CN106437628B - Based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well - Google Patents
Based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well Download PDFInfo
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- CN106437628B CN106437628B CN201610771668.5A CN201610771668A CN106437628B CN 106437628 B CN106437628 B CN 106437628B CN 201610771668 A CN201610771668 A CN 201610771668A CN 106437628 B CN106437628 B CN 106437628B
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/088—Wire screens
Abstract
The present invention provides it is a kind of based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well, including the well cementation section and filter well section arranged from top to bottom, the well cementation section includes 6 meters of long wall casings, and cement slurry recharge is used between the wall casing and well bore；The filter well section includes 6 meters of long water-permeable pipes, filter is equipped between the water-permeable pipe and well bore, and cobble is filled between water-permeable pipe and well bore；Filter well section bottom is provided with 5 meters long of precipitating well section, the diameter of the precipitating well section is less than the diameter of the well cementation section and filter well section.In the present invention, filter can obstruct the silt in underground water between water-permeable pipe and well bore, prevent silt from entering in geothermal well, when filter capability decline, since the density of silt is greater than the density of water, under gravity, silt can fall in the bottom of precipitating well section, further ensure the quality at water source in geothermal well.
Description
Technical field
The present invention relates to geothermal well technical fields, and in particular to one kind is based on farinose argillic horizon, boulder bed, argillaceous siltstoue
The geothermal well of multilayer geology.
Background technique
Underground heat is a kind of energy resource generated 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, development prospect is very wide in terms of heating and refrigerating.
Building geothermal well is the committed step utilized to geothermal energy resources, for different geology, the casing programme of geothermal well
It is not quite similar.For farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well, wherein farinose argillic horizon
For brown, part presss from both sides silt, flour sand and mud, opposite water proof；The ingredient of boulder bed is sub- circular sandstone, quartzite and flint
Deng gradation is preferable, and each ingredient mixes distribution, filling of meeting each other, and water is abundant, is good aquifer water-bearing stratum；Argillaceous siltstoue is purple
Red, iron cement matter is glued, contains gravel, and half is hard, opposite water proof.
The filtering function of geothermal well to subsequent underground heat using most important, if silt enters in geothermal well, immersible pump
Water extraction containing silt is utilized, the damage of equipment is be easy to cause, system operation is influenced, causes heavy losses；Moreover, with
The quantity that enters in geothermal well of silt increase, also result in hoistway and silt up, influence the normal use of geothermal well.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of more based on farinose argillic horizon, boulder bed, argillaceous siltstoue
The geothermal well of layer geology, to improve the quality at water source in geothermal well, while keeping the temperature at water source in geothermal well.
It is provided by the invention it is a kind of based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well, including
The well cementation section and filter well section arranged from top to bottom, the well cementation section includes 6 meters of long wall casings, the wall casing and well bore
Between use cement slurry recharge；The filter well section includes 6 meters of long water-permeable pipes, is equipped between the water-permeable pipe and well bore
Filter, and cobble is filled between water-permeable pipe and well bore；Filter well section bottom is provided with 5 meters long of precipitating well section,
The diameter of the precipitating well section is less than the diameter of the well cementation section and filter well section.
In the present invention, geothermal well is followed successively by well cementation section, filter well section and precipitating well section from top to bottom, and geothermal well is built
The geologic structure of position is divided into 5 meters of farinose argillic horizon, 7 meters of boulder bed and 5 meters of argillaceous siltstoue layer from top to bottom,
It is loosely organized due to farinose argillic horizon, and water content is few, therefore the stability in order to guarantee casing programme, and prevents cold
Water enters in geothermal well, will well cementation section depth be set to 6 meters, and by the way of 6 meters of long wall casings and recharge cement slurry into
Row is reinforced；Since the water content of boulder bed is abundant, the filter well section for being 6 meters in boulder bed setting depth is long using 6 meters
Water-permeable pipe reinforce, the filter being arranged between water-permeable pipe and well bore can by the silt in underground water obstruct water-permeable pipe with
It between well bore, prevents silt from entering in geothermal well, and fills cobble between water-permeable pipe and well bore, to be further ensured that filter
The stability of well section will not influence underground water simultaneously because filler is identical as the main component of geology locating for filter well section
Circulation；5 meters long of precipitating well section is set in filter well section bottom, when filter capability decline, is inevitably had
Silt enters in geothermal well, at this point, the density due to silt is greater than the density of water, under gravity, silt meeting
The bottom of precipitating well section is fallen in, will not be extracted out by immersible pump and enter the circulatory system, improve the quality at water source in geothermal well, due to
Argillaceous siltstoue is more hard, therefore the precipitating well section is designed as open hole, and its diameter is less than well cementation section and filter well section
Diameter can save the construction cost of geothermal well while guaranteeing casing programme intensity.
