CN108049845A - A kind of non-diagenesis gas hydrates lifting method of sea-bottom shallow and device - Google Patents
A kind of non-diagenesis gas hydrates lifting method of sea-bottom shallow and device Download PDFInfo
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- CN108049845A CN108049845A CN201810106889.XA CN201810106889A CN108049845A CN 108049845 A CN108049845 A CN 108049845A CN 201810106889 A CN201810106889 A CN 201810106889A CN 108049845 A CN108049845 A CN 108049845A
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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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
Abstract
The invention discloses a kind of non-diagenesis gas hydrates lifting method of sea-bottom shallow and devices, for the non-diagenesis gas hydrates lifting of sea-bottom shallow, drill bit beats neck eye well, after reaching precalculated position, start compression pump, high pressure sea water drives screw motor rotation, and torque and rotating speed are passed to screw pump by universal shaft；Nozzle starts jet crushing, hydrate is collected by collection port, secondary crushing device and separator, second-time breakage and separation, the sand grains backfill after separating, hydrate slurry carry out post-processing by the solid controlling system that screw pump is given rise on ocean platform.The present invention has the following advantages：It is entire simple for process, the broken of the non-diagenesis hydrate of sea-bottom shallow, separation and lifting can be effectively realized；Screw pump device is compact-sized, small, and suction capacity is strong, smooth running, long working life；Upper passageway bridge and lower passageway bridge dexterously realize the pumping and lifting of seawater and hydrate slurry, save underground space.
Description
Technical field
The present invention relates to exploitation of gas hydrates technical field more particularly to the non-diagenesis gas waters of sea-bottom shallow
Close object lifting method and device.
Background technology
Gas hydrates are also known as " combustible ice ", by the hydrocarbon gas based on methane and water in certain temperature, pressure condition
" cage compound " of lower formation, white crystal structure.Gas hydrates particularly ocean hydrate is not yet to open at present
A kind of new energy of the reserves maximum of hair, reserves are equivalent to the energy reserves such as coal known to the whole world, oil and natural gas
Twice, but to realize that the effectively controllable business exploitation of hydrate is the problem that the current whole world faces.
The form that is primarily present of hydrate has sandrock-type, sandstone crack type, particulate crack type and decentralized, and wherein particulate is split
Gap type and decentralized hydrate account for the overwhelming majority.So far, it is in the gas hydrates sample acquired by China marine site
Non- diagenesis gas hydrates, the gas hydrates overwhelming majority that Global Success obtains also is non-diagenesis gas hydrates.
The non-diagenesis gas hydrates of deep water have the characteristics that large storage capacity, it is weak it is cementing, stability is poor, once the temperature of region, pressure
Power condition changes, it is possible to a large amount of of the non-diagenesis gas hydrates in seabed be caused to decompose, gasify and freely discharge, existed
Potential risks.Voltage drop method, heat injection method, chemical inhibitor method and CO in hydrate tradition recovery method2Replacement exploitation method etc.
Method has carried out polar region sandstone and marine site sandstone reservoir gas hydrates Short-Term Producing show-how verification, and security has
It waits to further investigate, and individual well test yield distance business exploitation thresholding also has very big distance.Therefore, for being stored in seabed table
The exploitation of deep water shallow-layer, weak cementing gas hydrates then needs to consider a kind of brand-new exploitation within several meters to 200 meters of layer
Pattern.It is shallow to be put forward for the first time deep water according to the sampling of world marine site hydrate and China marine site hydrate sampling situation by Zhou Shouwei etc.
Layer gas hydrates solid state fluidizing production technique reduces the environmental risk that shallow-layer decomposition of hydrate may be brought, reaches green
The purpose controllably exploited.But for after shallow-layer hydrate solid state fluidizing, the collection of mixture slurry, hydrate particle and sand grains
Separation, the lifting of hydrate slurry, there is presently no fairly perfect method and devices.
