CN105863575B - The sea-bottom natural gas collection device and method of built-in buoyancy tank circulating hot water pipeline heating - Google Patents
The sea-bottom natural gas collection device and method of built-in buoyancy tank circulating hot water pipeline heating Download PDFInfo
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- CN105863575B CN105863575B CN201610170986.6A CN201610170986A CN105863575B CN 105863575 B CN105863575 B CN 105863575B CN 201610170986 A CN201610170986 A CN 201610170986A CN 105863575 B CN105863575 B CN 105863575B
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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
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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
- E21B43/16—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 the sea-bottom natural gas collection devices and method of a kind of built-in buoyancy tank circulating hot water pipeline 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, it is equipped with Auto-regulating System of Density of Heavy Medium system in the side wall of the natural gas collecting hood, 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 built-in buoyancy tank circulating hot water pipeline
The sea-bottom natural gas collection device and method of heating, mainly solve 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, is the exploitation of sea bed gas hydrate
New direction is provided；As it can be seen that the present invention can guarantee steady production, natural gas acquisition side by the control to density, pressure, temperature
Just, collecting efficiency is high, can repeatedly use.
The technical solution adopted by the invention is as follows:
The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating of the invention, including lash ship and interior empty
Natural gas collecting hood, the lash ship are equipped with natural gas storage device, and the natural gas storage device is connected by gas production pipe
At the top of natural gas collecting hood, the natural gas collecting hood is connected to lash ship bottom by marine riser, the gas production pipe set on every
In water pipe；Natural gas collecting hood bottom surrounding is disposed with anchoring system, is equipped with pressure tune in the bottom of natural gas collecting hood
Section system, the natural gas collect cover outer wall and are equipped with propulsion system, are equipped with density tune in the side wall of the natural gas collecting hood
Section system, the natural gas collecting hood inside are equipped with humidity control system and agitation system, and the humidity control system includes supplying
Thermal, heat supplying pipeline, heat exchanger and water return pipeline, the lash ship are equipped with heating plant, connect on the heating plant
There is heat supplying pipeline, the heat supplying pipeline passes through inside marine riser to natural gas collecting hood, if being equipped in the natural gas collecting hood
The dry branch line being connected with heat supplying pipeline, the branch line are equipped with several heat exchangers；The branch line be with
Natural gas collects the identical frame structure of hood shape, and the branch line connects water return pipeline, and the water return pipeline passes through water proof
Pipe is connected to heating plant on lash ship.
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 between the inside and outside layer shell of collecting hood, to make
The more compact structure of collecting hood entirety is simpler, and collecting hood is not easy to be affected by and generate movement, more conducively transports
Defeated and preservation.Wherein humidity control system is mainly used for that the temperature inside collecting hood is adjusted, when in natural gas collecting hood
When the temperature in portion is too low, using heating plant by heat supplying pipeline supplying hot water into natural gas collecting hood, make the energy of hot water
It is transferred in the heat supplying pipeline in natural gas collecting hood, is further separated into each branched pipe after hot water reaches natural gas collecting hood
Lu Zhong is entered back into heat exchanger, and heat exchanger discharges the heat of hot water in natural gas collecting hood, to improve
Temperature in natural gas collecting hood, it is ensured that natural gas normally collects operation, and the hot water after heat exchange is returned through water return pipeline
It is back to heating plant, so that it is reusable to form circulation.Wherein branch line is frame identical with natural gas collection hood shape
Frame structure keeps the heat energy distribution of entire collecting hood and its inside uniform, to avoid local temperature in collecting hood excessively high, formed compared with
The big temperature difference causes natural gas instantaneous expansion pressure moment to increase, and bring peril, 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
Object is collected and during exploitation, the problem of not will form the loss and leakage of natural gas decomposing, and the present invention, which is broken through, conventional to be thought
Dimensional pattern dexterously adjusts to form negative pressure and humidity control system is heated using pressure, to promote the natural gas of seabed mud bed kind
Decomposition of hydrate then greatly improves the acquisition rate of natural gas conducive to the exploitation of sea bed gas hydrate, is that seabed is natural
The exploitation of gas hydrate provides new direction；As it can be seen that the present invention can guarantee to stablize life by the control to density, pressure, temperature
It produces, natural gas acquisition is convenient, collecting efficiency is high, can repeatedly use.
