CN110601440A - Power generation device, power generation module and drilling system - Google Patents
Power generation device, power generation module and drilling system Download PDFInfo
- Publication number
- CN110601440A CN110601440A CN201910789693.XA CN201910789693A CN110601440A CN 110601440 A CN110601440 A CN 110601440A CN 201910789693 A CN201910789693 A CN 201910789693A CN 110601440 A CN110601440 A CN 110601440A
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- Prior art keywords
- power generation
- coil
- assembly
- generation device
- ring
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0085—Adaptations of electric power generating means for use in boreholes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
Abstract
The invention discloses a power generation device, a power generation module and a drilling system, wherein the power generation device is an annular component; the power generation device is provided with at least one power generation assembly, the power generation assembly is sequentially and coaxially sleeved with a first power generation ring and a second power generation ring from inside to outside, and an explosion-proof shell is fixedly arranged outside the second power generation ring; the magnetic sheet is embedded in the first power generation ring, the coil is embedded outside the second power generation ring, and the explosion-proof shell rotates to drive the second power generation ring to rotate relative to the first power generation ring so as to realize magnetic cutting power generation. The invention can supply power for the sensor, the measuring device, the wireless transmitting device and the like in the drilling process, and provides a solution for the deep hole drill without the need of lifting the drill to replace a battery and the need of cable power supply.
Description
Technical Field
The invention belongs to the field of mechanical power generation. Relates to a power generation device, a power generation module and a drilling system, which are used for providing power for an in-hole drilling tool, a measuring device, a sensor and the like in the underground drilling process of a coal mine.
Background
In recent years, the directional drilling technology for deep holes under coal mines is rapidly developed and widely used in the aspects of coal gas drainage, coal mine water disaster control and the like. At the present stage, along with market demands and technical progress, the directional drilling equipment for deep holes in coal mines develops towards intellectualization, automation and informatization, and a measurement-while-drilling system, an intelligent drill bit and a drilling tool with data acquisition and transmission functions become core equipment of the directional drilling technology for deep holes. Intelligent drilling tool and measurement system rely on all kinds of sensors to gather and creep into operating mode information and stratum information, and at present, there are two kinds for the mode that bottom of hole measuring device and sensing instrument provided the electricity of stable work: the power is supplied by a storage battery arranged in the hole bottom drilling tool, and the power is supplied from an orifice through a wired cable. When adopting the battery power supply, receive drilling tool geometric dimensions restriction, the battery volume is less to battery energy storage density is generally lower under the current technology, therefore the electric energy of battery storage is limited, leads to needing to shut down many times at the directional drilling process of deep hole and carries the brill to change the battery, causes the unable continuity of operation of construction, has increased construction work volume, has reduced and has crept into the efficiency of construction, influences the engineering progress. When the wired power supply mode is adopted, a special drilling tool is needed, but the drilling tool is expensive, and the construction cost of enterprises is greatly increased. The two power supply modes can not limit the development requirements of the deep hole directional drilling technology, so that a power supply device which does not influence continuous drilling construction, can supply power continuously and stably and has low cost is urgently needed to be found.
Disclosure of Invention
The invention aims to provide a power generation device, a power generation module and a drilling system, and provides a device which is low in cost, does not need to lift a drill to replace a battery and does not need an external power supply to supply power to a drilling tool in a hole for underground deep hole drilling equipment of a coal mine.
In order to achieve the purpose, the invention adopts the technical scheme that:
in accordance with a first object of the present invention, a power generation device, said power generation device being an annular member;
the power generation device is provided with at least one power generation assembly, the power generation assembly is sequentially and coaxially sleeved with a first power generation ring and a second power generation ring from inside to outside, and an explosion-proof shell is fixedly arranged outside the second power generation ring;
the first power generation coil is embedded with a magnetic sheet, the second power generation coil is embedded with a coil,
the explosion-proof shell drives the second power generation ring to rotate relative to the first power generation ring to realize magnetic cutting power generation.
Optionally, a plurality of grooves are uniformly distributed on the inner wall of the first power generation ring, and magnetic sheets are embedded in the grooves;
a plurality of grooves are uniformly distributed on the outer wall of the second power generation ring, and the coils are wound in the grooves.
Optionally, a roller is further arranged between the first power generation ring and the second power generation ring, and the roller is limited by a retainer;
the first power generation ring, the second power generation ring, the roller, the retainer and the explosion-proof shell are all made of non-magnetic materials.
Optionally, an annular battery assembly is further arranged in electrical connection with the power generation assembly, and the battery assembly comprises a storage battery E and a rectification voltage stabilizing circuit which are electrically connected;
the explosion-proof shell is divided into two cabins, one cabin is used for placing the power generation assembly, and the other cabin is used for placing the battery assembly.
