CN109372480A - A kind of movable down-hole electric generating apparatus of water injection well and method - Google Patents
A kind of movable down-hole electric generating apparatus of water injection well and method Download PDFInfo
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- CN109372480A CN109372480A CN201810504266.8A CN201810504266A CN109372480A CN 109372480 A CN109372480 A CN 109372480A CN 201810504266 A CN201810504266 A CN 201810504266A CN 109372480 A CN109372480 A CN 109372480A
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- generating set
- guide way
- outer tube
- water injection
- hole
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000002347 injection Methods 0.000 title claims abstract description 38
- 239000007924 injection Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 13
- 210000002445 nipple Anatomy 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000010248 power generation Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims 2
- 230000007774 longterm Effects 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000011021 bench scale process Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B1/00—Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on blades or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- 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
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a kind of movable down-hole electric generating apparatus of water injection well and methods, wherein device includes outer tube, generating set, and the generating set is located in outer tube bore, and the outer tube inner left wall installs spring leaf, under normal conditions, generating set elasticity is extruded in inner wall on the right side of outer tube by spring leaf.The generating set includes at least one set, and the both ends of the generating set are respectively upper guide way, lower guide way.The upper guide way opens up right lower incline, and the lower guide way opens up lower-left inclined-plane.The upper guide way opens up radial upper guide way through-hole, and the lower guide way opens up radial lower guide way through-hole.Setting is radially orientated upper support bar, the lower support bar of outer tube bore on the outer tube, and wherein upper support bar is inserted into upper guide way through-hole, and lower support bar is inserted into lower guide way through-hole.Water-stop sheet is arranged in the generating set left side.The present invention can provide long-term and stable electric power supplement for downhole intelligent water injection tool.
Description
Technical field
The present invention relates to water flooding technical field, specifically a kind of movable down-hole electric generating apparatus of water injection well
And method.
Background technique
In water flooding field, seperated layer water injection has become the main means for improving waterflooding development effect, layering note
The development of water technology successively experienced four-stage, and the first stage is fixed separate zone waterflooding technology, and water nozzle is fixed, and water injection rate can not
Allotment；Second stage is movable separate zone waterflooding technology, and movable water nozzle can be tested by way of multiple pulling water nozzle
Allotment；Phase III is to survey to adjust integrated type separate zone waterflooding technology, and water nozzle is built in injection well downhole flow regulator, it is only necessary to which tripping in one plows measurement and adjustment instrument
Device can complete each layer test allotment work in underground, which is also the technology that current each elephant is mainly applied and promoted；
Fourth stage is intelligent wireless separate zone waterflooding technology, realizes that underground real-time radio is surveyed by downhole intelligent injection well downhole flow regulator and adjusts, eliminates
The cumbersome and complicated workloads such as underground dropping-fishing test allotment, realize underground real-time monitoring and dynamic adaptation, at present the technology
Still in research and development and bench-scale testing stage.
Intelligent wireless the separate zone waterflooding technology either allotment of underground real-time monitoring or data wireless transmission require long-term
Stable power supply system.It powers using from charged pool, is limited by underground bulk, battery volume and battery capacity all compare
It is small, electric circuit in well system low-power consumption is designed and proposes requirements at the higher level；Secondly, under battery-powered state, underground real-time monitoring, intelligence
Allotment and data acquire real-time transmission, can generate persistently higher energy consumption, it will the service life of extreme influence battery；Underground supplies
Battery be expendable consumed product, can not cycle charging utilize, frequently replace battery then mean huge operation, be produced into
This.Currently, energy storage battery is highly developed, and the technology that utilizes water for producing electric power is relatively mature, and water injection well in oil fields has fluid
Injection of stablizing have the source of generation driving force, therefore intelligent wireless layering can be given by water injection well underground self-powered technology
Water filling provides long-term and stable electric power safeguard.
