CN108278787B - A kind of high efficiency of energy based on geothermal exploitation well utilizes winning apparatus and method - Google Patents
A kind of high efficiency of energy based on geothermal exploitation well utilizes winning apparatus and method Download PDFInfo
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- CN108278787B CN108278787B CN201810006233.0A CN201810006233A CN108278787B CN 108278787 B CN108278787 B CN 108278787B CN 201810006233 A CN201810006233 A CN 201810006233A CN 108278787 B CN108278787 B CN 108278787B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000010410 layer Substances 0.000 claims abstract description 157
- 239000000565 sealant Substances 0.000 claims abstract description 52
- 239000002344 surface layer Substances 0.000 claims abstract description 20
- 238000010992 reflux Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 239000011435 rock Substances 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 31
- 238000009434 installation Methods 0.000 claims description 31
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 description 7
- 239000002918 waste heat Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 230000036982 action potential Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000005439 thermosphere Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/10—Setting of casings, screens, liners or the like in wells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a kind of high efficiency of energy based on geothermal exploitation well to utilize winning apparatus and method, including adopting hot well, inverted well and adopting the surface layer of shutting off on the left of hot well, and it is connected to the multi-stage user system adopted between hot well and inverted well, adopting hot well includes inner layer sleeve and outer layer sleeve, sealant A and sealant B are provided between outer layer sleeve and inner layer sleeve, the inner layer sleeve of the bottom sealant B forms back cavity, back cavity left side wall is provided with influent stream face, the pipe shaft that inner layer sleeve is located inside back cavity is provided with aperture layer casing, double pressure pipes are vertically arranged between inner layer sleeve and outer layer sleeve, inverted well includes back well outer tube and returns well inner sleeve, it returns well outer tube and returns forming layer reflux chamber between well inner sleeve, layer reflux top of chamber is provided with sealant C, it returns well inner sleeve bottom of the tube and is provided with through-hole foundation ring, positioned at sealant Returning on casing left side wall for the bottom C is provided with first jet pipe, and the resource for realizing geothermal well is effectively exploited and utilized.
Description
Technical field
The present invention relates to geothermal wells to exploit field, and specially a kind of high efficiency of energy based on geothermal exploitation well is set using exploitation
Standby and method.
Background technique
Geothermal well refers to the thermal water of 3500 meters of well depth or so of geothermal energy or water temperature greater than 30 DEG C to generate electricity
Method and apparatus, underground heat divide high temperature, in mild low temperature three classes, be higher than 150 DEG C, it is existing in vapour form, belong to high-temperature geothermal, 90
DEG C~150 DEG C, in the form of mixture of water and steam etc. existing for, belong to medium temperature underground heat；Higher than 25 DEG C, be lower than 90 DEG C, with warm water,
Existing for the forms such as warm water, hot water, belong to low temperature underground heat, is utilized in technology in existing geothermal energy resources, some usually used
It is even higher that the leaving water temperature of geothermal well can be up to 95 DEG C, and reaches 45 DEG C of supply water temperature when being used for building and heating
It meets the requirements, it is common practice to by the heat exchange of 95 DEG C of GEOTHERMAL WATER at 45 DEG C of heating water and heat provision, the underground heat of lower temperature
Water using cascade utilization or can be adjusted to the slightly lower water temperature of temperature as the heat source of compression heat pump, to further decrease itself temperature
Degree, then recharge, the above process needs to consume other energy, to geothermal heat using insufficient, simultaneously because region is not
Together, in the difference of strata structure, so that deep earth heart can be with high temperature dry-hot-rock geothermal in underground heat using upper also difference
It further include all high temperature geothermal energy resources with underground heat extraction value based on resource, such as die mould underground heat, studies show that,
Single regional, ground die mould underground heat recoverable reserves is about 2.74 × 1019J in 2000-6000m, hot dry rock in 3000-8000m
Hot recoverable reserves is about 1.49 × 1021J, and tens times of about 2014 national total energy consumptions.
