely discharges.
Owing to gas hydrates main decomposition is methane gas and water, but methane gas is greenhouse gases, releases in a large number
It is put in air and can cause greenhouse effect, environment is done great damage.How to ensure the gas hydrates in exploitation seabed
During natural gas do not reveal, not loss and the most high efficiency decomposition gas hydrates, be all current sea-bottom natural gas
The main direction of studying of hydrate mineral reserve exploitation.
In existing exploitation of gas hydrates technology, generally by voltage drop method, heat injection method or note chemical-agent technique etc., will
The Gas Hydrate of seabed tool is converted into gas and water, is collected the gas obtained after converting, then by under water
Production facility or floating production facility produce, and there is presently no the exploitation way of the sea bed gas hydrate of a kind of maturation
And system formally puts 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 the most more complicated, and cost is high, and lacks controllability and operability, holds
Easily causing the leakage of 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 green ring
Protect, 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: for the problem of above-mentioned existence, it is provided that a kind of built-in buoyancy tank circulating hot water pipeline
Heating sea-bottom natural gas collection device and method, mainly solve the gas hydrates of seabed mud bed, decompose collect and
During exploitation, will not form the loss of natural gas and the problem of leakage, the present invention breaks through conventional thought pattern, ingenious land productivity
Form negative pressure with pressure regulation 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, the most greatly improves the acquisition rate of natural gas, for the exploitation of sea bed gas hydrate
New direction is provided；Visible, the present invention can by density, pressure, temperature control to ensure steady production, natural gas collection side
Just, collecting efficiency high, can repeatedly use.
The technical solution used in the present invention is as follows:
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, natural including lash ship and interior sky
Gas collecting hood, described lash ship is provided with natural gas storage device, and described natural gas storage device connects natural by gas production pipe
Gas collecting hood top, described natural gas collecting hood is connected to bottom lash ship by marine riser, and described gas production pipe is located at marine riser
In；Bottom described natural gas collecting hood, surrounding is disposed with anchoring system, is provided with pressure regulation in the bottom of natural gas collecting hood and is
System, described natural gas collecting hood outer wall is provided with propulsion system, is provided with Auto-regulating System of Density of Heavy Medium system in the sidewall of described natural gas collecting hood
System, is provided with humidity control system and agitation system inside described natural gas collecting hood, described humidity control system includes for hot charging
Put, heat supplying pipeline, heat exchanger and water return pipeline, described lash ship is provided with heating plant, and described heating plant connects confession
Pipe line, described heat supplying pipeline through marine riser to inside natural gas collecting hood, be provided with in described natural gas collecting hood some with
The branch line that heat supplying pipeline is connected, described branch line is provided with some heat exchangers；Described branch line is with natural
The frame structure that gas collecting hood shape is identical, described branch line connects back to water lines, and described water return pipeline is through marine riser even
It is connected to heating plant on lash ship.
Due to said structure, lash ship operates 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 carried out
Collect, and the natural gas storage device being sent on lash ship by Gas Exploitation air pipe is stored up.Marine riser will be for adopting
Air pipe, pneumatic circuit, ventilation channel and cable etc. are all placed in one, it is to avoid the sea water corrosion to it, it is ensured that its life-span.Anchor
Determine system and be located at surrounding bottom natural gas collecting hood, collecting hood can be sealingly fastened on the mud bed of seabed, it is ensured that carry out natural gas
Leak during collection.Liquid in collecting hood can be discharged by pressure regulating system, is formed negative in making airtight collecting hood
Pressure, promotes the gas hydrate dissociation of seabed mud bed kind, the beneficially exploitation of sea bed gas hydrate.Agitation system then,
It is after specifying region to gather certain time, by agitation system, seabed mud bed is stirred, thus promote seabed mud
The deep layer decomposition of hydrate of bed.Propulsion system, when can be used for transferring to natural gas collecting hood specify region, is carried out collecting hood
Fine setting, 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
Joint, thus control raising and decentralizing of collecting hood.All buoyant module are 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 difficult to be affected by and produces movement, is more conducive to fortune
Defeated and preserve.Wherein humidity control system is mainly used in being adjusted the temperature within collecting hood, when in natural gas collecting hood
When the temperature in portion is too low, available heating plant, by heat supplying pipeline supplying hot water in natural gas collecting hood, makes the energy of hot water
It is transferred in the heat supplying pipeline in natural gas collecting hood, through being further separated into each branched pipe after hot water reaches natural gas collecting hood