Preferably, the wall casing includes outer wall casing and interior wall casing, and the interior wall casing passes through fixed bracket and institute
Outer wall casing connection is stated, is provided with insulating layer between the outer wall casing and interior wall casing.Since well cementation section is in the upper of well bore
Side, the temperature on the stratum is lower, and the water source in geothermal well, which touches wall casing, will will lead to heat loss, therefore, in well cementation section
Place's setting insulating layer can effectively prevent the loss of water source heat in geothermal well.
Preferably, the insulating layer is polyurethane foaming layer.Using foaming technique between outer wall casing and interior wall casing shape
At polyurethane insulation coating there is good heat insulation effect, can satisfy prolonged heat preservation demand, and polyurethane material has
There are good wearability, resistance to ag(e)ing and adhesiveness, can be adapted for the use environment of geothermal well.
Preferably, the inner surface of the outer wall casing is provided with infrared-reflecting coated.Outer borehole wall pipe internal surface setting
Infrared reflection coating can reflect the infrared ray of polyurethane insulation coating, reduce the diffusion of polyurethane insulation coating heat, mention
High heat insulation effect.
Preferably, the outer surface of the interior wall casing is provided with solar energy heat absorbing coating.Since 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 a heat build-up layer is formed in the outer surface of interior wall casing, the heat for reducing interior wall casing overflows, and further improves heat preservation effect
Fruit.
Preferably, the interior wall casing and outer wall casing are stainless steel material.Using the interior wall casing of stainless steel material
The intensity that casing programme can be improved with outer wall casing, prevents well bore from collapsing, and stainless steel material is with preferable corrosion-resistant
Property, it can be adapted for water source environment complicated in geothermal well, extend the service life of geothermal well.
Preferably, the inner surface of the interior wall casing is provided with corrosion-inhibiting coating.Since the environment of underground generally all compares evil
Bad, the corrosivity at the water source in geothermal well is stronger, and corrosion-inhibiting coating is arranged in the inner surface of interior wall casing, can protect to it
Shield, prolongs its service life.
Preferably, the filter includes first level filtering device and two-stage filter, the two-stage filter setting
In in the first level filtering device；The first level filtering device includes base pipe, protection block reinforcement and packet net, and the base pipe is circle
It manages, has been evenly arranged permeable hole on the basis tube wall, the protection block reinforcement is vertically welded in basic pipe outer wall, protection gear
Muscle is equally spaced, and the packet net is wrapped in protection block reinforcement and basic pipe outer wall, and the range that packet net vertically wraps up is greater than protection
The range of block reinforcement, packet net external application iron wire are fastened in protection block reinforcement and basic pipe outer wall；The two-stage filter includes
Inner tube, outer tube, partition and filter core, said inner tube and outer tube are round tube, and inner and outer tubes are coaxially disposed, on outer tube wall uniformly
It is disposed with permeable hole, outer tube top is provided with hanging ring, and described partition one end is fixedly connected with outer wall of inner tube, the partition other end and outer
Inside pipe wall is fixedly connected, and partition will be divided into multiple chambers between inner tube and outer tube, and the filter core is filled in the cavity, chamber
Room upper and lower side is opening, for the water after filter element filtering to be discharged；The outer tube top is provided with the outer of outwardly projecting annular
Pipe excrescence, the base pipe is provided on the base pipe of inwardly projecting annular excrescence under excrescence and base pipe, described
Outer tube is passed down through excrescence inner circle on the base pipe, and outer tube excrescence is pressed on base pipe on excrescence, outer pipe bottom pressure
Under the base pipe on excrescence, rubber mat, the base pipe are lined on the base pipe between excrescence and outer tube excrescence
It is lower that rubber mat is lined between excrescence and outer pipe bottom.
