CN207194865U - A kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well - Google Patents
A kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well Download PDFInfo
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- CN207194865U CN207194865U CN201720087527.1U CN201720087527U CN207194865U CN 207194865 U CN207194865 U CN 207194865U CN 201720087527 U CN201720087527 U CN 201720087527U CN 207194865 U CN207194865 U CN 207194865U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The utility model belongs to deep geothermal heat can be with the systems technology field of hot dry rock, U-shaped well is docked more particularly to a kind of large span for deep geothermal heat exploitation is horizontal, docked by the first level section of injection well with the second horizontal section of producing well and form large U type well, using arcuate structure, casing programme is not easy to be destroyed for the corner of large U type well；Joint welding is more beneficial in horizontal section docking simultaneously, original coarse butt-joint process is solved, solves the problems, such as that gap can not seal, prevent the loss of recirculated water in pipeline；In addition, the large span that the utility model is used for deep geothermal heat exploitation horizontal dock U-shaped well and also solves the problems such as recharge rate present in prior art is low, subterranean strata destroys, recirculated water leakage loss is lost, geothermal energy resources cannot be utilized effectively caused by water lift high energy consumption, and the small grade of high-temperature stratum contact surface etc..
Description
Technical field
The utility model belongs to deep geothermal heat can be with the systems technology field of hot dry rock, and in particular to one kind is with being used for deep layer
The large span of heat exploitation is horizontal to dock U-shaped well.
Background technology
The relevant new energy report display of the United Nations：Global geothermal energy resources total resources, equivalent to global resources total flow
450,000 times.The decay of radioactive element is the main source of earth heat energy.The earth of motion constantly stores up and discharged energy
Amount.Scattered and disappeared every year by heat transfer, volcanic eruption, earthquake, the substantial amounts of energy of release such as hot spring.Continental crust general thickness is 30
~ 70 kilometers, geothermic gradient gradually increases from the top down, general every lower 100m, and temperature raises 3 DEG C, geothermal energy type underground heat buried depth to ground
Under thousands of rice, inside in the absence of fluid or only a small amount of underground fluid high heat rock mass.Because substantial amounts of geothermal energy type underground heat obtains
Utilized less than effective, cause a large amount of losses and waste of the energy.
In recent years, hot dry rock causes the extensive concern of various circles of society as a kind of buried cleaning geothermal energy in underground.
But geothermal energy production technique and immature at present, geothermal is generally using the small-bore U-tube of tripping in individual well
Mode, as shown in Fig. 2 by the way that in U-tube a port filling heat-conductive fluid, heat-conducting fluid flows through geothermal layer again from other end stream
Heat is reached into ground when going out；The singel well system using individual well due to being operated, temperature heating after small with high-temperature stratum contact surface
Requirement is not often reached, pipe resistance being present, big flow is small and the low shortcoming of geothermal energy utilization rate.
Another kind is applied to the geothermal well of deep geothermal heat exploitation, is the small u-shaped well formed using " straight well+horizontal well ", such as
Shown in Fig. 3, the butted part of well is using right angle destructiveness to wearing technique, and exist a little has deviation to wearing, and gap can not
The problem of sealing, if there is crack on stratum, the problems such as recirculated water leakage loss is lost in pipeline can be caused.
