CN203010992U - Under-pit device used for extraction of geothermal energy resources - Google Patents
Under-pit device used for extraction of geothermal energy resources Download PDFInfo
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- CN203010992U CN203010992U CN 201320029282 CN201320029282U CN203010992U CN 203010992 U CN203010992 U CN 203010992U CN 201320029282 CN201320029282 CN 201320029282 CN 201320029282 U CN201320029282 U CN 201320029282U CN 203010992 U CN203010992 U CN 203010992U
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- pipe
- water pipe
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- extraction water
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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 provides an under-pit device used for extraction of geothermal energy and mainly aims at providing a special mating device for a geothermal energy extraction method which can absorb seismic wave energy. The under-pit device is characterized in that a water injection pipe joint and an extraction water pipe joint which are provided with female threads are respectively arranged at the head end of a water injection pipe and an extraction water pipe, and male thread which are correspondingly matched with the injection pipe joint and the extraction water pipe joint are respectively formed at the tail end of the water injection pipe and the tail end of the extraction water pipe. The inner diameter of the water injection pipe is the same with that of the extraction water pipe, and the water injection pipe and the extraction water pipe are fixed on a base of a U-shaped pipe side by side after penetrating through a centering guide. Bottom end communicating holes which are provided with connecting female threads are formed in the base of the U-shaped pipe, and mutually communicated by a U-shaped duct. The connecting female threads of the base of the U-shaped pipe are matched with the male threads of the tail end of the water injection pipe and the tail end of the extraction water pipe. The water injection pipe and the extraction water pipe are steel pipe fittings which are provided with antiseptic layers on outer walls, and the extraction water pipe is provided with a thermal insulation layer. The under-pit has the advantages of being simple in structure, easy to machine, and strong in extruding resisting capacity, and improving a seismic wave absorption effect of a geothermal pit.
Description
Technical field
The utility model relates to a kind of downhole hardware that is applied in the geothermal energy resources extraction.
Background technology
Along with the development of modern industry, increasing to the demand of the energy, the contradiction of energy availability and demand problem is more and more outstanding.The main flow energy that uses in the world at present is all non-renewable energy resources, and alternative energy source such as geothermal energy, solar energy, wind energy, tide energy etc. have obtained greatly developing in recent years.Underground heat is one of the most competitive new forms of energy, and China is the abundant countries of geothermal energy resources, and geothermal energy resources account for 7.9% of the whole world, and very large development potentiality is arranged.But at present, there are 3 great technical barriers to hinder the development of geothermal power generation, i.e. the recharging of geothermal field, corrosion and scale problems.How to address these problems, improve the utilization rate of geothermal energy resources, be the bottleneck problem of this field development of restriction always.Earthquake is to cause casualties in the world and one of natural calamity of property loss maximum, and China is also one of earthquake disaster country of taking place frequently in the world.But the way of tackling at present earthquake disaster only limits to the measures such as earthquake prediction, escape popularization of knowledge and reinforcing building.Therefore, people can alleviate the destructiveness of burst earthquake in the urgent need to a kind of effective method, protection people's the security of the lives and property.
Summary of the invention
In order to solve the technical problem of mentioning in background technology, the utility model provides a kind of downhole hardware for the geothermal energy resources extraction, this kind apparatus structure is simple, be easy to processing, and have that anti-extrusion ability is strong and the low reactance-resistance ratio material space large, the effective characteristics of absorption seismic wave energy, can solve simultaneously the two aspect problems that exist in background technology after supporting the use with a kind of underground heat extraction method that can absorb seismic wave energy, have great practical value.
The technical solution of the utility model is: this kind is used for the downhole hardware of geothermal energy resources extraction, comprise some injection water pipe and extraction water pipe and the centralizers that connect successively, its unique distinction is: the head end of described injection water pipe and extraction water pipe is respectively injected water pipe joint and the recovered water pipe joint that has box thread, and the tail end of described injection water pipe and extraction water pipe has the male thread that the pipe joint corresponding with it matches; Described injection water pipe is identical with the internal diameter of extraction water pipe, and two pipes pass after the jack of described centralizer fixing side by side; Described downhole hardware also comprises a U-shaped pipe base, has two on described U-shaped pipe base with the bottom intercommunicating pore that connects box thread, communicates with each other by a U-shaped duct between described two bottom intercommunicating pores; Box thread on the intercommunicating pore of described bottom matches with the male thread of described injection water pipe and extraction water pipe tail end; Described injection water pipe and extraction water pipe are outer wall with the steel pipe fittings of anticorrosive coat, and the recovered water pipe has heat-insulation layer.
