CN104040270A - Orienting and supporting a casing of a coaxial geothermal borehole - Google Patents
Orienting and supporting a casing of a coaxial geothermal borehole Download PDFInfo
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- CN104040270A CN104040270A CN201280066859.1A CN201280066859A CN104040270A CN 104040270 A CN104040270 A CN 104040270A CN 201280066859 A CN201280066859 A CN 201280066859A CN 104040270 A CN104040270 A CN 104040270A
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- 238000000034 method Methods 0.000 claims description 52
- 238000009434 installation Methods 0.000 claims description 39
- 230000006698 induction Effects 0.000 claims description 12
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- 230000000295 complement effect Effects 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims 4
- 238000013461 design Methods 0.000 description 11
- 238000005553 drilling Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 9
- 239000004567 concrete Substances 0.000 description 7
- 238000007689 inspection Methods 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- 238000005057 refrigeration Methods 0.000 description 2
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- 239000011435 rock Substances 0.000 description 2
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Classifications
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- 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
- E21B7/04—Directional drilling
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- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/24—Guiding or centralising devices for drilling rods or pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T2010/50—Component parts, details or accessories
- F24T2010/53—Methods for installation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A casing support of a geothermal borehole heat exchanger having an outer casing, the casing support comprising a base support element incorporating an aperture therethrough, the base support element being arranged to be supported by a ground surface around a borehole, an annular orientation guide element at an upper surface of the base support element and having a central conduit communicating with the aperture, the orientation guide element having an upper surface at a selected angle relative to a lower support surface of the base support element, and a casing support ring fitted around an outer casing of a geothermal borehole heat exchanger, the casing support ring being coupled to the orientation guide element to support the casing in the borehole, the outer casing extending through the ring, the conduit and the aperture.
Description
Technical field
The present invention relates to a kind of collar supports part and the method with the sleeve pipe of the heat exchanger of thermic boring coaxially of support geothermal energy system for orientation.Described method also relates to the installation method of geothermal borehole heat exchanger and geothermal borehole heat exchanger.
Background technology
More than one, since century, geothermal energy is used for generating and direct heating by exploitation in a variety of forms in the whole world.Conventionally, these equipment be placed in high enthalpy source rock relatively near or be positioned at the colcanism region at earth surface place, for example US West, Iceland or Philippine.Seldom known but more and more importantly, in recent decades, by the application of for example cryogenic turbo formula generator and by by earth source heat pump (GSHP) for heating, refrigeration and accumulation of heat, low enthalpy geothermal energy resources have obtained exploitation.
Related general principle is to utilize the stable heat condition existing in the stratum below approximately 10 meters at subsurface.This stability comes from the quality of the earth and is derived from the Geothermal heat flux of the melting earth's core of the earth.It is reproducible, inexhaustible that this heat flux is actually, and this is because the melting earth's core of the earth is maintained by nuclear decay.Under controlled condition, by means of the insertion pipe heat exchanger underground and that be connected with ground heat pump that utilizes working fluid as heat transmission medium (single-lift or reversible structure), a large amount of heat energy can be supplied, absorbs or be stored in stratum.
Be known that by one or more boring heat exchangers (BHE) are installed and extract cryogenically heat energy and warm oneself for building, described each boring heat exchanger is all installed in underground and combines with heat pump (HP).This system applies the reversible kind of refrigeration cycle of working between the inner space of underground and building.In closed circuit or open circuit, use the various special layout of working fluid known.Such system and method is known and is known as " earth source heat pump (GSHP) " technology in the art.
The vertical BHE that use is called as " coaxially " or " with one heart " structure is known.In its citation form, this is that a kind of tube-in-tube is arranged, comprise: for coming into line and support the external cylindrical sleeve pipe of the wall of a borehole, the coupling pipe of small diameter is installed in sleeve pipe, this coupling pipe be outstanding connect so that its openend is positioned at the short distance of foot of hole top.
(although not such was the case with) ideally, inner tube is positioned at the central authorities in the hole of outer sleeve, is beneficial to hot-fluid in BHE and the optimization of flow of pressurized.Then, by inner tube, flow downward and annular section between inner tube and outer sleeve in on the water circulation that refluxes or contrary water circulation (according to design requirement) form closed loop.Heat passes through conduction and transmits to the current in described annular section, and efficiency is provided by the larger effective contact area between water and the stratum being provided by outer sleeve, makes hydraulics optimization.
Up to the present, coaxial configuration is not also accepted extensively by GSHP industry.Its reason comprises higher cost of investment and designs more complicated design with respect to U-shaped pipe.In history, the coaxial equipment of limited quantity is completed by oil, natural gas and well probing contractor completely, and these people do not understand GSHP market, and the price mechanism of these equipment is improper and lack innovation.
Therefore the research and development of, in the past under the support of GSHP industry, coaxial system being carried out are relatively less.But, pursue higher BHE efficiency with the promotion matching with the requirement of large capacity GSHP equipment under, this situation changes at present.Therefore, the intrinsic advantage of coaxial design just little by little obtains more attention.To a certain extent, considerable research institution also promotes it and enters heat-storage on a large scale application, and due to identical, coaxial design is also favourable in heat-storage application on a large scale.Up to the present, in general, vertical BHE be comprise tens or the form of a hundreds of large-scale array of holing be applied to main equipment, these borings normally adopt conventional well drilling equipment to be drilled into the degree of depth of 50-200 rice and utilize U-shaped pipe to complete.
Because needs keep the minimum interval between boring, to avoid heat to disturb, so the floor area needing may be sizable.For above-mentioned reasons, the operation of this design and the whole efficiency of drilling well are low.
