CN106194124A - Geothermal well based on bedrock geology - Google Patents
Geothermal well based on bedrock geology Download PDFInfo
- Publication number
- CN106194124A CN106194124A CN201610773120.4A CN201610773120A CN106194124A CN 106194124 A CN106194124 A CN 106194124A CN 201610773120 A CN201610773120 A CN 201610773120A CN 106194124 A CN106194124 A CN 106194124A
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- well
- filter
- base pipe
- water
- pipe
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Classifications
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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
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/003—Insulating arrangements
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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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
Abstract
The invention provides a kind of geothermal well based on Bedrock Geology, including the well cementation section arranged from top to bottom and filter well section, described well cementation section includes 9 meters of long wall casings, uses cement mortar to recharge between described wall casing and well bore；Described filter well section includes 11 meters of long water-permeable pipes, is provided with filter, and fills cobblestone between water-permeable pipe and well bore between described water-permeable pipe and well bore；Being provided with the producing well section of 40 meters long bottom described filter well section, the diameter of this producing well section is less than described well cementation section and the diameter of filter well section.In the present invention, subsoil water in boulder bed and bedrock fracture layer can be incorporated in geothermal well by geothermal well simultaneously, make having abundant water resources in geothermal well, sound assurance is provided for the follow-up utilization to underground heat, and the silt of subsoil water in boulder bed can be intercepted between water-permeable pipe and well bore by filter, prevent silt from entering in geothermal well, improve the quality at water source in geothermal well.
Description
Technical field
The present invention relates to geothermal well technical field, be specifically related to a kind of geothermal well based on Bedrock Geology.
Background technology
Underground heat is a kind of energy resource produced from earth interior nuclear fusion, and geothermal energy is a kind of clean energy resource and can be again
The raw energy, is widely used in terms of heating and refrigerating, and its DEVELOPMENT PROSPECT is the most wide.
Building geothermal well is the committed step utilizing geothermal energy resources, and for different geology, the casing programme of geothermal well is also
It is not quite similar.For Bedrock Geology, the bedrock fracture layer abundant including water content and the compact structure being positioned above
Horizon d, and above horizon d, typically can there are certain thickness unconsolidated formation, mainly include farinose argillic horizon, boulder bed
With argillaceous siltstoue etc..Wherein, mainly there are boulder bed and bedrock fracture layer in water-bearing layer, and wherein the subsoil water impurity in boulder bed is relatively
Many, the sediment charge of the subsoil water of bedrock fracture layer is the most less, existing geothermal well based on Bedrock Geology typically only with
The subsoil water of bedrock fracture layer, decreases filtration step, but also result in the waste of the energy simultaneously, and for bedrock fracture layer
The situation of the geology of moisture content less, the situation also resulting in insufficient water sources in geothermal well occurs.
And if water and the Bedrock Crevice Water of boulder bed are incorporated in geothermal well simultaneously, it is necessary to the ground to boulder bed
Lower water carries out filtration treatment, and filter opening, in order to make subsoil water water outlet smooth, is typically arranged bigger than normal by the filter of existing geothermal well,
Which results in part path silt and can enter in geothermal well smoothly, when the water extraction containing silt is utilized by immersible pump, hold
Easily causing the damage of equipment, the system that affects is run, and causes heavy losses；And, increase along with silt enters the quantity in geothermal well
Many, also result in hoistway and silt up, affect the normal use of geothermal well.
Summary of the invention
For defect of the prior art, the present invention provides a kind of geothermal well based on Bedrock Geology, to ensure geothermal well
Inside have abundant water resources, and improve the quality at water source in geothermal well, the most retentively temperature at water source in hot well.
A kind of based on Bedrock Geology the geothermal well that the present invention provides, including the well cementation section arranged from top to bottom and filter
Well section, described well cementation section includes 9 meters of long wall casings, uses cement mortar to recharge between described wall casing and well bore；Described filtration
Device well section includes 11 meters of long water-permeable pipes, is provided with filter between described water-permeable pipe and well bore, and between water-permeable pipe and well bore
Fill cobblestone；Being provided with the producing well section of 40 meters long bottom described filter well section, the diameter of this producing well section is less than institute
State well cementation section and the diameter of filter well section.