The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating of the invention, the Auto-regulating System of Density of Heavy Medium system
Including buoyant module, for the gentle pressure pipe road of die block；If being disposed between the inside and outside layer shell being arranged on the natural gas collecting hood
Dry buoyant module, the buoyant module include the interior empty van body of sealing, set electronic liquid level gauge in the cabinet, set on the cabinet
The drainpipe and air inlet pipe, the air inlet pipe of all buoyant modules for having connection inside and outside are parallel on pneumatic circuit, the pneumatic circuit
It is fixed on the shell of natural gas collecting hood and is passed through from marine riser and is connected to for die block, it is described to be set to lash ship for die block
On.
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 built-in buoyancy tank circulating hot water pipeline heating of the invention, the natural gas collecting hood
Including shell, top platform, baffle and hanging ring, the shell includes ectonexine shell, the hollow pyramid of shell
Structure is set as top platform at the top of the shell, a circle ring baffle, the shell is sealedly connected on the bottom edge of the shell
Several hanging rings are equipped in the middle part of the outer wall of body, the branch line is in pyramid frame structure in shell.
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.Wherein the branch line is in pyramid frame structure in shell, can be collected with natural gas
The inner-cavity structure of cover matches, and when heating in natural gas collecting hood, can make the thermal energy of entire collecting hood and its inside
It is evenly distributed, to avoid local temperature in collecting hood excessively high, forms the biggish temperature difference, cause natural gas instantaneous expansion pressure wink
Between increase, and bring peril, it is ensured that production safety.
The sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating of the invention, the anchoring system are set to
Natural gas collecting hood bottom surrounding, the anchoring system include screw rod, motor, transmission device and closed anchoring shell, described
Anchoring shell is fixed on baffle top, and motor is fixed in the anchoring shell, and the motor connects transmission device and drives spiral shell
Bar rotary motion, the screw rod are 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 built-in buoyancy tank circulating hot water pipeline heating of the invention, the one of the gas production pipe
End is located at top platform and is connected to inside natural gas collecting hood, and the other end is located at connection natural gas storage device on lash ship；Wherein
Gas production pipe, pneumatic circuit, heat supplying pipeline and cable are equipped in marine riser.
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 built-in buoyancy tank circulating hot water pipeline heating of the invention, the pressure regulating system
Set on the bottom of natural gas collecting hood, the pressure regulating system includes immersible pump and suction box, and the suction box is placed in naturally
Inside gas collecting hood, the immersible pump is fixed on natural gas collecting hood, and the immersible pump is connected to suction box by water supply hose,
The immersible 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 built-in buoyancy tank circulating hot water pipeline heating of the invention, the natural gas collecting hood
Inner lower be equipped with agitation system, the agitation system include driving and water jet device, the driving be fixed in shell
Wall, it is mobile that the water jet 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 built-in buoyancy tank circulating hot water pipeline heating of the invention, the propulsion system include
There are carrying platform, screw propeller and motor, the carrying platform is fixed on the outer middle side part of natural gas collecting hood, motor connection
Screw propeller is mounted on carrying platform.
