CN105840149B - The sea-bottom natural gas collection device and method of external buoyancy tank wall surface heating - Google Patents
The sea-bottom natural gas collection device and method of external buoyancy tank wall surface heating Download PDFInfo
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- CN105840149B CN105840149B CN201610170970.5A CN201610170970A CN105840149B CN 105840149 B CN105840149 B CN 105840149B CN 201610170970 A CN201610170970 A CN 201610170970A CN 105840149 B CN105840149 B CN 105840149B
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- natural gas
- collecting hood
- gas collecting
- sea
- shell
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C50/00—Obtaining minerals from underwater, not otherwise provided for
-
- 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
-
- 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
Abstract
The invention discloses the sea-bottom natural gas collection devices and method of a kind of external buoyancy tank wall surface heating, belong to natural gas acquisition technical field.The present invention includes the natural gas collecting hood of lash ship and interior sky, the lash ship is equipped with natural gas storage device, the natural gas storage device is connected at the top of natural gas collecting hood by gas production pipe, the natural gas collecting hood is connected to lash ship bottom by marine riser, and the gas production pipe is set in marine riser；Natural gas collecting hood bottom surrounding is disposed with anchoring system, pressure regulating system is equipped in the bottom of natural gas collecting hood, the natural gas collects cover outer wall and is equipped with propulsion system, the outer wall of the natural gas collecting hood is equipped with Auto-regulating System of Density of Heavy Medium system, is equipped with humidity control system and agitation system inside the natural gas collecting hood.Present invention mainly solves the gas hydrates of seabed mud bed, the problem of being collected and during exploitation decomposing, not will form the loss and leakage of natural gas.
Description
Technical field
The present invention relates to natural gases to acquire technical field, especially sea bed gas hydrate acquisition technique.
Background technique
Sea bed gas hydrate is the knot that methane gas is formed under the cryogenic high pressure environment in seabed with water molecules
Crystal is a kind of huge clean energy resource of reserves, is hopeful to substitute petroleum, coal as main energy sources.Gas hydrates are wide
It is general to be distributed in submarine sedimentary strata, have the characteristics that reserves it is big, it is weak it is cementing, stability is poor, once the temperature of region, pressure strip
Part changes, it is possible to lead to a large amount of decomposition of sea bed gas hydrate, gasify and freely discharge.
Since gas hydrates main decomposition is methane gas and water, however methane gas is greenhouse gases, is largely released
It is put into atmosphere and will cause greenhouse effects, do great damage to environment.How the gas hydrates in exploitation seabed are guaranteed
In the process natural gas do not reveal, not loss and how efficient decomposition gas hydrates, be all current sea-bottom natural gas
The main direction of studying of hydrate mineral reserve exploitation.
It, will usually by voltage drop method, heat injection method or note chemical-agent technique etc. in existing exploitation of gas hydrates technology
The Gas Hydrate of seabed tool is converted into gas and water, is collected to the gas obtained after conversion, then by underwater
Production facility or floating production facility are produced, and there is presently no a kind of exploitation methods of the sea bed gas hydrate of maturation
And system is formally put into commercial operation, the states such as the U.S., Japan carry out the exploitation of experimental nature.
Main cause is that existing exploitation method is all more complicated, at high cost, and lacks controllability and operability, is held
The leakage for easily causing methane gas, causes the greenhouse effects of environmental pollution and atmosphere, production efficiency is also unable to reach industrial development
Minimum requirements can not put into commercial operation also in laboratory's exploratory stage.Therefore, it is necessary to one kind can be realized green ring
It protects, the mining system of economical and efficient, realizes the exploitation to sea bed gas hydrate.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, providing a kind of sea of external buoyancy tank wall surface heating
Bottom natural gas collection device and method, mainly solve the gas hydrates of seabed mud bed, are decomposing the mistake collected and exploited
Cheng Zhong, the problem of not will form the loss and leakage of natural gas, the present invention break through conventional thought mode, dexterously utilize pressure tune
Section forms negative pressure and humidity control system heats, and to promote the gas hydrate dissociation of seabed mud bed kind, it is natural to be conducive to seabed
The exploitation of gas hydrate then greatly improves the acquisition rate of natural gas, provides new side for the exploitation of sea bed gas hydrate
To；As it can be seen that the present invention can guarantee steady production by the control to density, pressure, temperature, natural gas acquisition is convenient, acquires
It is high-efficient, it can repeatedly use.
The technical solution adopted by the invention is as follows:
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, is received including the natural gas of lash ship and interior sky
Collection cover, the lash ship are equipped with natural gas storage device, and the natural gas storage device connects natural gas by gas production pipe and receives
Collection cover top, the natural gas collecting hood are connected to lash ship bottom by marine riser, and the gas production pipe is set in marine riser；Institute
It states natural gas collecting hood bottom surrounding and is disposed with anchoring system, be equipped with pressure regulating system, institute in the bottom of natural gas collecting hood
It states natural gas and collects cover outer wall equipped with propulsion system, the outer wall of the natural gas collecting hood is equipped with Auto-regulating System of Density of Heavy Medium system, institute
It states and is equipped with humidity control system and agitation system inside natural gas collecting hood, the humidity control system includes heating plant, supplies
Pipe line and heat exchanger, the lash ship are equipped with heating plant, are connected with heat supplying pipeline, the heat supply on the heating plant
Pipeline passes through marine riser and connect with the heat exchanger in natural gas collecting hood, wherein several heat exchangers are fixed on the interior of shell
Wall, and connect by valve with heat supplying pipeline.