Optionally, the rectification voltage stabilizing circuit is provided with a full-bridge rectification circuit, the full-bridge rectification circuit is connected with the output end of the power generation assembly, the full-bridge rectification circuit is connected in parallel with a filter capacitor C, a voltage stabilizing diode ZD1, a transient voltage suppression diode TVS1 and a voltage stabilizing chip IC, and a resistor R is connected in series between the voltage stabilizing diode ZD1 and the transient voltage suppression diode TVS 1;
optionally, the full-bridge rectification circuit is formed by bridging a diode D1, a diode D2, a diode D3 and a diode D4,
a battery E is provided in parallel with the voltage stabilization chip IC.
Optionally, a plurality of power generation assemblies connected in series and a battery assembly electrically connected with the power generation assemblies are arranged, and the power generation assemblies and the battery assembly are arranged in the explosion-proof shell.
According to a second object of the present invention, a power generation module comprises an assembly pipe and a power generation device embedded in the assembly pipe along an axial direction, wherein the power generation device is the power generation device of the present invention.
According to a third object of the present invention, a drilling system comprises a drill bit, a drill rod and a power generation module, which are coaxially arranged, wherein the power generation module is the power generation module of the present invention.
Optionally, a measurement while drilling system and/or a downhole motor are also included.
Compared with the prior art, the invention has the advantages that:
the power generation device generates power by means of kinetic energy generated by rotation of the drilling tool in the drilling process, and does not need a special guide power generation blade or an orifice power supply cable for power supply; according to the demand electric quantity difference, can establish ties a plurality of power generation modules, the generated energy can change.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is an overall view (left) and an exploded view (right) of a power generation device of the present invention;
FIG. 2 is a transfer diagram of FIG. 1;
FIG. 3 is a diagram of a rectifying voltage regulator circuit;
FIG. 4 is a schematic diagram of a power generation module configuration of the present invention;
FIG. 5 is a schematic view of a power generation module mating structure of the present invention;
FIG. 6 is a schematic diagram of the installation of the power generation module of the present invention into a directional drilling system with non-rotating drill rods;
FIG. 7 is a schematic diagram of the installation of the power generation module of the present invention into a drill pipe rotating directional drilling system;
FIG. 8 is a schematic view of the assembly scheme of the power generation module of the present invention installed to provide power to the intelligent drilling tool;
the reference numerals in the figures denote: the device comprises a power generation device 1, a power generation assembly 11, a magnetic sheet 11a, a first power generation ring 11b, a retainer 11c, a roller 11d, a coil 11e, a second power generation ring 11f, a battery assembly 12, an explosion-proof shell 13, an assembly pipe 2, a drill bit 3, a hole bottom motor 4, a measurement while drilling system 5, a drill rod 6 and an intelligent drill rod 7.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention. In the present disclosure, unless otherwise specified, use of the directional terms "upper" and "lower" generally refer to the definition in the drawing figures of the accompanying drawings, and "inner" and "outer" refer to the inner and outer of the contours of the corresponding parts.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
With reference to fig. 1-3, the present invention provides a power plant, the power plant 1 being an annular member; the power generation device 1 is at least provided with a power generation assembly 11, the power generation assembly 11 is sequentially coaxially sleeved with a first power generation coil 11b and a second power generation coil 11f from inside to outside, and an explosion-proof shell 13 is fixedly arranged outside the second power generation coil 11 f; the magnetic sheet 11a is embedded in the first power generation coil 11b, the coil 11e is embedded outside the second power generation coil 11f, and the explosion-proof shell 13 drives the second power generation coil 11f to rotate relative to the first power generation coil 11b to realize magnetic cutting power generation. FIG. 1 is an outline view of a power generation device, which is of an annular structure, and a middle hole does not obstruct the circulation of drilling fluid. The magnetic sheet 11a mentioned in the present invention is preferably a strong magnetic sheet, such as a neodymium iron boron magnetic sheet, and the larger the magnetic field intensity is, the larger the power generation amount is. The second power generation coil 11f and the storage battery are relatively static, and the first power generation coil 11b rotates relative to the second power generation coil 11f, so that the first power generation coil 11b with the magnetic sheet 11a is positioned on the inner ring to facilitate the second power generation coil 11f to carry out current transmission and storage, and the coil 11e can be a copper coil, an air core coil, a ferrite coil, an iron core coil and the like. Meanwhile, the power generation device can generate power by utilizing kinetic energy generated by the rotation of the drilling tool in the drilling process through the matching of the explosion-proof shell 13 and the second power generation ring 11f, and does not need a specially-made guide power generation blade or an orifice power supply cable for supplying power; according to the demand electric quantity difference, can establish ties a plurality of power generation modules, the generated energy can change.