By retrieval, application number: 200810114632.5, publication date 2012-01-11 disclose a kind of generating power downhole dress
It sets, which is arranged in downhole drill system, and wherein well system includes the drive for driving drill bit to rotate
Moving axis and the guide support rotary sleeve being set in outside drive shaft, which includes generator, which is mounted on
In space between drive shaft and guide support rotary sleeve, and there is body and armature spindle, wherein the fixed peace of the body of generator
On guide support rotary sleeve, driver is connected between the armature spindle of the generator and the drive shaft of well system
Structure, the transmission mechanism are used to the rotational power of drive shaft passing to armature spindle.Down-hole electric generating apparatus of the invention is not only able to
Powerful electric energy is provided in downhole drill system, and can be timeless in underground with the progress of drillng operation
Work.
Although disclosing some down-hole electric generating apparatus, do not sent out with the open source literature of same technique scheme of the present invention
It is existing, and multiple technical problems to be solved by this invention, the open source literature retrieved also can not all solve.It is disclosed above simultaneously
Document does not have technical inspiration to the present invention yet.
Summary of the invention
The purpose of the present invention is to provide a kind of movable down-hole electric generating apparatus of water injection well and methods, can be downhole intelligent
Water injection tool provides long-term and stable electric power supplement.Unlatching and the pass in central water flooding channel are realized using the mode of moving radially
It closes, passing through for test equipment can be met, will not influence the normal production test of water injection well.
In order to achieve the above objectives, present invention employs following technical solution, a kind of movable generating power downhole dresses of water injection well
It sets, including outer tube, generating set, the generating set is located in outer tube bore, and the outer tube inner left wall installs spring leaf,
Under normality, generating set elasticity is extruded in inner wall on the right side of outer tube by spring leaf.
The generating set includes at least one set, and the both ends of the generating set are respectively upper guide way, lower guide way.
The upper guide way opens up right lower incline, and the lower guide way opens up lower-left inclined-plane.
The upper guide way opens up radial upper guide way through-hole, and it is logical that the lower guide way opens up radial lower guide way
Hole.
Setting is radially orientated upper support bar, the lower support bar of outer tube bore on the outer tube, wherein in upper support bar insertion
In guide way through-hole, lower support bar is inserted into lower guide way through-hole.
Water-stop sheet is arranged in the generating set left side, and water-stop sheet upper end exceeds generating set and reaches on outer tube bore always
At port, the short generating set of crossing in water-stop sheet lower end is reached always at outer tube bore lower port；Spring leaf squeezes generating set elasticity
When being pressed in inner wall on the right side of outer tube, generating set center line is consistent with the lumen centers line of upper and lower connector.
The outer tube upper end connects top connection, and lower end connects lower contact.
In order to achieve the above objectives, present invention employs following technical solution, a kind of movable generating power downhole sides of water injection well
Method, generating set, which is mounted in the outer tube of underground, constitutes down-hole electric generating apparatus, and down-hole electric generating apparatus is all connected with oil pipe, generator up and down
Group is placed in the middle to the center flow channels for encapsulating pipe nipple tubing string under spring leaf thrust, oil pipe water surge generator group when water filling
Blade rotation, generating set start to work, fluid dynamic energy is converted into electric energy, supplies electricity to underground Intelligent water injection devices at different levels,
After water impact generator impellers at different levels, the downlink from annular fiowpath back flows back into water filling central passage, in the injecting process
Realize power generation in real time.
When needing tripping in test equipment, instrument gravity is on generating set on the inclined-plane of guide way, by support spring
Welt is compressed, generating set, which synchronizes to be pushed back, is moved to encapsulation pipe nipple tubing string side abutting compressed spring, reserves center mistake at this time
The channel of instrument guarantees that instrument downlink passes through, and instrument is moved radially by rear spring leaf pushing generator group to centre bit
It sets and continues to generate electricity；When above mentioning instrument, steel wire drives the inclined-plane of instrument thrust guide way under generating set, by support spring
Welt is compressed, generating set, which synchronizes to be pushed back, is moved to encapsulation pipe nipple tubing string side abutting compressed spring, reserves center mistake at this time
The channel of instrument guarantees that instrument uplink passes through.