Lu Zhong, enters back in heat exchanger, and the heat of hot water is discharged in natural gas collecting hood by heat exchanger, thus improves
Temperature in natural gas collecting hood, it is ensured that natural gas collects operation normally, the hot water after heat exchange returns through water return pipeline
It is back to heating plant, thus it is reusable to form circulation.Wherein branch line is the frame identical with natural gas collecting hood shape
Shelf structure, the heat energy distribution making whole collecting hood and inside thereof is uniform, thus in avoiding collecting hood, local temperature is too high, is formed relatively
The big temperature difference, causes natural gas instantaneous expansion pressure moment to increase, and the peril brought, it is ensured that production safety.The present invention
Built-in buoyancy tank circulating hot water pipeline heating sea-bottom natural gas collection device, mainly solve seabed mud bed natural gas hydration
Thing, collects decomposing and during exploitation, will not form the loss of natural gas and the problem of leakage, and the present invention breaks through conventional think of
Dimensional pattern, utilizes pressure regulation to form negative pressure dexterously and humidity control system heats, promote the natural gas of seabed mud bed kind
The exploitation of decomposition of hydrate, beneficially sea bed gas hydrate, the most greatly improves the acquisition rate of natural gas, natural for seabed
The exploitation of gas hydrate provides new direction；Visible, the present invention can be by stablizing raw to density, pressure, the control of temperature with guarantee
Producing, natural gas collection is convenient, collecting efficiency is high, can repeatedly use.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, described Auto-regulating System of Density of Heavy Medium system
Including buoyant module, for die block gentle pressure pipe road；If being disposed with between the inside and outside layer housing arranged on described natural gas collecting hood
Dry buoyant module, described buoyant module includes the interior empty van body sealed, sets electronic liquid level gauge, described casing sets in described casing
The drain pipe inside and outside connection and air inlet pipe, the air inlet pipe of all buoyant module is had to be parallel on pneumatic circuit, described pneumatic circuit
Being fixed on the shell of natural gas collecting hood and through being connected to confession die block from marine riser, described confession die block is located at lash ship
On.
Due to said structure, Auto-regulating System of Density of Heavy Medium system is by producing pressed gas for die block, and passes through pneumatic circuit to floating
Feed pressed gas in the casing of power module, thus the water in casing can be discharged, thus the density reducing collecting hood itself is entered
Carry on row；On the contrary being collected when transferring of cover, can be discharged by the pressed gas in control chamber body, sea water enters in casing
Increase the density of collecting hood itself, make collecting hood transfer to seabed mud bed.All buoyant module are located at the inside and outside layer of collecting hood
Between housing, so that the more compact structure of collecting hood entirety is simpler, and collecting hood is difficult to be affected by and produce
Mobile, it is more conducive to transport and preserves.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, described natural gas collecting hood
Including housing, top platform, baffle plate and suspension ring, described housing includes ectonexine housing, the hollow pyramid of described housing
Structure, the top of described housing is set to top platform, and the base of described housing is sealedly connected with a circle ring baffle, described shell
Be provided with some suspension ring in the middle part of the outer wall of body, described branch line in housing in pyramid frame structure.
Due to said structure, the housing of the pyramid structure of interior sky, make housing be easy to manufacture, and structure more may be used
Leaning on, more conducively natural gas concentrates on the inner top of housing, it is simple to the collection of weather.Can be used for arranging buoyancy between ectonexine housing
Module, so that whole collecting hood more compact structure；Top platform is used for connecting marine riser, it is simple between lash ship and collecting hood
It is attached.The ring baffle on the base of housing, can will seal with seabed mud bed bottom collecting hood, thus can ensure that collection
Form negative pressure in cover, promote the gas hydrate dissociation of seabed mud bed kind, the beneficially exploitation of sea bed gas hydrate.Hang
Ring, on the one hand can be used for lifting by crane collecting hood, on the other hand can be used for connecting floating buoyant module, improves collecting hood
The control ability of buoyancy.Wherein said branch line in housing in pyramid frame structure so that it is can collect with natural gas
The inner-cavity structure of cover matches, and when heating in natural gas collecting hood, can make the heat energy of whole collecting hood and inside thereof
It is evenly distributed, thus in avoiding collecting hood, local temperature is too high, form the bigger temperature difference, cause natural gas instantaneous expansion pressure wink
Between increase, and the peril brought, it is ensured that production safety.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating 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, is fixed with motor in described anchoring shell, and described motor connects actuating device and drives spiral shell
Bar rotary motion, described screw rod passes the bottom of anchoring shell.