The content of the invention
For problems of the prior art, the object of the present invention is to provide a kind of non-diagenesis gas waters of sea-bottom shallow
Object lifting method and device are closed, the annular space of seawater injection bimetallic tube, seawater are entered screw rod horse by compression pump by upper passageway bridge
The inner cavity reached, and then the rotor of screw motor is driven to rotate, seawater is squeezed into lower passageway bridge, seawater changes runner and enters screw rod
Annular space outside pump, the seawater in annular space crush hydrate layer by injection stream, generate the mixture slurry of hydrate and sand grains；Together
When screw motor rotor coupled by universal shaft with the rotor center axis of screw pump, power and torque are passed into screw pump,
Screw pump rotation is driven, negative pressuren zone is formed in screw pump lower end；Mixture slurry enters secondary crushing device by collection port, will penetrate
Bulky grain after stream is broken is further ground into fine particle；Then by helix tube tangentially into separator, in separator
In moved in a manner of spiral vortex, contour stealth carries sand grains and is discharged by spigot, is backfilling into shaft bottom, and inward eddy carries hydrate slurry
It is discharged by overflow pipe, the hydrate slurry after discharge enters screw pump through being flared pipe nipple；Then hydrate slurry is in screw pump
The lower lifting upwards of effect, hydrate slurry is upwardly into the annular space outside screw motor by lower passageway bridge, then again by upper
Passageway bridge enters the inner tube of bimetallic tube, and the solid controlling system being finally pumped on ocean platform is further processed.
To achieve the above object, technical scheme is as follows：
One kind is mainly used for the non-diagenesis gas water of sea-bottom shallow for the non-diagenesis gas hydrates lifting method of sea-bottom shallow
Close the lifting of object, which is characterized in that the non-diagenesis gas hydrates lifting method of the sea-bottom shallow mainly includes following step
Suddenly：
Step 1：Start the compression pump on ocean platform, seawater is pumped into the annular space of bimetallic tube, seawater passes through upper bridge by annular space
I-V and III-V runner of formula passage enters screw motor；The rotor of seawater driving screw motor rotates in the stator, and by sea
Water squeezes into lower passageway bridge, and seawater enters the annular space outside screw pump by B-E the and C-H runners of lower passageway bridge；
Step 2：The seawater in annular space outside screw pump crushes hydrate layer by injection stream, generates hydrate particle and sand grains
Mixture slurry；Seawater in annular space and under the differential pressure action of screw pump lower end, mixture slurry pass sequentially through collection port, secondary
Breaker, helix tube, separator, carry out second-time breakage and separation, and the silt particle isolated is returned by the sediment outflow eye among drill bit
It fills out to shaft bottom, hydrate slurry is discharged from overflow pipe, enters screw pump by being flared pipe nipple；
Step 3：Under the action of screw pump, hydrate slurry is lifted upwards；Hydrate slurry reaches lower passageway bridge, and leads to
F-A the and G-D runners for crossing down passageway bridge enter annular space outside screw motor；In annular space of the hydrate slurry outside screw motor
It continues up lifting, and enters the inner tube of bimetallic tube by IV-II and VI-II runner of upper passageway bridge, be finally pumped into sea
Solid controlling system on foreign platform, is further processed.
A kind of device for being used to implement the non-diagenesis gas hydrates lifting method of sea-bottom shallow, including compression pump, solid controlling
System, bimetallic tube, upper passageway bridge, screw motor, lower passageway bridge, universal shaft, screw pump, nozzle, flaring pipe nipple, collection
Mouth, secondary crushing device, helix tube, separator, overflow pipe, sediment outflow eye, drill bit.
High-pressure pump is connected with the annular space of bimetallic tube, and solid controlling system is connected with the inner tube of bimetallic tube；Upper passageway bridge upper end connection
Connect bimetallic tube, lower end screw connection motor；The rotor lower end of screw motor passes through lower passageway bridge, and with universal shaft screw connection
The rotor center axis of pump；Lower passageway bridge upper end screw connection motor, lower end screw connection pump；The outer barrel of screw pump is disposed with spray
Mouth, screw pump lower end couple with flaring pipe nipple；Secondary crushing device upper end couples with flaring pipe nipple, and lower end couples with separator,
Collection port is disposed in the outer barrel of secondary crushing device, and by helix tube mixture slurry is made tangentially to flow into separator；Separation
Device upper end couples with secondary crushing device, and lower end couples with drill bit, and bit central has sediment outflow eye, the spigot phase with separator
It is logical, the backfill passage as the silt particle isolated；Overflow pipe in separator is through secondary crushing device center with being flared pipe nipple
Connection, as the overflow ducts of hydrate slurry, makes hydrate slurry enter screw pump, is lifted by screw pump, finally pumped
It is sent to solid controlling system and carries out post-processing.