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 built-in buoyancy tank circulating hot water pipeline heating of the invention, the natural gas collecting hood
Interior to be equipped with monitoring system, the monitoring system includes temperature and pressure monitoring device and shell stress monitoring device, the temperature
It is mounted on inside top platform with pressure monitoring device, several shell stress monitoring devices are mounted on the shell of natural gas collecting hood
It is external；The 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
Cable connection is crossed in 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 circulating hot water pipeline heating of the invention, passes through following step
It is rapid to realize:
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, start-up temperature regulating system, heating plant feeds hot water into heat supplying pipeline, and hot water is along heating tube
Road enters inside natural gas collecting hood and branches to each branch line, makes heat exchanger of the thermal energy of hot water on each branch line
Heat exchange is carried out, the internal temperature of natural gas collecting hood is improved, then is back to heating plant through water return pipeline；When temperature value reaches pre-
If when value, control heating plant stops hot-water supply；
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 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 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 circulating hot water pipeline of the invention heating, mainly solves
The gas hydrates of seabed mud bed are collected decomposing and during exploitation, not will form the loss and leakage of natural gas
The problem of, the present invention breaks through conventional thought mode, dexterously adjusts to form negative pressure and humidity control system is heated using pressure, comes
The gas hydrate dissociation of seabed mud bed kind is promoted then greatly to improve day conducive to the exploitation of sea bed gas hydrate
The acquisition rate of right gas, provides 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 is the structural schematic diagram of humidity control system in the present invention.
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- are supplied
Die block, 203,11- pneumatic circuit, 204- electrically operated valve, 205- air inlet pipe, 206- drainpipe, 207 electronic liquid level gauges；3- pressure
Draught control system, 301- immersible pump, 302- suction box；, 401- heat supplying pipeline, 402- heating plant, 403- heat exchanger, 404-
Water return pipeline；5- lash ship, 6- propulsion system, 7- natural gas storage device, 801- screw rod, 802- motor, 803- transmission dress
It sets；9- agitation system, 10- monitor 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 circulating hot water pipeline of the invention heating,
Natural gas collecting hood including lash ship 5 and interior sky, the lash ship 5 are equipped with natural gas storage device 7, and the natural gas stores up dress
It sets 7 to connect at the top of natural gas collecting hood by gas production pipe 12, the natural gas collecting hood is connected to lash ship 5 by marine riser 13
Bottom, the gas production pipe 12 are set in marine riser 13；Natural gas collecting hood bottom surrounding is disposed with anchoring system, 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, heat exchanger 403 and water return pipeline 404, institute
It states lash ship 5 and is equipped with heating plant 402, be connected with heat supplying pipeline 401 on the heating plant 402, the heat supplying pipeline 401 is worn
It crosses inside marine riser 13 to natural gas collecting hood, equipped with several points being connected with heat supplying pipeline 401 in the natural gas collecting hood
Bye-pass, the branch line are equipped with several heat exchangers 403；The branch line is to collect hood shape phase with natural gas
Same frame structure, the branch line connect water return pipeline 404, and the water return pipeline 404 passes through marine riser 13 and is connected to mother
Heating plant 402 on ship 5.
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；The branch line is in pyramid frame structure in shell 101.
Wherein the anchoring system is set to natural gas collecting hood bottom surrounding, and the anchoring system includes screw rod 801, electronic
Machine 802, transmission device 803 and closed anchoring shell, the anchoring shell are fixed on 103 top of baffle, fix in the anchoring shell
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 pierced by
Anchor the bottom of shell.
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 901
With water jet device 902,101 inner wall of shell is fixed in the driving 901, and the water jet device 902 is installed in driving 901
It can following vehicle movement.