, there is the design of a lot of BHE in the past 25 years.Most of closed circuit GSHP equipment has adopted two kinds of main practical design of vertical BHE: the first is so-called U-shaped pipe (the normally loop of flexible plastic pipe), and the second is coaxial (tube-in-tube) design.It is known that coaxial design has the more geometry of high thermal efficiency, but owing to needing jumbo in installation process thereby being unpractical for most of setters.But commercial scale project can be supported coaxial design.Two types of these of BHE are all filled with working fluid, normally contain the water of antifreezing agent.
BHE equipment is provided with ground gathering system, for collecting heat energy from large amount of building or distributing heat energy to these buildings.Such ground gathering system outside total vertical tube length, may comprise for ground level heat transmittance process up to 100% extra tube length.Extra surface duct like this causes lasting working loss, such as heat energy and pressure loss.This just need to be used for making up the additional electrical energy of working loss and for the construction of extra ground gathering system and maintenance and the cost increasing conversely.For a long time, this becomes the limiting factor of large-scale GSHP equipment.
See figures.1.and.2, show the sectional view of the known installation of thermic boring heat exchanger (BHE) coaxially.Fig. 1 shows the assembling in installation period, and Fig. 2 shows BHE and the well head after installation.Fig. 1 has the BHE orientation of inclination, and Fig. 2 has vertical BHE orientation.Before drillng operation starts, conventionally in the inspection shaft chamber 4 being preset in ground 2 and under ground level, one or more BHE are installed.Well chamber 4 comprises cast concrete base 6 and from the upwardly extending sidewall 8 of cast concrete base 6.Sidewall 8 can comprise pipe of concrete cubic block and can comprise as shown in figure the inside access step 24 within well chamber 4.Boring heat exchanger is installed into select angle through cast concrete base 6.
Between the installation period of thermic boring heat exchanger (BHE) coaxially, standing procedure is: by the temporary table surface cover pipe 12 that is not cemented in appropriate position in substrate 6 is set in the mode that extends through the hole 10 in substrate 6, can isolate unsettled surperficial rock stratum and then can make the boring of main borehole proceed.This temporary casing 12 be designed to into recyclable and recycling to reduce costs or can be left on suitable position according to reclaiming time that be spent and the length of use.The length of temporary casing 12 is conventionally between 5 meters and 30 meters, although it can be longer or shorter.Thermic boring heat exchanger (BHE) 14 extends downward the bottom of the boring being got out by temporary casing 12 coaxially.
As shown in Figure 2, in main borehole portion after the drilled bottom that passes to boring, temporary casing 12 is removed and around the bottom of the permanent pipe casing 12 through borings that got out of coaxial BHE14 and by the bottom support of holing.
As shown in Figure 2, after installation, each BHE14 is connected to well head 16 in the top.Well head 16 has the accessory for being connected to pipeline or fluid flow line 22, and pipeline or fluid flow line 22 are connected to the heat exchanger (not shown) of geothermal energy system.The lid 20 that well chamber 4 is positioned at its upper end in sidewall 8 tops seals.Lid 20 can have the centre bore that the length for allowing during installation BHE18 is passed down through.
Outside permanent pipe casing 12 is arranged on to foot of hole efficiency low and may expire well drilling detritus and other solid of after drillng operation finishes, being suspended in drilling fluid and cause BHE length inconsistent because filling.In order to adapt to such length variations, due to the uncertain length of available boring, a large amount of extra lengths of superfluous boring are got out and the sleeve pipe 12 of a large amount of shorter length is used to make sleeve pipe to drop on the bottom of boring.
Due to the cost of the time that makes sleeve pipe fall to spending and shorter outer sleeve length, known installation process has increased installation cost.In addition, known installation process is not got rid of such result: the BHE (the length difference of the different BHE in same geothermal system) of different length may be installed, and this has caused mobile in each BHE of the heat-exchange fluid being caused by the pressure loss of the variation in each BHE is conversely different.The liquid stream that mobile difference in each BHE can cause the inconsistent of BHE performance and only can flow to each BHE by restraining is individually eliminated to the liquid stream of each BHE with equiulbrium flow.This had both increased set-up time cost and had also increased erection unit cost.
The inconsistent set depth of sleeve pipe 12 also means the differing heights that each well head 16 may be in well chamber 4.This has caused such problem: each connection that is connected to boring streamline 22 will be different, need on-site customization.
The present invention is intended to overcome at least in part the known installation of thermic boring heat exchanger coaxially and these problems of sleeve structure.
Summary of the invention
The invention provides the geothermal borehole heat exchanger of a kind of sleeve supports support in boring, described collar supports part is assembled in the surrounding of outer sleeve of geothermal borehole heat exchanger and the described collar supports part boring heat exchanger in hanging from described collar supports part to the boring of downward-extension, and described collar supports part limits the predetermined angular of the upper end of the described boring heat exchanger in described boring.
The present invention also provides a kind of well chamber, and described well chamber comprises that, according to multiple geothermal borehole heat exchangers of the present invention, each collar supports part has the boring heat exchanger from this collar supports part to downward-extension in orientation separately.
The present invention also provides a kind of installation method of geothermal borehole heat exchanger, said method comprising the steps of:
(a) the first sleeve pipe support member portion is set, described the first sleeve pipe support member portion is limited the predetermined bore angle of boring by ground supports and described the first sleeve pipe support member portion;
(b) hole by described the first sleeve pipe support member portion, described the first sleeve pipe support member portion defines the predetermined angular of the upper end of described boring; And
(c) hang on described the first sleeve pipe support member portion from described the first sleeve pipe support member portion to the described boring heat exchanger in the boring of downward-extension, described the first sleeve pipe support member portion limits the predetermined angular of the upper end of the described boring heat exchanger in described boring.