Due to above structure, lash ship is operated and is controlled across the sea for operator.Natural gas collecting hood can cover
In on the seabed mud bed in specified region, and the seabed mud bed in the region is sealed, and the natural gas in the region is carried out
It collects, and the natural gas storage device being sent on lash ship by Gas Exploitation air pipe is stored up.Marine riser will be for that will adopt
Air pipe, pneumatic circuit, heat supplying pipeline and cable etc. are all placed in one, and avoid corrosion of the seawater to it, it is ensured that its service life.Anchor
System is determined set on natural gas collecting hood bottom surrounding, collecting hood can be sealingly fastened on the mud bed of seabed, it is ensured that carries out natural gas
It is leaked during collecting.The liquid in collecting hood can be discharged for pressure regulating system, make to be formed in closed collecting hood negative
Pressure, promotes the gas hydrate dissociation of seabed mud bed kind, conducive to the exploitation of sea bed gas hydrate.And agitation system is then,
It is but is acquired after a certain period of time in specified region, seabed mud bed is stirred by agitation system, to promote seabed mud
The deep layer decomposition of hydrate of bed.Propulsion system when can be used for natural gas collecting hood transferring to specified region, carries out collecting hood
Fine tuning, to ensure the accurate positioning of collecting hood.And Auto-regulating System of Density of Heavy Medium system, then it is to be adjusted to the density of natural gas collecting hood itself
Section, to control raising and decentralizing for collecting hood.All buoyant modules are set to and are collected on cover outer wall, so that buoyant module is convenient for
It installs and fixed, and collecting hood is equally not easy to be affected by and generate movement, more conducively transports and save.Wherein exist
The inner wall of natural gas collecting hood is fixed with several heat exchangers, and these heat exchangers are connected to by heat supplying pipeline for hot charging
Set, it is seen that by heating plant can heat exchanger directly into natural gas collecting hood thermal energy is provided, and thermal energy passes through heat supply
Pipeline is sent to heat exchanger, so that heat exchanger is carried out heat exchange in the inner wall of natural gas collecting hood, to transfer thermal energy to
In natural gas collecting hood, when collection case temperature is too low, heat exchanger of the heating plant into collecting hood can be passed through and transmit heat
Can, thermal energy collecting hood inner wall into heat exchange is carried out so that the heat energy distribution of entire collecting hood and its inside is uniform, to keep away
It is excessively high to exempt from local temperature in collecting hood, forms the biggish temperature difference, natural gas instantaneous expansion pressure moment is caused to increase, and bring
Peril, it is ensured that production safety.The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, mainly solves
The gas hydrates of seabed mud bed not will form the loss and leakage of natural gas during decomposing collection and exploitation
Problem, the present invention break through conventional thought mode, dexterously adjust to form negative pressure and humidity control system is heated using pressure, to promote
Make the gas hydrate dissociation of seabed mud bed kind, conducive to the exploitation of sea bed gas hydrate, then greatly improves natural
The acquisition rate of gas provides new direction for the exploitation of sea bed gas hydrate；As it can be seen that the present invention can be by density, pressure, temperature
The control of degree is to guarantee steady production, and natural gas acquisition is convenient, collecting efficiency is high, can repeatedly use.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the Auto-regulating System of Density of Heavy Medium system includes buoyancy
Module, for the gentle pressure pipe road of die block；Wherein several buoyant modules are arranged on the outer wall of shell, and the buoyant module includes close
The interior empty van body of envelope, electronic liquid level gauge is set in the cabinet, and the cabinet is equipped with the inside and outside drainpipe of connection and air inlet pipe, institute
There is the air inlet pipe of buoyant module to be parallel on pneumatic circuit, the pneumatic circuit is fixed on the outer wall of shell and from marine riser
Across being connected to for die block.
Due to above structure, Auto-regulating System of Density of Heavy Medium system is by generating pressed gas for die block, and by pneumatic circuit to floating
Pressed gas is fed in the cabinet of power module, so as to which the intracorporal water of case is discharged, thus reduce the density of collecting hood itself into
It is mentioned on row；On the contrary in the decentralization for being collected cover, it can be discharged by the intracorporal pressed gas of control cabinet, seawater enters in cabinet
The density for increasing collecting hood itself, transfers collecting hood to seabed mud bed.All buoyant modules are set to the inside and outside layer of collecting hood
Between shell, to keep the more compact structure of collecting hood entirety simpler, and collecting hood is not easy to be affected by and generate
It is mobile, it more conducively transports and saves.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the natural gas collecting hood includes shell
Body, top platform, baffle and hanging ring, the shell include ectonexine shell, the hollow pyramid structure of shell, institute
State and be set as top platform at the top of shell, be sealedly connected with a circle ring baffle on the bottom edge of the shell, the shell it is outer
Several hanging rings are equipped in the middle part of wall.