Compared with the prior art, the invention has the following beneficial effects:
1, the characteristics of present invention passes through according to water injection well limited space, one way entrapped water, test equipment, devises a kind of movement
Formula generating power downhole technology is water injection well downhole intelligent injection allocation apparatus continued power.
2, electricity-generating method of the invention and device can make full use of water injection well water, provide maximum hydrodynamic(al) for generating set
Power guarantees that generated output reaches target requirement.
3, apparatus of the present invention can meet tester using the open and close that mode realizes central water flooding channel are moved radially
Device passes through, and will not influence the normal production test of water injection well.
4, the present invention is arranged using independent generating set, and generator can be dismantled arbitrarily, installed, be replaced, can also be multiple
It is used in series, meets the needs of different generated outputs.
5, apparatus of the present invention are simple and compact for structure, influenced small, reliable working performance by borehole size limitation, and installation is simple,
It is easy to use.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the movable down-hole electric generating apparatus of water injection well of the present invention；
Fig. 2 is extruded to the status diagram of side for generating set after tripping in instrument of the present invention；
Fig. 3 is generator unit structure schematic diagram.
In figure: top connection 1, water-stop sheet 2, upper support bar 3, spring leaf 4, outer tube 5, lower support bar 6, lower contact 7, generator
Group 8, upper guide way through-hole 9, lower guide way through-hole 10, instrument 11.
Specific embodiment
Detailed description for the present invention and technology contents, cooperation Detailed description of the invention is as follows, however attached drawing is only to refer to and say
It is bright to be used, it is not intended to limit the present invention.
According to Fig. 1, Fig. 2, Fig. 3, a kind of movable down-hole electric generating apparatus of water injection well, including outer tube 5, generating set 8, it is described
Generating set is located in outer tube bore, and the outer tube inner left wall installs spring leaf 4, and under normal conditions, spring leaf is by generating set
Elasticity is extruded in inner wall on the right side of outer tube.
The generating set includes at least one set, and the both ends of the generating set are respectively upper guide way, lower guide way.Institute
It states guide way and opens up right lower incline, the lower guide way opens up lower-left inclined-plane.The upper guide way opens up radial upper guiding
Body through-hole 9, the lower guide way open up radial lower guide way through-hole 10.
Setting is radially orientated upper support bar 3, the lower support bar 6 of outer tube bore on the outer tube, and wherein upper support bar is inserted into
In upper guide way through-hole, lower support bar is inserted into lower guide way through-hole.
Water-stop sheet 2 is arranged in the generating set left side, and water-stop sheet upper end exceeds generating set and reaches outer tube bore always
At upper port, the short generating set of crossing in water-stop sheet lower end is reached always at outer tube bore lower port；Spring leaf is elastic by generating set
When being extruded in inner wall on the right side of outer tube, generating set center line is consistent with the lumen centers line of upper and lower connector.Water-stop sheet is welded on
Generating set side stops water to enter side opening where spring leaf, and generating set can be moved radially along support rod, and support rod limits
The movement routine of generating set, spring leaf can withdraw and pop up under external force.
The outer tube upper end connects top connection 1, and lower end connects lower contact 7.
Top connection 1, upper end is connect with oil pipe, and lower end is connect with outer tube 5, and outer tube lower end is connect with lower contact 7, under lower contact
Connected pipes are held, have spring leaf 4 and generating set 8 in outer tube；After upper support bar 3, lower support bar 6 are connect with outer tube respectively, insert
Enter into guide way through-hole on generating set and lower guide way through-hole, generating set is suspended on inside center channel, water-stop sheet 2
It is blocked in inclined hole water inlet, guarantees that water enters space where generating set.
When normal water filling, oil pipe water is stopped by water-stop sheet, fully enters mainstream channel, direct surge generator impeller,
Generation driving force is provided, generating set is started to work, and fluid dynamic energy is converted into electric energy, it charges to underground energy storage battery, fluid stream
Waterflood path is back flowed back into after crossing generating set.