Filter in the present invention includes first level filtering device and two-stage filter.Wherein first level filtering device is to silt
Coarse filtration is carried out, is mainly used for filtering out the sand of bulky grain, permeable hole has been evenly arranged on basic tube wall, packet net is wrapped in pipe
Outside, underground water will enter in geothermal well, first have to two layers of the permeable hole filtering by packet net and base pipe, filter out bulky grain
Sand.Two-stage filter carries out refined filtration to silt, is mainly used for filtering out tiny silt, two-stage filter includes interior
Pipe, outer tube, partition and filter core, inner tube is coaxially arranged with outside, and partition is the connecting framework of inner tube and outer tube, at the same by inner tube with
Space between outer tube is divided into multiple cavities, fills filter core in cavity, design in this way makes entire two-stage filter
One entirety, sound construction；Two-stage filter is mainly by two layers of the filter core being located in the permeable hole and chamber on outer tube wall
Filtering, the not set permeable hole of inner pipe wall, chamber upper and lower end are opening, after underground water enters chamber, are flowed above and below along chamber,
It is discharged from chamber upper and lower end, design in this way extends flow path of the underground water in filter core, improves filtering effect
Fruit.First level filtering device filter opening is larger, is not easy to plug, and can filter out bulky grain sand, and two-stage filter filter opening is small, is easy stifled
Plug, can filter out tiny silt, by the way of this classified filtering, can more thoroughly filter out sand and reduce
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, is combined together two-stage filter and first level filtering device, and they
Between be lined with rubber mat, rubber mat is compacted by the self weight of two-stage filter, sealing effect is good, and silt will not be flowed out from gap.
Two-stage filter is integral design, can be separated easily with excrescence under excrescence on base pipe and base pipe, can be by setting
Set the hanging ring at outer tube top end two-stage filter integrally hung out into geothermal well and cleaned, repaired or replaced, clean, repair or
Two-stage filter is hung in geothermal well again after replacement, is used in combination with first level filtering device, thus can be extended
The service life of filter further improves the quality at water source in geothermal well.
Preferably, the filter core is stainless steel filter core, is provided on the outer wall and partition of said inner tube outwardly projecting solid
Determine part, the fixing piece is for fixing the stainless steel filter core；The cross-sectional area of each chamber is equal.Stainless steel filter core tool
There is a good strainability, filtered underground water is able to satisfy system requirement, corrosion resistance, heat resistance, resistance to pressure, wear-resisting
Property is good, is able to satisfy severe underground environment, and core stomata is uniform, accurate filtering accuracy, and the flow of unit area is big, can improve
The efficiency of refined filtration improves filter efficiency, can reuse after cleaning, free of replacement, economizes on resources, reduces cost；Through coarse filtration
It after underground water afterwards enters chamber from the permeable hole of outer tube, flows along chamber, is discharged through chamber opening above and below, filter core is easy hair
Raw displacement, conglomeration, fixing piece play fixed function to stainless steel filter core, and when filtering, the flowing of water will not be such that filter core is subjected to displacement, filter
Core will not conglomeration to ensure that the normal work of filter core improve filter effect；And the cross-sectional area of each chamber is equal, into
The water of chamber is uniform out, can further promote the effect and efficiency of filtering.
Preferably, the permeable hole of the base pipe is strip-shaped hole, and the strip-shaped hole of the upper and lower adjacent two rows mutually staggers.
Using strip-shaped hole, it is able to satisfy coarse filtration requirement, upper and lower adjacent two rows mutually stagger, and so that permeable hole is more evenly distributed, filtering enters base
The underground water of plinth pipe also more evenly, can further promote the effect and efficiency of filtering.
Preferably, in order to optimize structure, the protection block reinforcement uses antirust round steel, and the round steel diameter is 4mm, between round steel
Away from for 20mm.
Preferably, the packet net is nylon yarn packet net.Nylon yarn packet net can filter out the sand of bulky grain, reach coarse filtration
It is required that.
Preferably, the iron wire uses galvanized wire, and it is 10mm that iron wire, which winds spacing,.Using galvanized wire, prevent from winding
Iron wire be broken because being corroded, cause packet net to fall off, while in order to optimize structure, it is 10mm that iron wire, which winds spacing,.