Due to above structure, the shell of the pyramid structure of interior sky makes shell manufacture easy to produce, and structure more may be used
It leans on, more conducively the natural gas inner top that concentrates on shell, convenient for the collection of weather.Can be used for that buoyancy is arranged between ectonexine shell
Module, so that entire collecting hood more compact structure；Top platform is for connecting marine riser, convenient between lash ship and collecting hood
It is attached.Collecting hood bottom and seabed mud bed can be sealed, to can ensure that collection by the ring baffle on the bottom edge of shell
Negative pressure is formed in cover, promotes the gas hydrate dissociation of seabed mud bed kind, conducive to the exploitation of sea bed gas hydrate.It hangs
Ring, on the one hand can be used for lifting by crane collecting hood, on the other hand can be used for connecting the buoyant module of floating, improve to collecting hood
The control ability of buoyancy.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the anchoring system are received set on natural gas
Collection cover bottom surrounding, the anchoring system include screw rod, motor, transmission device and closed anchoring shell, and the anchoring shell is solid
Due to being fixed with motor in baffle top, the anchoring shell, the motor connects transmission device and drives screw rod rotation fortune
Dynamic, the screw rod is pierced by the bottom of anchoring shell.
Due to above structure, screw rod is controlled by transmission device using motor, screw rod is extend into the mud bed of seabed,
Collecting hood is fixed on the mud bed of seabed, it is ensured that the leakproofness and stability of collecting hood avoid subsea environment factor to collecting hood
Influence, collect and during exploitation so as to be effectively prevented from decomposing, the problem of the loss and leakage of natural gas.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, one end of the gas production pipe are located at top
Portion's platform is simultaneously connected to inside natural gas collecting hood, and the other end is located at connection natural gas storage device on lash ship；Wherein in marine riser
It is equipped with gas production pipe, pneumatic circuit, heat supplying pipeline and cable.
Due to above structure, gas production pipe is mainly used for 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
Pipeline and cable for connecting between lash ship and collecting hood etc., effectively protect pipeline and cable, lengthen its service life more
Long.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the pressure regulating system is set to natural
The bottom of gas collecting hood, the pressure regulating system include immersible pump and suction box, and the suction box is placed in natural gas collecting hood
Inside, the immersible pump are fixed on natural gas collecting hood, and the immersible pump is connected to suction box, the diving by water supply hose
Pump is connected to outside natural gas collecting hood by outlet pipe.
Due to above structure, which can be soft by intaking by the seawater inside collecting hood by suction box
Pipe and immersible pump are expelled to outside collecting hood, to make to form negative pressure inside collecting hood, are more conducive to promote the day of seabed mud bed kind
Right gas hydrate decomposes, and conducive to the exploitation of sea bed gas hydrate, then greatly improves the acquisition rate of natural gas；It presses simultaneously
Draught control system also ensures that the internal pressure of natural gas collecting hood is stablized.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the interior subordinate of the natural gas collecting hood
Side is equipped with agitation system, and the agitation system includes that inner walls, the water are fixed in driving and water jet device, the driving
It is mobile that fluidic device is installed on the upper energy following vehicle of driving.
Due to above structure, when the gas hydrates in same specified sea-bed area acquire after a certain period of time, starting is stirred
Dynamic system, control water jet device alignment seabed mud bed simultaneously spray high pressure water flow, and agitation seabed mud bed promotes deep layer hydrate point
Solution then greatly improves the acquisition rate of natural gas conducive to the exploitation of sea bed gas hydrate.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the propulsion system include to carry to put down
Platform, screw propeller and motor, the carrying platform are fixed on the outer middle side part of natural gas collecting hood, and motor connection propeller pushes away
It is mounted on carrying platform into device.
Due to above structure, when collecting hood is transferred to close to predetermined position, propulsion system can be started and collect natural gas
Cover carries out fine position, it can be ensured that collecting hood reaches predetermined position, more conducively to natural gas gathering in presumptive area.
The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, the natural gas collecting hood is interior to be equipped with prison
Examining system, the monitoring system include temperature and pressure monitoring device and shell stress monitoring device, and the temperature and pressure are supervised
It surveys device to be mounted on inside top platform, several shell stress monitoring devices are mounted on the hull outside of natural gas collecting hood；Institute
It states monitoring system, propulsion system, pressure regulating system, anchoring system, agitation system and Auto-regulating System of Density of Heavy Medium system and passes through cable respectively
It is connected to control centre.
Due to above structure, monitoring system is monitored in collecting hood implementablely and the pressure value on collecting hood, temperature value, from
And collecting hood can be monitored in real time, avoid that the pressure on natural gas collecting hood is excessive to cause danger, it is ensured that safe operation
Reliably；Or the too low acquisition that not can be carried out natural gas of temperature, improve the acquisition rate of natural gas.