The present invention has the following advantages：（1）It is entire simple for process, the non-diagenesis hydrate of sea-bottom shallow can be effectively realized
Broken, separation and lifting；（2）Screw pump device is compact-sized, small, and suction capacity is strong, smooth running, working life
It is long；（3）Upper passageway bridge and lower passageway bridge dexterously realize the pumping and lifting of seawater and hydrate slurry, save well
Down space.
Description of the drawings
Fig. 1 is the non-diagenesis gas hydrates lifting technology schematic diagram of sea-bottom shallow；
In figure, 1- solid controlling systems, 2- compression pumps, 3- ocean platforms, 4- bimetallic tubes, 5- riser pipes, 6- packers, the upper bridge-types of 7-
Passage, 8- stators, 9- rotors, 10- screw motors, 11- universal shafts, 12- rotor center axis, 13- stators, 14- rotors, 15- expand
Mouthful pipe nipple, 16- collection ports, 17- helix tubes, passageway bridge under 18-, 19- screw pumps, 20- nozzles, 21- secondary crushing devices,
22- overflow pipes, 23- separators, 24- drill bits, 25- sediment outflow eyes, 26- spigots.
Fig. 2 is upper passageway bridge schematic diagram；
In figure, I, II, III, IV, V, VI is respectively runner mouth title.
Fig. 3 is lower passageway bridge schematic diagram；
In figure, A, B, C, D, E, F, G, H are respectively runner mouth title.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings, and protection scope of the present invention is not limited to as described below：
The non-diagenesis gas hydrates lifting method of sea-bottom shallow described in present example mainly includes the following steps that（Such as Fig. 1
It is shown）：
Step 1：Riser pipe 5 is transferred, neck eye well is beaten using drill bit 24, when the drilling of drill bit 24 is to working depth, drill bit 24 stops
Only creep into；
Step 2：Start the compression pump 2 on ocean platform 3, seawater is transported to the annular space of bimetallic tube 4, the seawater in annular space passes through
Upper passageway bridge 7 changes runner and enters screw motor 10；
Step 3：The rotor 9 of seawater driving screw motor 10 rotates in stator 8, and seawater is squeezed into lower passageway bridge 18, and then
Change runner enters the annular space outside screw pump 19；
Step 4：The rotor 9 of screw motor 10 is coupled by universal shaft 11 with the rotor center axis 12 of screw pump 19, by torque and
Rotating speed passes to the rotor 14 of screw pump 19, and the rotor 14 of screw pump 19 is made to be rotated in stator 13, in 19 lower end shape of screw pump
Into negative pressuren zone；
Step 5：The seawater in annular space outside screw pump 19 generates hydrate and sand grains by 20 jet crushing hydrate layer of nozzle
Mixture slurry；
Step 6：The mixture slurry of hydrate and sand grains enters secondary crushing device 21 by collection port 16, after jet crushing
Bulky grain be further broken up into fine particle；
Step 7：Mixture slurry after second-time breakage tangentially enters separator 23 by helix tube 17, with spiral shell in separator 23
Vortex mode moves, and contour stealth carries sand grains and discharged by spigot 26, and shaft bottom is backfilling by the sediment outflow eye 25 among drill bit 24,
Inward eddy carries hydrate slurry and is discharged by overflow pipe 22, enters screw pump 19 through being flared pipe nipple 15；