Exploitation utilizes geothermal energy resources technology at present, is mainly limited to exploitation of the underground heat well depth within the scope of 3500 meters and utilizes certainly
Right shallow geothermal energy technology, i.e., shallow underground heat water layer or carbonated drink layer finite region range Nei Kaicaili in explored shallow geothermal area
With, the major defect that existing shallow geothermal energy resources exploitation utilizes be the GEOTHERMAL WATER adopted by self-spray energy to after the well head of ground and
The geothermal energy temperature of vapor, pressure, spray vapour quantity etc. are universal relatively low, generally within 40~150 DEG C, most of geothermal areas
150 DEG C of the geothermal power generation temperature and injection pressure for being extremely difficult to minimum are required up to 5Mpa energy above, Gu in the use of underground heat
On, mostly relatively simple, most underground heat is wasted utilizations, and utilization efficiency is not also high, meanwhile, with shallowly underground heat paneling naturally
The extension of the time limit, often will cause shallow GEOTHERMAL WATER, self-spray vapour quantity, pressure, the water level of vapour layer successively decrease, and will appear ground benefit
Fill the rough sledding such as underground heat water layer water difficulty and surface subsidence:
For example, patent name is a kind of geothermal area deep layer and non-geothermal area ultra deep underground heat application No. is 99104276.X
The exploitation of the energy utilizes the patent of invention of method:
Wherein by the deep geothermal well or ultra-deep underground heat horizontal well in geothermal area or non-geothermal area brill, underground heat is equipped on ground
Energy power station, heat exchange generates the outer defeated of pure domestic hot-water when generating waste-heat steam condenses, using ultra-deep underground heat horizontal well under
Double sets adopt heat pipe column, Lai Shixian deep geothermal heat heating.
But the method that prior art provides has the following deficiencies:
(1) existing whole set of installation is required to biggish investment, is opened in deep geothermal well or ultra-deep underground heat horizontal well
Well needs more professional deep-well equipment, and exploitation degree is larger, while being easy occur avalanche during exploitation, and deeply
Hot well or ultra-deep underground heat horizontal well adopt hot well exploitation after, the investment and construction of inverted well will occupy bigger part, deep-well and
Also relatively difficult, larger, the Wu Fayou of thermosphere distribution of deep geothermal well or ultra-deep underground heat horizontal well is cleared up in the plant maintenance of ultradeep well
The heat of the hot dry rock using upper layer of effect, waste of resource；
(2) existed using the pure water that the condensation of generating waste-heat steam generates, need to influence whole using the electricity in power generation process
The effect of body power generation, while a large amount of thermal wastewater after power generation can not be utilized.
Summary of the invention
In order to overcome the shortcomings of that prior art, the present invention provide a kind of high efficiency of energy utilization based on geothermal exploitation well
Winning apparatus and method can effectively solve the problem of background technique proposes.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of high efficiency of energy based on geothermal exploitation well utilizes winning apparatus and method, including adopt hot well, inverted well and
The surface layer of shutting off on the left of hot well is adopted, and is connected to the multi-stage user system adopted between hot well and inverted well, it is described to adopt hot well packet
Inner layer sleeve and outer layer sleeve are included, sealant A and sealant B are provided between the outer layer sleeve and inner layer sleeve, and described
Formed between sealant A and sealant B and stream chamber, if it is described stream on chamber two sidewalls spaced set respectively have stem grafting flow tube and
The inner layer sleeve of flat fire pipe, the bottom the sealant B forms back cavity, and the back cavity left side wall is provided with influent stream face, described
The pipe shaft that inner layer sleeve is located inside back cavity is provided with aperture layer casing, longitudinally disposed between the inner layer sleeve and outer layer sleeve
There are double pressure pipes；
The inverted well includes back well outer tube and returns well inner sleeve, and between described time well outer tube and time well inner sleeve
Forming layer reflux chamber, the layer reflux top of chamber are provided with sealant C, and described time well inner sleeve bottom of the tube is provided with through-hole foundation ring,
Returning on casing left side wall for the bottom sealant C is provided with just jet pipe.
Further, the multi-stage user system includes being mounted on the sand cleaning machine adopted on hot well, and the sand cleaning machine passes through pipe
Road is connected with first-class heat exchanger and secondary heat exchanger, and the first-class heat exchanger is connected with water tank by pipeline, and the level-one is changed
Hot device is connected with inverted well by pipeline, and primary user is provided on the heat exchanging water pipe of the secondary heat exchanger, and the second level is changed
Hot device is connected with three-level heat exchanger by pipeline, and evaporator, the evaporator are connected on the pipeline of the three-level heat exchanger
The heat exchange of condenser is realized by pipeline, and secondary user is set on the pipeline of condenser, is led on the pipeline of the condenser
Piping is connected with triple valve, and the pipeline that three-level heat exchanger connects inverted well with first-class heat exchanger is arranged in the triple valve
On.