The sea bed gas hydrate acquisition method of built-in buoyancy tank hot water heating wall surface of the invention passes through following steps reality
It is existing:
If step 1, lash ship transport dry gas collecting hood to specified sea-bed area, Auto-regulating System of Density of Heavy Medium system is controlled to buoyancy mould
Water-filling in block, when control natural gas collecting hood is transferred to close to predetermined position, starting propulsion system carries out natural gas collecting hood
Fine position；
After step 2, natural gas collecting hood reach predetermined position, control ring baffle is inserted into seabed mud bed, starting anchoring system
System protrudes into screw rod in the mud bed of seabed, and natural gas collecting hood is fixed and sealed；
Step 3, cracking pressure regulating system are discharged the seawater inside natural gas collecting hood, make inside natural gas collecting hood
It forms negative pressure and promotes decomposition of hydrate, gas hydrates are collected by gas production pipe to processing in natural gas storage device and storage
It deposits, while monitoring the variation of system monitoring natural gas collecting hood internal pressure, adjust the working condition of pressure regulating system in real time, really
The internal pressure for protecting natural gas collecting hood is stablized；
Step 4, monitoring system monitoring natural gas collecting hood internal temperature values, and will test temperature value and compared with setting value
Compared with, if temperature value is lower, thermal energy is transferred to heat exchanger by heat supplying pipeline by start-up temperature regulating system, heating plant,
Heat exchanger carries out heat exchange in natural gas collecting hood inner wall, the internal temperature of natural gas collecting hood is improved, when temperature value reaches
When preset value, control heating plant stops supply thermal energy；
Step 5, when in same specified sea-bed area gas hydrates acquisition after a certain period of time, start agitation system,
Control water jet device alignment seabed mud bed simultaneously sprays high pressure water flow, and agitation seabed mud bed promotes deep layer hydrate point；
Step 6, after the completion of the natural gas extraction of specified sea-bed area, Auto-regulating System of Density of Heavy Medium system to buoyant module by supplying
Gas reduces the global density of natural gas collecting hood, and anchoring system, which releases, fixes, and natural gas collecting hood floats and is detached from and seabed mud
The contact of bed, propulsion system push natural gas collecting hood to be moved to next domain to be exploited, repeat step 2 to step 5.
Due to the above method, by the control of the natural gas collecting hood of precision, apply in sea-bottom natural gas collection, for sea
The exploitation of bottom gas hydrates provides new direction.Acquisition method of the invention solves the gas hydrates of seabed mud bed,
It is collected and during exploitation, the problem of not will form the loss and leakage of natural gas, the present invention breaks through conventional thought decomposing
Mode dexterously adjusts to form negative pressure and humidity control system is heated using pressure, to promote the gas water of seabed mud bed kind
It closes object to decompose, conducive to the exploitation of sea bed gas hydrate, then greatly improves the acquisition rate of natural gas, can be repeated several times makes
With the service life is permanent.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, the sea-bottom natural gas collection device and method of built-in buoyancy tank hot water heating wall surface of the invention, mainly solves sea
The gas hydrates of bed mud bed not will form the loss of natural gas and asking for leakage during decomposing collection and exploitation
Topic, the present invention break through conventional thought mode, dexterously adjust to form negative pressure and humidity control system is heated using pressure, to promote
The gas hydrate dissociation of seabed mud bed kind then greatly improves natural gas conducive to the exploitation of sea bed gas hydrate
Acquisition rate, provide new direction for the exploitation of sea bed gas hydrate.
2, the present invention can guarantee steady production by the control to density, pressure, temperature, and natural gas acquisition is convenient, adopts
Collect high-efficient, can repeatedly use, and novel, clever structure, the service life is permanent, can be widely used for sea-bottom natural gas and adopts
Collection, it is applied widely, it is suitble to promote and apply.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 be in the present invention A to structural schematic diagram.
Fig. 3 is the schematic diagram of buoyant module in the present invention.
Marked in the figure: 101- shell, 102- top platform, 103- baffle, 104- hanging ring；201- buoyant module, 202-
For die block, 203,11- pneumatic circuit, 204- electrically operated valve, 205- air inlet pipe, 206- drainpipe, 207 electronic liquid level gauges；3-
Pressure regulating system, 301- immersible pump, 302- suction box；401- heat supplying pipeline, 402- heating plant, 403- heat exchanger；5-
Lash ship, 6- propulsion system, 7- natural gas storage device, 801- screw rod, 802- motor, 803- transmission device；9- agitation system,
10- monitors system, 12- gas production pipe, 13- marine riser.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract), unless specifically stated,
It is replaced by other equivalent or with similar purpose alternative features.That is, unless specifically stated, each feature is a series of
An example in equivalent or similar characteristics.