In the present invention, geothermal well is followed successively by well cementation section, filter well section and producing well section from top to bottom, and geothermal well is built
The geologic structure of position be divided into from top to bottom the farinose argillic horizon of 7 meters, the boulder bed of 13 meters, the argillaceous siltstoue layer of 4 meters,
The horizon d of 5 meters and the bedrock fracture layer of 31 meters, loosely organized due to farinose argillic horizon, and also water content is few, therefore to
Ensure the stability of casing programme, and prevent cold water from entering in geothermal well, the well cementation section degree of depth is set to 9 meters, and uses 9 meters
Long wall casing and the mode of recharge water mud are reinforced；Owing to the water content of boulder bed is enriched, therefore arrange at boulder bed
The degree of depth is the filter well section of 11 meters, uses 11 meters of long water-permeable pipes to reinforce, the filter arranged between water-permeable pipe and well bore
Silt in subsoil water can be intercepted between water-permeable pipe and well bore, prevent silt from entering in geothermal well, improve geothermal well
The quality at middle water source, and between water-permeable pipe and well bore, fill cobblestone, to be further ensured that the stability of filter well section, with
Time the main component of geology residing for implant and filter well section identical, do not interfere with the circulation of subsoil water；Due to basement rock
The water content of crack layer is enriched, and therefore arranges the producing well section of 40 meters long bottom filter well section, with by bedrock fracture layer
Subsoil water be incorporated in geothermal well, owing to the structure of argillaceous siltstoue layer, horizon d and bedrock fracture layer three is the most steady
Fixed, and sediment charge is few, and therefore producing well section is designed as open hole, and the cost that can reduce construction can also shorten underground heat simultaneously
The construction period of well, improves efficiency of construction.Visible, that the present invention provides geothermal well based on Bedrock Geology, can be simultaneously by ovum
Subsoil water in rock layers and bedrock fracture layer is incorporated in geothermal well, can make having abundant water resources, for follow-up underground heat in geothermal well
Utilization provide sound assurance.
Preferably, described wall casing includes outer wall casing and interior wall casing, and described interior wall casing passes through fixed support and institute
State outer wall casing to connect, between described outer wall casing and interior wall casing, be provided with heat-insulation layer.Owing to well cementation section is in the upper of well bore
Side, the temperature on this stratum is relatively low, and the water source in geothermal well touches wall casing and heat will be caused to scatter and disappear, therefore, in well cementation section
Place arranges heat-insulation layer can effectively prevent the loss of water source heat in geothermal well.
Preferably, described heat-insulation layer is polyurethane foaming layer.Utilize shape between foaming technique wall casing outside and interior wall casing
The polyurethane insulation coating become has good heat insulation effect, it is possible to meet the demand that is incubated for a long time, and polyurethane material has
There is good wearability, resistance to ag(e)ing and cohesive, go for the use environment of geothermal well.
Preferably, the inner surface of described outer wall casing is provided with infrared-reflecting coated.Outer wall casing inner surface is arranged
The infrared ray of polyurethane insulation coating can be reflected by infrared reflection coating, reduces the diffusion of polyurethane insulation coating heat, carries
High heat insulation effect.
Preferably, the outer surface of described interior wall casing is provided with solar energy heat absorbing coating.Owing to interior wall casing directly contacts
Water source in geothermal well, causes its outer surface to have higher temperature, and solar energy heat absorbing coating can preferably absorb infrared ray, from
And at outer surface one heat build-up layer of formation of interior wall casing, the heat of wall casing overflows in reducing, further increase insulation and imitate
Really.
Preferably, described interior wall casing and outer wall casing are stainless steel.Use the interior wall casing of stainless steel
Intensity with outer wall casing can improve casing programme, prevents well bore from caving in, and stainless steel has the most corrosion-resistant
Property, go for water source environment complicated in geothermal well, the prolongedly service life of hot well.
Preferably, the inner surface of described interior wall casing is provided with corrosion-inhibiting coating.Owing to the environment of underground the most all compares evil
Bad, the corrosivity at the water source in geothermal well is relatively strong, and the inner surface at interior wall casing arranges corrosion-inhibiting coating, can protect it
Protect, extend its service life.