Step 8：Under the action of screw pump 19, hydrate slurry is lifted upwards, and hydrate slurry reaches lower passageway bridge 18,
Change the annular space that runner is upwardly into outside screw motor 10；
Step 9：Hydrate slurry continues up lifting in the annular space outside screw motor 10, then is entered by upper passageway bridge 7
The inner tube of bimetallic tube 4 is finally pumped into the solid controlling system 1 of ocean platform 3, is further processed；
Riser pipe 5 is transferred, bimetallic tube 4 is separated with seawater, packer 6 is placed below the outside of riser pipe 5, by seawater
Layer is separated with hydrate layer, ensures that lower part exploitation space is closed state；
Drill bit 24 beats neck eye well, and when drilling is to working depth, drill bit 24 stops drilling, starts the compression pump on ocean platform 3
2, compression pump 2, which works, is transported to high pressure sea water the annular space of bimetallic tube 4, provides pressure head needed for entire lifting technology process；
When seawater reaches upper passageway bridge 7, I-V and III-V runner that upper passageway bridge 7 is passed through by annular space（As shown in Figure 2）
Into the inner cavity of screw motor 10, seawater forces the rotor 9 in screw motor 10 to be rotated in stator 8, so as to which seawater is downward
It is transported to lower passageway bridge 18, B-E the and C-H runners that seawater passes through lower passageway bridge 18（As shown in Figure 3）Into screw pump 19
Outer annular space；
The polished rod of the lower end elongation of the rotor 9 of screw motor 10 passes through universal shaft 11 and screw pump 19 through lower passageway bridge 18
Rotor center axis 12 couple, the torque and rotating speed that screw motor 10 is generated are transferred to screw pump 19 by universal shaft 11, make
The power resources lifted upwards for screw pump；
Seawater flows into the annular space outside screw pump 19 from lower passageway bridge 18, opens nozzle 20, carries out jet crushing hydrate layer, raw
Into hydrate and the mixture slurry of sand grains, the collecting action by collection port 16 enters secondary crushing device 21；
Bulky grain in mixture slurry is further ground into fine particle in secondary crushing device 21, passes through 17 spiral shell of helix tube
Rotation conveying, then tangentially enters in separator 23；
Mixture slurry is moved in separator 23 in a manner of spiral vortex, and due to centrifugal action, contour stealth carries sand grains by spigot
26 discharges are backfilling into shaft bottom by the sediment outflow eye 25 among drill bit 24, and inward eddy carries hydrate slurry and discharged by overflow pipe 22,
Through being flared pipe nipple 15 into the inner cavity of screw pump 19；
Passageway bridge 18 under hydrate slurry after separation reaches under the castering action of screw pump 19, passes through lower passageway bridge
18 F-A and G-D runners（As shown in Figure 3）Annular space into outside screw motor 10, hydrate slurry are upward along annulus access
Upper passageway bridge 7 is given rise to by screw pump 19, passes through IV-II and VI-II runner of upper passageway bridge 7（As shown in Figure 2）Into
The inner tube of bimetallic tube 4；
The solid controlling system 1 that the inner tube continuation of hydrate slurry along bimetallic tube 4 is given rise on ocean platform 3, does further
Processing.