As shown in Figure 1 to Figure 3, the sea-bottom natural gas collection device of built-in buoyancy tank hot water heating wall surface of the invention, including
The natural gas collecting hood of lash ship 5 and interior sky, the lash ship 5 are equipped with natural gas storage device 7, the natural gas storage device 7
It is connected at the top of natural gas collecting hood by gas production pipe 12, the natural gas collecting hood is connected to 5 bottom of lash ship by marine riser 13
Portion, the gas production pipe 12 are set in marine riser 13；Natural gas collecting hood bottom surrounding is disposed with anchoring system 8, in day
The bottom of right gas collecting hood is equipped with pressure regulating system 3, and the natural gas collects cover outer wall and is equipped with propulsion system 6, the day
It is equipped with Auto-regulating System of Density of Heavy Medium system in the side wall of right gas collecting hood, is equipped with humidity control system and agitation inside the natural gas collecting hood
System 9, the humidity control system include heating plant 402, heat supplying pipeline 401 and heat exchanger 403, are set on the lash ship 5
There is heating plant 402, heat supplying pipeline 401 is connected on the heating plant 402, the heat supplying pipeline 401 passes through marine riser 13
The heat exchanger 403 being connected in natural gas collecting hood, wherein several heat exchangers 403 are fixed on the interior of natural gas collecting hood
Wall, and connect by valve with heat supplying pipeline 401.
Wherein the Auto-regulating System of Density of Heavy Medium system includes buoyant module 201, for die block 202 and pneumatic circuit 203；It is described natural
Several buoyant modules 201 are disposed between the inside and outside layer shell being arranged on gas collecting hood, the buoyant module 201 includes sealing
Interior empty van body, electronic liquid level gauge 207 is set in the cabinet, and the cabinet is equipped with the inside and outside drainpipe 206 of connection and air inlet pipe
205, the air inlet pipe 205 of all buoyant modules 201 is parallel on pneumatic circuit 203, and the pneumatic circuit 203 is fixed on natural gas
It passes through and is connected to for die block 202 on the shell of collecting hood and from marine riser 13, it is described to be set on lash ship 5 for die block 202.
Wherein the natural gas collecting hood includes shell 101, top platform 102, baffle 103 and hanging ring 104, the shell
101 include ectonexine shell, and the hollow pyramid structure of the shell 101, the top of the shell 101 is set as top horizontal
Platform 102 is sealedly connected with a circle ring baffle 103 on the bottom edge of the shell 101, is equipped in the middle part of the outer wall of the shell 101
Several hanging rings 104.
Wherein the anchoring system 8 is set to natural gas collecting hood bottom surrounding, and the anchoring system 8 includes screw rod 801, electricity
Motivation 802, transmission device 803 and closed anchoring shell, the anchoring shell are fixed on 103 top of baffle, consolidate in the anchoring shell
Surely there is motor 802, the motor 802 connects transmission device 803 and drives 801 rotary motion of screw rod, and the screw rod 801 is worn
The bottom of shell is anchored out.
Wherein one end of the gas production pipe 12 is located at top platform 102 and is connected to inside natural gas collecting hood, the other end
Natural gas storage device 7 is connected on lash ship 5；It is wherein equipped with gas production pipe 12 in marine riser 13, pneumatic circuit 203, supplies
Pipe line 401 and cable.
Wherein the pressure regulating system 3 is set to the bottom of natural gas collecting hood, and the pressure regulating system 3 includes diving
Pump 301 and suction box 302, the suction box 302 are placed in inside natural gas collecting hood, and the immersible pump 301 is fixed on natural gas
On collecting hood, the immersible pump 301 is connected to suction box 302 by water supply hose, and the immersible pump 301 is connected to by outlet pipe
Outside natural gas collecting hood.
Wherein the inner lower of the natural gas collecting hood is equipped with agitation system 9, and the agitation system 9 includes driving and water
101 inner wall of shell is fixed in fluidic device, the driving, and it is mobile that the water jet device 2 is installed on the upper energy following vehicle of driving.
Wherein the propulsion system 6 includes carrying platform, screw propeller and motor, and the carrying platform is fixed on
The outer middle side part of natural gas collecting hood, motor connection screw propeller are mounted on carrying platform.
Monitoring system 10 is wherein equipped in the natural gas collecting hood, the monitoring system 10 includes temperature and pressure monitoring
Device and shell stress monitoring device, the temperature and pressure monitoring device are mounted on inside top platform 102, several shells
Monitor for stress is mounted on outside the shell 101 of natural gas collecting hood；The monitoring system 10, propulsion system 6, pressure are adjusted
System 3, anchoring system 8, agitation system 9 and Auto-regulating System of Density of Heavy Medium system pass through cable connection in control centre respectively.
Lash ship is operated and is controlled across the sea for operator.Natural gas collecting hood can cover in the sea in specified region
On bed mud bed, and the seabed mud bed in the region is sealed, and the natural gas in the 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 be used for by gas production pipe, pneumatic circuit,
Heat supplying pipeline and cable etc. are all placed in one, and avoid corrosion of the seawater to it, it is ensured that its service life.Anchoring system is set to natural gas
Collecting hood can be sealingly fastened on the mud bed of seabed by collecting hood bottom surrounding, it is ensured that let out during natural gas is collected
Leakage.The liquid in collecting hood can be discharged for pressure regulating system, make to form negative pressure in closed collecting hood, promote seabed mud bed kind
Gas hydrate dissociation, conducive to the exploitation of sea bed gas hydrate.And agitation system is then, is but adopts in specified region
Collection after a certain period of time, stirs seabed mud bed by agitation system, to promote the deep layer decomposition of hydrate of seabed mud bed.