The utlity model has following beneficial effect: on the one hand, use this device and can realize a kind of underground heat extraction method that can absorb seismic wave energy.In the method, with surface water by inject water pipe inject be arranged in well by the circulating line that injects water pipe and consist of after the extraction water pipe is connected, by gathering underground heat at underground circulating-heating.Because the earth is equivalent to an infinitely-great constant temperature thermal source, the heat of injected water extraction can not cause the variations in temperature of large geothermal source.This mode does not need directly to exploit GEOTHERMAL WATER, so can not cause surface subsidence, need not recharge; There is not the problem of Groundwater face environmental pollution yet; Extent of corrosion to transfer line is also much smaller, has solved thus present geothermal energy and has utilized the technical problem that exists in the field.Adopt common steel tube owing to injecting water pipe, the extraction water pipe adopts insulating steel tube, can reduce energy loss.Insulating steel tube adopts the mode that vacuumizes in the middle of bimetallic tube, compared with the mode of wound insulation layer or adiabatic coating, and better heat preservation, longer service life.On the other hand, when using this device, need to beat geothermal deep well and make the Q value of well cementing material much smaller than the Q value on stratum by special cementing method, thereby can absorb seismic wave energy, make the energy loss of seismic wave large, propagating into the destruction of causing behind ground will be reduced.Inject the mode that internal diameter is identical and employing is arranged side by side of water pipe and extraction water pipe in this device; not only simple in structure; be easy to processing; and have that anti-extrusion ability is strong and the low reactance-resistance ratio material space large, the effective characteristics of absorption seismic wave energy; can effectively reduce the destruction that earthquake causes, the protection people life property safety.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the cross-sectional view of extraction water pipe described in the utility model.
Fig. 3 is the structural representation of U-shaped pipe base described in the utility model.
Fig. 4 is the plan structure schematic diagram of U-shaped pipe base described in the utility model.
Fig. 5 is the structural representation of centralizer described in the utility model.
Fig. 6 is the plan structure schematic diagram of centralizer described in the utility model.
1-recovered water pipe joint in figure, 2-extraction water pipe, 3-centralizer, 4-U shape pipe base, 5-injected water pipe joint, 6-injects water pipe, the 7-jack, and 8-connects box thread, 9-U shape duct, 10-bottom intercommunicating pore, 11-outer wall steel pipe, 12-vacuum heat-preserving chamber, 13-inwall steel pipe.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
Extremely shown in Figure 6 by Fig. 1, this kind is used for the downhole hardware of geothermal energy resources extraction, comprise some injection water pipe 6 and extraction water pipe 2 and the centralizers 3 that connect successively, the head end of described injection water pipe 6 and extraction water pipe 2 is respectively injected water pipe joint 5 and the recovered water pipe joint 1 that has box thread.The tail end of described injection water pipe 6 and extraction water pipe 2 has the male thread that the pipe joint corresponding with it matches; Described injection water pipe 6 is identical with the internal diameter of extraction water pipe 2, and two pipes pass after the jack 7 of described centralizer 3 fixing side by side; Described downhole hardware also comprises a U-shaped pipe base 4, has two on described U-shaped pipe base 4 with the bottom intercommunicating pore 10 that connects box thread 8, communicates with each other by a U-shaped duct 9 between described two bottom intercommunicating pores 10; Described connection box thread 8 matches with the male thread of described injection water pipe 6 and extraction water pipe 2 tail ends; Described injection water pipe 6 and extraction water pipe 2 are outer wall with the steel pipe fittings of anticorrosive coat, and extraction water pipe 2 has heat-insulation layer.
Described outer wall steel pipe 11 can adopt N80 level steel pipe, 6 millimeters of thicknesss of pipe wall; Inwall steel pipe 13 can adopt the N80 level steel pipe of inwall polishing, 4 millimeters of thicknesss of pipe wall; Outer wall steel pipe 11 and inwall steel pipe 13 spacings in described vacuum heat-preserving chamber 12 are 6 millimeters.