When needing to pass through instrument, spring-supported generating set is pushed into pipe nipple side by instrument gravity, meets instrument
By internal orifice dimension requirement, instrument above mentions instrument by rear spring leaf and hydro-generating Unit to be radially pushed into center water passage
When device, pushes hydro-generating Unit to withdraw side by instrument uplink pulling force and set, opening central passage passes through instrument.
Generating set 8 is absolute construction, can arbitrarily dismantle, installs, replace, can also multiple series connection lengthen and use, satisfaction
The demand of different generated output sizes.Waterflood path can meet passing through for test equipment, will not influence the normal production of water injection well
Test.Generating set 8 is this field conventional hydraulic generator, is the prior art, directly applies.
In short, a kind of water injection well Mobile underground power generator use moves radially mode and realizes opening for central water flooding channel
It opens and closes, passing through for test equipment can be met, will not influence the normal production test of water injection well, generator can dismantle arbitrarily,
Installation, replacement, multiple can also be used in series, meet the needs of different generated outputs.
The foregoing is merely presently preferred embodiments of the present invention, non-to limit the scope of the patents of the invention, other are with this
The equivalence changes of patent of invention spirit should all belong to the scope of the patents of the invention.
Claims (9)
1. a kind of movable down-hole electric generating apparatus of water injection well, including outer tube, generating set, which is characterized in that the generating set
In outer tube bore, the outer tube inner left wall installs spring leaf, and under normal conditions, generating set elasticity is extruded in by spring leaf
Inner wall on the right side of outer tube.
2. the movable down-hole electric generating apparatus of a kind of water injection well according to claim 1, which is characterized in that the generating set
Including at least one set, the both ends of the generating set are respectively upper guide way, lower guide way.
3. the movable down-hole electric generating apparatus of a kind of water injection well according to claim 2, which is characterized in that the upper guide way
Right lower incline is opened up, the lower guide way opens up lower-left inclined-plane.
4. the movable down-hole electric generating apparatus of a kind of water injection well according to claim 2 or 3, which is characterized in that led on described
Radial upper guide way through-hole is opened up to body, the lower guide way opens up radial lower guide way through-hole.
5. the movable down-hole electric generating apparatus of a kind of water injection well according to claim 4, which is characterized in that set on the outer tube
The upper support bar for being radially orientated outer tube bore, lower support bar are set, wherein upper support bar is inserted into upper guide way through-hole, lower support bar
It is inserted into lower guide way through-hole.
6. the movable down-hole electric generating apparatus of a kind of water injection well according to claim 4, which is characterized in that the generating set
Water-stop sheet is arranged in left side, and water-stop sheet upper end exceeds generating set and reaches always at outer tube bore upper port, and water-stop sheet lower end is short
Generating set is crossed to reach always at outer tube bore lower port；When generating set elasticity is extruded in inner wall on the right side of outer tube by spring leaf,
Generating set center line is consistent with the lumen centers line of upper and lower connector.
7. the movable down-hole electric generating apparatus of a kind of water injection well according to claim 1 or 2 or 3, which is characterized in that described outer
Pipe upper end connects top connection, and lower end connects lower contact.
8. a kind of movable generating power downhole method of water injection well, which is characterized in that generating set is mounted in the outer tube of underground and constitutes well
Lower power generator, down-hole electric generating apparatus are all connected with oil pipe up and down, and generating set is short to encapsulating between two parties under spring leaf thrust
The center flow channels for saving tubing string, the blade rotation of oil pipe water surge generator group when water filling, generating set is started to work, by fluid
Kinetic energy is converted into electric energy, supplies electricity to underground Intelligent water injection devices at different levels, after water impact generator impellers at different levels, from annular fiowpath
Middle downlink, back flows back into water filling central passage, and power generation in real time is realized in the injecting process.