The present invention also provides a kind of collar supports part of the geothermal borehole heat exchanger with outer sleeve, described collar supports part comprises: the substrate support element that contains aperture, described substrate support element is run through in described aperture, and described substrate support element is arranged to by boring ground supports around; Annular orientation induction element, described annular orientation induction element is positioned at the upper surface of described substrate support element and has the center conduit being communicated with described aperture, and the upper surface of described directional guide element becomes selected angle with respect to the lower support surface of described substrate support element; With collar supports ring, the outer sleeve that described collar supports ring is assembled in geothermal borehole heat exchanger around, described collar supports ring is connected to described directional guide element to support the sleeve pipe in described boring, and described outer sleeve extends through described collar supports ring, described center conduit and described aperture.
The invention allows for a kind of well chamber, described well chamber comprises that, according to multiple collar supports parts of the present invention, each collar supports part has the boring heat exchanger from this collar supports part to downward-extension in orientation separately.
The installation method that the invention allows for a kind of collar supports part of the geothermal borehole heat exchanger with outer sleeve, said method comprising the steps of:
(a) the substrate support element that contains aperture is set, described substrate support element is run through in described aperture, and described substrate support element is by ground supports; And annular orientation induction element, described annular orientation induction element is positioned at the upper surface of described substrate support element and has the center conduit being communicated with described aperture, and the upper surface of described directional guide element becomes selected angle with respect to the lower support surface of described substrate support element; And
(b) to be holed by described center conduit and described aperture by the default orientation of described directional guide element.
Define in the dependent claims the preferred feature of all these aspects of the present invention.
The preferred embodiments of the present invention can provide that modular system is to make it possible to from upper surface cheaply, and especially well chamber surface supports the outer sleeve of coaxial underground heat BHE.Coaxial underground heat BHE can hang especially and connect or hang on the bottom borehole wall of well chamber instead of supported by the bottom of holing.
The preferred embodiments of the present invention can also provide: the bottom of boring well chamber can be sealed.
The preferred embodiments of the present invention can also provide: orientation and the gradient of boring are scheduled to, the possibility of this human error in can eliminating during the foundation of drilling process.
The modular system of the preferred embodiments of the present invention can also make to manufacture and installation becomes easily, because can be by same group of assembly for various drilling depths and/or gradient.
In a preferred embodiment of the invention, by the multiple BHE in elimination single entry geothermal system (selectively, in chamber, there are multiple BHE in single well) this problem of height change of upper end, can make all connector standardization between well head and streamline and can manufacture these connectors outward at erecting yard, reducing set-up time and installation cost.
Brief description of the drawings
Only by way of example embodiments of the invention are described referring now to accompanying drawing, wherein:
Fig. 1 illustrates in installation period the schematic sectional view of the known installation of thermic boring heat exchanger (BHE) coaxially;
Fig. 2 is the schematic sectional view that the installation of well head Fig. 1 is afterwards installed;
Fig. 3 is the schematic sectional view of the installation of the interior heat exchanger of thermic boring coaxially (BHE) during installation illustrating according to first embodiment of the invention;
Fig. 4 is the schematic sectional view of the installation of the interior heat exchanger of thermic boring coaxially (BHE) during installation illustrating according to second embodiment of the invention;
Fig. 5 is the schematic exploded sectional view of the well chamber component of the installation of Fig. 1 and Fig. 2;
Fig. 6 is the schematic sectional view of the orientation guide of the installation of Fig. 1;
Fig. 7 is the schematic sectional view of the orientation guide of the installation of Fig. 2;
Fig. 8 is the schematic sectional view that illustrates the modification structures of the installation shown in Fig. 3 after well head is installed;
Fig. 9 is the schematic sectional view that illustrates the modification structures of the installation shown in Fig. 4 after well head is installed;
Figure 10 is the schematic sectional view that illustrates the installation of the Fig. 4 in the installation period of orientation guide; And
Figure 11 is the schematic sectional view that contains in accordance with another embodiment of the present invention the alternative substrate support element of multiple integrated orientation guides.
Detailed description of the invention
Fig. 3 and Fig. 4 schematically show the installation system of the boring heat exchanger of the geothermal energy system of the first and second embodiment according to the present invention.Fig. 3 and Fig. 4 show the assembling in installation period.The embodiment that the embodiment of Fig. 3 has vertical BHE orientation and Fig. 4 has the BHE orientation of inclination.In each embodiment, before drillng operation starts, in the inspection shaft chamber being preset in the (not shown) of ground and under ground level, BHE is installed.Described well chamber comprises the substrate support element 30 of flat type.Substrate support element 30 is made up of pre-cast concrete conventionally.Substrate support element 30 has the aperture 36 of therefrom running through extension.Substrate support element 30 has the standard size for all dip angle of hole.Armored concrete or other material can support the nearly weight of 15 tons hanging by aperture 36.
Sidewall 32 upwards extends from substrate support element 30.Sidewall 32 can comprise stacking concrete cube and can comprise as shown in figure the inside access step that well is indoor.The lid 34 with the opening 35 of coming in and going out is positioned on sidewall 32.In Fig. 5, show lid 34, sidewall 32 and substrate support element 30 with decomposed form.
As mentioned below, boring heat exchanger is installed to be to select angle by substrate support element 30.
In addition,, with reference to corresponding with the embodiment of Fig. 3 and Fig. 4 respectively Fig. 6 and Fig. 7, annular orientation induction element 38,58 is mounted to the upper surface 40 of substrate support element 30.