Further, the surface layer of shutting off includes shut off guide pipe, and the filled layer at the top of the guide pipe that shuts off, described
The guide pipe that shuts off includes arc column chamber, and the arc column chamber connects to be formed with rear real face by preceding hole face, and the preceding hole face and is adopted
Hot well is opposite.
Further, the sealant A and sealant B are separately positioned at 1/3 pipe shaft and 2/3 pipe shaft of inner layer sleeve,
The sealant C is arranged in back at 1/4 pipe shaft of well inner sleeve；The perforation angle for connecing flow tube on the right side of outer layer sleeve is
45 °, flat fire pipe and first jet pipe are horizontal perforation.
Further, double pressure pipes include forcing pipe A and forcing pipe B, and are set between the forcing pipe A and forcing pipe B
It is equipped with solenoid valve, the forcing pipe A longitudinally runs through sealant A and extends to intracavitary portion of streaming, and the forcing pipe B passes through sealant B
It extends to inside back cavity, double pressure pipes are connected with pressurization pump group, and the pressurization pump group is provided with extends into reflux simultaneously
The pipeline in intracavitary portion.
Further, a kind of high efficiency of energy based on geothermal exploitation well utilizes recovery method, includes the following steps
Step 100 adopt using conventional drilling equipment driving a well for hot well and inverted well；
Step 200, installation perforating apparatus, the two aperture well side walls for carrying out flat fire pipe respectively, connecing flow tube and first jet pipe
Perforation；
Step 300, the installation for adopt hot well inner layer sleeve and outer layer sleeve, adopt after hot well is installed and install inverted well
Return well outer tube and return well inner sleeve installation casting；
Step 400, after the completion of adopting hot well and inverted well, on adopting hot well and inverted well connect multi-stage user system；
Step 500 adopt flat fire pipe formation second level fluid layer detection on the left of hot well
The setting installation of step 600, the surface layer that shut off.
Further, the step 100 further include: when two open and mention brill, more bit change by drilling well enlarged-diameter to connect stream
The nozzle of pipe is drilled into upper layer hot dry rock to the linear distance between the nozzle of flat fire pipe, after mentioning brill, replaces initial diameter drill bit,
Until hot dry rock middle layer, mention after brill replacement to and the identical drill bit in inner layer sleeve aperture, up to hot dry rock middle layer bottom.
Further, by Perforation head spaced set in the step 200, and go deep into two and open diameter bottom of the tube, use
Perforating bullet, the rear outer layer sleeve installation for being provided with influent stream face for carrying out hot dry rock bottom, installation to two apertures are ignited in ground igniting
When diameter section, cement slurry will be passed through between outer layer sleeve and wellbore and cement sheath seals, until earth's surface.
Further, the step 300 further include: after outer layer sleeve well cementation installation, install band in outer layer inside pipe casing
There is aperture layer casing inner layer sleeve, in installation to two aperture diameter section, the sealing of top layer carried out by cement sheath, forms sealant B,
At installation to hot dry rock upper layer bottom, sealant A is formed by cement sheath.
Further, the step 400 further include: after the outer layer sleeve of heating well is installed, pass through drilling equipment
The exploitation of inverted well is carried out, two replace when opening to the drill bit of first jet pipe add-back well outer tube diametral distance, after mentioning brill, more gain
The drill bit of well housing pipe diameter, while eccentric well is until hot dry rock middle layer.