Preferably, the permeable hole of the outer tube is round hole, and left and right two column of round hole mutually stagger.Using circle
Hole is able to satisfy the requirement of refined filtration, and left and right adjacent two column mutually stagger, and so that permeable hole is more evenly distributed, into the underground water of chamber
Also more evenly, the effect and efficiency of filtering are promoted.
Preferably, the discharge area of the permeable hole of the base pipe is greater than the discharge area of the permeable hole of the outer tube.Base
The discharge area of the permeable hole of plinth pipe is greater than the discharge area of the permeable hole of outer tube, can guarantee that coarse filtration provides enough water for refined filtration
Amount promotes filter efficiency.
Preferably, the surface of the base pipe surfaces externally and internally, the surfaces externally and internally of inner tube, the surfaces externally and internally of outer tube and permeable hole
It is coated with corrosion-resistant coating.The environment of underground is generally all relatively more severe, and corrosivity is stronger, in base pipe surfaces externally and internally, inner tube
These parts directly contacted with underground water or soil of the surface of outer surface, the surfaces externally and internally of outer tube and permeable hole apply one layer of anti-corrosion
Layer is lost, the corrosion of filter component can be reduced, prolonged the service life.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 be it is of the present invention based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well structure
Schematic diagram；
Fig. 2 be it is of the present invention based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well the borehole wall
The structural schematic diagram of pipe；
Fig. 3 be it is of the present invention based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well filtering
The schematic cross-sectional view of device；
Fig. 4 is the A-A cross-sectional view of Fig. 3；
Fig. 5 is the B-B cross-sectional view of Fig. 3；
Fig. 6 is the C-C cross-sectional view of Fig. 3；
Fig. 7 be it is of the present invention based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well filtering
Structural schematic diagram of the base pipe of device in conjunction with two-stage filter；
Fig. 8 be it is of the present invention based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well filtering
The structural schematic diagram of the two-stage filter of device.
Appended drawing reference:
1- wall casing；2- water-permeable pipe；3- filter；
The outer wall casing of 11-；Wall casing in 12-；13- fixes bracket；14- polyurethane insulation coating；15- infrared reflection applies
Layer；16- solar energy heat absorbing coating；31- base pipe；32- protects block reinforcement；33- packet net；34- iron wire；35- outer tube；36- inner tube；
37- chamber；38- partition；39- permeable hole；
Excrescence on 311- base pipe；Excrescence under 312- base pipe；351- outer tube excrescence；352- hanging ring；361- is solid
Determine part.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
As shown in Figure 1, the main component that geothermal well builds the geologic structure of position in the present embodiment is followed successively by 5 from top to bottom
Rice farinose argillic horizon, 7 meters of boulder bed and 5 meters of argillaceous siltstoue layer, wherein farinose argillic horizon it is loosely organized, it is aqueous
Amount is few, and the structure of boulder bed is also loose, but aqueous abundant, the structure relative close of argillaceous siltstoue, and stability is preferable；Cause
This, the quality at water source in the stability and geothermal well in order to guarantee casing programme is provided in an embodiment of the present invention a kind of based on powder
Matter argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well, be followed successively by from top to bottom well cementation section, filter well section and
Well section is precipitated, wherein well cementation section is 6 meters, is correspondingly reinforced using 6 meters long of wall casing 1, is used between wall casing 1 and well bore
Cement slurry recharge, to improve the stability of geothermal well；Filter well section is 6 meters, is correspondingly reinforced using 6 meters long of water-permeable pipe 2,
It is equipped with filter 3 between water-permeable pipe 2 and well bore, and fills cobble between water-permeable pipe 2 and well bore, further consolidates well bore knot
The stability of structure, the underground water in boulder bed is flowed into geothermal well from the hole on water-permeable pipe 2 via filter 3, after filtering
Quality of groundwater be improved, the content of silt is greatly decreased in water, can meet the subsequent benefit to the water source in geothermal well
Use demand；The open hole that well section is 5 meters is precipitated, diameter is less than the diameter of well cementation section and filter well section, when under filter capability
When drop, inevitably has silt and enter in geothermal well, at this point, the density due to silt is greater than the density of water,
Under the action of gravity, silt can fall in the bottom of precipitating well section, will not be extracted out by immersible pump and enter the circulatory system, be further ensured that
The quality at water source in geothermal well.