Propulsion system is finely adjusted collecting hood when can be used for natural gas collecting hood transferring to specified region, to ensure collecting hood
It is accurately positioned.And Auto-regulating System of Density of Heavy Medium system, then it is that the density of natural gas collecting hood itself is adjusted, to control collecting hood
It raises and decentralizes.All buoyant modules are set to and are collected on cover outer wall, so that buoyant module is easily installed and fixes, and collecting hood
It is equally not easy to be affected by and generate movement, more conducively transports and save.Wherein in the inner wall of natural gas collecting hood
It is fixed with several heat exchangers, and these heat exchangers are connected on heating plant by heat supplying pipeline, it is seen that pass through heat supply
Device can heat exchanger directly into natural gas collecting hood thermal energy is provided, and thermal energy is sent to heat exchange by heat supplying pipeline
Device makes heat exchanger carry out heat exchange in the inner wall of natural gas collecting hood, thus transfer thermal energy in natural gas collecting hood, when
, can be by heat exchanger transferring heat energy of the heating plant into collecting hood when collection case temperature is too low, thermal energy is in collecting hood
Inner wall is into heat exchange is carried out, so that the heat energy distribution of entire collecting hood and its inside is uniform, to avoid part temperature in collecting hood
Height is spent, the biggish temperature difference is formed, natural gas instantaneous expansion pressure moment is caused to increase, and bring peril, it is ensured that it is raw
Produce safety.The sea-bottom natural gas collection device of external buoyancy tank wall surface heating of the invention, mainly solves the natural of seabed mud bed
Gas hydrate is collected and during exploitation, the problem of not will form the loss and leakage of natural gas, the present invention is broken through decomposing
Conventional thought mode dexterously adjusts to form negative pressure and humidity control system is heated using pressure, to promote seabed mud bed kind
Gas hydrate dissociation then greatly improves the acquisition rate of natural gas conducive to the exploitation of sea bed gas hydrate, for sea
The exploitation of bottom gas hydrates provides new direction；As it can be seen that the present invention can be by the control to density, pressure, temperature to guarantee
Steady production, natural gas acquisition is convenient, collecting efficiency is high, can repeatedly use.
The sea bed gas hydrate acquisition method of built-in buoyancy tank hot water heating wall surface of the invention passes through following steps reality
It is existing:
If controlling Auto-regulating System of Density of Heavy Medium system to buoyancy Step 1: lash ship 5 transports dry gas collecting hood to specified sea-bed area
Water-filling in module 201, when control natural gas collecting hood is transferred to close to predetermined position, starting propulsion system 6 collects natural gas
Cover carries out fine position；
Step 2: control ring baffle 103 is inserted into seabed mud bed after natural gas collecting hood reaches predetermined position, start anchor
Determining system 5 protrudes into screw rod 801 in the mud bed of seabed, and natural gas collecting hood is fixed and sealed；
Step 3: cracking pressure regulating system 3, is discharged the seawater inside natural gas collecting hood, makes in natural gas collecting hood
Portion forms negative pressure and promotes decomposition of hydrate, and gas hydrates are collected by gas production pipe 12 to natural gas storage device 7
Reason and storage, while monitoring system 10 and monitoring the variation of natural gas collecting hood internal pressure, the work of pressure regulating system 3 is adjusted in real time
Make state, it is ensured that the internal pressure of natural gas collecting hood is stablized；
Step 4: monitoring system 10 monitor natural gas collecting hood internal temperature values, and will test temperature value and setting value into
Row compares, if temperature value is lower, thermal energy is transferred to by start-up temperature regulating system, heating plant 402 by heat supplying pipeline 401
Heat exchanger 403, heat exchanger 403 carry out heat exchange in natural gas collecting hood inner wall, improve the inside temperature of natural gas collecting hood
Degree, when temperature value reaches preset value, control heating plant 402 stops supply thermal energy；
Step 5: starting agitation system when the gas hydrates in same specified sea-bed area acquire after a certain period of time
9, control water jet device alignment seabed mud bed simultaneously sprays high pressure water flow, and agitation seabed mud bed promotes deep layer hydrate point；
Step 6: after the completion of the natural gas extraction of specified sea-bed area, Auto-regulating System of Density of Heavy Medium system is by buoyant module 201
Gas supply reduces the global density of natural gas collecting hood, and anchoring system 8, which releases, fixes, and natural gas collecting hood floats and is detached from and sea
The contact of bed mud bed, propulsion system 6 push natural gas collecting hood to be moved to next domain to be exploited, repeat step 2 to step 5.