Compared with prior art, the beneficial effects of the present invention are:
(1) of the invention to adopt hot well and inverted well is all made of double-layer sleeve structure, while adopting hot well realization and adopting heat, return
Guan Jing and adopting carries out effective hydraulic pressure and temperature control between hot well, utilize, and the reflux thermal wastewater of inverted well passes through back in invention
The through-hole foundation ring of well inner sleeve bottom of the tube flows into reflux chamber, the upper layer of hot dry rock is injected by first jet pipe, and by clearance flow between soil property
Flow tube section is connect to adopt hot well, is streamed in chamber by throttle pipe inflow, in first jet pipe and connect the hot dry rock shape between flow tube
At level-one fluid layer, the spent hot water in level-one fluid layer is continued to spray to lateral hot dry rock by flat fire pipe, thus shut off surface layer it
Between formed second level fluid layer, from shut off surface layer flow out spent hot water enter in back cavity further through the influent stream face on outer layer sleeve, and
It is again introduced into inner layer sleeve by aperture layer casing, realizes spent hot water prolonging by the lateral hot dry rock level after inverted well
It stretches, carries out the auxiliary heat of second level using hot dry rock top part unused heat, realize the heat effective use of each rock stratum, reach ground
The effective exploitation of hot well bottom resource, connects flow tube and first jet pipe forms certain segment difference, and just jet pipe and connects between flow tube
Spent hot water in the level-one fluid layer of formation has biggish oblique action potential conversion, can form biggish stream on hot dry rock upper layer
Face carries the fixed unemployed heat in top of more hot dry rocks, reaches the effective use of underground heat, while by inverted well to adopting heat
Well Water Level and hydraulic pressure are divided into two parts, the waste heat water flowing of recharge bottom and the side formed by level-one fluid layer and second level fluid layer
It is supplemented to auxiliary, level-one fluid layer and second level fluid layer can carry out preliminary heat recovery, prevent using the heat on hot dry rock surface layer
Adopt hot well part heat disperse it is too fast, caused by the temperature of GEOTHERMAL WATER quickly reduce, and flowed in level-one fluid layer and second level fluid layer
The spent hot water crossed can be by rock stratum purification filtering well, so that waste heat water impurity tails off；
(2) multi-stage user system of the invention realizes GEOTHERMAL WATER by the three-level GEOTHERMAL WATER heat exchange operation of three heat exchangers
The effective use of spent hot water after heat exchange, first-class heat exchanger are connected with water tank by pipeline, and first-class heat exchanger passes through pipeline
It is connected with inverted well, primary user is provided on the heat exchanging water pipe of secondary heat exchanger, secondary heat exchanger is connected with three by pipeline
Grade heat exchanger, first-class heat exchanger directly extract the GEOTHERMAL WATER adopted in hot well out, by sand cleaning machine and corresponding filter device, directly
It is applied in domestic water, and can be stored by water tank, the hot water after heat exchange is supplied to level-one by secondary heat exchanger
User, the low-temperature water heating after secondary heat exchanger exchanges heat are sent into three-level heat exchanger, and by the condenser on three-level heat exchanger
With the heat-exchanger rig of evaporator composition, ground heating air conditioning plant is formed, realizes the refrigeration and heating needs of secondary user.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is section fluid layer schematic perspective view of the invention；
Figure label:
1- adopts hot well；2- inverted well；3- shuts off guide pipe；4- second level fluid layer；5- filled layer；6- level-one fluid layer；7- pressurization
Pump group；The bis- pressure pipes of 8-；9- secondary heat exchanger；10- first-class heat exchanger；11- water tank；12- primary user；13- water supply tank；14-
Evaporator；15- condenser；16- secondary user；17- triple valve；18- three-level heat exchanger；19- sand cleaning machine；20- multi-stage user system
System；21- shuts off surface layer；
101- inner layer sleeve；102- aperture layer casing；103- influent stream face；104- outer layer sleeve；105- forcing pipe B；106- electricity
Magnet valve；107- flat fire pipe；108- sealant B；109- sealant A；110- connects flow tube；111- forcing pipe A；112- streams chamber；
113- back cavity；The outer Gu Quan of 114-；
201- returns well outer tube；202- returns well inner sleeve；203- through-hole foundation ring；204- sealant C；The first jet pipe of 205-；
206- reflux chamber；
301- arc column chamber；Real face after 302-；Hole face before 303-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As depicted in figs. 1 and 2, the present invention provides a kind of high efficiency of energy based on geothermal exploitation well using winning apparatus and
Method including adopting hot well 1, inverted well 2 and adopting the surface layer 21 of shutting off in the left side of hot well 1, and is connected to and adopts hot well 1 and inverted well
Multi-stage user system 20 between 2, the hot well 1 of adopting includes inner layer sleeve 101 and outer layer sleeve 104, the outer layer sleeve 104
Be provided with sealant A109 and sealant B108 between inner layer sleeve 101, and the sealant A109 and sealant B108 it
Between formed and stream chamber 112, stream on 112 two sidewalls of chamber that spaced set has stem grafting flow tube 110 and flat fire pipe respectively if described
The inner layer sleeve 101 of the bottom 107, the sealant B108 forms back cavity 113,113 left side wall of back cavity be provided with into
Stream interface 103, the pipe shaft that the inner layer sleeve 101 is located inside back cavity 113 are provided with aperture layer casing 102, the inner layer sleeve
Double pressure pipes 8 are vertically arranged between 101 and outer layer sleeve 104；
The inverted well 2 includes back well outer tube 201 and returns well inner sleeve 202, and described time well outer tube 201 and Hui Jing
Forming layer reflux chamber 206 between inner sleeve 202 is provided with sealant C204, described time well inner sleeve at the top of the layer reflux chamber 206
202 bottom of pipe is provided with through-hole foundation ring 203, and returning on 202 left side wall of casing for the bottom sealant C204 is provided with first penetrate
Flow tube 205.