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, 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 between the inside and outside layer shell of collecting hood, to keep the structure of collecting hood entirety tighter
It gathers more simply, and collecting hood is not easy to be affected by and generate movement, more conducively transports and save.Wherein temperature is adjusted
System is mainly used for that the temperature inside collecting hood is adjusted, available when the temperature inside natural gas collecting hood is too low
Heating plant is made in the energy transmission of hot water to natural gas collecting hood by heat supplying pipeline supplying hot water into natural gas collecting hood
In heat supplying pipeline, it is further separated into each branch line after hot water reaches natural gas collecting hood, enters back into heat exchanger
Interior, heat exchanger discharges the heat of hot water in natural gas collecting hood, so that the temperature in natural gas collecting hood is improved,
Ensure that natural gas normally collects operation, the hot water after heat exchange is back to heating plant through water return pipeline, to be formed
Circulation is reusable.Wherein branch line is to collect the identical frame structure of hood shape with natural gas, make entire collecting hood and
Its internal heat energy distribution is uniform, to avoid local temperature in collecting hood excessively high, forms the biggish temperature difference, causes natural gas wink
Between bulbs of pressure moment increase, and bring peril, it is ensured that production safety.Built-in buoyancy tank circulating hot water pipeline of the invention
The sea-bottom natural gas collection device of heating, mainly solves the gas hydrates of seabed mud bed, decompose collect and exploitation
In the process, the problem of not will form the loss and leakage of natural gas, the present invention break through conventional thought mode, dexterously utilize pressure
Adjusting forms negative pressure and humidity control system heats, and to promote the gas hydrate dissociation of seabed mud bed kind, is conducive to seabed day
The exploitation of right gas hydrate, then greatly improves the acquisition rate of natural gas, provides newly for the exploitation of sea bed gas hydrate
Direction；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, adopts
Collect high-efficient, can repeatedly use.
The sea bed gas hydrate acquisition method of built-in buoyancy tank circulating hot water pipeline heating of the invention, passes through following step
It is rapid to realize:
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 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, start-up temperature regulating system, heating plant 402 feeds hot water into heat supplying pipeline 401, heat
Water enters inside natural gas collecting hood along heat supplying pipeline 401 and branches to each branch line, makes the thermal energy of hot water in each branched pipe
The heat exchanger 403 of road carries out heat exchange, improves the internal temperature of natural gas collecting hood, then is back to confession through water return pipeline 404
Thermal 402；When temperature value reaches preset value, control heating plant 402 stops hot-water supply；
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 902 is directed at seabed mud bed and 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, which releases, fixes, on natural gas collecting hood and it is lift-off from seabed
The contact of 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 (9)
- The sea-bottom natural gas collection device that buoyancy tank circulating hot water pipeline built in 1. heats, it is characterised in that: including lash ship (5) and interior Empty natural 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) connects at the top of natural gas collecting hood, and the natural gas collecting hood is connected to lash ship (5) by marine riser (13) Bottom, the gas production pipe (12) are set in marine riser (13)；Natural gas collecting hood bottom surrounding is disposed with anchoring system, Pressure regulating system (3) are equipped in the bottom of natural gas collecting hood, the natural gas collects cover outer wall and is equipped with propulsion system (6), it is equipped with Auto-regulating System of Density of Heavy Medium system in the side wall of the natural gas collecting hood, is equipped with temperature inside the natural gas collecting hood and adjusts System (4) and agitation system (9), the humidity control system include heating plant (402), heat supplying pipeline (401), heat exchanger (403) and water return pipeline (404), the lash ship (5) are equipped with heating plant (402), are connected on the heating plant (402) Heat supplying pipeline (401), the heat supplying pipeline (401) pass through inside marine riser (13) to natural gas collecting hood, and the natural gas is received Several branch lines being connected with heat supplying pipeline (401) are equipped in collection cover, the branch line is equipped with several heat exchangers (403)；The branch line is frame structure identical with natural gas collection hood shape, and the branch line connects water return pipeline (404), the water return pipeline (404) passes through marine riser (13) and is connected to heating plant (402) on lash ship (5)；The density tune Section system includes buoyant module (201), for die block (202) and pneumatic circuit (203)；It is arranged on the natural gas collecting hood It is disposed between inside and outside layer shell several buoyant modules (201), the buoyant module (201) includes the interior empty van body of sealing, described It is set in cabinet electronic liquid level gauge (207), the cabinet is equipped with the inside and outside drainpipe (206) of connection and air inlet pipe (205), owns The air inlet pipe (205) of buoyant module (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 to mother for die block (202) On ship (5).