Preferably, described filter includes first level filtering device and two-stage filter, and described two-stage filter is arranged
In described first level filtering device；Described first level filtering device includes base pipe, protection block reinforcement and bag net, and described base pipe is circle
Pipe, described base pipe tube wall has been evenly arranged permeable hole, and described protection block reinforcement is vertically welded on base pipe outer wall, protection gear
Muscle is equally spaced, and described bag net is wrapped on protection block reinforcement and base pipe outer wall, and the scope of the vertical parcel of bag net is more than protection
The scope of block reinforcement, bag net external iron wire is fastened in protection block reinforcement and base pipe outer wall；Described two-stage filter includes
Inner tube, outer tube, dividing plate and filter element, said inner tube and outer tube are pipe, and inner and outer tubes are coaxially disposed, on outer tube wall uniformly
Being disposed with permeable hole, outer tube top is provided with suspension ring, and described dividing plate one end is fixing with outer wall of inner tube to be connected, and the dividing plate other end is with outer
Inside pipe wall is fixing to be connected, and dividing plate will be divided into multiple chamber between inner tube and outer tube, described filter element is filled in the cavity, chamber
Room upper and lower side is uncovered, for discharging the water after filter element filtering；Described outer tube top is provided with outside annular outwardly
Pipe excrescence, described base pipe is provided with on the base pipe of the annular protruded inwardly from excrescence under excrescence and base pipe, described
Outer tube is passed down through excrescence inner circle on described base pipe, and outer tube excrescence is pressed on base pipe on excrescence, outer pipe bottom pressure
Under described base pipe on excrescence, described base pipe is lined with between excrescence and outer tube excrescence rubber cushion, described base pipe
Lower between excrescence and outer pipe bottom, it is lined with rubber cushion.
Filter in the present invention includes first level filtering device and two-stage filter.Wherein first level filtering device is to silt
Carrying out coarse filtration, be mainly used in filtering out oarse-grained sand, base pipe tube wall has been evenly arranged permeable hole, bag net is wrapped in pipe
Outward, in subsoil water geothermal well to be entered, first have to the permeable hole two-layer through bag net and base pipe and filter, filter out oarse-grained
Sand.Two-stage filter carries out fine straining to silt, is mainly used in filtering out tiny silt, in two-stage filter includes
Pipe, outer tube, dividing plate and filter element, inner tube is coaxially arranged with outside, and dividing plate is the connecting framework of inner tube and outer tube, simultaneously by inner tube with
Space between outer tube is divided into multiple cavity, filling filter element in cavity, by such design, makes the whole two-stage filter be
One entirety, sound construction；Two-stage filter is mainly by the filter element two-layer in the permeable hole being located on outer tube wall and chamber
Filtering, inner pipe wall is not provided with permeable hole, and chamber upper and lower end is uncovered, after subsoil water enters chamber, along the upper and lower flowing of chamber,
Discharge from chamber upper and lower end, by such design, extend subsoil water flow path in filter element, improve filtration effect
Really.First level filtering device filter opening is relatively big, is not easily blocked, can filter out bulky grain sand, and two-stage filter filter opening is little, easily blocks up
Plug, can filter out tiny silt, use the mode of this classified filtering, can more thoroughly filter out sand, can reduce again
The probability of filter blocking.Outer tube is passed down through excrescence inner circle on base pipe, and outer tube excrescence is pressed on base pipe on excrescence,
Outer pipe bottom is pressed under base pipe on excrescence, makes two-stage filter and first level filtering device combine, and they
Between be all lined with rubber cushion, be compacted rubber cushion by the deadweight of two-stage filter, good sealing effect, silt will not flow out from gap.
Two-stage filter is integral design, can separate with excrescence under excrescence on base pipe and base pipe easily, can be by setting
Put the suspension ring on outer tube top two-stage filter entirety is hung out geothermal well to be carried out, keep in repair or change, clean, keep in repair or
Again two-stage filter is hung in geothermal well after replacing, be used in combination with first level filtering device, thus can extend
In the service life of filter, further increase the quality at water source in geothermal well.
Preferably, described filter element is rustless steel filter element, and the outer wall of said inner tube and dividing plate are provided with consolidating outwardly
Locking member, described fixture is used for fixing described rustless steel filter element；The cross-sectional area of described each chamber is equal.Rustless steel filter element has
Having good strainability, the subsoil water after filtration can meet system and use requirement, its corrosion resistance, thermostability, resistance to pressure, wear-resisting
Property good, severe underground environment can be met, its core pore filtering accuracy uniform, accurate, the flow of unit are is big, can improve
The efficiency of fine straining, improves filter efficiency, and it can re-use after cleaning, free of replacement, economizes on resources, and reduces cost；Through coarse filtration
After subsoil water after the permeable hole of outer tube enters chamber, along the upper and lower flowing of chamber, through the uncovered discharge of chamber, filter element is easily sent out
Raw displacement, conglomeration, rustless steel filter element is played fixation by fixture, and during filtration, the flowing of water will not make filter element be subjected to displacement, filter
Core will not conglomeration, thus ensure that the normal work of filter element, improve filter effect；And the cross-sectional area of each chamber is equal, enters
The water yield going out chamber is uniform, can promote effect and the efficiency of filtration further.
Preferably, the permeable hole of described base pipe is bar hole, and the bar hole of described upper and lower adjacent two rows mutually staggers.