The reflux thermal wastewater of inverted well 2 flows into reflux by going back to the through-hole foundation ring 203 of 202 bottom of well inner sleeve in the present invention
In chamber 206, and under the pressurization for increasing pump group, the upper layer of hot dry rock is injected by first jet pipe 205, and adopted by soil property gap flow direction
Hot well 1 connects 110 sections of flow tube, is streamed in chamber 112 by throttle pipe inflow, in first jet pipe 205 and connect between flow tube 110
Hot dry rock forms level-one fluid layer 6, and the spent hot water in level-one fluid layer 6 is continued to spray to lateral hot dry rock by flat fire pipe 107, thus
Second level fluid layer 4 is formed between the surface layer 21 of shutting off, from shut off spent hot water that surface layer 21 flows out further through on outer layer sleeve 104 into
Stream interface 103 enters in back cavity 113, and is again introduced into inner layer sleeve 101 by aperture layer casing 102, realizes spent hot water and passes through
The extension of lateral hot dry rock level after inverted well carries out the auxiliary heat of second level using hot dry rock top part unused heat；
Since sealant A109 and sealant B108 are separately positioned at 1/3 pipe shaft and 2/3 pipe shaft of inner layer sleeve 101,
Sealant C204 is arranged in back at 1/4 pipe shaft of well inner sleeve 202 so that connect flow tube 110 and first jet pipe 205 formed it is certain
Segment difference, and just jet pipe 205 and the spent hot water connect in the level-one fluid layer 6 formed between flow tube 110 have biggish oblique kinetic potential
It can convert, biggish stream interface can be formed on hot dry rock upper layer, carry the fixed unemployed heat in top of more hot dry rocks, reach
To the effective use of underground heat, while by inverted well 2 to adopting 1 water level of hot well and hydraulic pressure is divided into two parts, the waste heat of 2 bottom of inverted well
Water flowing and the lateral auxiliary supplement formed by level-one fluid layer 6 and second level fluid layer 4, level-one fluid layer 6 and second level fluid layer 4 being capable of benefits
With the heat on hot dry rock surface layer, preliminary heat recovery is carried out, prevents the heat for adopting 1 part of hot well from dispersing too fast, caused by
The temperature of hot water quickly reduces, and the spent hot water flowed through in level-one fluid layer 6 and second level fluid layer 4 can be cleaned well by rock stratum
Filter, so that waste heat water impurity tails off.
The multi-stage user system 20 includes being mounted on the sand cleaning machine 19 adopted on hot well 1, and the sand cleaning machine 19 passes through pipeline
It is connected with first-class heat exchanger 10 and secondary heat exchanger 9, the first-class heat exchanger 10 is connected with water tank 11 by pipeline, and described one
Grade heat exchanger 10 is connected with inverted well 2 by pipeline, is provided with primary user 12 on the heat exchanging water pipe of the secondary heat exchanger 9,
The secondary heat exchanger 9 is connected with three-level heat exchanger 18 by pipeline, and it is direct that first-class heat exchanger 10 will adopt the GEOTHERMAL WATER in hot well 1
Extraction, by sand cleaning machine 19 and corresponding filter device, is applied directly in domestic water, and can be carried out by water tank 11
Hot water after heat exchange is supplied to primary user 12 by storage, secondary heat exchanger 9, the Low Temperature Thermal after the heat exchange of secondary heat exchanger 9
Water is sent into three-level heat exchanger 18, and by the condenser 15 and the heat-exchanger rig that forms of evaporator 14 on three-level heat exchanger 18, shape
At ground heating air conditioning plant, the refrigeration and heating needs of secondary user are realized.
And evaporator 14 is connected on the pipeline of the three-level heat exchanger 18, the evaporator 14 is realized by pipeline and is condensed
The heat exchange of device 15, and secondary user 16 is set on the pipeline of condenser 15, connected on the pipeline of the condenser 15 by pipeline
It is connected to triple valve 17, and three-level heat exchanger 18 is arranged in for the triple valve 17 and first-class heat exchanger 10 connects the pipeline of inverted well 2
On, first-class heat exchanger 10 and secondary heat exchanger 9 carry out consumption part hot water by water supply tank 13 and supplement, and the two of three-level heat exchanger 15
The supplement that grade user 16 consumes water can be provided, thus indirectly by three-way magnetic valve from the heat exchange waste water of three-level heat exchanger 15
Using first-class heat exchanger 10 thermal wastewater supply, to realize the effective use of water resource.
