CN202370492U - Gas lift exploitation device for submarine natural gas hydrates - Google Patents
Gas lift exploitation device for submarine natural gas hydrates Download PDFInfo
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- CN202370492U CN202370492U CN201120503682XU CN201120503682U CN202370492U CN 202370492 U CN202370492 U CN 202370492U CN 201120503682X U CN201120503682X U CN 201120503682XU CN 201120503682 U CN201120503682 U CN 201120503682U CN 202370492 U CN202370492 U CN 202370492U
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- gas
- pipeline
- exploitation
- gas production
- valve
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
Abstract
The utility model discloses a gas lift exploitation device for submarine natural gas hydrates. A gas filling pipeline is filled with gas from the sea surface; the composite force of the force of the filled gas on a membrane and the force of liquid in a gas exploitation pipeline on a valve ball is enabled to be greater than the elastic force of a spring; a valve rod drives the valve ball to leave from a valve seat; the gas exploitation pipeline is filled with the filled gas to reduce the density of the liquid in the gas exploitation pipeline; an inhalant current is formed in the position of an inlet on the gas exploitation pipeline by pressure difference between the pressure out of the gas exploitation pipeline and the pressure in the gas exploitation pipeline; and the inhalant current inhales natural gas hydrate particles in a submarine natural gas hydrate and silt mixing layer and flows into a separation and storage system on a gas exploitation platform or a ship on the sea surface. The continuous exploitation of the submarine natural gas hydrates is realized, the demand quantity of the filled gas is low, the running cost is low, the low-abundance natural gas hydrates dispersed on the seabed are suitably exploited, and the environment cannot be influenced. The gas lift exploitation device has the advantages of simple structure and stable working state.
Description
Technical field
The utility model relates to through the process units from sea gas injecting mining sea bed gas hydrate to the gas production pipeline.
Background technology
The reserves of sea bed gas hydrate are huge, and the traditional natural gas hydrate exploitation technology mainly comprises solids production method, hydraulic hoisting method, thermal excitation extraction system, microwave extraction system.For example: Chinese patent number is 200710168759.0, name is called " a kind of exploitation method for sea bed gas hydrate and device " disclosed solids production method; Suck the gas hydrates of solid form with sea bottom hose; And pass through the seabed terminal slurry transportation is arrived the sea, utilize high temperature seawater to decompose the gas hydrates that collect then.The hydraulic hoisting method is to use the seabed relay pump to promote the hydrate of heterogeneous mixed flow; And then with hot water decomposition water compound; This method need be imported the seabed with electric current and drive relay pump; Need to consume significant amount of energy, and the insulating properties of cable connector is had relatively high expectations, the undersea device complex structure, running gear is many, production fluid is unstable, equipment dependability is low.One Chinese patent application number is 200910235236.2, name is called " a kind of exploitation method for sea bed gas hydrate " and adopts the thermal excitation extraction system; The main exploitation object of this method is the gas hydrates in the rock stratum, seabed; Need to bore two mouthfuls of wells; Cost is high, technological process is complicated, less economical, and efficiency of utilization is low, heating region is little.In addition; One Chinese patent application number is 200910194333.1, name is called " a kind of natural gas hydrate microwave in-situ development system that utilizes the wind energy power supply " and has introduced the microwave exploitation method of utilizing the wind energy power supply; Utilize the electric current of wind-driven generator to adopt microwave to heat in the down-hole; This method heating region is little, and the microwave penetration rate is low, and equipment life is shorter.
In sum; The exploitation method of existing gas hydrates and equipment all reckon without the characteristics that gas hydrates storage abundance is low, distribution area is wide, spreading depth is thin, for the energy that how to make full use of nature the gas hydrates on surface, seabed are collected the sea and all do not take in.Need to build the seabed terminal in the exploitation, be lowered to microwave generator or bore Multilateral Wells, technological process is complicated.