Using bar hole, can meet coarse filtration requirement, upper and lower adjacent two rows mutually stagger, and make permeable hole be more evenly distributed, and filter and enter base
The subsoil water of plinth pipe the most evenly, can promote effect and the efficiency of filtration further.
Preferably, in order to optimize structure, described protection block reinforcement uses antirust round steel, and a diameter of 4mm of described round steel, between round steel
Away from for 20mm.
Preferably, described bag net is nylon yarn bag net.Nylon yarn bag net can filter out oarse-grained sand, reaches coarse filtration
Requirement.
Preferably, described iron wire uses galvanized wire, and it is 10mm that iron wire is wound around spacing.Use galvanized wire, prevent from being wound around
Iron wire rupture because being corroded, cause bag net to come off, simultaneously in order to optimize structure, it is 10mm that iron wire is wound around spacing.
Preferably, the permeable hole of described outer tube is circular port, and left and right two row of described circular port mutually stagger.Use circle
Hole, can meet the requirement of fine straining, and left and right adjacent two row mutually stagger, and make permeable hole be more evenly distributed, enter the subsoil water of chamber
The most evenly, the effect filtered and efficiency are promoted.
Preferably, the discharge area of the permeable hole of described base pipe is more than the discharge area of the permeable hole of described outer tube.Base
The discharge area of the permeable hole of plinth pipe more than the discharge area of permeable hole of outer tube, can guarantee that coarse filtration provides enough water for fine straining
Amount, promotes filter efficiency.
Preferably, described base pipe surfaces externally and internally, the surfaces externally and internally of inner tube, the surfaces externally and internally of outer tube and the surface of permeable hole
All scribble corrosion-resistant coating.The environment of underground the most all compares badly, and corrosivity is relatively strong, in base pipe surfaces externally and internally, inner tube
Outer surface, the surfaces externally and internally of outer tube are coated with one layer of anticorrosion with these parts directly contacted with subsoil water or soil of surface of permeable hole
Erosion layer, can reduce the corrosion of filter component, increase the service life.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described.In all of the figs, similar element
Or part is typically by the reference mark being similar to.In accompanying drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural representation of geothermal well based on Bedrock Geology of the present invention；
Fig. 2 is the structural representation of the wall casing of geothermal well based on Bedrock Geology of the present invention；
Fig. 3 is the sectional structure schematic diagram of the filter of geothermal well based on Bedrock Geology of the present invention；
Fig. 4 is the A-A sectional view of Fig. 3；
Fig. 5 is the B-B sectional view of Fig. 3；
Fig. 6 is the C-C sectional view of Fig. 3；
Fig. 7 is that the base pipe of the filter of geothermal well based on Bedrock Geology of the present invention is combined with two-stage filter
Structural representation；
Fig. 8 is the structural representation of the two-stage filter of the filter of geothermal well based on Bedrock Geology of the present invention
Figure.
Reference:
1-wall casing；2-water-permeable pipe；3-filter；
The outer wall casing of 11-；Wall casing in 12-；13-fixed support；14-polyurethane insulation coating；15-infrared reflection is coated with
Layer；16-solar energy heat absorbing coating；31-base pipe；32-protects block reinforcement；33-bag net；34-iron wire；35-outer tube；36-inner tube；
37-chamber；38-dividing plate；39-permeable hole；
Excrescence on 311-base pipe；Excrescence under 312-base pipe；351-outer tube excrescence；352-suspension ring；361-is solid
Locking member.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of technical solution of the present invention is described in detail.Following example are only used for
Technical scheme is clearly described, is therefore only used as example, and the protection model of the present invention can not be limited with this
Enclose.
