CN101908846B - Method and system for generating through underground temperature difference - Google Patents
Method and system for generating through underground temperature difference Download PDFInfo
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- CN101908846B CN101908846B CN200910016328.1A CN200910016328A CN101908846B CN 101908846 B CN101908846 B CN 101908846B CN 200910016328 A CN200910016328 A CN 200910016328A CN 101908846 B CN101908846 B CN 101908846B
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- temperature
- temperature difference
- drill collar
- heat
- layer
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 34
- 230000005678 Seebeck effect Effects 0.000 claims abstract 2
- 238000009413 insulation Methods 0.000 claims description 35
- 238000010248 power generation Methods 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 4
- 239000011253 protective coating Substances 0.000 abstract 4
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A method and a system for generating through underground temperature difference are the method and system for generating by utilizing the underground temperature condition in the drilling process according to Seebeck effect. The system comprises a drilling pipe with a thermal-protective coating, a drill collar and a temperature difference generating device which comprises a heat transmitting part, a radiating part and a temperature difference generating module. The method comprises the steps of: adding a layer of heat insulation materials in the inner wall of the drilling pipe and the drill collar as the thermal-protective coating, adding a layer of compression-resist anti-corrosion materials on the inner wall of the thermal-protective coating as the inner wall layer so as to form the drilling pipe with a thermal-protective coating and the drill collar, transmitting heat of the outer wall to the heating end of the temperature difference generating module through the heat transmitting part, contacting the radiating part with the mud flowed into the drill collar so as to ensure a lower temperature at the cooling end of the temperature difference generating module, transforming the temperature difference into a potential difference through the temperature difference generating module, and supplying to underground measuring devices like a wireless drilling clinometer after switching through a voltage-stabilizing constant-current circuit or storing and backing up the electric power in a storage battery for the underground measuring device, so as to prolong the continuous working time of the underground measuring devices like a wireless drilling clinometer.
Description
Art
The present invention relates to a kind of method utilizing thermo-electric generation, it is the method and system utilizing the generating of drilling well downhole temperature difference.
Background technology
At present, thermoelectric generation has been applied to a lot of field, it is according to Sai Beike (Seebeck) effect, when two kinds of different conductors are connected into closed-loop path, if its two contacts are placed in two different environment of temperature respectively, then just have electric current in circuit and produce, the electromotive force V=a Δ T of generation current, in formula, a is thermoelectric power, and Δ T is the temperature difference between contact.But in oil drilling, also not yet apply this technology, along with the impact of well depth and geological environment in drilling process, downhole temperature can corresponding rising, in addition drill bit along with drilling well the degree of depth can with the rock frictional test of underground, amount of heat can be produced, now from drill bit more close to temperature higher, due to mud be from drilling rod and bore very in flow to drill bit, as long as drilling rod and drill collar internal layer have certain thermal insulation function, and the mud temperature flow to is lower, the mud in the drill collar outer wall layer of bit part and drilling rod and drill collar just has a larger temperature difference.
Summary of the invention
In order to utilize the temperature difference resource in drilling process, unnecessary heat is converted to electric energy, after pressure-stabilizing constant flow circuit conversion, be can be used for by this part electric energy the device for subsurface measuring such as wireless drilling inclinometers to use, also can by electrical power storage in the storage battery of device for subsurface measuring, thus improve the stream time of the device for subsurface measuring such as wireless drilling inclinometers, the invention provides a kind of generating through underground temperature difference method and system.
The technical solution adopted for the present invention to solve the technical problems is: a. adds one deck heat-barrier material at drilling rod and drill collar main body inner wall, for thermal insulation layer, thermal insulation layer will have good resistance to compression and damping behavior, and it is thin as much as possible on the basis ensureing heat-insulating capability, thermal insulation layer inwall adds one deck pressure-resistant corrosion-resisting material, for inner wall layer (with mud contacts part), thus the drill collar of composition band thermal insulation layer and drilling rod.B. two kinds of semiconductors are adopted, two semiconductors are a generating set, hot junction (heat absorbing end) pin connects, cold junction (radiating end) pin disconnects, as positive-negative power line, the method composition temperature-difference power generation module more generating set series, parallel or connection in series-parallel combined according to actual needs is to obtain required voltage and current.Specialized designs goes out the heat transfer unit (HTU) of long distance, is heat transfer part, is made up of heat-sink shell (being made up of superconduction adiabator), heat-insulation layer, resistance to compression layer.Heat-sink shell contacts with the drill collar outer wall layer of band thermal insulation layer.Heat abstractor adopts and leads adiabator, is radiator portion.Radiator portion and the mud contacts flowing into drill collar.Increase the contact area of radiator portion and mud as required as far as possible, to improve rate of heat dissipation.Be sealed in pressure-proof outer cover by temperature-difference power generation module, heat-sink shell and heat-insulation layer, positive-negative power line is drawn from pressure-proof outer cover, provides power supply to device for subsurface measuring, and pressure-proof outer cover plays thermolysis simultaneously.Heat transfer part, temperature-difference power generation module, radiator portion composition temperature difference electricity generation device.Also can temperature difference electricity generation device be built in drill collar, utilize the drill collar outer wall layer of band thermal insulation layer as heat transfer part, using inner wall layer as radiator portion.Drill collar with thermal insulation layer and drilling rod, temperature difference electricity generation device composition generating through underground temperature difference system.