Utility model content
In order to solve, recharge rate present in prior art is low, subterranean strata destroys, recirculated water leakage loss is lost, water lift energy consumption
Height, and the small grade of high-temperature stratum contact surface caused by wait geothermal energy resources cannot effectively utilize, and small u-shaped well exist use
Be right angle destructiveness to wearing technique, the problem of exist a little has deviation to wearing, and gap can not seal, if there is crack on stratum,
The problems such as recirculated water leakage loss is lost in pipeline can be caused, the invention provides a kind of large span level for deep geothermal heat exploitation is right
Connect U-shaped well.The technical problem to be solved in the present invention is achieved through the following technical solutions：
A kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well, including injection well and producing well, the injection
Well includes the first vertical section, first level section, and connects the first the first arc for connecing vertical section and first level section
Section；The producing well includes the second vertical section, the second horizontal section, and the second vertical section of connection and the second horizontal zone
Second curved section of section, the first vertical section, first level section and first curved section are structure as a whole；Described
Two vertical sections, the second horizontal section and the second curved section are structure as a whole；The injection well and producing well pass through the first water
Flat section docks with the second horizontal section forms large U type well；Under the lower end of the first vertical section, the second vertical section
End, first level section, the second horizontal section, the first curved section and the second curved section are located in underground heat rock stratum；
The inwall of the injection well and producing well is respectively equipped with sleeve pipe, and the sleeve pipe of injection well and the sleeve pipe level of producing well are right
Connect, joint is connected by welded seal；Cement layer is filled between described sleeve pipe and underground heat rock stratum, in underground heat rock stratum
Cement layer is heat conduction cement layer, and the cement layer on underground heat rock stratum is insulating cement layer.
Further, the well depth of the U-shaped well is 3000m, and the horizontal range between injection well and producing well is at least
600m。
Further, the horizontal range between the injection well and producing well is 800m.
Further, the height of insulating cement layer is earth's surface to underground 1000m；The height of heat conduction cement layer is underground 1000
~3000m。
Further, the heat conduction cement layer is 1.89g/cm3 by density, and API dehydrations are less than 100ml cement mortar system
Into.
Further, described sleeve pipe is that thermal conductivity factor is more than 100W/'s (m.k) and corrosion resistant steel pipe.
The beneficial effects of the utility model：
The horizontal U-shaped well of docking of large span that the utility model is used for deep geothermal heat exploitation is the first level by injection well
Section docks with the second horizontal section of producing well forms large U type well, and the corner of large U type well is using arcuate structure, well
Body structure is not easy to be destroyed；Joint welding is more beneficial in horizontal section docking simultaneously, solves original coarse docking
Technique, solve the problems, such as that gap can not seal, prevent the loss of recirculated water in pipeline；In addition, the utility model is with being used for deep layer
The horizontal U-shaped well of docking of large span of heat exploitation also solves low recharge rate present in prior art, subterranean strata destruction, recirculated water
Leakage loss is lost, water lift high energy consumption, and cannot effectively utilize the problems such as of geothermal energy resources such as caused by the small grade of high-temperature stratum contact surface.
The utility model is described in further details below with reference to drawings and Examples.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the schematic diagram of the small-bore U-tube of the tripping in individual well that geothermal generally uses in the prior art；
Fig. 3 is the small u-shaped well for being used for deep geothermal heat exploitation in the prior art；
In figure：1st, injection well；2nd, producing well；3rd, sleeve pipe；4th, heat conduction cement layer；5th, insulating cement layer；6th, joint；101、
First vertical section；102nd, first level section；103rd, the first curved section；201st, the second vertical section；202nd, second is horizontal
Section；203rd, the second curved section.
Embodiment
For the technological means and effect that the utility model is reached predetermined purpose and taken is expanded on further, below in conjunction with accompanying drawing
And embodiment describes in detail as follows to specific embodiment of the present utility model, architectural feature and its effect.
A kind of large span horizontal docking U-shaped well of as shown in Figure 1 for deep geothermal heat exploitation, including injection well 1 and life
Well 2 is produced, injection well 1 includes the first vertical section 101, first level section 102, and even first connects vertical section 101 and the
First curved section 103 of one horizontal section 102；Producing well 2 includes the second vertical section 201, the second horizontal section 202, with
And the second curved section 203 of the second vertical horizontal section 202 of section 201 and second of connection, the first vertical section 101, first
The curved section 103 of horizontal section 102 and first is structure as a whole；Second vertical section 201, the second horizontal section 202 and second
Curved section 203 is structure as a whole；Injection well 1 and producing well 2 are right by first level section 102 and the second horizontal section 202
Connect and form large U type well；The lower end of first vertical section 101, the lower end of the second vertical section 201, first level section 102,
Two horizontal sections 202, the first curved section 103 and the second curved section 203 are located in underground heat rock stratum.