As it is shown in figure 1, the main component of the geologic structure that position built by geothermal well is followed successively by 7 from top to bottom in the present embodiment
Farinose argillic horizon, the boulder bed of 13 meters, the argillaceous siltstoue layer of 4 meters, the horizon d of 5 meters and the bedrock fracture layer of 31 meters of rice,
Wherein, farinose argillic horizon loosely organized, water content is few, and the structure of boulder bed is the loosest, but aqueous abundant, argillaceous siltstoue
Structure relative close, stability is preferable, relative water proof, horizon d and the compact structure of bedrock fracture layer, good stability, basement rock
Crack layer contains abundant subsoil water, and the subsoil water sediment charge of this layer is few；Therefore, in order to ensure stablizing of casing programme
Property, the geothermal well based on Bedrock Geology that the embodiment of the present invention provides, it is followed successively by well cementation section, filter well section and life from top to bottom
Producing well section, wherein well cementation section is 9 meters, correspondingly uses the wall casing 1 of 9 meters long to reinforce, and uses water between wall casing 1 and well bore
Mud recharges, to improve the stability of geothermal well；Filter well section is 11 meters, correspondingly uses the water-permeable pipe 2 of 11 meters long to reinforce,
Between water-permeable pipe 2 and well bore, it is provided with filter 3, and between water-permeable pipe 2 and well bore, fills cobblestone, consolidate well bore further
The stability of structure, the subsoil water in boulder bed is flowed in geothermal well via in the filter 3 hole from water-permeable pipe 2, filters
After quality of groundwater be improved, in water, the content of silt is greatly decreased, and can meet follow-up to the water source in geothermal well
Utilize demand；Producing well section is 40 meters, to be incorporated in geothermal well by the subsoil water in bedrock fracture layer, due to argillaceous siltstoue
The structure of layer, horizon d and bedrock fracture layer three is the most relatively stable, and sediment charge is few, and therefore producing well section is designed as naked
Well, the cost that can reduce construction can also shorten the construction period of geothermal well simultaneously, improve efficiency of construction.Visible, this enforcement
The geothermal well based on Bedrock Geology that example provides, can be incorporated into underground heat by the subsoil water in boulder bed and bedrock fracture layer simultaneously
In well, can make having abundant water resources in geothermal well, the utilization for follow-up underground heat provides sound assurance.
As in figure 2 it is shown, described wall casing 1 includes outer wall casing 11 and interior wall casing 12, this interior wall casing 12 is by fixing
Support 13 is connected with outer wall casing 11, is provided with the polyurethane heat-insulation that foaming is formed outside between wall casing 11 and interior wall casing 12
Layer 14, owing to well cementation section is in the top of well bore, the temperature on this stratum is relatively low, and the water source in geothermal well touches interior wall casing 12
Heat will be caused to scatter and disappear, therefore, heat-insulation layer is set at well cementation section and can effectively prevent the loss of water source heat in geothermal well；Institute
The inner surface stating outer wall casing 11 is provided with infrared-reflecting coated 15, and this infrared-reflecting coated 15 is with thermoset resin material
For film formation at low temp material, with low melting point and low-expansion coefficient special crown glass binding agent as high temperature bonding material, through special work
Skill processing preparation a kind of that have infrared external reflection function, high temperature resistant, caking property is strong and the organo-mineral complexing of nontoxic pollution-free
Coating, can reflect the infrared ray of polyurethane insulation coating 14, reduces the diffusion of polyurethane insulation coating 14 heat, improves and protects
Temp effect；Due to the water source in interior wall casing 12 directly contact hot well, its outer surface is caused to have higher temperature, therefore in institute
The outer surface stating interior wall casing 12 is provided with solar energy heat absorbing coating 16, can preferably absorb infrared ray, thus at interior wall casing
The outer surface of 12 forms a heat build-up layer, and in reducing, the heat of wall casing 12 overflows, and further increases heat insulation effect, this sun
Can heat absorbing coating 16 be the anodized coating of steel, there is the feature of humidity, it is adaptable to the use environment in geothermal well.
Above-mentioned outer wall casing 11 and interior wall casing 12 are stainless steel, can improve the intensity of casing programme, prevent
Well bore caves in, and stainless steel has preferable corrosion resistance, goes for water source environment complicated in geothermal well, prolongs
The service life of long geothermal well
Additionally, due to the environment of underground the most all compares badly, the corrosivity at the water source in geothermal well is relatively strong, therefore upper
The inner surface stating interior wall casing 12 is provided with corrosion-inhibiting coating, to protect it further, extends its service life.This enforcement
The corrosion-inhibiting coating that example uses, with polyurethane modified epoxy resin as substrate, is main color stuffing with mica iron oxide red, and it is not to
There is stronger adhesive force on rust steel surface, can work and not fall off for a long time in the environment of geothermal well humidity.