In the embodiment illustrating at Fig. 1 to Figure 10, directional guide element 38,58 and substrate support element 30 be separate but be assembled to substrate support element 30.Generally speaking, directional guide element 38,58 is positioned at the upper surface 40 of substrate support element 30, and in alternate embodiment, substrate support element 30 and directional guide element the 38, the 58th, the integrated substrate support element 30 for example being formed by the monomer of pre-cast concrete and directional guide element 38,58.This monomer can comprise multiple directional guides unit, and these directional guide unit are positioned at position separately and have inclination angle separately with respect to vertical direction.In the case of such integrated arrangement, arrange or be positioned at the substrate support element 30 of bottom, inspection shaft chamber and also just arrange or installed integrated directional guide element 38,58 at upper surface 40 places of substrate support element 30 simultaneously.Figure 11 shows such structure: substrate support element 130 and integrated directional guide element the 138, the 158th, the monomer of for example pre-cast concrete.Although two integrated directional guide elements are set to monomer, any amount of integrated directional guide element can exist and form together with substrate support element, and any orientation or directed combination can be provided.
Directional guide element 38,58 has center conduit 52,60, and center conduit 52,60 is connected with aperture 36.Directional guide element 38,58 has upper surface 39,59, and upper surface 39,59 is with respect to the lower support surface 37 of substrate support element 30,57 one-tenth selected angles.Substrate support element 30 and directional guide element 38,58 are provided with interlocking member 48,50, and interlocking member 48,50 cooperatively interacts that directional guide element 38,58 is positioned to the default turned position about the longitudinal axis in aperture 36 with respect to substrate support element 30 together.Conventionally, interlocking member 48,50 comprises open component and female element.Interlocking member 48,50 guarantees that substrate support element 30 aligns with the anti-failure safe between directional guide element 38,58.
The upper surface 39,59 of directional guide element 38,58 is parallel with the lower surface 41,61 of directional guide element 38,58 or favour at a certain angle the lower surface 41,61 of directional guide element 38,58.In the embodiment of Fig. 3 and Fig. 6, the upper and lower surface of directional guide element 38 is parallel and in the embodiment of Fig. 4 and Fig. 7, the upper and lower surface of directional guide element 58 tilts mutually taking acute angle (in an embodiment as 15 degree).The upper and lower surface of directional guide element 58 can tilt with the angle of any expectation from 5 to 45 degree conventionally mutually.
Directional guide element 38,58 is formed and is had the dip angle of hole of the selection of standard conventionally by pre-cast concrete, for example 0,5,10 or 15 degree.Armored concrete or other material can support the nearly weight of 15 tons hanging by aperture 36.
Collar supports ring 54 be assemblied in geothermal borehole heat exchanger outer sleeve 46 upper end 44 around.Collar supports ring 54 is connected to directional guide element 38,58 to support the sleeve pipe 46 in boring.Outer sleeve 46 extends through support ring 54, conduit 52,60 and aperture 36.Collar supports ring 54 has the inner annular surface coordinating with the outside cylindrical surface of the upper end 44 of outer sleeve 46.Conventionally the outside cylindrical surface threaded engagement of the upper end 44 of the inner annular surface of collar supports ring 54 and outer sleeve 46.
Such assembling is oriented in outer sleeve 46 in the vertical or non-perpendicular direction of expectation, as shown in axis B and axis C in Fig. 3 and Fig. 4.Well chamber has vertical axis A.
In the embodiment of Fig. 3 and Fig. 4, as Figure 10 at length as shown in, collar supports ring 54 comprises the inner member 68 around of upper end 72 that is installed in coaxial boring heat exchanger 80 and is installed in outside on directional guide element 58 guiding piece 62 that rises and falls.Figure 10 shows the layout in installation period.After installation, inner member 68 is assembled in outside and rises and falls in guiding piece 62.The inside of the outside of inner member 68 and the guiding piece 62 that rises and falls has complementary conical gradual change matching surface 70,64 so that inner member 68 can be installed in the conduit 66 of the guiding piece 62 that rises and falls downwards.
Boring surface sleeve pipe 42 is round the top of the outer sleeve 46 of the boring heat exchanger in boring and be assembled to collar supports ring 54, and especially, guiding piece 62 rises and falls in the outside that is assembled to collar supports ring 54.Conventionally, boring surface sleeve pipe 42 by Screw assembly the inner annular surface to the flange 75 to downward-extension of the guiding piece 62 that rises and falls.
In the installation method of collar supports part of geothermal borehole heat exchanger with outer sleeve 46, first, the substrate support element 30 that setting contains the aperture 36 of running through, to make substrate support element 30 by ground supports, is preferably being arranged in underground well chamber by ground supports.Annular orientation induction element 38,58 is mounted on the upper surface of substrate support element 30, and directional guide element 38,58 has the center conduit 52,60 being communicated with aperture 36.The upper surface of directional guide element 38,58 becomes selected angle with respect to the lower support surface of substrate support element 30.Mounting sleeve support ring 54 is so that it is connected to directional guide element 38,58.Assembling boring surface sleeve pipe 42 is so that its top around boring and boring surface sleeve pipe 42 is assembled to collar supports ring 54.To be holed by center conduit 52,60 and aperture 36 by the default direction of directional guide element 38,58.After boring, boring heat exchanger is assembled in boring, and collar supports ring 54 be assemblied in geothermal borehole heat exchanger outer sleeve 46 surrounding and support the outer sleeve 46 in boring, outer sleeve extends through ring 54, conduit 52,60 and aperture 36.