Bore very when high-pressure slurry flows into, through temperature difference transmitting apparatus, heat dissipating layer with through mud temperature conduct after the cold junction temperature of temperature-difference power generation module is kept and to flow through mud temperature close, make the cold junction of temperature-difference power generation module have a lower temperature.Drill collar outer wall layer temperature with thermal insulation layer can change along with ground temperature and drill bit and the stratum impact that friction generates heat, and the heat transfer part of temperature difference electricity generation device conducts heat to the hot junction of temperature-difference power generation module.The cold junction of temperature-difference power generation module and hot junction there has been a temperature difference, thus partial heat energy is converted to electric energy.
The invention has the beneficial effects as follows, by be connected with pressure-stabilizing constant flow circuit can power to device for subsurface measuring such as wireless drilling inclinometers or by electrical power storage in storage battery, for subsequent use for device for subsurface measuring such as wireless drilling inclinometers; Adopt drill collar and the drilling rod of band thermal insulation layer, make the mud temperature flowing into drill collar and drilling rod lower, thus reduce the impact of high temperature on device for subsurface measuring, the device for subsurface measuring such as directional tool are used in high temperature geological environment; The thermal insulation layer of drill collar and drilling rod has certain damping behavior, thus reduces the impact of vibration on device for subsurface measuring.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 is drill bit, the brill of band thermal insulation layer is endured, the overall structure figure of temperature difference electricity generation device, wireless drilling inclinometers embodiment.
Fig. 2 is the band drill collar of thermal insulation layer and the transverse cross-sectional view of drilling rod embodiment.
Fig. 3 is the longitudinal sectional drawing of temperature-difference power generation module embodiment.
Fig. 4 is the longitudinal sectional drawing of temperature difference electricity generation device and band thermal insulation layer drill collar embodiment.
1. temperature difference electricity generation devices in Fig. 1, are 2. with the drill collar of thermal insulation layer, 3. wireless drilling inclinometers, 4. drill bit.
1. outer wall layers, 2. thermal insulation layer, 3. inner wall layer in Fig. 2.
1.N type semiconductor in Fig. 3,2.P type semiconductor, 3. insulating heat-conductive component.
1. temperature-difference power generation modules, 2. heat-sink shell, 3. heat-insulation layer in Fig. 4,4 resistance to compression layers.
Embodiment
In the embodiment shown in fig. 1, temperature difference electricity generation device (1) is arranged on the brill of the band thermal insulation layer being positioned at drill bit (4) top very (2), wireless drilling inclinometers (3) is positioned at the top of temperature difference electricity generation device (1).
In the embodiment depicted in figure 2, by inner wall layer (3) from drill collar or to bore one end and the outer wall layer (1) of drilling rod fixing, there is uniform space centre, pours in space, form thermal insulation layer (2) after foaming by the fluent material forming polyurethane foam plastic.
In the embodiment shown in fig. 3, N type semiconductor (1) and P type semiconductor (2) two are a generating set, each group bottom connects from left to right, second pin of tip portion first group is connected with first pin of second group, second pin of second group is connected with first pin of the 3rd group, three generating set series connection, two ends connect insulating heat-conductive component (3) respectively and form hot junction and cold junction, thus constitute a temperature-difference power generation module, the wire of second pin outer layer insulation of first pin of first generating set and the 3rd generating set is drawn.
In the embodiment shown in fig. 4, a part for heat-sink shell (2) is built in the thermal insulation layer of the drill collar of band thermal insulation layer, and one end is connected with the outer wall layer of the drill collar of band thermal insulation layer, a part for heat-sink shell (2) is drawn from the thermal insulation layer and inner wall layer being with the drill collar of thermal insulation layer, its ectomesoderm is heat-insulation layer (3), the other end of heat-sink shell is connected with the hot junction of temperature-difference power generation module (1), the cold junction of temperature-difference power generation module (1) is connected with resistance to compression layer (4), resistance to compression layer (4) is simultaneously as the heat dissipating layer of temperature-difference power generation module (1), heat-insulation layer (3) and temperature-difference power generation module (1) are sealed in resistance to compression layer (4).
Slurry flows is when resistance to compression layer, temperature-difference power generation module cold junction is made to have a lower temperature, the outer wall layer heat of the drill collar of heat-sink shell absorption band thermal insulation layer, heat-insulation layer keeps the heat of heat-sink shell not absorbed by the low temperature mud flowing to drill bit, heat-sink shell rapidly by delivered heat to the hot junction of temperature-difference power generation module, hot-side temperature is raised, at this moment the hot junction of generating set and cold junction have just had a temperature difference, the bipod that temperature-difference power generation module is drawn there has been an electromotive force, by being connected with pressure-stabilizing constant flow circuit, thus the direct current of stable output voltage and constant current, can power to the wireless drilling inclinometers that the brill being arranged on band thermal insulation layer is very interior, also can by electrical power storage in the storage battery of wireless drilling inclinometers.