A kind of device for being used to implement the non-diagenesis gas hydrates lifting method of sea-bottom shallow, including compression pump 2, solid controlling
System 1, riser pipe 5, packer 6, bimetallic tube 4, upper passageway bridge 7, screw motor 10, lower passageway bridge 18, universal shaft 11,
Screw pump 19, nozzle 20, flaring pipe nipple 15, collection port 16, secondary crushing device 21, helix tube 17, separator 23, overflow pipe
22nd, sediment outflow eye 25, drill bit 24；
Riser pipe 5 is placed in covering mud layer, using packer 6 outside riser pipe 5, forms enclosure space, can be incited somebody to action
Bimetallic tube 4 is isolated with seawater；
Compression pump 2 on ocean platform 3 is connected with the annular space of bimetallic tube 4, and seawater is pumped into annular space, is provided needed for lifting technology
Pressure head, the solid controlling system 1 on ocean platform 3 is connected with the inner tube of bimetallic tube 4, the hydrate slurry that recycling lifting comes up；
The upper end connection bimetallic tube 4 of upper passageway bridge 7, lower end screw connection motor 10, and the runner mouth I of upper passageway bridge 7,
III communicates with the annular space of upper end bimetallic tube 4, and runner mouth II is communicated with the inner tube of upper end bimetallic tube 4, runner mouth IV, VI and lower end spiral shell
Annular space outside bar motor 10 communicates, and runner mouth V is communicated with the inner cavity of lower end screw motor 10（As shown in Figure 2）；
The upper end of screw motor 10 couples with upper passageway bridge 7, and lower end couples with lower passageway bridge 18, the stator of screw motor 10
8 are fixed on inner cylinder, and 9 lower end of rotor extends part polished rod through lower passageway bridge 18, and pumps 19 with 11 screw connection of universal shaft
Rotor center axis 12, torque and rotating speed are passed into screw pump 19, the power resources as screw pump 19；
The upper end screw connection motor 10 of lower passageway bridge 18, lower end screw connection pump 19, and the runner of lower passageway bridge 18
Mouth A, D are communicated with the annular space outside upper end screw motor 10, and runner mouth B, C is communicated with the inner cavity of upper end screw motor 10, runner mouth
E, H is communicated with the annular space outside lower end screw pump 19, and runner mouth F, G is communicated with the inner cavity of lower end screw pump 19（As shown in Figure 3）, spiral shell
The outer barrel of bar pump 19 is disposed with nozzle 20, and the upper end of screw pump 19 couples with lower passageway bridge 18, lower end and flaring pipe nipple 15
It connects, the rotor center axis 12 of screw pump 19 is assemblied in the hollow rotor 14 of screw pump 19, and stator 13 is fixed on inner cylinder；
The upper end of secondary crushing device 21 couples with flaring pipe nipple 15, and lower end couples with separator 23, in secondary crushing device 21
Outer barrel be disposed with collection port 16, collect it is broken after mixture slurry, secondary crushing device 21 is by big in mixture slurry
Grain is ground into fine particle, and mixture slurry is tangentially flowed into separator 23 by helix tube 17；
The upper end of separator 23 couples with secondary crushing device 21, and lower end couples with drill bit 24, the spigot 26 of separator 23 with
The sediment outflow eye 25 at 24 center of drill bit communicates, the backfill passage as the silt particle isolated；
Overflow pipe 22 in separator 23 couples through 21 center of secondary crushing device with flaring pipe nipple 15, as hydrate slurry
Overflow ducts, hydrate slurry is made to enter screw pump 19, then the castering action through screw pump 19 is pumped on ocean platform 3
Solid controlling system 1, it is further to be handled.
The above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form is not to be taken as the exclusion to other embodiment, and available for various other combinations, modification and environment, and can be at this
In the text contemplated scope, it is modified by the technology or knowledge of above-mentioned introduction or association area.And those skilled in the art institute into
Capable modifications and changes do not depart from the spirit and scope of the present invention, then all should be in the protection domain of appended claims of the present invention
It is interior.
Claims (6)
1. one kind is used for the non-diagenesis gas hydrates lifting method of sea-bottom shallow, which is characterized in that the sea-bottom shallow is non-
Diagenesis gas hydrates lifting method mainly includes the following steps that：
Step 1：Start the compression pump on ocean platform, seawater is pumped into the annular space of bimetallic tube, seawater passes through upper bridge by annular space
I-V and III-V runner of formula passage enters screw motor；The rotor of seawater driving screw motor rotates in the stator, and by sea
Water squeezes into lower passageway bridge, and seawater enters the annular space outside screw pump by B-E the and C-H runners of lower passageway bridge；
Step 2：The seawater in annular space outside screw pump crushes hydrate layer by injection stream, generates hydrate particle and sand grains
Mixture slurry；Seawater in annular space and under the differential pressure action of screw pump lower end, mixture slurry pass sequentially through collection port, secondary
Breaker, helix tube, separator, carry out second-time breakage and separation, and the silt particle isolated is returned by the sediment outflow eye among drill bit
It fills out to shaft bottom, hydrate slurry is discharged from overflow pipe, enters screw pump by being flared pipe nipple；
Step 3：Under the action of screw pump, hydrate slurry is lifted upwards；Hydrate slurry reaches lower passageway bridge, and leads to
F-A the and G-D runners for crossing down passageway bridge enter annular space outside screw motor；In annular space of the hydrate slurry outside screw motor
It continues up lifting, and enters the inner tube of bimetallic tube by IV-II and VI-II runner of upper passageway bridge, be finally pumped into sea
Solid controlling system on foreign platform, is further processed.