The surface layer 21 of shutting off includes the guide pipe 3 that shuts off, and the filled layer 5 at the top of the guide pipe 3 that shuts off, described to shut off
Guide pipe 3 includes arc column chamber 301, and the arc column chamber 301 is by preceding hole face 303 and the rear real connection of face 302 formation, and it is described before
Hole face 303 and adopt that hot well 1 is opposite, the recharge water flowed into from second level fluid layer 4 has by preceding hole face 303 inflow arc column chamber 302
The preceding hole face 303 of 302 bottom of arc column chamber carries out the reflux of bottom, and then real face 301 then stops the recharge water of second level fluid layer 4 to continue
Lateral flow.
Double pressure pipes 8 include forcing pipe A111 and forcing pipe B105, and the forcing pipe A111 and forcing pipe B105 it
Between be provided with solenoid valve 106, the forcing pipe A111, which longitudinally runs through sealant A109 and extends to, to stream inside chamber 112, it is described plus
Pressure pipe B105 passes through sealant B108 and extends to inside back cavity 113, and double pressure pipes 8 are connected with pressurization pump group 7, and the increasing
Press pump group 7 is provided with the pipeline extended into inside reflux chamber 206 simultaneously, and in the initial state, forcing pipe B105 passes through solenoid valve
106 control is in close state, and when the long-time running for adopting hot well, back cavity 113 can inevitably accumulate stone and gravel, from
And influence to adopt the water state of adopting of hot well 1, and forcing pipe B115 is periodically started by solenoid valve 106, it is reversed to being carried out in back cavity 113
It rinses, and building up inside sandstone is removed by inner layer sleeve 101 and sand cleaning machine 19.
A kind of high efficiency of energy based on geothermal exploitation well utilizes recovery method, includes the following steps:
Step 100 adopt using conventional drilling equipment driving a well for hot well and inverted well, carries out two and open to mention adopting hot well
When brill, drilling well enlarged-diameter to the nozzle for connecing flow tube to the linear distance between the nozzle of flat fire pipe, is drilled by more bit change
Layer hot dry rock after mentioning brill, replaces initial diameter drill bit, until hot dry rock middle layer, mention after brill replacement to and inner layer sleeve aperture phase
Same drill bit, until hot dry rock middle layer bottom, to reach the water intaking layer of GEOTHERMAL WATER, and with installation well head and blowout control equipment；
When driving a well of inverted well is carried out, the exploitation of inverted well is carried out by drilling equipment, two replace when opening to first jet pipe
The drill bit of add-back well outer tube diametral distance after mentioning brill, more gains the drill bit of well housing pipe diameter, while eccentric well is until warm
The middle layer Gan Yan；
Step 200, installation perforating apparatus, the two aperture well side walls for carrying out flat fire pipe respectively, connecing flow tube and first jet pipe
Perforation, and by Perforation head spaced set, and go deep into two and open diameter bottom of the tube, it is lighted a fire using ground, ignites perforating bullet, it is laggard
The outer layer sleeve installation for being provided with influent stream face of row hot dry rock bottom, when installation is to two aperture diameter sections, by outer layer sleeve and wellbore
Between sealed by cement slurry and cement sheath, until earth's surface, by the guidance explosion of perforating apparatus, on the top of hot dry rock reservoir
Divide and carry out pressure break, the fracture network being efficiently connected to is formed, so that recharge thermal wastewater can be good at circulating；
Step 300, the installation for adopt hot well inner layer sleeve and outer layer sleeve, adopt after hot well is installed and install inverted well
Return well outer tube and return well inner sleeve installation casting, after outer layer sleeve well cementation installation after, outer layer inside pipe casing install band
There is aperture layer casing inner layer sleeve, in installation to two aperture diameter section, the sealing of top layer carried out by cement sheath, forms sealant B,
At installation to hot dry rock upper layer bottom, sealant A is formed by cement sheath；
Step 400, after the completion of adopting hot well and inverted well, on adopting hot well and inverted well connect multi-stage user system,
Double pressure pipes are added when adopting sealant A and the sealing B forming of hot well, and solenoid valve is arranged in sealant B, carry out battery valve
Waterproof and line layout, while pressurization pump group being installed；
Step 500 adopt flat fire pipe formation second level fluid layer detection on the left of hot well, by between adopting hot well left radial etc.