9. a kind of movable generating power downhole method of water injection well according to claim 8, which is characterized in that tripping in is needed to test
When instrument, support spring on the inclined-plane of guide way, is compressed welt, generating set is synchronous on generating set by instrument gravity
It is pushed back and is moved to encapsulation pipe nipple tubing string side abutting compressed spring, reserve the channel that instrument is crossed at center at this time, guarantee under instrument
Row passes through, and instrument, which is moved radially by rear spring leaf pushing generator group to center, to be continued to generate electricity；When above mentioning instrument,
Steel wire drives the inclined-plane of instrument thrust guide way under generating set, support spring is compressed welt, generating set is synchronous
It is pushed back and is moved to encapsulation pipe nipple tubing string side abutting compressed spring, reserve the channel that instrument is crossed at center at this time, guarantee on instrument
Row passes through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504266.8A CN109372480B (en) | 2018-05-23 | 2018-05-23 | Movable underground power generation device and method for water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504266.8A CN109372480B (en) | 2018-05-23 | 2018-05-23 | Movable underground power generation device and method for water injection well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109372480A true CN109372480A (en) | 2019-02-22 |
| CN109372480B CN109372480B (en) | 2021-03-09 |
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| CN201810504266.8A Active CN109372480B (en) | 2018-05-23 | 2018-05-23 | Movable underground power generation device and method for water injection well |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318730A (en) * | 2019-06-25 | 2019-10-11 | 中国石油化工股份有限公司 | The multi-functional downhole probe testing stand of high-freedom degree |
| CN112302855A (en) * | 2020-11-02 | 2021-02-02 | 长江大学 | Underground power generation device and power generation method |
| CN113847034A (en) * | 2021-09-26 | 2021-12-28 | 内蒙古华威矿业工程有限责任公司 | Energy-saving transportation mining method for open pit coal mine |
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| CN203547709U (en) * | 2013-10-08 | 2014-04-16 | 中国石油化工股份有限公司 | Filtering type collecting flow meter |
| CN205743840U (en) * | 2016-05-16 | 2016-11-30 | 中国石油天然气股份有限公司 | A kind of automatically controlled descaler being applicable to water injection well in oil fields and scale removal tubing string thereof |
| CA2937608A1 (en) * | 2015-08-03 | 2017-02-03 | Gary Pichach | Subterranean gasification system and method |
| CN106499387A (en) * | 2016-12-21 | 2017-03-15 | 西南石油大学 | A kind of active specific retention measurement apparatus |
| CN106761455A (en) * | 2016-12-09 | 2017-05-31 | 中国石油天然气股份有限公司 | The self power generation of preset cable shaft underground and cable butting technique |
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2018
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| CN203547709U (en) * | 2013-10-08 | 2014-04-16 | 中国石油化工股份有限公司 | Filtering type collecting flow meter |
| CA2937608A1 (en) * | 2015-08-03 | 2017-02-03 | Gary Pichach | Subterranean gasification system and method |
| CN205743840U (en) * | 2016-05-16 | 2016-11-30 | 中国石油天然气股份有限公司 | A kind of automatically controlled descaler being applicable to water injection well in oil fields and scale removal tubing string thereof |
| CN106761455A (en) * | 2016-12-09 | 2017-05-31 | 中国石油天然气股份有限公司 | The self power generation of preset cable shaft underground and cable butting technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110318730A (en) * | 2019-06-25 | 2019-10-11 | 中国石油化工股份有限公司 | The multi-functional downhole probe testing stand of high-freedom degree |
| CN112302855A (en) * | 2020-11-02 | 2021-02-02 | 长江大学 | Underground power generation device and power generation method |
| CN112302855B (en) * | 2020-11-02 | 2022-02-15 | 长江大学 | Underground power generation device and power generation method |
| CN113847034A (en) * | 2021-09-26 | 2021-12-28 | 内蒙古华威矿业工程有限责任公司 | Energy-saving transportation mining method for open pit coal mine |
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| CN109372480B (en) | 2021-03-09 |
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