As shown in Fig. 2, the wall casing 1 includes outer wall casing 11 and interior wall casing 12, which passes through fixation
Bracket 13 is connect with outer wall casing 11, and the polyurethane heat-insulation that foaming is formed is provided between outer wall casing 11 and interior wall casing 12
Layer 14, since well cementation section is in the top of well bore, the temperature on the stratum is lower, and the water source in geothermal well touches interior wall casing 12
Heat loss will be will lead to, therefore, setting insulating layer can effectively prevent the loss of water source heat in geothermal well at well cementation section；Institute
The inner surface for stating outer wall casing 11 is equipped with infrared-reflecting coated 15, this infrared-reflecting coated 15 is with thermoset resin material
For film formation at low temp substance, using low melting point and the special crown glass binder of low-expansion coefficient as high temperature bonding material, through special work
A kind of with infrared external reflection function, the strong and nontoxic and pollution-free organo-mineral complexing of high temperature resistant, caking property of skill processing preparation
Coating can reflect the infrared ray of polyurethane insulation coating 14, reduce the diffusion of 14 heat of polyurethane insulation coating, improve and protect
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 for stating interior wall casing 12 is equipped with solar energy heat absorbing coating 16, infrared ray can be preferably absorbed, thus in interior wall casing
12 outer surface forms a heat build-up layer, and the heat for reducing interior wall casing 12 overflows, and further improves heat insulation effect, the sun
Energy heat absorbing coating 16 is the anodized coating of steel, has the characteristics that humidity, suitable for the use environment in geothermal well.
Above-mentioned outer wall casing 11 and interior wall casing 12 are stainless steel material, and the intensity of casing programme can be improved, prevent
Well bore collapses, and stainless steel material has preferable corrosion resistance, can be adapted for water source environment complicated in geothermal well, prolongs
The service life of long geothermal well
Further, since the environment of underground is generally all relatively more severe, the corrosivity at the water source in geothermal well is stronger, therefore upper
The inner surface for stating interior wall casing 12 is provided with corrosion-inhibiting coating, further to protect to it, prolongs its service life.This implementation
The corrosion-inhibiting coating that example uses is using polyurethane modified epoxy resin as substrate, with mica iron oxide red for main pigments and fillers, to not
Rust steel surface has stronger adhesive force, can work and not fall off for a long time under the environment of geothermal well humidity.
As shown in fig. 3 to 7, the filter includes first level filtering device and two-stage filter, two-stage filter setting
In in first level filtering device；First level filtering device includes circular base pipe 31, protection block reinforcement 32 and packet net 33, and base pipe 31 is managed
Permeable hole 39 is evenly arranged on wall, permeable hole 39 is strip-shaped hole, and upper and lower adjacent two rows mutually stagger, and protection block reinforcement 32 uses
Diameter is the antirust round steel of 4mm, is vertically welded on 31 outer wall of base pipe, its spacing 20mm, and packet net 33 is nylon yarn packet net
33, it is wrapped on protection block reinforcement 32 and 31 outer wall of base pipe, the range that packet net 33 vertically wraps up is greater than the range of protection block reinforcement 32,
33 external application galvanized wire 34 of packet net is fastened in protection block reinforcement 32 and 31 outer wall of base pipe with 10mm spacing；Secondary filtration dress
It sets including inner tube 36, outer tube 35, partition 38 and filter core, inner tube 36 and outer tube 35 are round tube, and inner tube 36 and outer tube 35 are coaxially set
It sets, permeable hole 39 has been evenly arranged on 35 tube wall of outer tube, permeable hole 39 is round hole, and left and right two column mutually stagger, base pipe
The discharge area of permeable hole 39 is greater than the discharge area of the permeable hole 39 of outer tube, the setting of 35 top of outer tube there are four hanging ring 352, every
38 one end of plate is fixedly connected with 36 outer wall of inner tube, and 38 other end of partition is fixedly connected with 35 inner wall of outer tube, and partition 38 is by inner tube 36
The equal chamber 37 of multiple cross-sectional areas is divided between outer tube 35, filter core uses stainless steel filter core, is filled in chamber 37,
37 upper and lower side of chamber is opening, for the water after filter element filtering to be discharged, is provided on the outer wall and partition 38 of inner tube 36 outward
Fixing piece 361 outstanding, fixing piece 361 is for fixing stainless steel filter core, the interior appearance of 31 surfaces externally and internally of base pipe, inner tube 36
The surface in face, the surfaces externally and internally of outer tube 35 and permeable hole 39 is coated with corrosion-resistant coating；35 top of outer tube is provided with outwardly projecting
Annular outer tube excrescence 351, base pipe 31 are provided on inwardly projecting ring foundation pipe and protrude under excrescence 311 and base pipe
Body 312, outer tube 35 are passed down through 311 inner circle of excrescence on base pipe, and outer tube excrescence 351 is pressed in excrescence 311 on base pipe
On, 35 bottom of outer tube is pressed under base pipe on excrescence 312, is lined between excrescence 311 and outer tube excrescence 351 on base pipe
Rubber mat is lined with rubber mat between 35 bottom of excrescence 312 and outer tube under base pipe.