With further reference to the detail drawing of Figure 10, in the embodiment of Fig. 3 and Fig. 4, if do not reclaim surperficial sleeve pipe 42 after installing, so collar supports ring 54 is arranged on to the top of surperficial sleeve pipe 42.Surface sleeve pipe 42 is that the drilling well catheter length of the surperficial sleeve pipe that exists between operational period in drilling well and grouting is to be transferred to surface treatment by drilling fluid and drilling well bits.
The upper end 72 of coaxial boring heat exchanger 80 can comprise the extra short circuit head of sleeve pipe, and normal length is 50cm, for operation and the outside inner member 68 rising and falling in guiding piece 62 of installation.Then well head 60 is attached to this short circuit head of sleeve pipe.
Inner member 68 weight transmitting of the outer sleeve of bunchiness 46 is risen and fallen to outside guiding piece 62, and and then be passed to directional guide element 38,58, be then passed to the substrate support element 30 as the final load-carrying support member of the outer sleeve 46 of BHE.
With reference to the alternate embodiment shown in Fig. 8 and Fig. 9 (they are respectively the modified examples of Fig. 3 and Fig. 4), boring surface sleeve pipe 42 can be only provisional and only interior in above-mentioned position during installation, and is removed after installing.In this case, collar supports ring 54 comprises the guiding piece 62 that rises and falls, and the guiding piece 62 that rises and falls is directly assembled to the top 44 of the outer sleeve 46 of (for example, be threaded connection and be directly assembled to) boring heat exchanger.In these embodiments, surperficial sleeve pipe 42 will be recovered.Collar supports ring 54 is mounted directly to outer sleeve 46.Collar supports ring 54 has the second ring screw coordinating for the first ring screw of temporary supporting boring surface sleeve pipe 42 with outer sleeve 46.Collar supports ring 54 be placed on directional guide element 38,58 and by the weight transmitting of outer sleeve 46 to directional guide element 38,58, and then be passed to the substrate support element 30 as the final load-carrying support member of the outer sleeve 46 of BHE.
Boring heat exchanger 46 extends downward the degree of depth that is greater than 100 meters, selectively, and from the degree of depth of 100 meters to 200 meters.After installation, well head 60 is assembled to the upper end of boring heat exchanger 46 and is connected to the streamline 56 of geothermal system.Each collar supports part has the boring heat exchanger 46 from this collar supports part to downward-extension in orientation separately.In the geothermal system of multiple boring heat exchangers 46, the orientation of at least some boring heat exchangers 46 is different, and each orientation is to arrange by the corresponding selection orientation of each directional guide element 38,58.In the time that multiple BHE are installed in the same inspection shaft chamber being preset in ground, these BHE can have different orientations.In single well chamber, use multiple boring reduced to hole surface area on required ground.
In the time that directional guide element 38,58 in any one embodiment and collar supports ring 54 are installed, seal the contact area between contact area and collar supports ring 54 and the directional guide element 38,58 between directional guide element 38,58 and substrate support element 30 with sealant.This guarantees that going up from boring the surface water coming can not enter well chamber, thereby protection well head and the connection being associated, streamline can not be corroded.
Other amendment to various embodiment of the present invention will be apparent to those skilled in the art.
Claims (69)
1. a geothermal borehole heat exchanger, its sleeve supports support is in boring, the outer sleeve that described collar supports part is assembled in described geothermal borehole heat exchanger around, and the described boring heat exchanger of described collar supports part in hanging from described collar supports part to the boring of downward-extension, described collar supports part limits the predetermined angular of the upper end of the described boring heat exchanger in described boring.
2. geothermal borehole heat exchanger according to claim 1, wherein, described collar supports part hangs the total weight of the described boring heat exchanger in described boring.
3. geothermal borehole heat exchanger according to claim 1 and 2, wherein, described collar supports part has the inner annular surface coordinating with the outside cylindrical surface of the upper end of described outer sleeve.
4. geothermal borehole heat exchanger according to claim 3, wherein, the described outside cylindrical surface threaded engagement of the described inner annular surface of described collar supports part and the upper end of described outer sleeve.
5. according to the geothermal borehole heat exchanger described in aforementioned any one claim, wherein, described collar supports part comprises inner member and the outside guiding piece that rises and falls, described inner member is installed in around the upper end of described boring heat exchanger, the described outside guiding piece that rises and falls is installed on the directional guide element that is arranged in well chamber, and described inner member is assembled in described outside and rises and falls in guiding piece.
6. geothermal borehole heat exchanger according to claim 5, wherein, the rise and fall interior tapered matching surface of guiding piece of the outside tapered mating surface of described inner member and described outside is complementary, is risen and fallen in guiding piece so that described inner member can be assembled to described outside downwards.
7. according to the geothermal borehole heat exchanger described in aforementioned any one claim, also comprise: boring surface sleeve pipe, described boring surface sleeve pipe is round the top of the described boring heat exchanger in described boring and be assembled in described collar supports part.
8. the geothermal borehole heat exchanger claimed in claim 7 when quoting claim 5, wherein, described boring surface sleeve pipe is by the rise and fall inner annular surface of guiding piece of Screw assembly to described outside.
9. according to the geothermal borehole heat exchanger described in aforementioned any one claim, wherein, described boring heat exchanger extends downward the degree of depth that is greater than 100 meters.
10. a well chamber, it comprises that, according to the multiple geothermal borehole heat exchangers described in aforementioned any one claim, each collar supports part has the boring heat exchanger from this collar supports part to downward-extension in orientation separately.