As shown in fig. 3 to 7, described filter includes first level filtering device and two-stage filter, and two-stage filter is arranged
In first level filtering device；First level filtering device includes the base pipe 31 of circle, protection block reinforcement 32 and bag net 33, and base pipe 31 is managed
Being evenly arranged permeable hole 39 on wall, permeable hole 39 is bar hole, and upper and lower adjacent two rows mutually stagger, and protection block reinforcement 32 uses
The antirust round steel of a diameter of 4mm, is vertically welded on base pipe 31 outer wall, and its spacing is 20mm, and bag net 33 is nylon yarn bag net
33, it is wrapped on protection block reinforcement 32 and base pipe 31 outer wall, the scope that bag net 33 vertically wraps up is more than the scope of protection block reinforcement 32,
Bag net 33 external galvanized wire 34 is fastened in protection block reinforcement 32 and base pipe 31 outer wall with 10mm spacing；Cascade filtration fills
Put and include that inner tube 36, outer tube 35, dividing plate 38 and filter element, inner tube 36 and outer tube 35 are pipe, inner tube 36 and outer tube 35 and coaxially set
Putting, outer tube 35 tube wall has been evenly arranged permeable hole 39, permeable hole 39 is circular port, and left and right two row mutually stagger, base pipe
The discharge area of permeable hole 39 is more than the discharge area of the permeable hole 39 of outer tube, and outer tube 35 top is provided with four suspension ring 352, every
Plate 38 one end is fixing with inner tube 36 outer wall to be connected, and dividing plate 38 other end is fixing with outer tube 35 inwall to be connected, and dividing plate 38 is by inner tube 36
Be divided into the equal chamber of multiple cross-sectional area 37 between outer tube 35, filter element use rustless steel filter element, be filled in chamber 37,
Chamber 37 upper and lower side is uncovered, for discharging the water after filter element filtering, the outer wall of inner tube 36 and dividing plate 38 is provided with outwards
Prominent fixture 361, fixture 361 is used for fixing rustless steel filter element, base pipe 31 surfaces externally and internally, the interior appearance of inner tube 36
The surface of face, the surfaces externally and internally of outer tube 35 and permeable hole 39 all scribbles corrosion-resistant coating；Outer tube 35 top is provided with outwardly
Annular outer tube excrescence 351, base pipe 31 is provided with on the ring foundation pipe protruded inwardly from and highlights under excrescence 311 and base pipe
Body 312, outer tube 35 is passed down through excrescence 311 inner circle on base pipe, and outer tube excrescence 351 is pressed in excrescence 311 on base pipe
On, it is pressed under base pipe on excrescence 312 bottom outer tube 35, base pipe is lined with between excrescence 311 and outer tube excrescence 351
Rubber cushion, under base pipe bottom excrescence 312 and outer tube 35 between be lined with rubber cushion.
Wherein first level filtering device carries out coarse filtration to silt, is mainly used in filtering out oarse-grained sand；Base pipe 31 is managed
Being evenly arranged bar shaped permeable hole 39 on wall, upper and lower adjacent two rows mutually stagger, and make permeable hole 39 be more evenly distributed, filter into
Entering the subsoil water of base pipe 31 the most evenly, nylon yarn bag net 33, by protection block reinforcement 32 pad, is wrapped in outside pipe, uses galvanized iron
Silk 34 is fixed, and in subsoil water geothermal well to be entered, first has to the permeable hole 39 two-layer mistake through nylon yarn bag net 33 and base pipe
Filter, filters out oarse-grained sand.Two-stage filter carries out fine straining to silt, is mainly used in filtering out tiny silt, and two
Level defecator includes inner tube 36, outer tube 35, dividing plate 38 and filter element, and inner tube 36 is coaxially arranged with outer tube 35, and dividing plate 38 is inner tube
36 with the connecting framework of outer tube 35, the space between inner tube 36 with outer tube 35 is divided into the chamber that multiple cross-sectional area is equal simultaneously
37, filtered by such segmentation, each chamber 37 water yield is uniform, can promote the effect and efficiency filtered, fill not in chamber 37
Rust steel filter element, by such design, making whole two-stage filter is an entirety, sound construction；Meanwhile, rustless steel filter element
Having good strainability, the subsoil water after filtration can meet system and use requirement, its corrosion resistance, thermostability, resistance to pressure, resistance to
Mill property is good, can meet severe underground environment, its core pore filtering accuracy uniform, accurate, and the flow of unit are is big, can carry
The efficiency of high fine straining, meets system water demand, and it can re-use after cleaning, free of replacement, economizes on resources, and reduces cost；
Two-stage filter filters mainly by the filter element two-layer in the permeable hole 39 being located on outer tube 35 tube wall and chamber 37, permeable hole 39
Upper and lower adjacent two row mutually stagger, and make permeable hole 39 be more evenly distributed, enter the subsoil water of chamber 37 the most evenly；Base pipe
The discharge area of permeable hole 39 more than the discharge area of permeable hole 39 of outer tube, can guarantee that coarse filtration provides enough water for fine straining
Amount, promotes filter efficiency；Inner tube 36 is not provided with permeable hole 39, chamber 37 upper and lower end opening, after subsoil water enters chamber 37, to
Flowing in chamber 37 two ends, discharges from chamber 37 upper and lower end, by such design, extend subsoil water flowing in filter element
Path, improves filter effect, and owing to, in filter process, filter element is susceptible to displacement, conglomeration, rustless steel is filtered by fixture 361
Core plays fixation, and during filtration, the flowing of water will not make filter element be subjected to displacement, filter element will not conglomeration, thus ensure that filter element
Normal work, improves filter effect；The environment of underground the most all compares badly, and corrosivity is relatively strong, appearance in base pipe 31
The surface of face, the surfaces externally and internally of inner tube 36, the surfaces externally and internally of outer tube 35 and permeable hole 39 these directly connect with subsoil water or soil
The part touched is coated with one layer of corrosion-resistant coating, can reduce the corrosion of filter component, increase the service life.