Wherein first level filtering device carries out coarse filtration to silt, is mainly used for filtering out the sand of bulky grain；Base pipe 31 is managed
Bar shaped permeable hole 39 has been evenly arranged on wall, upper and lower adjacent two rows mutually stagger, and permeable hole 39 is made to be more evenly distributed, filter into
Enter the underground water of base pipe 31 also more evenly, nylon yarn packet net 33 is wrapped in outside pipe by protection 32 pad of block reinforcement, uses galvanized iron
Silk 34 is fixed, and underground water will enter in geothermal well, first has to two layers of mistake of permeable hole 39 by nylon yarn packet net 33 and base pipe
Filter, filters out the sand of bulky grain.Two-stage filter carries out refined filtration to silt, is mainly used for filtering out tiny silt, and two
Grade filter device includes inner tube 36, outer tube 35, partition 38 and filter core, and inner tube 36 and outer tube 35 are coaxially arranged, and partition 38 is inner tube
36 with the connecting framework of outer tube 35, while the space between inner tube 36 and outer tube 35 is divided into the equal chamber of multiple cross-sectional areas
37, segmentation filtering in this way, each 37 water of chamber is uniform, can promote the effect and efficiency of filtering, fill not in chamber 37
Become rusty steel filter core, and design in this way makes one entirety of entire two-stage filter, sound construction；Meanwhile stainless steel filter core
With good strainability, filtered underground water is able to satisfy system requirement, corrosion resistance, heat resistance, resistance to pressure, resistance to
Mill property is good, is able to satisfy severe underground environment, and core stomata is uniform, accurate filtering accuracy, and the flow of unit area is big, can mention
The efficiency of high refined filtration meets system water demand, can reuse after cleaning, free of replacement, economizes on resources, reduces cost；
Two-stage filter is mainly by two layers of filter core filtering in the permeable hole 39 and chamber 37 being located on 35 tube wall of outer tube, permeable hole 39
Upper and lower adjacent two column mutually stagger, and permeable hole 39 is made to be more evenly distributed, into chamber 37 underground water also more evenly；Base pipe
Permeable hole 39 discharge area be greater than outer tube permeable hole 39 discharge area, can guarantee that coarse filtration provides enough water for refined filtration
Amount promotes filter efficiency；The not set permeable hole 39 of inner tube 36,37 upper and lower end of chamber opening, after underground water enters chamber 37, to
The flowing of 37 both ends of chamber, is discharged from 37 upper and lower end of chamber, and design in this way extends flowing of the underground water in filter core
Path improves filter effect, and since in filter process, filter core is easy to happen displacement, conglomeration, fixing piece 361 filters stainless steel
Core plays fixed function, and when filtering, the flowing of water will not be such that filter core is subjected to displacement, filter core will not conglomeration, to ensure that filter core
It works normally, improves filter effect；The environment of underground is generally all relatively more severe, and corrosivity is stronger, the appearance in base pipe 31
Face, the surfaces externally and internally of inner tube 36, the surfaces externally and internally of outer tube 35 and permeable hole 39 surface these directly connect with underground water or soil
The part of touching applies one layer of corrosion-resistant coating, can reduce the corrosion of filter component, prolong the service life.