Summary of the invention
The purpose of the utility model is for overcoming the deficiency of above-mentioned background technology; Based on the gaslift technology comparatively ripe in the exploitation by land and the phase transformation theory of natural gas, propose a kind of simple in structure, the interior movable part of runner is few, gas hydrates production phase is adjustable, cost of winning is cheap, floor space is little, be applicable to the sea bed gas hydrate production by gas lift device of deep water.
The technical scheme that the utility model adopts is: sea gas production platform or boats and ships are provided with the separation of natural gas and the storage and the compression system of stocking system and injecting gas; Separation is connected with the outlet of stocking system with the gas production pipeline, and the gas production pipeline is stretched in sea bed gas hydrate and silt mixed layer through the gas production entrance; The middle part of gas production pipeline is connected storage and compression system through several gas injection valves with gas injecting pipe; Each gas injecting pipe upper end all connects storage and compression system, and the lower end all connects the gas production pipeline through a gas injection valve, and gas injection valve outside is a housing; The bottom of housing connects valve seat; Have in the housing inner chamber is separated into the diaphragm of two chambers up and down, be provided with spring in the upper chamber, the spring lower end connects diaphragm, the upper end is supported in case top; Have an end vertically to connect the valve rod of diaphragm, other end connection valve ball in the lower chambers, valve ball is located on the valve seat; Lower chambers is communicated with gas injecting pipe, and valve seat is communicated with the gas production pipeline.
The beneficial effect of the utility model is:
1, rely on the gravitational potential energy of seawater self to cause gas production pipeline inside and outside differential pressure and the current exploitation sea bed gas hydrate that forms, little to the injecting gas demand, running cost is cheap, suitable exploitation intersperses among the low abundance gas hydrates on the sea bed.
2, need not to increase down-hole heater or inject thermal medium, conserve energy to sea bed; The natural gas that pit shaft is injected on the sea is reclaimed fully, environment is not impacted.
3, there are not movable part and electroheat member in the well-sinking of sea, simple in structure, stable working state.
4, the sea bed degree of depth of exploitation position is unrestricted, is particularly useful for the deep-sea exploitation of gas hydrate.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further explain;
Fig. 1 is the composition sketch map of the utility model;
Fig. 2 is the structure enlarged diagram of gas production entrance 7 among Fig. 1;
Fig. 3 is the structure enlarged diagram of gas injection valve 5 among Fig. 1;
Among the figure: 1. sea gas production platform or boats and ships; 2. separate and stocking system; 3. store and compression system; 4. gas injecting pipe; 5. gas injection valve; 6. gas production pipeline; 7. gas production entrance; 8. seawater; 9. sea bed gas hydrate and silt mixed layer; 10. horn mouth; 11. screen casing; 12. spring; 13. gas injection valve chest; 14. diaphragm; 15. valve ball; 16. valve seat; 17. valve rod.
The specific embodiment
Referring to Fig. 1, the separation of natural gas and the storage and the compression system 3 of stocking system 2 and injecting gas are installed on sea gas production platform or boats and ships 1.Gas pressurization system in storage and the compression system 3 can be centrifugal pump, also can be the explosion-proof gas compression pump of other types.The separation of natural gas is connected with the outlet of stocking system 2 with gas production pipeline 6.Gas production pipeline 6 stretches into seawater downwards 8 times, and the end opening of gas production pipeline 6 is gas production entrances 7, and gas production pipeline 6 is stretched in sea bed gas hydrate and silt mixed layer 9 through gas production entrance 7.Gas production pipeline 6 is passages that sea bed gas hydrate, water and silt mixture flow to the sea, has some metals or nonmetal or compound pipeline complex pipeline to be formed by connecting through box cupling, also can use coiled tubing.Gas production pipeline 6 can be lowered to certain-length by any appointment orientation to sea bed on sea gas production platform or boats and ships 1; According to platform or boats and ships area requirement to the sea bed gas hydrate exploitation; Under the condition that intensity allows; Gas production pipeline 6 can be long arbitrarily, and can some lie low in the seabed.But flow control device such as choke valve under the mounting shaft in the gas production pipeline 6.