It is punched away from depth, hole is deep to bottom of chamber portion of streaming, and by soil water detection device and temperature-detecting device to water in hot dry rock
It is detected with temperature, so that it is determined that maximum transversal fluid layer and temperature that the recharge water streamed in chamber is reached by flat fire pipe divide
Cloth；
The equipment installation of step 600, the surface layer that shut off, in lateral water content drop larger part, gets arcuate socket well, and
Shut off surface layer in Kong Jingzhong installation, after installing and shutting off surface layer, shut off the backfill and compacting of surface layer by filled layer.
It should be added that driving a well for inverted well is carried out after adopting hot well and completing outer layer sleeve, and in outer layer jacket
101 outer wall of pipe forms after outer circle 114 admittedly the perforation explosion for carrying out just jet pipe 205 by cement slurry, can connect flow tube 110
The fracture network carried out again in level-one fluid layer 6 is formed after perforation explosion, so that the fracture network connectivity in rock stratum is more preferable,
It is more careful, it is not easy to which that formation collapses.
Wherein in installation perforating apparatus, the perforation angle for connecing flow tube 110 positioned at 104 right side of outer layer sleeve is 45 °, is put down
Penetrating pipe 107 and first jet pipe 205 is horizontal perforation, passes through the gravity for connecing flow tube 110 and making full use of level-one fluid layer 6 of 45° angle degree
Potential energy difference, formation is good to connect flow angle, more to carry out shutting off for recharge thermal wastewater.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (9)
1. a kind of high efficiency of energy based on geothermal exploitation well utilizes winning apparatus, including adopts hot well (1), inverted well (2) and adopting
Surface layer of shutting off (21) on the left of hot well (1), and it is connected to the multi-stage user system adopted between hot well (1) and inverted well (2)
(20), it is characterised in that: the hot well (1) of adopting includes inner layer sleeve (101) and outer layer sleeve (104), the outer layer sleeve
(104) be provided with sealant A (109) and sealant B (108) between inner layer sleeve (101), and the sealant A (109) and
It is formed and is streamed chamber (112) between sealant B (108), the chamber (112) that streams is if spaced set has stem grafting respectively on two sidewalls
The inner layer sleeve (101) of flow tube (110) and flat fire pipe (107), sealant B (108) bottom forms back cavity (113), institute
It states back cavity (113) left side wall to be provided with influent stream face (103), the inner layer sleeve (101) is located at the internal pipe of back cavity (113)
Body is provided with aperture layer casing (102), and double pressure pipes are vertically arranged between the inner layer sleeve (101) and outer layer sleeve (104)
(8)；
The inverted well (2) include back well outer tube (201) and return well inner sleeve (202), and described time well outer tube (201) and
Forming layer reflux chamber (206) between well inner sleeve (202) is returned, is provided with sealant C (204) at the top of the layer reflux chamber (206),
Described time well inner sleeve (202) bottom is provided with through-hole foundation ring (203), and be located at sealant C (204) bottom returns casing
(202) just jet pipe (205) is provided on left side wall.
2. a kind of high efficiency of energy based on geothermal exploitation well according to claim 1 utilizes winning apparatus, it is characterised in that:
The multi-stage user system (20) includes being mounted on the sand cleaning machine (19) adopted on hot well (1), and the sand cleaning machine (19) passes through pipeline
It is connected with first-class heat exchanger (10) and secondary heat exchanger (9), the first-class heat exchanger (10) is connected with water tank by pipeline
(11), the first-class heat exchanger (10) is connected with inverted well (2) by pipeline, on the heat exchanging water pipe of the secondary heat exchanger (9)
It is provided with primary user (12), the secondary heat exchanger (9) is connected with three-level heat exchanger (18) by pipeline, and the three-level is changed
It being connected with evaporator (14) on the pipeline of hot device (18), the evaporator (14) realizes the heat exchange of condenser (15) by pipeline,
And secondary user (16) are set on the pipeline of condenser (15), three are connected with by pipeline on the pipeline of the condenser (15)
Port valve (17), and the triple valve (17) setting connects inverted well (2) in three-level heat exchanger (18) and first-class heat exchanger (10)
On pipeline.
3. a kind of high efficiency of energy based on geothermal exploitation well according to claim 1 utilizes winning apparatus, it is characterised in that:
The surface layer of shutting off (21) includes shutting off guide pipe (3), and the filled layer (5) at the top of the guide pipe that shuts off (3) is described to shut off
Guide pipe (3) includes arc column chamber (301), and the arc column chamber (301) connects shape by preceding hole face (303) face He Houshi (302)
At, and the preceding hole face (303) and to adopt hot well (1) opposite.