Due to said structure, available motor controls screw rod by actuating device, is extend into by screw rod in the mud bed of seabed,
Collecting hood is fixed on the mud bed of seabed, it is ensured that the sealing of collecting hood and stability, it is to avoid environments such as subsea factor is to collecting hood
Impact, thus can be effectively prevented from decompose collect and exploitation during, the loss of natural gas and the problem of leakage.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, the one of described gas production pipe
End is positioned at top platform and connects inside natural gas collecting hood, and the other end is positioned on lash ship connection natural gas storage device；Wherein
Gas production pipe, pneumatic circuit, ventilation channel and cable it is equipped with in marine riser.
Due to said structure, gas production pipe is mainly used in connecting natural gas collecting hood and natural gas storage device, can will receive
The natural gas collected in collection cover, through gas production pipe by natural gas transmission to natural gas storage device.Wherein marine riser can be used for by
The pipeline being connected between lash ship with collecting hood and cable etc., protect pipeline and cable so that it is the life-span more lengthens effectively
For a long time.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, described pressure regulating system
Being located at the bottom of natural gas collecting hood, described pressure regulating system includes that immersible pump and suction box, described suction box are placed in natural
Inside gas collecting hood, described immersible pump is fixed on natural gas collecting hood, and described immersible pump connects suction box by water supply hose,
Described immersible pump is communicated to outside natural gas collecting hood by outlet pipe.
Due to said structure, this pressure regulating system can pass through suction box, and the sea water within collecting hood is soft by water inlet
Pipe and immersible pump are expelled to outside collecting hood, so that collecting hood is internally formed negative pressure, are more conducive to promote the sky of seabed mud bed kind
So gas hydrate decomposes, and the beneficially exploitation of sea bed gas hydrate the most greatly improves the acquisition rate of natural gas；Press simultaneously
Draught control system also ensures that the internal pressure of natural gas collecting hood is stable.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, described natural gas collecting hood
Inner lower be provided with agitation system, described agitation system include driving and water jet device, described driving is fixed in housing
Wall, described water jet device is installed on driving upper energy following vehicle and moves.
Due to said structure, after the gas hydrates in same appointment sea-bed area gather certain time, startup is stirred
Dynamic system, controls water jet device alignment seabed mud bed and sprays High-Pressure Water, and agitation seabed mud bed promotes deep water compound to divide
Solve, the beneficially exploitation of sea bed gas hydrate, the most greatly improve the acquisition rate of natural gas.
The sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, described propulsion system includes
Having carrying platform, screw propeller and motor, described carrying platform to be fixed on the outer middle side part of natural gas collecting hood, motor connects
Screw propeller is arranged on carrying platform.
Due to said structure, when collecting hood is transferred to during close to precalculated position, propulsion system can be started natural gas is collected
Cover carries 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-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, described natural gas collecting hood
Inside being provided with monitoring system, described monitoring system includes temperature and pressure monitoring device and shell stress monitoring device, described temperature
Being arranged on inside top platform with pressure monitoring device, some shell stress monitoring devices are arranged on the housing of natural gas collecting hood
Outside；Described monitoring system, propulsion system, pressure regulating system, anchoring system, agitation system and Auto-regulating System of Density of Heavy Medium system are led to respectively
Cross cable and be connected to control centre.
Due to said structure, the force value in monitoring system can monitor collecting hood with implementing and on collecting hood, temperature value, from
And 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 operation safety
Reliably；Or the too low collection that can not carry out natural gas of temperature, improves the acquisition rate of natural gas.