By the control of the natural gas collecting hood of precision, applies in sea-bottom natural gas collection, be hydrated for sea-bottom natural gas
The exploitation of object provides new direction.Acquisition method of the invention solves the gas hydrates of seabed mud bed, decompose collect and
During exploitation, the problem of not will form the loss and leakage of natural gas, the present invention breaks through conventional thought mode, ingenious land productivity
It is adjusted with pressure and to form negative pressure and humidity control system heats, to promote the gas hydrate dissociation of seabed mud bed kind, be conducive to
The exploitation of sea bed gas hydrate then greatly improves the acquisition rate of natural gas, can repeatedly use, the service life is permanent.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating, it is characterised in that: natural including lash ship (5) and interior sky
Gas collecting hood, the lash ship (5) are equipped with natural gas storage device (7), and the natural gas storage device (7) passes through gas production pipe
(12) at the top of connection natural gas collecting hood, the natural gas collecting hood is connected to lash ship (5) bottom by marine riser (13), described
Gas production pipe (12) is set in marine riser (13)；Natural gas collecting hood bottom surrounding is disposed with anchoring system, in natural gas
The bottom of collecting hood is equipped with pressure regulating system (3), and the natural gas collects cover outer wall and is equipped with propulsion system (6), the day
The outer wall of right gas collecting hood is equipped with Auto-regulating System of Density of Heavy Medium system, is equipped with humidity control system and agitation inside the natural gas collecting hood
System (9), the humidity control system include heating plant (402), heat supplying pipeline (401) and heat exchanger (403), the mother
Ship (5) is equipped with heating plant (402), is connected with heat supplying pipeline (401), the heat supplying pipeline on the heating plant (402)
(401) it passes through marine riser (13) to connect with the heat exchanger (403) in natural gas collecting hood, the natural gas collecting hood includes shell
Body (101) wherein several heat exchangers (403) are fixed on the inner wall of shell (101), and passes through valve and heat supplying pipeline (401)
Connection.
2. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as described in claim 1, it is characterised in that: described close
Spending regulating system includes buoyant module (201), for die block (202) and pneumatic circuit (203)；Wherein several buoyant modules
(201) it is arranged on the outer wall of shell (101), the buoyant module (201) includes the interior empty van body of sealing, is set in the cabinet
Electronic liquid level gauge (207), the cabinet are equipped with the inside and outside drainpipe (206) of connection and air inlet pipe (205), all buoyant modules
(201) air inlet pipe (205) is parallel on pneumatic circuit (203), and the pneumatic circuit (203) is fixed on the outer of shell (101)
It passes through on wall and from marine riser (13) and is connected to for die block (202).
3. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as claimed in claim 2, it is characterised in that: the day
Right gas collecting hood further includes top platform (102), baffle (103) and hanging ring (104), and the shell (101) includes ectonexine shell
Body, the shell (101) hollow pyramid structure are set as top platform (102), institute at the top of the shell (101)
State and be sealedly connected with a circle ring baffle (103) on the bottom edge of shell (101), the shell (101) if outer wall in the middle part of be equipped with
Dry hanging ring (104).
4. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as claimed in claim 3, it is characterised in that: the anchor
System is determined set on natural gas collecting hood bottom surrounding, and the anchoring system includes screw rod (801), motor (802), transmission device
(803) it is fixed on baffle (103) top, is fixed with motor in the anchoring shell with closed anchoring shell, the anchoring shell
(802), the motor (802) connects transmission device (803) and drives screw rod (801) rotary motion, and the screw rod (801) is worn
The bottom of shell is anchored out.
5. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as claimed in claim 3, it is characterised in that: described to adopt
One end of air pipe (12) is located at top platform (102) and is connected to inside natural gas collecting hood, and the other end is located on lash ship (5) and connects
Connect natural gas storage device (7)；Wherein gas production pipe (12), pneumatic circuit (203), heat supplying pipeline are equipped in marine riser (13)
(401) and cable.
6. the sea-bottom natural gas collection device that the external buoyancy tank wall surface as described in claim 3 or 4 or 5 heats, it is characterised in that:
The pressure regulating system (3) is set to the bottom of natural gas collecting hood, and the pressure regulating system (3) includes immersible pump (301)
With suction box (302), the suction box (302) is placed in inside natural gas collecting hood, and the immersible pump (301) is fixed on natural gas
On collecting hood, the immersible pump (301) is connected to suction box (302) by water supply hose, and the immersible pump (301) passes through outlet pipe
It is connected to outside natural gas collecting hood.
7. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as claimed in claim 6, it is characterised in that: the day
The inner lower of right gas collecting hood is equipped with agitation system (9), and the agitation system (9) includes driving and water jet device, described
Inner walls are fixed in driving, and it is mobile that the water jet device is installed on the upper energy following vehicle of driving.
8. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as claimed in claim 6, it is characterised in that: described to push away
It include carrying platform, screw propeller and motor into system (6), the carrying platform is fixed on the outside of natural gas collecting hood
Middle part, motor connection screw propeller are mounted on carrying platform.
9. the sea-bottom natural gas collection device of external buoyancy tank wall surface heating as claimed in claim 8, it is characterised in that: the day
Monitoring system (10) are equipped in right gas collecting hood, the monitoring system (10) includes that temperature is answered with pressure monitoring device and shell
Power monitoring device, the temperature and pressure monitoring device are mounted on top platform (102) inside, several shell stress monitoring devices
The shell (101) for being mounted on natural gas collecting hood is external；The monitoring system (10), propulsion system (6), pressure regulating system
(3), anchoring system, agitation system (9) and Auto-regulating System of Density of Heavy Medium system pass through cable connection in control centre respectively.