Well claimed in claim 10 chamber when 11. bases are quoted claim 5, wherein, the orientation of the heat exchanger of holing described at least some is different, each described orientation is to be arranged by the corresponding selection orientation of each directional guide element.
The installation method of 12. 1 kinds of geothermal borehole heat exchangers, said method comprising the steps of:
(a) the first sleeve pipe support member portion is set, described the first sleeve pipe support member portion is by ground supports and limit the predetermined bore angle of holing;
(b) hole by described the first sleeve pipe support member portion, described the first sleeve pipe support member portion limits the predetermined angular of the upper end of described boring; And
(c) make to hang on described the first sleeve pipe support member portion from described the first sleeve pipe support member portion to the boring heat exchanger within the boring of downward-extension, described the first sleeve pipe support member portion limits the predetermined angular of the upper end of the described boring heat exchanger in described boring.
13. methods according to claim 12, are also included in the following steps between step (b) and step (c):
(d) outer sleeve that the second collar supports part portion is assemblied in to described geothermal borehole heat exchanger around; And
(e) described the first and second collar supports part portions are joined together to form to the collar supports part of the combination that is assembled to described boring heat exchanger, and the collar supports part of described combination is suitable for hanging the described boring heat exchanger in described boring.
14. methods according to claim 13, wherein, described collar supports part hangs the total weight of the described boring heat exchanger in described boring.
15. according to the method described in claim 13 or 14, wherein, described the second collar supports part portion supports the outer sleeve of the boring heat exchanger in described boring, described outer sleeve extends through described collar supports part, and described the second collar supports part portion has the inner annular surface coordinating with the outside cylindrical surface of the upper end of described outer sleeve.
16. methods according to claim 15, wherein, the described outside cylindrical surface threaded engagement of the described second described inner annular surface of collar supports part portion and the upper end of described outer sleeve.
17. according to the method described in claim 15 or 16, wherein, described the second collar supports part portion comprises inner member and the outside guiding piece that rises and falls, described inner member is arranged on around the upper end of described boring heat exchanger, the described outside guiding piece that rises and falls is installed in described the first sleeve pipe support member portion, and described inner member is assemblied in described outside and rises and falls in guiding piece.
18. methods according to claim 17, wherein, the rise and fall interior tapered matching surface of guiding piece of the outside tapered mating surface of described inner member and described outside is complementary, and described inner member is assembled to downwards into described outside and rises and falls in guiding piece.
19. according to claim 12 to the method described in any one in 18, also comprises: assembling boring surface sleeve pipe is so that its top round the described boring heat exchanger in described boring and be assembled to described collar supports part.
Method described in 20. claims 19 when quoting claim 17, wherein, is assembled to the rise and fall inner annular surface of guiding piece of described outside by described boring surface casing threads.
21. according to claim 12 to the method described in any one in 20, and wherein, described boring heat exchanger extends downward the degree of depth that is greater than 100 meters.
22. 1 kinds of installation methods according to claim 12 to the multiple collar supports parts described in any one in 21, each collar supports part has the boring heat exchanger from this collar supports part to downward-extension in direction separately.
Method described in claim 22 when 23. bases are quoted described claim 15, wherein, the orientation of the heat exchanger of holing described at least some is different, each described orientation is to be arranged by the corresponding selection orientation of each described collar supports part.
24. according to the method described in claim 22 or 23, wherein, the upper end of described boring heat exchanger is arranged on to the preset height of described collar supports part top, and comprises the upper end that well head is assembled to described boring heat exchanger.
25. 1 kinds have the collar supports part of the geothermal borehole heat exchanger of outer sleeve, described collar supports part comprises: substrate support element, described substrate support element contains the aperture of therefrom running through, and described substrate support element is arranged to around boring by ground supports; Annular orientation induction element, described annular orientation induction element is positioned at the upper surface of described substrate support element and has the center conduit being communicated with described aperture, and the upper surface of described directional guide element becomes selected angle with respect to the lower support surface of described substrate support element; With collar supports ring, the outer sleeve that described collar supports ring is assembled in geothermal borehole heat exchanger around, described collar supports ring is connected to described directional guide element to support the sleeve pipe in described boring, and described outer sleeve extends through described collar supports ring, described center conduit and described aperture.
26. collar supports parts according to claim 25, wherein, described substrate support element and described directional guide element are integrated.
27. collar supports parts according to claim 26, wherein, described substrate support element and described directional guide element are made up of pre-cast concrete.
28. according to the collar supports part described in any one in claim 25 to 27, and wherein, described directional guide elements relative is positioned at the default rotational position about the longitudinal axis in described aperture in described substrate support element.
29. according to the collar supports part described in any one in claim 25 to 28, and wherein, the upper surface of described directional guide element favours the lower surface of described substrate support element with certain angle.
30. collar supports parts according to claim 29, wherein, described angle is the angle from 5 degree to 45 degree.
31. collar supports parts according to claim 25, wherein, described annular orientation induction element is suitable for being assembled on the upper surface of described substrate support element.
32. collar supports parts according to claim 31, wherein, described substrate support element comprises plate.
33. collar supports parts according to claim 32, wherein, described substrate support element is made up of pre-cast concrete.
34. according to the collar supports part described in any one in claim 31 to 33, wherein, described substrate support element and described directional guide element are provided with interlocking member, and described interlocking member cooperatively interacts that described directional guide elements relative is positioned to the default turned position about the longitudinal axis in described aperture in described substrate support element together.
35. collar supports parts according to claim 34, wherein, described interlocking member comprises open component and female element.
36. according to the collar supports part described in any one in claim 31 to 35, wherein, the upper surface of described directional guide element is parallel with the lower surface of described directional guide element, or the upper surface of described directional guide element favours the lower surface of described directional guide element with certain angle.
37. collar supports parts according to claim 36, wherein, the upper surface of described directional guide element and lower surface are mutually to tilt to the angle of 45 degree from 5 degree.
38. according to the collar supports part described in any one in claim 25 to 37, and wherein, described collar supports ring has the inner annular surface coordinating with the outside cylindrical surface of the upper end of described outer sleeve.
39. according to the collar supports part described in claim 38, wherein, and the described outside cylindrical surface threaded engagement of the described inner annular surface of described collar supports ring and the upper end of described outer sleeve.
40. according to the collar supports part described in claim 38 or 39, wherein, described collar supports ring comprises inner member and the outside guiding piece that rises and falls, described inner member is arranged on around the upper end of coaxial boring heat exchanger, the described outside guiding piece that rises and falls is installed on described directional guide element, and described inner member is assemblied in described outside and rises and falls in guiding piece.
41. according to the collar supports part described in claim 40, wherein, the rise and fall interior tapered matching surface of guiding piece of the outside tapered mating surface of described inner member and described outside is complementary, is risen and fallen in guiding piece so that described inner member can be installed into described outside downwards.
42. according to the collar supports part described in any one in claim 25 to 41, also comprises boring surface sleeve pipe, and described boring surface sleeve pipe is round the top of the described boring heat exchanger in described boring and be assembled to described collar supports part.
Collar supports part described in 43. claims 42 when quoting claim 40, wherein, described boring surface sleeve pipe is by the rise and fall inner annular surface of guiding piece of Screw assembly to described outside.
44. according to the collar supports part described in any one in claim 25 to 43, and wherein, described boring heat exchanger extends downward the degree of depth that is greater than 100 meters.
45. 1 kinds of well chambers, it comprises that, according to the multiple collar supports parts described in any one in claim 25 to 44, each collar supports part has the boring heat exchanger from this collar supports part to downward-extension in direction separately.
46. according to the well chamber described in claim 45, and wherein, the orientation of the heat exchanger of holing described at least some is different, and each described orientation is directed setting of corresponding selection by each directional guide element.
47. 1 kinds have the installation method of the collar supports part of the geothermal borehole heat exchanger of outer sleeve, said method comprising the steps of:
(a) the substrate support element that contains aperture is set, described substrate support element is run through in described aperture, and described substrate support element is by ground supports; With annular orientation induction element, described annular orientation induction element is positioned at the upper surface of described substrate support element and has the center conduit being communicated with described aperture, and the upper surface of described directional guide element becomes selected angle with respect to the lower support surface of described substrate support element; And
(b) to be holed by described center conduit and described aperture by the default orientation of described directional guide element.
48. according to the method described in claim 47, and wherein, described substrate support element and described directional guide element are integrated.
49. according to the method described in claim 48, wherein, forms described substrate support element and described directional guide element by pre-cast concrete.
50. according to the method described in any one in claim 47 to 49, wherein, described directional guide elements relative is positioned to the default rotational position about the longitudinal axis in described aperture in described substrate support element.
51. according to the method described in any one in claim 47 to 50, and wherein, the upper surface of described directional guide element favours the lower surface of described substrate support element with certain angle.
52. according to the method described in claim 51, and described angle is the angle from 5 degree to 45 degree.
53. according to the method described in claim 47, said method comprising the steps of:
(a) the substrate support element that contains aperture is set, described substrate support element is run through in described aperture, and described substrate support element is by ground supports;
(b) annular orientation induction element is assembled on the upper surface of described substrate support element, described directional guide element has the center conduit being communicated with described aperture, and the upper surface of described directional guide element becomes selected angle with respect to the lower support surface of described substrate support element; And
(c) to be holed by described center conduit and described aperture by the default orientation of described directional guide element.
54. according to the method described in claim 53, and wherein, described substrate support element comprises plate.
55. according to the method described in claim 54, wherein, forms described substrate support element by pre-cast concrete.
56. according to the method described in any one in claim 53 to 55, wherein, described substrate support element and described directional guide element are provided with interlocking member, and described interlocking member cooperatively interacts that described directional guide elements relative is positioned to the default rotational position about the longitudinal axis in described aperture in described substrate support element together.
57. according to the method described in claim 56, and wherein, described interlocking member comprises open component and female element.
58. according to the method described in any one in claim 53 to 57, wherein, the upper surface of described directional guide element is parallel with the lower surface of described directional guide element, or the upper surface of described directional guide element favours the lower surface of described directional guide element with certain angle.
59. according to the method described in claim 58, and wherein, the upper surface of described directional guide element and lower surface are mutually to tilt to the angle of 45 degree from 5 degree.
60. also comprise according to the method described in any one in claim 47 to 59: mounting sleeve support ring, surrounding and described collar supports ring that described collar supports ring is assembled to the outer sleeve of geothermal borehole heat exchanger are connected to described directional guide element to support the sleeve pipe in described boring, described outer sleeve extends through described collar supports ring, described center conduit and described aperture, and described collar supports ring has the inner annular surface coordinating with the outside cylindrical surface of the upper end of described outer sleeve.
61. according to the method described in claim 60, wherein, and the described outside cylindrical surface threaded engagement of the described inner annular surface of described collar supports ring and the upper end of described outer sleeve.
62. according to the method described in claim 60 or 61, wherein, described collar supports ring comprises inner member and the outside guiding piece that rises and falls, described inner member is installed in around the upper end of coaxial boring heat exchanger, the described outside guiding piece that rises and falls is installed on described directional guide element, shown in inner member be assembled in described outside and rise and fall in guiding piece.