In the embodiment of the present disclosure, a plurality of grooves, preferably even number, are uniformly distributed on the inner wall of the first power generation coil 11b, and magnetic sheets 11a are embedded in the grooves; a plurality of grooves, preferably even number, are uniformly distributed on the outer wall of the second power generation coil 11f, and the coil 11e is wound in the grooves. One side of the coil 11e is adhered to the groove of the second power generation coil 11f, the thickness of the coil 11e is not more than the large diameter of the second power generation coil 11f, and the large diameter surface of the second power generation coil 11f is adhered to the inner wall of the explosion-proof shell 13. The first power generation coil 11b, the roller 11c, the roller 11d, the second power generation coil 11f and the explosion-proof shell 13 are all made of non-magnetic materials, and the influence of the magnetic materials on the magnetic sheet 11a and the coil 11e can be greatly reduced.
In the embodiment of the disclosure, a roller 11d is further arranged between the first power generation ring 11b and the second power generation ring 11f, and the roller 11d is limited by a retainer 11 c; the first power generation coil 11b, the second power generation coil 11f, the rollers 11d, the retainer 11c, and the explosion-proof housing 13 are made of a non-magnetic material, such as ceramic.
In the embodiment of the present disclosure, an annular battery assembly 12 is further disposed electrically connected to the power generation assembly 11, and the battery assembly 12 includes a storage battery E and a rectification voltage stabilizing circuit which are electrically connected; the explosion-proof case 13 is divided into two compartments, one compartment housing the power generation module 11 and the other compartment housing the battery module 12. The explosion-proof shell 13 is divided into two cabins, one cabin is used for placing a power generation module, the power generation module comprises a magnetic sheet 11a, a first power generation coil 11b, a roller 11c, a roller 11d, a coil 11e and a second power generation coil 11f, one cabin is used for placing the storage battery and the voltage stabilizing circuit module, and a hole for passing a lead is formed in the middle of the two cabins. The explosion-proof housing 13 is an explosion-proof closed structure. The explosion-proof shell 13 is fixedly connected with the drilling tool, and the drill rod 6 rotates to drive the explosion-proof shell 13 to rotate.
In the embodiment of the disclosure, the rectification voltage stabilizing circuit is provided with a full-bridge rectification circuit, the full-bridge rectification circuit is connected with the output end of the power generation assembly, the full-bridge rectification circuit is connected with a filter capacitor C, a voltage stabilizing diode ZD1, a transient voltage suppression diode TVS1 and a voltage stabilizing chip IC in parallel, and a resistor R is also connected in series between the voltage stabilizing diode ZD1 and the transient voltage suppression diode TVS 1;
in the embodiment of the present disclosure, the full-bridge rectification circuit is formed by bridging a diode D1, a diode D2, a diode D3, and a diode D4, and a battery E is provided in parallel with the voltage regulator chip IC.
The battery assembly 12 comprises a storage battery and a rectification voltage stabilizing circuit module, the whole appearance is of an annular structure, and a charging and discharging interface is arranged. As shown in fig. 4, the rectifying and voltage-stabilizing circuit includes rectifying diodes D1-D4, a smoothing capacitor C, a voltage-stabilizing diode ZD1, a transient voltage suppression diode TVS1, a resistor R, a step-up/step-down voltage-stabilizing chip IC, and a rechargeable battery E. The rectifying and voltage-stabilizing circuit converts unstable voltage into stable voltage and charges the storage battery E. The concrete implementation is as follows: the circuit input end A, B receives two poles of the power generating coil, rectifier diodes D1-D4 form a full-bridge rectifier circuit, and a filter capacitor C is connected with the full-bridge rectifier circuit in parallel; the voltage stabilizing diode ZD1 is connected with the full-bridge rectifying circuit in parallel to form a voltage stabilizing circuit; the resistor R is connected in series with the transient voltage suppression diode TVS1 and then connected in parallel with the full-bridge rectification circuit to form a transient voltage suppression circuit, so that the impact of transient pulse voltage on a subsequent circuit is prevented; the rectified circuit is connected to the step-up/step-down voltage stabilization chip IC to convert fluctuating voltage and current into constant voltage and constant current for output, and the storage battery E is connected with the step-up/step-down voltage stabilization chip IC in parallel to realize the storage of generated electric energy. The storage battery is connected with the hole bottom sensors RL1 and RL2 in parallel and provides stable voltage and current for RL1 and RL2 loads, wherein RL1 and RL2 are load indication, and the quantity and the form are not limited by the load indication.
In the embodiment of the present disclosure, a plurality of power generation modules 11 connected in series, a battery module 12 electrically connected to the power generation modules 11 are provided, and the power generation modules 11 and the battery module 12 are provided inside an explosion-proof case 13. Fig. 3 shows the power generation apparatus 1 (with a cut-away explosion-proof housing) in which a plurality of power generation modules 11 are installed in series, and a plurality of power generation modules 11 can be connected in series according to the demand of power consumption.