10. a kind of sea-bottom natural gas collection device using the heating of external buoyancy tank wall surface described in claim 5 or 6 or 8 or 9
Acquisition method, it is characterised in that: it is realized by following steps:
Step 1, lash ship (5) are if transport dry gas collecting hood controls Auto-regulating System of Density of Heavy Medium system to buoyancy mould to specified sea-bed area
Block (201) interior water-filling, when control natural gas collecting hood is transferred to close to predetermined position, natural gas is received in starting propulsion system (6)
Collection cover carries out fine position；
After step 2, natural gas collecting hood reach predetermined position, seabed mud bed, starting anchoring system are inserted into control ring baffle (103)
System (5) protrudes into screw rod (801) in the mud bed of seabed, and natural gas collecting hood is fixed and sealed；
The seawater inside natural gas collecting hood is discharged in step 3, cracking pressure regulating system (3), makes shape inside natural gas collecting hood
Promote decomposition of hydrate at negative pressure, gas hydrates are collected by gas production pipe (12) to place in natural gas storage device (7)
Reason and storage, while system (10) monitoring natural gas collecting hood internal pressure variation is monitored, adjust pressure regulating system (3) in real time
Working condition, it is ensured that the internal pressure of natural gas collecting hood is stablized；
Step 4, monitoring system (10) monitor natural gas collecting hood internal temperature values, and will test temperature value and compared with setting value
Compared with if temperature value is lower, thermal energy is transferred to by start-up temperature regulating system, heating plant (402) by heat supplying pipeline (401)
Heat exchanger (403), heat exchanger (403) carry out heat exchange in natural gas collecting hood inner wall, improve the interior of natural gas collecting hood
Portion's temperature, when temperature value reaches preset value, control heating plant (402) stops supply thermal energy；
Step 5, when in same specified sea-bed area gas hydrates acquisition after a certain period of time, start agitation system (9), control
Water jet device processed is directed at seabed mud bed and sprays high pressure water flow, and agitation seabed mud bed promotes deep layer decomposition of hydrate；
Step 6, after the completion of the natural gas extraction of specified sea-bed area, Auto-regulating System of Density of Heavy Medium system to buoyant module (201) by supplying
Gas reduces the global density of natural gas collecting hood, and anchoring system, which releases, fixes, and natural gas collecting hood floats and is detached from and seabed mud
The contact of bed, propulsion system (6) push natural gas collecting hood to be moved to next domain to be exploited, repeat step 2 to step 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610170970.5A CN105840149B (en) | 2016-03-24 | 2016-03-24 | The sea-bottom natural gas collection device and method of external buoyancy tank wall surface heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610170970.5A CN105840149B (en) | 2016-03-24 | 2016-03-24 | The sea-bottom natural gas collection device and method of external buoyancy tank wall surface heating |
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| CN105840149B true CN105840149B (en) | 2019-08-02 |
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| CN201610170970.5A Expired - Fee Related CN105840149B (en) | 2016-03-24 | 2016-03-24 | The sea-bottom natural gas collection device and method of external buoyancy tank wall surface heating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022248998A1 (en) * | 2021-05-25 | 2022-12-01 | Aarbakke Innovation As | Water bottom deployable gas hydrate production system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571303A (en) * | 2017-03-01 | 2018-09-25 | 周巽 | The methane being arranged in the combustible ice mineral reserve fragment in seabed generates generating means |
| CN109798092B (en) * | 2018-12-26 | 2022-01-07 | 浙江省海洋水产研究所 | Seabed natural gas receiving equipment with built-in heating pipeline |
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|---|---|---|---|---|
| CA2544489A1 (en) * | 2003-11-04 | 2005-05-26 | Charles Wendland | System for extracting natural gas hydrate |
| RU2393338C1 (en) * | 2008-10-21 | 2010-06-27 | Государственное образовательное учреждение высшего профессионального образования Дальневосточный государственный технический университет (ДВПИ имени В.В. Куйбышева) ГОУ ВПО ДВГТУ | Offshore natural gas extraction plant |
| CN102140907A (en) * | 2011-01-14 | 2011-08-03 | 何相龙 | Method for collecting methane from combustible ice |
| CN104278975A (en) * | 2013-07-06 | 2015-01-14 | 李贤明 | Method and system for collecting seabed combustible ice |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120193103A1 (en) * | 2011-01-28 | 2012-08-02 | The Texas A&M University System | Method and apparatus for recovering methane from hydrate near the sea floor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2544489A1 (en) * | 2003-11-04 | 2005-05-26 | Charles Wendland | System for extracting natural gas hydrate |
| RU2393338C1 (en) * | 2008-10-21 | 2010-06-27 | Государственное образовательное учреждение высшего профессионального образования Дальневосточный государственный технический университет (ДВПИ имени В.В. Куйбышева) ГОУ ВПО ДВГТУ | Offshore natural gas extraction plant |
| CN102140907A (en) * | 2011-01-14 | 2011-08-03 | 何相龙 | Method for collecting methane from combustible ice |
| CN104278975A (en) * | 2013-07-06 | 2015-01-14 | 李贤明 | Method and system for collecting seabed combustible ice |
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| WO2022248998A1 (en) * | 2021-05-25 | 2022-12-01 | Aarbakke Innovation As | Water bottom deployable gas hydrate production system |
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