The inwall of injection well 1 and producing well 2 is respectively equipped with sleeve pipe 3, sleeve pipe 3 be thermal conductivity factor be more than 100W/'s (m.k) and
Corrosion resistant steel pipe；The sleeve pipe of injection well 1 and the horizontal docking of the sleeve pipe of producing well 2, joint 6 are connected by welded seal；Institute
State and cement layer is filled between sleeve pipe 3 and underground heat rock stratum, the cement layer in underground heat rock stratum is heat conduction cement layer 4, positioned at ground
Cement layer on hot rock stratum is insulating cement layer 5.
The well depth of U-shaped well is 3000m, and the horizontal range between injection well and producing well is at least 600m, preferably 800m.
Cement layer is filled between sleeve pipe 3 and underground heat rock stratum, the cement layer in underground heat rock stratum is heat conduction cement layer 4,
Be advantageous in the heat-conducting fluid that conducts the heat of underground heat rock stratum into sleeve pipe；Cement layer on underground heat rock stratum is insulation water
Mud layer 5, the thermal loss for preventing the heat-conducting fluid circulated from underground heat rock stratum from carrying；Heat conduction cement layer 4 and insulating cement simultaneously
Layer 5 also has the function that solidification.
The height of insulating cement layer 5 is earth's surface to underground 1000m；The height of heat conduction cement layer 4 is 1000 ~ 3000m of underground.
Heat conduction cement layer is 1.89g/cm3 by density, and cement mortar of the API dehydrations less than 100ml is made.
Large span of the present utility model for deep geothermal heat exploitation is horizontal to dock U-shaped well, and structure is " horizontal well+level
The large U type well that well " is formed, the butted part of well dock guide device, and sealing using horizontal segment guiding docking, sleeve pipe
The techniques such as welding；In well-digging using injection well and producing well downward drilling well simultaneously, when beating to 2600 meters of depth, to horizontal direction
Bending continues drilling well, is then penetrated in horizontal section；After injection well and producing well tripping in sleeve pipe, pair of the sleeve pipe in horizontal section
Welded by using pit robot at the place of connecing；Solve pair of well existing for the small u-shaped well of existing " well straight well+horizontal well " composition
The right angle destructiveness that socket part point uses a little has deviation to wearing technique to wearing, and gap can not seal, and is split if stratum has
Gap, the problems such as being lost according to the leakage loss into recirculated water in pipeline.
In addition, the horizontal U-shaped well of docking of large span that the utility model is used for deep geothermal heat exploitation also solves in the prior art
Existing recharge rate is low, subterranean strata destroys, recirculated water leakage loss is lost, water lift high energy consumption, and high-temperature stratum contact surface is small etc. leads
The problems such as waiting geothermal energy resources effectively to utilize of cause.
Large span of the present utility model for deep geothermal heat exploitation is horizontal to dock U-shaped well, when in the injection well in U-shaped well
Hot fluid is taken in injection（Such as water）When, when water is by the heat accumulation rock stratum of U-shaped well, the heat of heat accumulation rock stratum heats rapidly water, quilt
The water of heating is sucked up to ground along producing well, and terrestrial cells are heated or carry out other in the heating cycle system of ground surface end
Heat utilization；The water that heat exchange was carried out through ground circulation is carried out again by Vertical Well into deep geothermal heat heat transfer root system system
Heat transfer, circulated heat transmission system is formed with this.