First level filtering device filter opening is relatively big, is not easily blocked, can filter out bulky grain sand, and two-stage filter filter opening is little,
Easily blocking, can filter out tiny silt, use the mode of this classified filtering, can more thoroughly filter out sand, again can
Reduce the probability of plugged filter.
Outer tube 35 is passed down through excrescence 311 inner circle on base pipe, and outer tube excrescence 351 is pressed in excrescence on base pipe
On 311, be pressed under base pipe on excrescence 312 bottom outer tube 35, by this dismountable mode by two-stage filter and
First level filtering device combines, and in combination with being all lined with rubber cushion between position, is compacted by the deadweight of two-stage filter
Rubber cushion, good sealing effect, silt will not flow out from gap；Two-stage filter and first level filtering device detachably separate, permissible
Two-stage filter entirety is lifted cleaning, keeps in repair or change by the suspension ring 352 arranged by outer tube 35 top, cleans, keeps in repair
Or again two-stage filter is hung in geothermal well after changing, it is used in combination with first level filtering device, thus improves
The quality at water source in geothermal well.
Filter described in the present embodiment draw water with recharge in the method for operation different, specific as follows:
When drawing water, need first level filtering device and two-stage filter jointly to act on, secondary protection device is hung in underground heat
In well, outer tube 5 is passed down through excrescence 311 inner circle on base pipe, and outer tube excrescence 351 is pressed on base pipe on excrescence 311,
Fitting together with first level filtering device, the subsoil water containing silt flows through nylon yarn bag net 33, the bar shaped on base pipe 31
Permeable hole 39 enters in geothermal well, completes the one-level of silt in the outer filtration through nylon yarn bag net 33 and bar shaped permeable hole 39 of well
Filter；The subsoil water after coarse filtration circular permeable hole on outer tube 35 enters chamber 37, through the fine straining of rustless steel filter element, from
The upper and lower uncovered discharge of chamber 37, completes the cascade filtration of silt, thus is met the underground water source of Production requirement.
Recharge the water source being intended to after utilizing and go back to underground through underground heat well irrigation, in order to reduce the resistance recharged, need two grades
Defecator entirety hangs out outside well, and recharge water bar shaped permeable hole 39 on base pipe 31 flows out, and then passes through nylon yarn bag net
33 flow back into underground, contrary with the flow direction drawn water when filtering, and have the effect of cleaning to first level filtering device, prevent filter opening from blocking up
Plug, meanwhile, after two-stage filter hangs out, can be carried out it, keeps in repair or maintain.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in previous embodiment is modified, or the most some or all of technical characteristic is equal to
Replace；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the model of embodiment of the present invention technical scheme
Enclosing, it all should be contained in the middle of the claim of the present invention and the scope of description.
Claims (10)
1. a geothermal well based on Bedrock Geology, including the well cementation section arranged from top to bottom and filter well section, its feature exists
In:
Described well cementation section includes 9 meters of long wall casings, uses cement mortar to recharge between described wall casing and well bore；
Described filter well section includes 11 meters of long water-permeable pipes, is provided with filter between described water-permeable pipe and well bore, and permeable
Cobblestone is filled between pipe and well bore；
Being provided with the producing well section of 40 meters long bottom described filter well section, the diameter of this producing well section is less than described well cementation section
Diameter with filter well section.
Geothermal well based on Bedrock Geology the most according to claim 1, it is characterised in that:
Described wall casing includes outer wall casing and interior wall casing, and described interior wall casing is by fixed support with described outer wall casing even
Connect, between described outer wall casing and interior wall casing, be provided with heat-insulation layer.
Geothermal well based on Bedrock Geology the most according to claim 2, it is characterised in that:
Described heat-insulation layer is polyurethane foaming layer.