First level filtering device filter opening is larger, is not easy to plug, and can filter out bulky grain sand, and two-stage filter filter opening is small,
Be easy blocking, tiny silt can be filtered out, by the way of this classified filtering, can more thoroughly filter out sand and
Reduce the probability of plugged filter.
Outer tube 35 is passed down through 311 inner circle of excrescence on base pipe, and outer tube excrescence 351 is pressed in excrescence on base pipe
On 311,35 bottom of outer tube is pressed under base pipe on excrescence 312, by this dismountable mode by two-stage filter and
First level filtering device is combined together, and in combination with rubber mat is lined between position, is compacted by the self weight of two-stage filter
Rubber mat, sealing effect is good, and silt will not be flowed out from gap；Two-stage filter and first level filtering device detachably separate, can be with
Two-stage filter is integrally lifted to cleaning, maintenance or replacement, cleaning, maintenance by the hanging ring 352 that 35 top of outer tube is arranged
Or again hang in two-stage filter in geothermal well after replacement, it is used in combination with first level filtering device, to improve
The quality at water source in geothermal well.
Filter described in the present embodiment draw water it is different with the method for operation in recharge, it is specific as follows:
When drawing water, first level filtering device and two-stage filter collective effect are needed, secondary protection device is hung in into underground heat
In well, outer tube 5 is passed down through 311 inner circle of excrescence on base pipe, and outer tube excrescence 351 is pressed on base pipe on excrescence 311,
It is fitted together with first level filtering device, the underground water containing silt flows through nylon yarn packet net 33, through the bar shaped on base pipe 31
Permeable hole 39 enters in geothermal well, completes the level-one of silt by the filtering of nylon yarn packet net 33 and bar shaped permeable hole 39 outside well
Filtering；Underground water after coarse filtration enters chamber 37 through the round permeable hole on outer tube 35, the refined filtration through stainless steel filter core, from
The upper and lower open discharge of chamber 37, completes the secondary filtration of silt, to obtain the underground water source for meeting production requirement.
Recharge is that the water source after utilization is gone back to underground through underground heat well irrigation to need to reduce the resistance of recharge by second level
Filter device is integrally hung out outside well, and recharge water is flowed out through the bar shaped permeable hole 39 on base pipe 31, then penetrates nylon yarn packet net
33 flow back into underground, with flow direction when filtering that draws water on the contrary, play the role of cleaning to first level filtering device, prevent filter opening stifled
Plug, meanwhile, after two-stage filter is hung out, it can be cleaned, repaired or be maintained.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment, or some or all of the technical features are equal
Replacement；And these are modified or replaceed, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses, should all cover within the scope of the claims and the description of the invention.
Claims (9)
1. it is a kind of based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well, including what is arranged from top to bottom
Section of cementing the well and filter well section, it is characterised in that:
The well cementation section includes 6 meters of long wall casings, and cement slurry recharge is used between the wall casing and well bore；
The filter well section includes 6 meters of long water-permeable pipes, filter is equipped between the water-permeable pipe and well bore, and in water-permeable pipe
Cobble is filled between well bore；
Filter well section bottom is provided with 5 meters long of precipitating well section, the diameter of the precipitating well section is less than the well cementation section
With the diameter of filter well section；
The filter includes first level filtering device and two-stage filter, and the two-stage filter is set to the level-one mistake
It filters in device；
The first level filtering device includes base pipe, protection block reinforcement and packet net, and the base pipe is round tube, the basis tube wall
On be evenly arranged permeable hole, the protection block reinforcement is vertically welded in basic pipe outer wall, protection block reinforcement be equally spaced, it is described
Packet net is wrapped in protection block reinforcement and basic pipe outer wall, and the range that packet net vertically wraps up is greater than the range of protection block reinforcement, and packet net is outer
It is fastened in protection block reinforcement and basic pipe outer wall with iron wire；
The two-stage filter includes inner tube, outer tube, partition and filter core, and said inner tube and outer tube are round tube, inner tube and outer
Pipe coaxial arrangement, has been evenly arranged permeable hole on outer tube wall, and outer tube top is provided with hanging ring, outside described partition one end and inner tube
Wall is fixedly connected, and the partition other end is fixedly connected with outer tube wall, and partition will be divided into multiple chambers, institute between inner tube and outer tube
State filter core filling in the cavity, chamber upper and lower side is opening, for the water after filter element filtering to be discharged；The outer tube top
It is provided with the outer tube excrescence of outwardly projecting annular, the base pipe is provided with prominent on the base pipe of inwardly projecting annular
Excrescence under body and base pipe, the outer tube are passed down through excrescence inner circle on the base pipe, and outer tube excrescence is pressed in basis
On pipe on excrescence, outer pipe bottom is pressed under the base pipe on excrescence, excrescence and outer tube excrescence on the base pipe
Between be lined with rubber mat, rubber mat is lined between excrescence and outer pipe bottom under the base pipe.