Claims (1)
1. a generating through underground temperature difference method, it is characterized in that: the drill collar and the drilling rod that utilize band thermal insulation layer, and temperature difference electricity generation device is installed, drill collar with thermal insulation layer and drilling rod are primarily of outer wall layer, thermal insulation layer, inner wall layer forms, temperature difference electricity generation device is by temperature-difference power generation module, heat transfer part, radiator portion forms, the partial heat of drill collar outer wall layer is transmitted to the hot junction of temperature-difference power generation module by heat transfer part, radiator portion and the mud contacts flowing into drilling rod and drill collar, the two ends of temperature-difference power generation module are made to produce temperature difference, temperature difference is directly converted to electrical potential difference by Seebeck effect by temperature-difference power generation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910016328.1A CN101908846B (en) | 2009-06-06 | 2009-06-06 | Method and system for generating through underground temperature difference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910016328.1A CN101908846B (en) | 2009-06-06 | 2009-06-06 | Method and system for generating through underground temperature difference |
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| Publication Number | Publication Date |
|---|---|
| CN101908846A CN101908846A (en) | 2010-12-08 |
| CN101908846B true CN101908846B (en) | 2015-04-01 |
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| CN200910016328.1A Expired - Fee Related CN101908846B (en) | 2009-06-06 | 2009-06-06 | Method and system for generating through underground temperature difference |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9741916B2 (en) * | 2013-07-24 | 2017-08-22 | Saudi Arabian Oil Company | System and method for harvesting energy down-hole from an isothermal segment of a wellbore |
| CN105958870B (en) * | 2016-06-29 | 2017-11-21 | 中国石油大学(华东) | Compound low-temperature receiver hot dry rock thermoelectric heat generation system and method |
| CN106130406B (en) * | 2016-06-29 | 2017-11-17 | 中国石油大学(华东) | Stratum itself low-temperature receiver type hot dry rock thermoelectric heat generation system and method |
| US10914168B2 (en) * | 2017-01-17 | 2021-02-09 | Hypersciences, Inc. | System for acoustic navigation of boreholes |
| DE102017206090A1 (en) | 2017-04-10 | 2018-10-11 | Bayerische Motoren Werke Aktiengesellschaft | A method of making a foamed decorative article for a motor vehicle, film for use in such a process and foamed decoratable carrier |
| CN108457609A (en) * | 2018-03-23 | 2018-08-28 | 吉林大学 | A kind of temperature difference power generation type high temperature mud cooling recirculation system |
| CN108425637A (en) * | 2018-04-13 | 2018-08-21 | 吉林大学 | A kind of generating power downhole drilling rod and its electricity-generating method |
| CN110021988B (en) * | 2019-04-28 | 2022-04-12 | 中国石油集团渤海钻探工程有限公司 | Temperature difference type thermoelectric downhole power supply |
| CN110778310A (en) * | 2019-10-12 | 2020-02-11 | 中国海洋石油集团有限公司 | Installation inclinometer while drilling |
| CN111082706A (en) * | 2019-12-28 | 2020-04-28 | 西南石油大学 | Temperature difference power generation method and device in gas drilling drill string |
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|---|---|---|---|---|
| CN1848657A (en) * | 2006-03-15 | 2006-10-18 | 大连海事大学 | Porous dielectric ultra-adiabatic combustion temperature difference power generating method under reciprocating flouing and apparatus thereof |
| CN1897445A (en) * | 2005-07-12 | 2007-01-17 | 孟英志 | Generation and generator, energy conversion and converter |
| CN2876564Y (en) * | 2006-03-15 | 2007-03-07 | 大连海事大学 | Reciprocating flow low porous medium superadiabatic burning temp. difference electric generating device |
| JP4114528B2 (en) * | 2003-03-26 | 2008-07-09 | ヤマハ株式会社 | Thermoelectric generator |
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- 2009-06-06 CN CN200910016328.1A patent/CN101908846B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4114528B2 (en) * | 2003-03-26 | 2008-07-09 | ヤマハ株式会社 | Thermoelectric generator |
| CN1897445A (en) * | 2005-07-12 | 2007-01-17 | 孟英志 | Generation and generator, energy conversion and converter |
| CN1848657A (en) * | 2006-03-15 | 2006-10-18 | 大连海事大学 | Porous dielectric ultra-adiabatic combustion temperature difference power generating method under reciprocating flouing and apparatus thereof |
| CN2876564Y (en) * | 2006-03-15 | 2007-03-07 | 大连海事大学 | Reciprocating flow low porous medium superadiabatic burning temp. difference electric generating device |
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| CN101908846A (en) | 2010-12-08 |
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Address after: 100871 Peking University, 5 the Summer Palace Road, Haidian District, Peking University Patentee after: Zhang Peng Address before: Room 102, Unit 1, Building 2, Juneng District, Shengcheng Street, Shouguang City, Shandong Province Patentee before: Zhang Peng |
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