The sea bed gas hydrate acquisition method of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, by following step
Rapid realization:
If step 1, lash ship transport dry gas collecting hood is to specifying sea-bed area, control Auto-regulating System of Density of Heavy Medium system in buoyant module
Water-filling, controls natural gas collecting hood and transfers to during close to precalculated position, start propulsion system and natural gas collecting hood is carried out position
Fine setting；
After step 2, natural gas collecting hood reach precalculated position, control ring baffle and insert seabed mud bed, start anchoring system and make
Screw rod stretches in the mud bed of seabed, is fixed by natural gas collecting hood and seals；
Step 3, unlatching pressure regulating system, discharge the sea water within natural gas collecting hood, make natural gas collecting hood be internally formed
Negative pressure promotes decomposition of hydrate, and gas hydrates are collected by gas production pipe and processed and store to natural gas storage device,
The change of monitoring system monitoring natural gas collecting hood internal pressure, adjusts the duty of pressure regulating system in real time simultaneously, it is ensured that
The internal pressure of natural gas collecting hood is stable；
Step 4, monitoring system monitoring natural gas collecting hood internal temperature values, and detection temperature value is compared with setting value,
If temperature value is relatively low, start-up temperature regulation system, heating plant feeds hot water in heat supplying pipeline, and hot water enters along heat supplying pipeline
Enter natural gas collecting hood internal and branch to each branch line, make the heat energy of the hot water heat exchanger on each branch line carry out
Heat exchange, improves the internal temperature of natural gas collecting hood, then is back to heating plant through water return pipeline；When temperature value reaches preset value
Time, control apparatus of oxygen supply and stop hot-water supply；
Step 5, when the gas hydrates in same appointment sea-bed area gathered after certain time, start agitation system, control
Water jet device alignment seabed mud bed also sprays High-Pressure Water, and agitation seabed mud bed promotes 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 by buoyant module supply, fall
The global density of low natural gas collecting hood, anchoring system releases fixing, on natural gas collecting hood and lift-off from seabed mud bed
Contact, propulsion system promotes natural gas collecting hood to move to next one territory to be exploited, and repeats step 2 to step 5.
Due to said method, by the control of the natural gas collecting hood of precision, apply on sea-bottom natural gas is collected, for sea
The exploitation of end gas hydrates provides new direction.The acquisition method of the present invention, solves the gas hydrates of seabed mud bed,
Collecting decomposing and during exploitation, will not form the loss of natural gas and the problem of leakage, the present invention breaks through conventional thought
Pattern, utilizes pressure regulation to form negative pressure dexterously and humidity control system heats, promote the gas water of seabed mud bed kind
Compound decomposes, and the beneficially exploitation of sea bed gas hydrate the most greatly improves the acquisition rate of natural gas, can be repeated several times and make
With, the life-span is permanent.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, the present invention built-in buoyancy tank circulating hot water pipeline heating sea-bottom natural gas collection device and method, mainly solve sea
The gas hydrates of bed mud bed, collect decomposing and during exploitation, will not form the loss of natural gas and asking of leakage
Topic, the present invention breaks through conventional thought pattern, utilizes pressure regulation to form negative pressure dexterously and humidity control system heats, promote
The gas hydrate dissociation of seabed mud bed kind, the beneficially exploitation of sea bed gas hydrate, the most greatly improves natural gas
Acquisition rate, for sea bed gas hydrate exploitation provide new direction.
2, the present invention can by density, pressure, temperature control to ensure steady production, natural gas collection is convenient, adopt
Collection efficiency is high, can repeatedly use, and novel, and structure is ingenious, and the life-span is permanent, can be widely used for sea-bottom natural gas and adopts
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:
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of humidity control system in the present invention.
Fig. 3 is the schematic diagram of buoyant module in the present invention.
Labelling in figure: 1-natural gas collecting hood, 101-housing, 102-top platform, 103-baffle plate, 104-suspension ring；2-is close
Degree regulation 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；The regulation of 4-temperature is
System, 401-heat supplying pipeline, 402-heating plant, 403-heat exchanger, 404-water return pipeline；5-lash ship, 6-propulsion system, 7-days
So gas storage device, 8-anchoring system, 801-screw rod, 802-motor, 803-actuating device；9-agitation system, 10-monitors system
System, 12-gas production pipe, 13-marine riser.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary), unless specifically stated otherwise,
By other equivalences or there is the alternative features of similar purpose replaced.I.e., unless specifically stated otherwise, each feature is a series of
An example in equivalence or similar characteristics.