Large span of the present utility model for deep geothermal heat exploitation is horizontal to dock U-shaped well, and single U-shaped well area of heat-supply service can
Up to 7~100,000 square metres, the fluid in well can be heated to 150 DEG C, the life-span is 50 years, and its running cost is far below
The running cost of the heating systems such as municipal heat supply, natural gas, deep earth source heat pump, it is a kind of environmentally friendly, efficient and inexpensive underground heat
Conduction utilizes system.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (6)
1. a kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well, it is characterised in that：Including injection well（1）And life
Produce well（2）, the injection well（1）Including the first vertical section（101）, first level section（102）, and even first connect vertically
Section（101）With first level section（102）The first curved section（103）；The producing well（2）Including the second vertical section
（201）, the second horizontal section（202）, and the second vertical section of connection（201）With the second horizontal section（202）The second arc
Shape section（203）, the first vertical section（101）, first level section（102）With the first curved section（103）It is integrated
Structure；The second vertical section（201）, the second horizontal section（202）With the second curved section（203）It is structure as a whole；Institute
State injection well（1）And producing well（2）Pass through first level section（102）With the second horizontal section（202）Docking forms large U type
Well；The first vertical section（101）Lower end, the second vertical section（201）Lower end, first level section（102）, second
Horizontal section（202）, the first curved section（103）And second curved section（203）In underground heat rock stratum；
The injection well（1）And producing well（2）Inwall be respectively equipped with sleeve pipe（3）, injection well（1）Sleeve pipe and producing well（2）
The horizontal docking of sleeve pipe, joint（6）Connected by welded seal；Described sleeve pipe（3）Cement is filled between underground heat rock stratum
Layer, the cement layer in underground heat rock stratum is heat conduction cement layer（4）, the cement layer on underground heat rock stratum is insulating cement layer
（5）.
2. the large span according to claim 1 for deep geothermal heat exploitation is horizontal to dock U-shaped well, it is characterised in that：Institute
The well depth for stating U-shaped well is 3000m, and the horizontal range between injection well and producing well is at least 600m.
3. the large span according to claim 2 for deep geothermal heat exploitation is horizontal to dock U-shaped well, it is characterised in that：Institute
It is 800m to state the horizontal range between injection well and producing well.
4. the large span according to claim 3 for deep geothermal heat exploitation is horizontal to dock U-shaped well, it is characterised in that：Protect
The height of warm water mud layer is earth's surface to underground 1000m；The height of heat conduction cement layer is 1000 ~ 3000m of underground.
5. the large span according to claim 4 for deep geothermal heat exploitation is horizontal to dock U-shaped well, it is characterised in that：Institute
It is 1.89g/cm3 that heat conduction cement layer, which is stated, by density, and cement mortar of the API dehydrations less than 100ml is made.
6. the large span according to claim 1 for deep geothermal heat exploitation is horizontal to dock U-shaped well, it is characterised in that：Institute
State sleeve pipe and be more than 100W/'s (m.k) and corrosion resistant steel pipe for thermal conductivity factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720087527.1U CN207194865U (en) | 2017-01-23 | 2017-01-23 | A kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720087527.1U CN207194865U (en) | 2017-01-23 | 2017-01-23 | A kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well |
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| Publication Number | Publication Date |
|---|---|
| CN207194865U true CN207194865U (en) | 2018-04-06 |
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ID=61792393
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720087527.1U Expired - Fee Related CN207194865U (en) | 2017-01-23 | 2017-01-23 | A kind of large span for deep geothermal heat exploitation is horizontal to dock U-shaped well |
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|---|---|
| CN (1) | CN207194865U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318662A (en) * | 2019-07-10 | 2019-10-11 | 台州长天能源技术有限公司 | Gravity head beats U-shaped well method device product |
| CN112112601A (en) * | 2020-09-18 | 2020-12-22 | 西安交通大学 | Closed system for underground in-situ pyrolysis of coal and construction method thereof |
-
2017
- 2017-01-23 CN CN201720087527.1U patent/CN207194865U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318662A (en) * | 2019-07-10 | 2019-10-11 | 台州长天能源技术有限公司 | Gravity head beats U-shaped well method device product |
| CN110318662B (en) * | 2019-07-10 | 2023-12-19 | 台州长天能源技术有限公司 | Gravity head U-shaped well drilling method and equipment product |
| CN112112601A (en) * | 2020-09-18 | 2020-12-22 | 西安交通大学 | Closed system for underground in-situ pyrolysis of coal and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180406 Termination date: 20210123 |