- 2. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as described in claim 1, feature exist In: the natural gas collecting hood includes shell (101), top platform (102), baffle (103) and hanging ring (104), the shell It (101) include ectonexine shell, the shell (101) hollow pyramid structure is set as at the top of the shell (101) Top platform (102) is sealedly connected with a circle ring baffle (103), the shell (101) on the bottom edge of the shell (101) Outer wall in the middle part of be equipped with several hanging rings (104)；The branch line is in pyramid frame structure in shell (101).
- 3. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as claimed in claim 2, feature exist In: the anchoring system is set to natural gas collecting hood bottom surrounding, and the anchoring system includes screw rod (801), motor (802), transmission device (803) and closed anchoring shell, the anchoring shell are fixed on baffle (103) top, in the anchoring shell It is fixed with motor (802), the motor (802) connects transmission device (803) and drives screw rod (801) rotary motion, institute State the bottom that screw rod (801) is pierced by anchoring shell.
- 4. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as claimed in claim 2, feature exist In: one end of the gas production pipe (12) is located at top platform (102) and is connected to inside natural gas collecting hood, and the other end is located at mother Natural gas storage device (7) are connected on ship (5)；Wherein gas production pipe (12), pneumatic circuit are equipped in marine riser (13) (203), heat supplying pipeline (401) and cable.
- 5. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as claimed in claim 2 or 3 or 4, Be characterized in that: the pressure regulating system (3) is set to the bottom of natural gas collecting hood, and the pressure regulating system (3) includes latent Water pump (301) and suction box (302), the suction box (302) are placed in inside natural gas collecting hood, and the immersible pump (301) is solid Due on natural gas collecting hood, the immersible pump (301) is connected to suction box (302) by water supply hose, the immersible pump (301) It is connected to outside natural gas collecting hood by outlet pipe.
- 6. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as claimed in claim 5, feature exist In: the inner lower of the natural gas collecting hood is equipped with agitation system (9), and the agitation system (9) includes driving (901) and water Fluidic device (902), the driving (901) are fixed on shell (101) inner wall, and the water jet device (902) is installed on driving It (901) can following vehicle movement on.
- 7. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as claimed in claim 5, feature exist In: the propulsion system (6) includes carrying platform, screw propeller and motor, and the carrying platform is fixed on natural gas The outer middle side part of collecting hood, motor connection screw propeller are mounted on carrying platform.
- 8. the sea-bottom natural gas collection device of built-in buoyancy tank circulating hot water pipeline heating as claimed in claim 7, feature exist In being equipped with monitoring system (10) in: the natural gas collecting hood, the monitoring system (10) include temperature and pressure monitoring device, And shell stress monitoring device, the temperature and pressure monitoring device are mounted on top platform (102) inside, several shell stress The shell (101) that monitoring device is mounted on natural gas collecting hood is external；The monitoring system (10), propulsion system (6), pressure tune Section 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.
- 9. a kind of sea of the sea-bottom natural gas collection device using built-in buoyancy tank circulating hot water pipeline heating according to any one of claims 8 Bottom gas hydrates 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 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, start-up temperature regulating system, heating plant (402) feeds hot water, heat into heat supplying pipeline (401) Water enters inside natural gas collecting hood along heat supplying pipeline (401) and branches to each branch line, makes the thermal energy of hot water in each branch Heat exchanger (403) on pipeline carries out heat exchange, improves the internal temperature of natural gas collecting hood, then through water return pipeline (404) It is back to heating plant (402)；When temperature value reaches preset value, control heating plant (402) stops hot-water supply；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 (902) 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.
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| 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 |
| CN108979538B (en) * | 2018-08-14 | 2019-09-17 | 沧州格锐特钻头有限公司 | A kind of combustible ice mine drilling bit |
| 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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