During use, after injecting water pipe and extraction water pipe and connecting, insert side by side in well, the bottom is connected by the U-shaped base, as shown in Figure 1.Inject between water pipe and extraction water pipe and add centralizer, centralizer employing hard rubber material.Prove by experiment, adopt injection water pipe and recovered water tube side-by-side can bring following three aspects: benefit in this device: the one, small size steel pipe difficulty of processing is little, the saving steel, and outer diameter of steel pipes is less, and anti-extrusion performance is just better; The 2nd, because water injects from ground, due to the hysteresis of temperature transmission, if adopt the annular space water filling, will be lower than formation temperature with the water temperature in annular space under the degree of depth, it is unfavorable that the extraction pipe is incubated; The 3rd, under the bore diameter condition identical with extraction water pipe diameter, when employing and comb, geothermal well absorbs the effective of seismic wave.
Claims (3)
1. downhole hardware that is used for the geothermal energy resources extraction, comprise some injection water pipe (6) and extraction water pipe (2) and the centralizers (3) that connect successively, it is characterized in that: the head end of described injection water pipe (6) and extraction water pipe (2) is respectively injected water pipe joint (5) and the recovered water pipe joint (1) that has box thread, and the tail end of described injection water pipe (6) and extraction water pipe (2) has the male thread that the pipe joint corresponding with it matches; Described injection water pipe (6) is identical with the internal diameter of extraction water pipe (2), and two pipes pass after the jack (7) of described centralizer (3) fixing side by side; Described downhole hardware also comprises a U-shaped pipe base (4), have two on described U-shaped pipe base (4) with the bottom intercommunicating pore (10) that connects box thread (8), communicate with each other by a U-shaped duct (9) between described two bottom intercommunicating pores (10); Described connection box thread (8) matches with the male thread of described injection water pipe (6) and extraction water pipe (2) tail end; Described injection water pipe (6) and extraction water pipe (2) are outer wall with the steel pipe fittings of anticorrosive coat, and extraction water pipe (2) has heat-insulation layer.
2. a kind of downhole hardware for the geothermal energy resources extraction according to claim 1 is characterized in that: described extraction water pipe (2) adopts the structure of double-layer pipe, is vacuum heat-preserving chamber (12) between outer wall steel pipe (11) and inwall steel pipe (13).
3. a kind of downhole hardware for the geothermal energy resources extraction according to claim 2, is characterized in that: described outer wall steel pipe (11) employing N80 level steel pipe, 6 millimeters of thicknesss of pipe wall; Inwall steel pipe (13) adopts the N80 level steel pipe of inwall polishing, 4 millimeters of thicknesss of pipe wall; Described outer wall steel pipe (11) is 6 millimeters with inwall steel pipe (13) spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029282 CN203010992U (en) | 2013-01-21 | 2013-01-21 | Under-pit device used for extraction of geothermal energy resources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029282 CN203010992U (en) | 2013-01-21 | 2013-01-21 | Under-pit device used for extraction of geothermal energy resources |
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| Publication Number | Publication Date |
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| CN203010992U true CN203010992U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320029282 Expired - Lifetime CN203010992U (en) | 2013-01-21 | 2013-01-21 | Under-pit device used for extraction of geothermal energy resources |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294118A (en) * | 2021-05-26 | 2021-08-24 | 中石化绿源地热能(陕西)开发有限公司 | Special compensation type packing system for same-well mining and irrigation and construction method |
| CN113340010A (en) * | 2021-06-08 | 2021-09-03 | 合肥工业大学 | Vacuum and pressure composite type groundwater source heat pump recharging device |
-
2013
- 2013-01-21 CN CN 201320029282 patent/CN203010992U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294118A (en) * | 2021-05-26 | 2021-08-24 | 中石化绿源地热能(陕西)开发有限公司 | Special compensation type packing system for same-well mining and irrigation and construction method |
| CN113340010A (en) * | 2021-06-08 | 2021-09-03 | 合肥工业大学 | Vacuum and pressure composite type groundwater source heat pump recharging device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |