CN106152609A - A kind of well factory earth source heat pump well spacing line method - Google Patents
A kind of well factory earth source heat pump well spacing line method Download PDFInfo
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- CN106152609A CN106152609A CN201510135659.2A CN201510135659A CN106152609A CN 106152609 A CN106152609 A CN 106152609A CN 201510135659 A CN201510135659 A CN 201510135659A CN 106152609 A CN106152609 A CN 106152609A
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Abstract
The invention discloses a kind of well factory earth source heat pump well spacing line method, first, ground heat exchanger (3) actual heat exchange amount and length is accurately calculated according to heating area, and then buried tube heat exchanger (3) wellhole (1) number and well spacing line definitely, including wellbore locations, hole pattern, casing programme, wellbore trajectory and target spot (2) position；Then, according to well factory drilling well order, suitable drilling fluid is selected to be drilled with horizontal well pit shaft (4) successively, until completing wellbore construction operation；Finally, double-U-shaped ground heat exchanger (3) system is installed in lower section successively.In the present invention, circulation fluid can closed in horizontal well pipe laying fully and geothermal energy resources carry out efficient heat exchange, improve individual well heat exchange amount, the most effectively solve horizontal coiled pipe technology big with the most single double-U-shaped buried-pipe system floor space, the problem that the pipe laying depth of burying is shallower, increase economic efficiency.
Description
Technical field
The present invention relates to geothermal energy utilization field, particularly to a kind of well factory earth source heat pump well spacing line method, in the case of being specially adapted to ground buried pipe of ground source heat pump well spacing limited location.
Background technology
Earth source heat pump is as novel, the cleaning of one, environmental protection, efficient energy technology, it has also become the Critical policies of Renewable Energy Development.It utilizes the metastable soil in underground, underground water temperature, obtains soil, the new device of underground internal water cooling (hot) energy by medium, and earth source heat pump is by inputting a small amount of high-grade energy (such as electric energy), it is achieved low-temperature heat energy shifts to high-temperature position.Thermal source and the low-temperature receiver of summer air-conditioning as heat pump heating in the winter time can distinguish in ground, the most in the winter time, the heat in ground energy " is taken " out, after improving temperature, and supply indoor heating；In summer, indoor heat is taken out, goes down with being discharged into.Earth source heat pump, when electric energy converts, inputs 1 part of electricity, can extract 3～5 parts of heat from underground, more energy efficient compared to air-conditioning, Electric heat radiator, more saving the electric energy of more than 2/3 than electric boiler heating, save the energy of more than 1/2 than gas fired-boiler, operating cost is the 40%～60% of ordinary central air-conditioner.Therefore, the leading situation during ground source heat pump technology becomes HVAC industry.
Earth source heat pump all uses underground pipe form, ground temperature is stable at about 18 DEG C throughout the year, can be that air-conditioner host provides preferable condensation temperature and evaporating temperature, circulation fluid carries out heat transfer exchange in the underground pipe system closed between flowing and the earth, composition ground heat exchanger system, but the pipe laying mode that in prior art, ground heat exchanger system uses is based on horizontal coiled pipe and the most single two kinds of forms of double-U-shaped pipe laying, other pipe laying form all development evolvement on the basis of above two form, all have its weak point.Horizontal coiled pipe construction is simple, and floor space is big, and the pipe laying depth of burying is shallower, and geothermal energy heat exchanger effectiveness is the highest；Vertical single double-U-shaped pipe laying, generally, well spacing is 4m～5.5m, and dig a well a diameter of 120mm～160mm, is 150～300 according to requirement of engineering drilling hole amount, therefore, if engineering project is relatively big, then needs to drill through large number of orifices to bury U heat exchange underground.In earth-source hot-pump system, subterranean well and underground pipe investment part often to account for the 50%～60% of whole project initial investment, improve individual well heat exchange amount, reduce drilling well number and can produce higher economic benefit.
Summary of the invention
It is an object of the invention to provide a kind of well factory earth source heat pump well spacing line method, use well factory drilling well form, constitute ground buried pipe of ground source heat pump heat-exchange system, solve the problem that existing ground source heat pump imbedded pipe mode exists.
For solving the problems referred to above, the present invention is realized by following technique measures (step):
(1) need to heat or cooling area according to engineering project, accurately calculate maximum heat release amount in summer and maximum caloric receptivity in winter, choose suitable surplus coefficiert, accurately calculate ground heat exchanger actual heat exchange amount；
(2) base area pipe laying is actual changes amount of heat, consider the influence factors such as soil property (thermal conduction of soil), back-filling way, pipe laying form, kind of tube types and seepage action of ground water situation, accurately calculate ground heat exchanger length in conjunction with earth source heat pump practical operating experiences；
(3) by earth source heat pump construction site restrictive condition and earth source heat pump construction technical requirement, the wellhole number of buried tube heat exchanger definitely, according to the drilling depth of the above-mentioned each wellhole of ground heat exchanger length computation；
(4) by well factory casing programme feature and construction characteristic, according to earth source heat pump construction site restrictive condition buried tube heat exchanger wellbore locations definitely, determine well factory well spacing line, wellbore trajectory and drilling well target position according to the restrictive condition such as Adjacent Buildings of ground heat exchanger；
(5) according to the well logging drilling well requirement of well factory, determine well factory drilling well order, avoid wellbore trace space crossed, the mode utilizing kickoff point (KOP) mutually to stagger solves anti-collision between well, directional well drilling technology is used to be drilled with well factory wellhole, using directional inclination and hold angle construction operation, its well factory well profile type is " straight well section increasing hole angle section steady tilted section " three sections of systems, stops to bore when being drilled into target position；
(6) according to well engineering drilling well order, drilling-machine shifter to next wellbore locations being carried out drilling well, repeat the above steps (5), until completing whole drillng operation；
(7) in each wellhole, transferring the double-U-shaped ground heat exchanger of installation successively, according to earth source heat pump kind and use requirement, selecting rational connected mode, until completing the installation of ground heat exchanger system.
Described well factory well group hole pattern is determined with construction site by wellhole quantity, and wellbore trajectory is determined by the factor such as Adjacent Buildings, geological conditions, and target position is determined by buried tube heat exchanger length practically.
Described well factory well group is made up of horizontal well, can be divided into two well formulas, four well formulas, six well formulas etc., and according to construction site region limits condition, hole pattern can be square array, circular array or random arrangement.
Described wellbore trajectory is two-dimensional orbit, does not design 3d orbit.
Described well factory casing programme, wherein straight well section base area buried pipe length appropriate design, build angle rate chooses 12.5o/ 100m or 15oThe mean curvature radius of/100m, steady tilted section construction is taked specific BHA, is made hole deviation hold or micro-increasing or edge down, control hole azimuth angle simultaneously so that hole deviation and orientation meet the requirement that hits.
In described well factory drilling process, suitable drilling fluid need to be selected to improve drilling efficiency according to different regions geology characteristic and condition.
The present invention has the beneficial effect that:
A kind of well factory of the present invention earth source heat pump well spacing line method, coal bed gas well factory drilling well development mode is applied in ground buried pipe of ground source heat pump heat exchanger system, horizontal well pipe laying mode is used to replace horizontal coiled pipe and the most single two kinds of pipe laying modes of double-U-shaped pipe laying in prior art, circulation fluid flows in the horizontal well pipe laying closed, make full use of the efficient heat exchange that geothermal energy resources realize between system and the earth, improve individual well heat exchange amount, simultaneously, effectively solve horizontal coiled pipe technology big with the most single double-U-shaped buried-pipe system floor space, the problem that the pipe laying depth of burying is shallower, it is particularly directed to big-and-middle-sized earth source heat pump project under construction, well factory earth source heat pump well spacing line method can substantially reduce drilling well number and land seizure area, improve individual well heat exchange efficiency, produce higher economic benefit.
Accompanying drawing explanation
Fig. 1 is the well factory earth source heat pump well spacing line overall structure schematic diagram of the present invention；
Fig. 2 is the well factory well spacing position view of the present invention；
Fig. 3 is the individual well structural representation of the present invention；
Figure is labeled as: 1: wellhole；2: target spot；3: ground heat exchanger；4: horizontal well pit shaft；5: straight well section；6: inclination section；7: steady tilted section.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention is further described.
Described a kind of well factory earth source heat pump well spacing line method, as shown in Figure 1, Figure 2 and Figure 3, is embodied as step as follows:
Step 1: need to heat or area of heat-supply service according to engineering project, accurately calculates maximum heat release amount in summer and maximum caloric receptivity in winter, chooses suitable safety coefficient, accurately calculate ground heat exchanger 3 actual heat exchange amount；
Step 2: base area pipe laying is actual changes amount of heat, consider the influence factors such as soil property (thermal conduction of soil), back-filling way, pipe laying form, kind of tube types and seepage action of ground water situation, accurately calculate ground heat exchanger 3 length in conjunction with earth source heat pump practical operating experiences；
Step 3: by earth source heat pump construction site restrictive condition and earth source heat pump construction technical requirement, wellhole 1 number of buried tube heat exchanger 3 definitely, two well formulas, four well formulas, six well formulas etc. can be divided into, according to the drilling depth of the above-mentioned ground heat exchanger 3 each wellhole of length computation 1；
Step 4: by well factory casing programme feature and construction characteristic, according to restrictive condition buried tube heat exchanger 3 wellhole 1 position definitely, construction site, design hole pattern is square array or circular array, and between wellhole 1, spacing is 3m～5m, and concrete spacing should carry out appropriate design according to construction site size.Being determined casing programme by factors such as construction site Adjacent Buildings and geological conditions, well group is made up of horizontal well, is two-dimensional orbit.Drilling well target spot 2 position is determined by buried tube heat exchanger length and wellbore trajectory practically；
Step 5: according to the well logging drilling well requirement of well factory, determines well factory drilling well order, it is to avoid wellbore trace is space crossed, and the mode utilizing kickoff point (KOP) mutually to stagger solves anti-collision problem between well.According to different regions geology characteristic and condition, select suitable drilling fluid to improve drilling efficiency, take directional well drilling technology to be drilled with wellhole simultaneously, directional inclination technology and hold angle technology is used to be drilled with inclination section 6 and steady tilted section 7 respectively, its well factory well profile type is " straight well section 5 increasing hole angle section 6 steady tilted section 7 " three sections of systems, wherein straight well section base area buried pipe length appropriate design, build angle rate chooses 12.5o/ 100m or 15oThe mean curvature radius of/100m, steady tilted section 7 construction is taked specific BHA, is made hole deviation hold or micro-increasing or edge down, control hole azimuth angle simultaneously, make hole deviation and orientation meet the requirement hit, stop when being drilled into target spot 2 position to bore, complete horizontal well pit shaft 4 and be drilled with construction；
Step 6: according to well engineering drilling well order, drilling-machine shifter to next wellhole 1 position is carried out drilling well, repeat the above steps 5, until completing whole drillng operation；
Step 7: transfer the double-U-shaped ground heat exchanger 3 of installation successively in each wellhole 1, according to earth source heat pump kind and use requirement, selects rational connected mode, until completing the installation of ground heat exchanger 3 system.
Claims (5)
1. a Zhong Jing factory earth source heat pump well spacing line method, including following step, it is characterised in that:
Step 1: need to heat or cooling area according to engineering project, accurately calculates maximum heat release amount in summer and maximum caloric receptivity in winter, chooses suitable surplus coefficiert, accurately calculate ground heat exchanger (3) actual heat exchange amount；
Step 2: base area pipe laying is actual changes amount of heat, consider the influence factors such as soil property (thermal conduction of soil), back-filling way, pipe laying form, kind of tube types and seepage action of ground water situation, accurately calculate ground heat exchanger (3) length in conjunction with earth source heat pump practical operating experiences；
Step 3: by earth source heat pump construction site restrictive condition and earth source heat pump construction technical requirement, wellhole (1) number of buried tube heat exchanger (3) definitely, according to the drilling depth of each wellhole of above-mentioned ground heat exchanger (3) length computation (1)；
Step 4: by well factory casing programme feature and construction characteristic, according to earth source heat pump construction site restrictive condition buried tube heat exchanger definitely (3) wellhole (1) position, determine well factory well spacing line, wellbore trajectory and drilling well target spot (2) position according to the restrictive condition such as Adjacent Buildings of ground heat exchanger (3)；
Step 5: according to the well logging drilling well requirement of well factory, determine well factory drilling well order, avoid wellbore trace space crossed, the mode utilizing kickoff point (KOP) mutually to stagger solves anti-collision problem between well, using directional well drilling technology to be drilled with well factory wellhole, use directional inclination and hold angle construction operation, its well factory well profile type is " straight well section (5) increasing hole angle section (6) steady tilted section (7) " three sections of systems, stop when being drilled into target spot (2) position to bore, complete horizontal well pit shaft (4) and be drilled with construction；
Step 6: according to well engineering drilling well order, drilling-machine shifter to next wellhole (1) position is carried out drilling well, repeat the above steps 5, until completing whole drillng operation；
Step 7: transfer the double-U-shaped ground heat exchanger of installation (3) successively in each wellhole (1), according to earth source heat pump kind and use requirement, selects rational connected mode, until completing the installation of ground heat exchanger (3) system.
2. a kind of well factory as claimed in claim 1 earth source heat pump well spacing line method, it is characterized in that: well factory well group hole pattern is determined with construction site by wellhole (1) quantity, wellbore trajectory is determined by the factor such as Adjacent Buildings, geological conditions, and target spot (2) position is determined by buried tube heat exchanger practically (3) length.
3. a kind of well factory as claimed in claim 1 earth source heat pump well spacing line method, it is characterized in that: well factory well group is made up of horizontal well (4), two well formulas, four well formulas, six well formulas etc. can be divided into, according to construction site region limits condition, hole pattern can be square array, circular array or random arrangement.
4. a kind of well factory as claimed in claim 1 earth source heat pump well spacing line method, it is characterised in that: well factory casing programme, wherein straight well section base area buried pipe length appropriate design, build angle rate chooses 12.5o/ 100m or 15oThe mean curvature radius of/100m, steady tilted section (7) construction is taked specific BHA, is made hole deviation hold or micro-increasing or edge down, control hole azimuth angle simultaneously so that hole deviation and orientation meet the requirement that hits.
5. a kind of well factory as claimed in claim 1 earth source heat pump well spacing line method, it is characterised in that: in well factory drilling process, suitable drilling fluid need to be selected to improve drilling efficiency according to different regions geology characteristic and condition.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894804A (en) * | 2017-03-06 | 2017-06-27 | 中国石油集团钻井工程技术研究院 | A kind of enhanced geothermal system completion method of standing column well |
| CN111894547A (en) * | 2020-07-30 | 2020-11-06 | 陕西煤业化工技术研究院有限责任公司 | Heat exchange type horizontal well, heat exchange type cross orthogonal horizontal well factory and construction method |
| CN113279728A (en) * | 2021-06-04 | 2021-08-20 | 中国地质科学院勘探技术研究所 | Medium-deep geothermal energy closed heat exchange structure and process method thereof |
| CN113343444A (en) * | 2021-05-24 | 2021-09-03 | 河南中烟工业有限责任公司 | Structural design method of double-U-shaped cold and hot dual-purpose ground heat exchanger |
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| CN101796296A (en) * | 2007-07-06 | 2010-08-04 | 绿地能源有限公司 | Geothermal energy system and operating method |
| CN101821503A (en) * | 2007-07-06 | 2010-09-01 | 绿地能源有限公司 | Geothermal energy system and operating method |
| CN102022860A (en) * | 2009-09-10 | 2011-04-20 | 山东亚特尔集团股份有限公司 | Process method and equipment for constructing ground source heat pump well |
| CN102099577A (en) * | 2008-06-16 | 2011-06-15 | 绿地能源有限公司 | Thermal energy system and operation method thereof |
| CN103883255A (en) * | 2013-06-24 | 2014-06-25 | 中国石油化工股份有限公司 | Horizontal well landing path control method based on continuously-oriented well drilling |
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Patent Citations (5)
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| CN101796296A (en) * | 2007-07-06 | 2010-08-04 | 绿地能源有限公司 | Geothermal energy system and operating method |
| CN101821503A (en) * | 2007-07-06 | 2010-09-01 | 绿地能源有限公司 | Geothermal energy system and operating method |
| CN102099577A (en) * | 2008-06-16 | 2011-06-15 | 绿地能源有限公司 | Thermal energy system and operation method thereof |
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| CN103883255A (en) * | 2013-06-24 | 2014-06-25 | 中国石油化工股份有限公司 | Horizontal well landing path control method based on continuously-oriented well drilling |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894804A (en) * | 2017-03-06 | 2017-06-27 | 中国石油集团钻井工程技术研究院 | A kind of enhanced geothermal system completion method of standing column well |
| CN111894547A (en) * | 2020-07-30 | 2020-11-06 | 陕西煤业化工技术研究院有限责任公司 | Heat exchange type horizontal well, heat exchange type cross orthogonal horizontal well factory and construction method |
| CN113343444A (en) * | 2021-05-24 | 2021-09-03 | 河南中烟工业有限责任公司 | Structural design method of double-U-shaped cold and hot dual-purpose ground heat exchanger |
| CN113279728A (en) * | 2021-06-04 | 2021-08-20 | 中国地质科学院勘探技术研究所 | Medium-deep geothermal energy closed heat exchange structure and process method thereof |
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Application publication date: 20161123 |