63. according to the method described in claim 62, and wherein, the rise and fall interior tapered matching surface of guiding piece of the outside tapered mating surface of described inner member and described outside is complementary, and described inner member is fitted into described outside downwards and rises and falls in guiding piece.
64. according to the method described in any one in claim 60 to 64, also comprises: boring surface sleeve pipe is assembled into round the top of the described boring heat exchanger in described boring and is assembled to described collar supports ring.
Method described in 65. claims 64 when quoting claim 62, wherein, is assembled to the rise and fall inner annular surface of guiding piece of described outside by described boring surface casing threads.
66. according to the method described in any one in claim 60 to 65, and wherein, described boring heat exchanger extends downward the degree of depth that is greater than 100 meters.
67. 1 kinds according to the installation method of multiple collar supports parts of the method described in any one in claim 60 to 66, and each collar supports part has the boring heat exchanger from this collar supports part to downward-extension in orientation separately.
68. according to the method described in claim 67, and wherein, the orientation of the heat exchanger of holing described at least some is different, and each described orientation is to be arranged by the corresponding selection orientation of each directional guide element.
69. according to the method described in claim 67 or 68, and wherein, the upper end of described boring heat exchanger is arranged on the preset height of described substrate support element top, and comprises the upper end that well head is assembled to described boring heat exchanger.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1119470.1A GB2491664B (en) | 2011-11-11 | 2011-11-11 | Orienting and supporting a casing of a coaxial geothermal borehole |
| GB1119470.1 | 2011-11-11 | ||
| GB1215986.9A GB2491746B (en) | 2011-11-11 | 2012-09-07 | Orienting and supporting a casing of a coaxial geothermal borehole |
| GB1215986.9 | 2012-09-07 | ||
| PCT/EP2012/072332 WO2013068570A2 (en) | 2011-11-11 | 2012-11-09 | Orienting and supporting a casing of a coaxial geothermal borehole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104040270A true CN104040270A (en) | 2014-09-10 |
Family
ID=45421614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280066859.1A Pending CN104040270A (en) | 2011-11-11 | 2012-11-09 | Orienting and supporting a casing of a coaxial geothermal borehole |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20140299291A1 (en) |
| EP (1) | EP2776766A2 (en) |
| JP (1) | JP2014533332A (en) |
| KR (1) | KR20140127799A (en) |
| CN (1) | CN104040270A (en) |
| CA (1) | CA2854841A1 (en) |
| GB (3) | GB2491664B (en) |
| WO (1) | WO2013068570A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105716330A (en) * | 2016-04-25 | 2016-06-29 | 丹东市安通空调制冷安装维修工程有限责任公司 | Water collecting and returning integrated well structure with filtering pipe moving downwards |
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| GB2450754B8 (en) | 2007-07-06 | 2013-02-06 | Greenfield Energy Ltd | Geothermal energy system and method of operation |
| GB2450755B (en) | 2007-07-06 | 2012-02-29 | Greenfield Energy Ltd | Geothermal energy system and method of operation |
| GB2461029B (en) | 2008-06-16 | 2011-10-26 | Greenfield Energy Ltd | Thermal energy system and method of operation |
| GB2488797A (en) | 2011-03-08 | 2012-09-12 | Greenfield Master Ipco Ltd | Thermal Energy System and Method of Operation |
| DE102013003307B4 (en) * | 2013-02-28 | 2015-06-03 | Tracto-Technik Gmbh & Co. Kg | Device for holding a shaft rim on a shaft element |
| US10088199B2 (en) | 2016-09-09 | 2018-10-02 | Korea Institute Of Energy Research | Coaxial ground heat exchanger and ground heat exchange system including the same |
| RU2641439C9 (en) * | 2017-02-28 | 2018-03-22 | Станислав Александрович Демов | Method for installing geothermal heat exchangers for low-grade heat extraction |
| US11536472B2 (en) | 2018-07-30 | 2022-12-27 | John P. Ballegeer | Concentric pipe geothermal heat exchanger well head |
| US20230107830A1 (en) * | 2020-03-27 | 2023-04-06 | Schlumberger Technology Corporation | Wellhead container for a geothermal system |
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- 2012-11-09 WO PCT/EP2012/072332 patent/WO2013068570A2/en active Application Filing
- 2012-11-09 CA CA2854841A patent/CA2854841A1/en not_active Abandoned
- 2012-11-09 CN CN201280066859.1A patent/CN104040270A/en active Pending
- 2012-11-09 KR KR20147015903A patent/KR20140127799A/en not_active Application Discontinuation
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Also Published As
| Publication number | Publication date |
|---|---|
| GB2491664B (en) | 2014-04-23 |
| WO2013068570A3 (en) | 2013-08-22 |
| GB201218685D0 (en) | 2012-11-28 |
| CA2854841A1 (en) | 2013-05-16 |
| GB201215986D0 (en) | 2012-10-24 |
| JP2014533332A (en) | 2014-12-11 |
| GB2491746B (en) | 2014-07-02 |
| GB2491794A (en) | 2012-12-12 |
| WO2013068570A2 (en) | 2013-05-16 |
| GB2491794B (en) | 2015-04-08 |
| EP2776766A2 (en) | 2014-09-17 |
| KR20140127799A (en) | 2014-11-04 |
| GB201119470D0 (en) | 2011-12-21 |
| GB2491746A (en) | 2012-12-12 |
| US20140299291A1 (en) | 2014-10-09 |
| GB2491664A (en) | 2012-12-12 |
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Application publication date: 20140910 |