4. a kind of high efficiency of energy based on geothermal exploitation well according to claim 1 utilizes winning apparatus, it is characterised in that:
The sealant A (109) and sealant B (108) are separately positioned at 1/3 pipe shaft and 2/3 pipe shaft of inner layer sleeve (101), institute
Sealant C (204) setting is stated at 1/4 pipe shaft for going back to well inner sleeve (202)；Flow tube is connect on the right side of outer layer sleeve (104)
(110) perforation angle is 45 °, and flat fire pipe (107) and first jet pipe (205) are horizontal perforation.
5. a kind of high efficiency of energy based on geothermal exploitation well according to claim 1 utilizes winning apparatus, it is characterised in that:
Double pressure pipes (8) include forcing pipe A (111) and forcing pipe B (105), and the forcing pipe A (111) and forcing pipe B (105)
Between be provided with solenoid valve (106), the forcing pipe A (111), which longitudinally extends to through sealant A (109), streams in chamber (112)
Portion, the forcing pipe B (105) pass through sealant B (108) and extend to back cavity (113) inside, and double pressure pipes (8) are connected with
It is pressurized pump group (7), and pressurization pump group (7) is provided with extends into the internal pipeline of reflux chamber (206) simultaneously.
6. a kind of high efficiency of energy based on geothermal exploitation well utilizes recovery method, characterized by the following steps:
Step 100 adopt using conventional drilling equipment driving a well for hot well and inverted well；
Step 200, installation perforating apparatus, carry out the perforation of flat fire pipe, the two aperture well side walls for connecing flow tube and first jet pipe respectively；
Step 300, the installation for adopt hot well inner layer sleeve and outer layer sleeve adopt and install returning for inverted well after hot well is installed
Well outer tube and the installation casting for returning well inner sleeve；
Step 400, after the completion of adopting hot well and inverted well, on adopting hot well and inverted well connect multi-stage user system；
Step 500 adopt flat fire pipe formation second level fluid layer detection on the left of hot well；
The setting installation of step 600, the surface layer that shut off；
Wherein, the step 300 further include: after outer layer sleeve well cementation installation, have aperture layer set in the installation of outer layer inside pipe casing
Inner tube layer casing carries out the sealing of top layer by cement sheath in installation to two aperture diameter section, forms sealant B, is installing extremely
When the bottom of hot dry rock upper layer, sealant A is formed by cement sheath.
7. a kind of high efficiency of energy based on geothermal exploitation well according to claim 6 utilizes recovery method, it is characterised in that:
The step 100 further include: when two open and mention brill, more bit change is by drilling well enlarged-diameter to connecing the nozzle of flow tube to flat fire pipe
Linear distance between nozzle is drilled into upper layer hot dry rock, after mentioning brill, replaces initial diameter drill bit, until hot dry rock middle layer, mentions brill
Afterwards replacement to and the identical drill bit in inner layer sleeve aperture, up to hot dry rock middle layer bottom.
8. a kind of high efficiency of energy based on geothermal exploitation well according to claim 6 utilizes recovery method, it is characterised in that:
By Perforation head spaced set in the step 200, and go deep into two and open diameter bottom of the tube, lighted a fire using ground, ignites perforation
Bullet, the rear outer layer sleeve installation for being provided with influent stream face for carrying out hot dry rock bottom, when installation to two aperture diameter section, by outer layer sleeve
It is sealed between wellbore by cement slurry and cement sheath, until earth's surface.
9. a kind of high efficiency of energy based on geothermal exploitation well according to claim 6 utilizes recovery method, it is characterised in that:
The step 400 further include: after the outer layer sleeve of heating well is installed, the exploitation of inverted well is carried out by drilling equipment,
Two replace when opening to the drill bit of first jet pipe add-back well outer tube diametral distance, after mentioning brill, more gain the brill of well housing pipe diameter
Head, while eccentric well is until hot dry rock middle layer.
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| CN106839478A (en) * | 2017-01-23 | 2017-06-13 | 西安浩沃新能源有限公司 | A kind of method of construction of deep geothermal heat heat transfer root system |
| CN106968661A (en) * | 2017-03-06 | 2017-07-21 | 中国石油集团钻井工程技术研究院 | It is a kind of to strengthen the completion method of hot water type geothermal system |
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