Several gas injecting pipes 4 and gas injection valve 5 are installed according to the needs of production practice in optional position at gas production pipeline 6 middle parts.Gas production pipeline 6 is connected storage and compression system 3 on sea gas production platform or the boats and ships 1 through gas injection valve 5 with gas injecting pipe 4.Gas injecting pipe 4 is formed by connecting through box cupling some metals or nonmetal or compound pipeline complex pipeline, also can use coiled tubing, and gas injecting pipe 4 upper ends connect and store and compression system 3, and the lower end links to each other with gas production pipeline 6 through gas injection valve 5, is the passage of sea injecting gas.
Referring to Fig. 2; Gas production entrance 7 is connected with gas production pipeline 6 through screw thread; The structure that gas production entrance 7 can adopt horn mouth 10 and screen casing 11 to connect to form as required, the front end of gas production entrance 7 is horn mouths 10, can increase the area of flow section; The rear end of gas production entrance 7 is screen casings 11 of sealing, and screen casing 11 can be connected through thread forms with horn mouth 10.On screen casing 11 limit walls, have some eyelets, purpose is to filter out pasture and water and the bigger seabed foreign material of various sizes.The box cupling internal diameter of the external diameter of screen casing 11 and gas production pipeline 5 is complementary.
Referring to Fig. 3, gas injection valve 5 is connected with gas production pipeline 6 with gas injecting pipe 4 through the screw thread at two ends respectively.Gas injection valve 5 outsides are housings 13, and the bottom of housing 13 connects valve seat 16, and spring 12, diaphragm 14, valve ball 15 and valve rod 17 are arranged in housing 13 inner chambers.Diaphragm 14 is separated into two chambers up and down with whole housing 13 inner chambers, and mounting spring 12 in upper chamber, and the lower end of spring 12 connects diaphragm 14, and the upper end of spring 12 is supported on housing 13 tops.In the lower chambers of housing 13, valve rod 17 1 ends vertically connect diaphragm 14, and the other end connects valve ball 15, and valve ball 15 is installed on the valve seat 16.Gas injecting pipe 4 is communicated with the lower chambers of housings 13, makes the gas in the gas injecting pipe 4 act on diaphragm 14, and valve seat 16 is communicated with gas production pipeline 6, makes liquid effects in the gas production pipeline 6 in valve ball 15.When the gas in the gas injecting pipe 4 acts on power and the liquid effects in the gas production pipeline 6 on the diaphragm 14 making a concerted effort during elastic force greater than spring 12 on valve ball 15; Diaphragm 14 moves up in housing 13 inner chambers; Valve rod 17 drives valve ball 15 and lifts off a seat 16; At this moment, gas injecting pipe 4 is communicated with gas production pipeline 6, and gas can get into gas production pipeline 6.After gas gets into gas production pipeline 6; Reduction along with gas production pipeline 6 pressure; The power that fluid acts on the valve ball 15 in the gas production pipeline 6 descends, when gas in this power and the gas injecting pipe 4 act on the diaphragm 14 with joint efforts less than the elastic force of spring 12 time, gas injection valve 5 cuts out automatically.