2. it is according to claim 1 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The wall casing includes outer wall casing and interior wall casing, and the interior wall casing passes through fixed bracket and the outer wall casing connects
It connects, is provided with insulating layer between the outer wall casing and interior wall casing.
3. it is according to claim 2 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The insulating layer is polyurethane foaming layer.
4. it is according to claim 2 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The inner surface of the outer wall casing is provided with infrared-reflecting coated.
5. it is according to claim 4 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The outer surface of the interior wall casing is provided with solar energy heat absorbing coating.
6. it is according to claim 2 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The interior wall casing and outer wall casing are stainless steel material.
7. it is according to claim 6 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The inner surface of the interior wall casing is provided with corrosion-inhibiting coating.
8. it is according to claim 1 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The filter core is stainless steel filter core, is provided with outwardly projecting fixing piece on the outer wall and partition of said inner tube, described solid
Part is determined for fixing the stainless steel filter core；The cross-sectional area of each chamber is equal.
9. it is according to claim 1 based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well,
It is characterized in that:
The permeable hole of the base pipe is strip-shaped hole, and the strip-shaped hole of upper and lower adjacent two rows mutually staggers.
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|---|---|---|---|
| CN201610771668.5A CN106437628B (en) | 2016-08-30 | 2016-08-30 | Based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well |
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|---|---|---|---|
| CN201610771668.5A CN106437628B (en) | 2016-08-30 | 2016-08-30 | Based on farinose argillic horizon, boulder bed, argillaceous siltstoue multilayer geology geothermal well |
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| CN106437628B true CN106437628B (en) | 2018-12-18 |
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| JPS60244315A (en) * | 1984-05-17 | 1985-12-04 | Nagaoka Kinmo Kk | Cylindrical screen and preparation thereof |
| AU597018B2 (en) * | 1985-12-27 | 1990-05-24 | Nagaoka Kanaami Kabushiki Kaisha | Double cylinder screen |
| CN2304696Y (en) * | 1997-08-21 | 1999-01-20 | 辽河石油勘探局供水公司 | Cage-shape sandproof screening pipe for water well |
| CN102251760A (en) * | 2011-04-12 | 2011-11-23 | 邯郸市伟业地热开发有限公司 | Loose bed and bedrock layer mixed water-intaking and well-forming process for geothermal well |
| CN105275406A (en) * | 2014-06-19 | 2016-01-27 | 中国石油化工股份有限公司 | Heat insulation well completion device and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60244315A (en) * | 1984-05-17 | 1985-12-04 | Nagaoka Kinmo Kk | Cylindrical screen and preparation thereof |
| AU597018B2 (en) * | 1985-12-27 | 1990-05-24 | Nagaoka Kanaami Kabushiki Kaisha | Double cylinder screen |
| CN2304696Y (en) * | 1997-08-21 | 1999-01-20 | 辽河石油勘探局供水公司 | Cage-shape sandproof screening pipe for water well |
| CN102251760A (en) * | 2011-04-12 | 2011-11-23 | 邯郸市伟业地热开发有限公司 | Loose bed and bedrock layer mixed water-intaking and well-forming process for geothermal well |
| CN105275406A (en) * | 2014-06-19 | 2016-01-27 | 中国石油化工股份有限公司 | Heat insulation well completion device and method |
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| CN106437628A (en) | 2017-02-22 |
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