2. a kind of device for the non-diagenesis gas hydrates lifting method of sea-bottom shallow described in claim 1, feature
It is, the non-diagenesis gas hydrates lifting device of the sea-bottom shallow includes compression pump, solid controlling system, riser pipe, envelope
Every device, bimetallic tube, upper passageway bridge, screw motor, lower passageway bridge, universal shaft, screw pump, nozzle, flaring pipe nipple, collection
Mouth, secondary crushing device, helix tube, separator, overflow pipe, sediment outflow eye, drill bit；Solid controlling system is connected with the inner tube of bimetallic tube,
Compression pump is connected with the annular space of bimetallic tube；The upper passageway bridge of lower end connection of bimetallic tube, the lower end screw connection of upper passageway bridge
Motor, the lower passageway bridge of lower end connection of screw motor, the lower end screw connection pump of lower passageway bridge, the lower end connection of screw pump
Pipe nipple is flared, is flared the lower end connection secondary crushing device of pipe nipple, secondary crushing device lower end coupling separator, in separator
Overflow pipe couples through secondary crushing device center with flaring pipe nipple, the spigot of separator and the sediment outflow eye phase of bit central
It is logical.
3. the device of the non-diagenesis gas hydrates lifting method of sea-bottom shallow, feature are used for as described in claim 2
It is, upper passageway bridge upper end couples bimetallic tube, lower end screw connection motor, and upper passageway bridge runner mouth I, III and upper end
The annular space of bimetallic tube communicates, and runner mouth II is communicated with the inner tube of upper end bimetallic tube, outside runner mouth IV, VI and lower end screw motor
Annular space communicates, and runner mouth V is communicated with the inner cavity of lower end screw motor.
4. the device of the non-diagenesis gas hydrates lifting method of sea-bottom shallow, feature are used for as described in claim 2
It is, screw motor upper end couples with upper passageway bridge, and lower end couples with lower passageway bridge, in the stator of screw motor is fixed on
Cylinder, rotor lower end extends part polished rod through lower passageway bridge, and the rotor center axis pumped with universal shaft screw connection, will turn round
Square and rotating speed pass to screw pump.
5. the device of the non-diagenesis gas hydrates lifting method of sea-bottom shallow, feature are used for as described in claim 2
It is, lower passageway bridge upper end screw connection motor, lower end screw connection pump, and lower passageway bridge runner mouth A, D and upper end
Annular space outside screw motor communicates, and runner mouth B, C is communicated with the inner cavity of upper end screw motor, runner mouth E, H and lower end screw pump
Outer annular space communicates, and runner mouth F, G is communicated with the inner cavity of lower end screw pump.
6. the device of the non-diagenesis gas hydrates lifting method of sea-bottom shallow, feature are used for as described in claim 2
It is, screw pump upper end couples with lower passageway bridge, and lower end couples with flaring pipe nipple, and the rotor center axis of screw pump is assemblied in spiral shell
Bar is pumped in hollow rotor, and stator is fixed on inner cylinder.
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| CN201810106889.XA CN108049845B (en) | 2018-02-02 | 2018-02-02 | Method and device for lifting non-diagenetic natural gas hydrate in shallow seabed layer |
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| CN201810106889.XA CN108049845B (en) | 2018-02-02 | 2018-02-02 | Method and device for lifting non-diagenetic natural gas hydrate in shallow seabed layer |
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| CN108756828A (en) * | 2018-05-25 | 2018-11-06 | 西南石油大学 | Hydrate solid state fluidizing recovery method and system under the conditions of underbalance reacting cycle |
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| CN111236894A (en) * | 2020-01-16 | 2020-06-05 | 西南石油大学 | Seabed shallow layer natural gas hydrate exploitation device |
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