Geothermal well based on Bedrock Geology the most according to claim 2, it is characterised in that:
The inner surface of described outer wall casing is provided with infrared-reflecting coated.
Geothermal well based on Bedrock Geology the most according to claim 4, it is characterised in that:
The outer surface of described interior wall casing is provided with solar energy heat absorbing coating.
Geothermal well based on Bedrock Geology the most according to claim 2, it is characterised in that:
Described interior wall casing and outer wall casing are stainless steel.
Geothermal well based on Bedrock Geology the most according to claim 6, it is characterised in that:
The inner surface of described interior wall casing is provided with corrosion-inhibiting coating.
Geothermal well based on Bedrock Geology the most according to claim 1, it is characterised in that:
Described filter includes that first level filtering device and two-stage filter, described two-stage filter are arranged at described one-level mistake
In filter device；
Described first level filtering device includes base pipe, protection block reinforcement and bag net, and described base pipe is pipe, described base pipe tube wall
On be evenly arranged permeable hole, described protection block reinforcement is vertically welded on base pipe outer wall, protection block reinforcement be equally spaced, described
Bag net is wrapped on protection block reinforcement and base pipe outer wall, and the scope of the vertical parcel of bag net is more than the scope of protection block reinforcement, outside bag net
It is fastened in protection block reinforcement and base pipe outer wall with iron wire；
Described two-stage filter includes that inner tube, outer tube, dividing plate and filter element, said inner tube and outer tube are pipe, and inner tube is with outer
Pipe is coaxially disposed, and outer tube wall has been evenly arranged permeable hole, and outer tube top is provided with suspension ring, outside described dividing plate one end is with inner tube
Wall is fixing to be connected, and the dividing plate other end is fixing with outer tube wall to be connected, and dividing plate will be divided into multiple chamber, institute between inner tube and outer tube
Stating filter element to fill in the cavity, chamber upper and lower side is uncovered, for discharging the water after filter element filtering；Described outer tube top
Being provided with annular outer tube excrescence outwardly, described base pipe is provided with on the base pipe of the annular protruded inwardly from prominent
Excrescence under body and base pipe, described outer tube is passed down through excrescence inner circle on described base pipe, and outer tube excrescence is pressed in basis
On pipe on excrescence, outer pipe bottom is pressed under described base pipe on excrescence, excrescence and outer tube excrescence on described base pipe
Between be lined with rubber cushion, be lined with rubber cushion under described base pipe between excrescence and outer pipe bottom.
Geothermal well based on Bedrock Geology the most according to claim 8, it is characterised in that:
Described filter element is rustless steel filter element, and the outer wall of said inner tube and dividing plate are provided with fixture outwardly, described solid
Locking member is used for fixing described rustless steel filter element；The cross-sectional area of described each chamber is equal.
Geothermal well based on Bedrock Geology the most according to claim 8, it is characterised in that:
The permeable hole of described base pipe is bar hole, and the bar hole of described upper and lower adjacent two rows mutually staggers.
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| CN201610773120.4A CN106194124B (en) | 2016-08-30 | 2016-08-30 | Geothermal well based on Bedrock Geology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107477895A (en) * | 2017-09-29 | 2017-12-15 | 上海中金能源投资有限公司 | Mid-deep strata underground heat bore hole heat exchanger |
| CN107676996A (en) * | 2017-09-29 | 2018-02-09 | 上海中金能源投资有限公司 | Underground heat bore hole heat exchanger and geothermal well well shaft fixing technology |
| CN108868688A (en) * | 2017-05-08 | 2018-11-23 | 国际壳牌研究有限公司 | Handle method, equipment and the system of drilling well |
| CN112576199A (en) * | 2020-12-21 | 2021-03-30 | 太原理工大学 | Production casing for geothermal well bore and construction method thereof |
| CN112649251A (en) * | 2020-12-16 | 2021-04-13 | 苏州普滤得净化股份有限公司 | Layered targeted water taking method for underground water |
| CN112727404A (en) * | 2021-01-19 | 2021-04-30 | 湖北省地质局武汉水文地质工程地质大队 | Heat-preservation water taking structure of middle-deep geothermal well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112649251A (en) * | 2020-12-16 | 2021-04-13 | 苏州普滤得净化股份有限公司 | Layered targeted water taking method for underground water |
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| CN112727404A (en) * | 2021-01-19 | 2021-04-30 | 湖北省地质局武汉水文地质工程地质大队 | Heat-preservation water taking structure of middle-deep geothermal well |
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|---|---|
| CN106194124B (en) | 2018-10-19 |
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