As shown in Figure 1 to Figure 3, the sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating of the present invention,
Including the natural gas collecting hood 1 of lash ship 5 and interior sky, described lash ship 5 is provided with natural gas storage device 7, and described natural gas is stored up
Device 7 connects natural gas collecting hood 1 top by gas production pipe 12, and described natural gas collecting hood 1 is connected to by marine riser 13
Bottom lash ship 5, described gas production pipe 12 is located in marine riser 13；Bottom described natural gas collecting hood 1, surrounding is disposed with grappling system
System 8, is provided with pressure regulating system 3 in the bottom of natural gas collecting hood 1, and described natural gas collecting hood 1 outer wall is provided with propelling system
System 6, is 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 temperature
Regulation system 4 and agitation system 9, described humidity control system 4 includes heating plant 402, heat supplying pipeline 401, heat exchanger 403
With water return pipeline 404, described lash ship 5 is provided with heating plant 402, and described heating plant 402 connects heat supplying pipeline 401,
Described heat supplying pipeline 401 is internal through marine riser 13 to natural gas collecting hood 1, be provided with in described natural gas collecting hood 1 some with
The branch line that heat supplying pipeline 401 is connected, 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, described branch line connects back to water lines 404, described water return pipeline 404
It is connected to heating plant 402 on lash ship 5 through marine riser 13.
Wherein said Auto-regulating System of Density of Heavy Medium system 2 includes buoyant module 201, for die block 202 and pneumatic circuit 203；Described sky
Being disposed with some buoyant module 201 between the inside and outside layer housing so arranged on gas collecting hood 1, described buoyant module 201 includes sealing
Interior empty van body, set electronic liquid level gauge 207 in described casing, described casing be 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 natural
Passing on the shell of gas collecting hood 1 and from marine riser 13 and be connected to confession die block 202, described confession die block 202 is located at lash ship 5
On.
Wherein said natural gas collecting hood 1 includes housing 101, top platform 102, baffle plate 103 and suspension ring 104, described shell
Body 101 includes ectonexine housing, the described hollow pyramid structure of housing 101, and 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, sets in the middle part of the outer wall of described housing 101
There are some suspension ring 104；Described branch line in housing 101 in pyramid frame structure.
Wherein said anchoring system 8 is located at surrounding bottom natural gas collecting hood 1, described anchoring system 8 include screw rod 801,
Motor 802, actuating device 803 and airtight anchoring shell, described anchoring shell is fixed on baffle plate 103 top, in described anchoring shell
Being fixed with motor 802, described motor 802 connects actuating device 803 and drives screw rod 801 rotary motion, described screw rod 801
Pass 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, the other end
It is positioned on lash ship 5 connection natural gas storage device 7；Wherein it is equipped with gas production pipe 12, pneumatic circuit 203 in marine riser 13, supplies
Oxygen pipeline 401 and cable.
Wherein said pressure regulating system 3 is located at the bottom of natural gas collecting hood 1, and described pressure regulating system 3 includes diving
Water pump 301 and suction box 302, it is internal that described suction box 302 is placed in natural gas collecting hood 1, and described immersible pump 301 is fixed on natural
On gas collecting hood 1, described immersible pump 301 connects suction box 302 by water supply hose, and described immersible pump 301 is by outlet pipe even
Pass to natural gas collecting hood 1 outside.
The inner lower of wherein said natural gas collecting hood 1 is provided with agitation system 9, and described agitation system 9 includes driving a vehicle 901
With water jet device 902, described driving 901 is fixed on housing 101 inwall, and described water jet device 902 is installed in driving 901
Can move by following vehicle.
Wherein said propulsion system 6 includes carrying platform 601, screw propeller 602 and motor 603, described lift-launch
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
On 601.
Being provided with monitoring system 10 in wherein said natural gas collecting hood 1, described monitoring system 10 includes that temperature is supervised with pressure
Surveying device and shell stress monitoring device, it is internal that described temperature and pressure monitoring device are arranged on top platform 102, some shells
The housing 101 that body stress monitoring device is arranged on natural gas collecting hood 1 is outside；Described monitoring system 10, propulsion system 6, pressure
Regulation system 3, anchoring system 8, agitation system 9 and Auto-regulating System of Density of Heavy Medium system 2 are connected to control centre by cable respectively.
Lash ship operates across the sea for operator and controls.Natural gas collecting hood can cover in the sea specifying region
On bed mud bed, and the seabed mud bed in this region is sealed, and the natural gas in this region is collected, and by natural
The natural gas storage device that gas gas production pipe is sent on lash ship is stored up.Marine riser for by gas production pipe, pneumatic circuit,
Ventilation channel and cable etc. are all placed in one, it is to avoid the sea water corrosion to it, it is ensured that its life-span.Anchoring system is located at natural gas
Surrounding bottom collecting hood, can be sealingly fastened in collecting hood on the mud bed of seabed, it is ensured that let out during carrying out natural gas collection
Leakage.Liquid in collecting hood can be discharged by pressure regulating system, forms negative pressure, promote seabed mud bed kind in making airtight collecting hood
Gas hydrate dissociation, the beneficially exploitation of sea bed gas hydrate.Agitation system then, is to specify region to adopt
After collection certain time, by agitation system, seabed mud bed is stirred, thus promote the deep layer decomposition of hydrate of seabed mud bed.
Propulsion system, when can be used for transferring to natural gas collecting hood specify region, is finely adjusted collecting hood, to guarantee collecting hood
It is accurately positioned.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 controls collecting hood
Raise and decentralize.All buoyant module are located between the inside and outside layer housing of collecting hood, so that the structure of collecting hood entirety is tighter
Gather simpler, and collecting hood is difficult to be affected by and produces movement, is more conducive to transport and preserves.Wherein temperature regulation
System is mainly used in being adjusted the temperature within collecting hood, when the temperature within natural gas collecting hood is too low, available
Heating plant passes through heat supplying pipeline supplying hot water in natural gas collecting hood, makes the energy of hot water be transferred in natural gas collecting hood
In heat supplying pipeline, through being further separated in each branch line after hot water reaches natural gas collecting hood, enter back into heat exchanger
In, the heat of hot water is discharged in natural gas collecting hood by heat exchanger, thus improves the temperature in natural gas collecting hood,
Guaranteeing that natural gas collects operation normally, the hot water after heat exchange is back to heating plant through water return pipeline, thus is formed
Circulation is reusable.Wherein branch line is the frame structure identical with natural gas collecting hood shape, make whole collecting hood and
Its internal heat energy distribution is uniform, thus in avoiding collecting hood, local temperature is too high, forms the bigger temperature difference, causes natural gas wink
Between bulbs of pressure moment increase, and the peril brought, it is ensured that production safety.The built-in buoyancy tank circulating hot water pipeline of the present invention
The sea-bottom natural gas collection device of heating, mainly solves the gas hydrates of seabed mud bed, collects in decomposition and exploits
During, the loss of natural gas and the problem of leakage will not be formed, the present invention breaks through conventional thought pattern, utilizes pressure dexterously
Regulation forms negative pressure and humidity control system heats, and promotes the gas hydrate dissociation of seabed mud bed kind, beneficially sky, seabed
So the exploitation of gas hydrate, the most greatly improves the acquisition rate of natural gas, and the exploitation for sea bed gas hydrate provides new
Direction；Visible, the present invention can by density, pressure, temperature control to ensure steady production, natural gas collection is convenient, adopt
Collection efficiency is high, can repeatedly use.
The sea bed gas hydrate acquisition method of the built-in buoyancy tank circulating hot water pipeline heating of the present invention, by following step
Rapid realization:
If step one, lash ship 5 transport dry gas collecting hood 1 and arrive appointment sea-bed area, control Auto-regulating System of Density of Heavy Medium system 2 to buoyancy mould
Water-filling in block 201, controls natural gas collecting hood 1 and transfers to during close to precalculated position, start propulsion system 6 by natural gas collecting hood
1 carries out fine position；
After step 2, natural gas collecting hood 1 reach precalculated position, control ring baffle 103 and insert seabed mud bed, start grappling system
System 5 makes screw rod 801 stretch in the mud bed of seabed, is fixed by natural gas collecting hood 1 and seals；
Step 3, unlatching pressure regulating system 3, discharge the sea water within natural gas collecting hood 1, makes natural gas collecting hood 1 internal
Forming 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
With storage, monitoring system 10 monitors the change of natural gas collecting hood 1 internal pressure simultaneously, adjusts the work of pressure regulating system 3 in real time
Make state, 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 are compared with setting value by detection temperature value
Relatively, if temperature value is relatively low, start-up temperature regulation system 4, heating plant 402 feeds hot water, hot water edge in heat supplying pipeline 401
Heat supplying pipeline 401 enters natural gas collecting hood 1 inside and branches to each branch line, makes the heat energy of hot water on each branch line
Heat exchanger 403 carry out heat exchange, improve the internal temperature of natural gas collecting hood 1, then be back to for hot charging through water return pipeline 404
Put 402；When temperature value reaches preset value, control apparatus of oxygen supply 402 and stop hot-water supply；
Step 5, when the gas hydrates in same appointment sea-bed area gathered after certain time, start agitation system 9, control
Controlling the water circulation mjector 902 is directed at seabed mud bed and sprays High-Pressure Water, and agitation seabed mud bed promotes deep water compound to divide；
Step 6, after the natural gas extraction specifying sea-bed area completes, Auto-regulating System of Density of Heavy Medium system 2 is by supplying to buoyant module 201
Gas, reduces the global density of natural gas collecting hood 1, and anchoring system 8 releases fixing, on natural gas collecting hood 1 and lift-off from sea
The contact of bed mud bed, propulsion system 6 promotes natural gas collecting hood 1 to move to next one territory to be exploited, and repeats step 2 to step
Five.
By the control of the natural gas collecting hood of precision, apply on sea-bottom natural gas is collected, be hydrated for sea-bottom natural gas
The exploitation of thing provides new direction.The acquisition method of the present invention, solves the gas hydrates of seabed mud bed, decompose collect and
During exploitation, will not form the loss of natural gas and the problem of leakage, the present invention breaks through conventional thought pattern, ingenious land productivity
Form negative pressure with pressure regulation 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, the most greatly improves the acquisition rate of natural gas, can repeatedly use, and the life-span is permanent.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any disclose in this manual
New feature or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (10)
- The sea-bottom natural gas collection device of the most built-in buoyancy tank circulating hot water pipeline heating, it is characterised in that: include lash ship (5) and interior Empty natural gas collecting hood (1), described lash ship (5) is provided with natural gas storage device (7), described natural gas storage device (7) Connecting natural gas collecting hood (1) top by gas production pipe (12), described natural gas collecting hood (1) is connected by marine riser (13) To lash ship (5) bottom, described gas production pipe (12) is located in marine riser (13)；Described natural gas collecting hood (1) bottom surrounding cloth It is equipped with anchoring system (8), is provided with pressure regulating system (3), described natural gas collecting hood in the bottom of natural gas collecting hood (1) (1) outer wall is provided with propulsion system (6), is 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), and described humidity control system (4) includes supplying Thermal (402), heat supplying pipeline (401), heat exchanger (403) and water return pipeline (404), described lash ship (5) is provided with heat supply Device (402), the upper connection of described heating plant (402) has heat supplying pipeline (401), and described heat supplying pipeline (401) passes marine riser (13) internal to natural gas collecting hood (1), it is provided with in described natural gas collecting hood (1) and some is connected with heat supplying pipeline (401) Branch line, described branch line is provided with some heat exchangers (403)；Described branch line is and natural gas collecting hood (1) frame structure that shape is identical, described branch line connects back to water lines (404), and described water return pipeline (404) passes water proof Pipe (13) is connected to the upper heating plant (402) of lash ship (5).
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 1 heating, its feature exists In: described Auto-regulating System of Density of Heavy Medium system (2) includes buoyant module (201), for die block (202) and pneumatic circuit (203)；Described natural Being disposed with some buoyant module (201) between the upper inside and outside layer housing arranged of gas collecting hood (1), described buoyant module (201) includes The interior empty van body sealed, sets electronic liquid level gauge (207), described casing is communicated with inside and outside drain pipe in described casing (206) with air inlet pipe (205), the air inlet pipe (205) of all buoyant module (201) is parallel on pneumatic circuit (203), described gas Pressure pipe road (203) is fixed on the shell of natural gas collecting hood (1) and through being connected to for die block from marine riser (13) (202), described confession die block (202) is located on lash ship (5).
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 2 heating, its feature exists In: described natural gas collecting hood (1) includes housing (101), top platform (102), baffle plate (103) and suspension ring (104), described shell Body (101) includes ectonexine housing, described housing (101) hollow pyramid structure, and the top of described housing (101) sets For top platform (102), the base of described housing (101) is sealedly connected with a circle ring baffle (103), described housing (101) some suspension ring (104) it are provided with in the middle part of outer wall；Described branch line in housing (101) in pyramid frame structure.
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 3 heating, its feature exists In: described anchoring system (8) is located at natural gas collecting hood (1) bottom surrounding, and described anchoring system (8) includes screw rod (801), electricity Motivation (802), actuating device (803) and airtight anchoring shell, described anchoring shell is fixed on baffle plate (103) top, described anchoring Being fixed with motor (802) in shell, described motor (802) connects actuating device (803) and drives screw rod (801) to rotate fortune Dynamic, described screw rod (801) passes the bottom of anchoring shell.
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 3 heating, its feature exists In: one end of described gas production pipe (12) is positioned at top platform (102) and connects natural gas collecting hood (1) inside, other end position In lash ship (5) upper connection natural gas storage device (7)；Wherein it is equipped with gas production pipe (12), pneumatic circuit in marine riser (13) (203), ventilation channel (401) and cable.
- 6. the sea-bottom natural gas collection device of the built-in buoyancy tank circulating hot water pipeline heating as described in claim 3 or 4 or 5, its Being characterised by: described 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) being fixed on natural gas collecting hood (1), described immersible pump (301) is by water supply hose connection suction box (302), described It is outside that immersible pump (301) is communicated to natural gas collecting hood (1) by outlet pipe.
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 6 heating, its feature exists In: the inner lower of described natural gas collecting hood (1) is provided with agitation system (9), and described agitation system (9) includes driving a vehicle (901) With water jet device (902), described driving (901) is fixed on housing (101) inwall, and described water jet device (902) is installed on Driving (901) is upper can move by following vehicle.
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 6 heating, its feature exists In: described propulsion system (6) includes carrying platform (601), screw propeller (602) and motor (603), and described lift-launch is put down Platform (601) is fixed on natural gas collecting hood (1) outer middle side part, and motor (603) connects screw propeller (622) and is arranged on lift-launch On platform (601).
- The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline the most as claimed in claim 8 heating, its feature exists In: being provided with monitoring system (10) in described natural gas collecting hood (1), described monitoring system (10) includes that temperature fills with pressure monitoring Putting and shell stress monitoring device, it is internal that described temperature and pressure monitoring device are arranged on top platform (102), some housings The housing (101) that monitor for stress 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) and Auto-regulating System of Density of Heavy Medium system (2) are connected by cable respectively In control centre.
- 10. the sea-bottom natural gas collection that the built-in buoyancy tank circulating hot water pipeline using one of claim 1 to 9 described heats The sea bed gas hydrate acquisition method of device, it is characterised in that: it is realized by following steps:Step 1, lash ship (5) if transport dry gas collecting hood (1) to specify sea-bed area, control Auto-regulating System of Density of Heavy Medium system (2) to Buoyant module (201) interior water-filling, controls natural gas collecting hood (1) and transfers to during close to precalculated position, and starting propulsion system (6) will Natural gas collecting hood (1) carries out fine position；After step 2, natural gas collecting hood (1) reach precalculated position, control ring baffle (103) and insert seabed mud bed, start anchor Determining system (5) makes screw rod (801) stretch in the mud bed of seabed, is fixed by natural gas collecting hood (1) and seals；Step 3, unlatching pressure regulating system (3), discharge the sea water that natural gas collecting hood (1) is internal, make natural gas collecting hood (1) Being internally formed negative pressure and promote decomposition of hydrate, gas hydrates are collected to natural gas storage device by gas production pipe (12) (7) process in and store, monitor system (10) monitoring natural gas collecting hood (1) internal pressure change simultaneously, adjust pressure in real time The duty of regulation system (3), it is ensured that the internal pressure of natural gas collecting hood (1) is stable；Step 4, monitoring system (10) monitoring natural gas collecting hood (1) internal temperature values, and detection temperature value is entered with setting value Row compares, if temperature value is relatively low, start-up temperature regulation system (4), heating plant (402) feeds in heat supplying pipeline (401) Hot water, hot water enters natural gas collecting hood (1) inside along heat supplying pipeline (401) and branches to each branch line, making the heat of hot water Heat exchange can be carried out by heat exchanger (403) on each branch line, improve the internal temperature of natural gas collecting hood (1), then warp Water return pipeline (404) is back to heating plant (402)；When temperature value reaches preset value, control apparatus of oxygen supply (402) and stop supply Hot water；Step 5, when the gas hydrates in same appointment sea-bed area gathered after certain time, start agitation system (9), control Controlling the water circulation mjector (902) alignment seabed mud bed also sprays High-Pressure Water, and agitation seabed mud bed promotes deep layer decomposition of hydrate；Step 6, after the natural gas extraction specifying sea-bed area completes, Auto-regulating System of Density of Heavy Medium system (2) is by buoyant module (201) Supply, reduces the global density of natural gas collecting hood (1), and anchoring system (8) releases fixing, and natural gas collecting hood (1) is upper and floats Disengaging contacts with seabed mud bed, and propulsion system (6) promotes natural gas collecting hood (1) to move to next one territory to be exploited, and repeats Step 2 is to step 5.
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| CN105863575B (en) | 2019-09-06 |
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