During the exploitation sea bed gas hydrate; To gas injecting pipe 4, inject gases such as natural gas, nitrogen or carbon dioxide from the sea, behind gas injection valve 5, get into air collecting pipe road 6, reduce the density of fluid in the gas production pipeline 6; Through reducing in the gas production pipeline 6 from the heavy position pressure reduction of the fluid column on the sea that enters the mouth; Thereby reduce entrance pressure, the utilization pipe is outer, the pipe internal pressure differences forms the suction current at gas production entrance 7 places, sucks the gas hydrate particle on the sea bed.Specifically: the storage of the injecting gas of installing on sea gas production platform or the boats and ships 1 and compression system 3 are from gas injecting pipe 4 injecting gas.When the gross pressure of gas that injects in the gas injection valve 5 and liquid receives the pressure of spring 12 greater than gas injection valve 3 diaphragms 14 places; Valve rod 17 drives valve ball 15 and lifts off a seat 16; Injecting gas in the gas injecting pipe 4 injects in the gas production pipeline 6 that is full of seawater through gas injection valve 5; The density of mixing material in the gas production pipeline 6 is diminished; Under the pressure effect of the seawater 8 of gas production pipeline 6 outsides, sea bed gas hydrate and silt mixture 9 from gas production entrance 7 get into the gas production pipelines 6 continuously and flow to the sea natural gas separate with stocking system 2 in, realize the continuous exploitation of sea bed gas hydrate.The part natural gas of exploiting out is defeated outward, and another part natural gas injects gas production pipeline 6 and recycles, and isolated silt returns the row seabed.
According to the requirement of exploitation purpose and subsequent technique, can adjust the average pressure in the gas production pipeline 6 through regulating gas flow and gas injection valve 5 positions of injecting gas injecting pipe 4, thus adjustment gas hydrates output and the phase in pit shaft.The position of injection valve 5, quantity can be according to sea water advanced design optimizations with injection rate and pressure that gas is arranged.The position of gas production entrance 7 can be exploited any adjusting of position through the motion of sea gas production platform or boats and ships, and can adjust the radial orientation of exploitation through the whirligig of sea platform or boats and ships, is convenient to exploit seabed as much as possible area.
Claims (2)
1. sea bed gas hydrate production by gas lift device; Sea gas production platform or boats and ships (1) are provided with the separation of natural gas and the storage and the compression system (3) of stocking system (2) and injecting gas; It is characterized in that: separation is connected with the outlet of stocking system (2) with gas production pipeline (6), and gas production pipeline (6) is stretched in sea bed gas hydrate and silt mixed layer (9) through gas production entrance (7); The middle part of gas production pipeline (6) is connected storage and compression system (3) through several gas injection valves (5) with gas injecting pipe (4); Each gas injecting pipe (4) upper end all connects storage and compression system (3); The lower end all connects gas production pipeline (6) through a gas injection valve (5); Said gas injection valve (5) outside is a housing (13), and the bottom of housing (13) connects valve seat (16), has in the housing (13) inner chamber is separated into the diaphragm (14) of two chambers up and down; Be provided with spring (12) in the upper chamber, spring (12) lower end connects diaphragm (14), the upper end is supported in housing (13) top; Have an end vertically to connect the valve rod (17) of diaphragm (14), other end connection valve ball (15) in the lower chambers, valve ball (15) is located on the valve seat (16); Lower chambers is communicated with gas injecting pipe (4), and valve seat (16) is communicated with gas production pipeline (6).
2. device according to claim 1 is characterized in that: said gas production entrance (7) is connected to form by the horn mouth (10) of front end and the screen casing (11) of rear end, and screen casing (11) Bian Bishang has several holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120503682XU CN202370492U (en) | 2011-12-07 | 2011-12-07 | Gas lift exploitation device for submarine natural gas hydrates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120503682XU CN202370492U (en) | 2011-12-07 | 2011-12-07 | Gas lift exploitation device for submarine natural gas hydrates |
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| Publication Number | Publication Date |
|---|---|
| CN202370492U true CN202370492U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120503682XU Expired - Fee Related CN202370492U (en) | 2011-12-07 | 2011-12-07 | Gas lift exploitation device for submarine natural gas hydrates |
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| CN (1) | CN202370492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547599A (en) * | 2018-04-09 | 2018-09-18 | 上海飞舟博源石油装备技术有限公司 | The mining system and recovery method of seabed combustible ice |
-
2011
- 2011-12-07 CN CN201120503682XU patent/CN202370492U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547599A (en) * | 2018-04-09 | 2018-09-18 | 上海飞舟博源石油装备技术有限公司 | The mining system and recovery method of seabed combustible ice |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20141207 |
|
| EXPY | Termination of patent right or utility model |