A power generation module comprises a mounting pipe 2 and a power generation device 1 embedded in the transfer pipe 2 along the axial direction, wherein the power generation device 1 is the power generation device 1 of the present disclosure. Fig. 5 is an effect diagram of the power generation device installed in the adaptor (the assembly pipe (adaptor) and the explosion-proof housing 13 are cut away). The assembly pipe 2 is a short drill rod, is flexible in installation position, and can be installed at any position as required. A bearing-like power generation device can be adapted to different specifications of drilling tool systems by changing the diameters of a first power generation ring 11b, rollers 11c, a second power generation ring 11f, an explosion-proof housing 13 and an assembly pipe 2.
A drilling system comprises a drill bit 3, a drill rod 6 and a power generation module which are coaxially arranged, wherein the power generation module is the power generation module disclosed by the disclosure.
In an embodiment of the present disclosure, a measurement-while-drilling system 5 and/or a downhole motor 4 are also included. Fig. 6 shows a directional drilling system with a non-rotating drill rod, the drill bit of which is driven by the hole bottom motor 4, and the drill rod is not rotated. An assembly pipe 2 containing a power generation assembly is arranged between a drill bit 3 and a hole bottom motor 4, and the assembly pipe 2 is driven by the hole bottom motor 4 to generate power. Fig. 7 shows a drill pipe rotating directional drilling system which requires a drill pipe 6 to transmit the torque of the drilling machine to a drill bit 3 and is rotated, so that the assembly pipe 2 can be installed at the front and rear ends of the measurement while drilling system 5 and directly driven by the drill pipe 6 to generate power.
Fig. 8 is a schematic diagram of a power generation device installed on a drill rod section, and the intelligent drill rod 7 with the self-diagnosis function is developed in the future, so that the problem of continuous power supply for the intelligent drill rod 7 can be solved by the invention.
The power generation device 1 of the invention has compact structure and small volume, and can be suitable for drilling tools with various apertures by designing different diameter series. All power generation facility modularization, the integration is in the catcher, and mountable in optional position also need not to carry out special repacking to former drilling tool. The drilling rod rotating and combined drilling device is suitable for a sliding drilling system with a non-rotating drilling rod and is also suitable for a drilling rod rotating/combined drilling system. The invention can continuously supply power for the sensor, the measuring device, the wireless transmitting device, the intelligent drilling tool and the like in the drilling process, and does not need to lift the drill to replace a battery or supply power by wire. The outer shape of the power generation device is a hollow annular structure, and the outer diameter of the annular structure of the bearing-like power generation device can be designed according to the specification (outer diameter/inner diameter) of the drilling tool. According to the requirement of electric quantity, a plurality of power generation modules can be installed in series in one explosion-proof shell 13.
The working principle is as follows:
in the drilling process, when the explosion-proof shell 13 is driven by the assembly pipe 2 to rotate, the explosion-proof shell 13 can drive the second power generation coil 11f fixedly adhered to the explosion-proof shell to rotate, the coil 11e wound on the second power generation coil 11f can also rotate along with the second power generation coil 11f, because the first power generation coil 11b and the second power generation coil 11f are supported by the roller 11d, the friction coefficient is small, therefore, the first power generation coil 11b and the second power generation coil 11f have a rotation speed difference, the rotation speed of the first power generation coil 11b can be slower than that of the second power generation coil 11f, the coil 11e on the second power generation coil 11f can cut the magnetic field of the magnetic sheet 11a embedded on the first power generation coil 11b to generate current, the voltage is stably amplified through a voltage stabilizing circuit in the battery assembly 12 to charge a storage battery as a power supply to supply power supplies power for devices such as a measuring system, a sensor, wireless transmission, an intelligent drilling tool and the like, and if the requirement for electric quantity is, a plurality of power generation modules may be installed together in series.
For directional drilling systems where the drill rod is not rotating, the drill bit 3 is driven by the bottom hole motor 4 since the drill rod 6 is not rotating. The assembly tube 2 containing the power generation assembly is thus mounted between the drill bit 3 and the downhole motor 4, and the assembly tube 2 is driven by the downhole motor 4 to generate power.
For a directional drilling system with a rotating drill rod, the drilling system needs the drill rod 6 to transmit the torque of a drilling machine to the drill bit 3, and the drill rod 6 is rotated, so that the assembly pipe 2 can be arranged at the front end and the rear end of the measurement while drilling system 5 and is directly driven by the drill rod 6 to generate power.
The future intelligent drill rod with self-diagnosis function is the development direction of deep hole drilling tools. The invention can solve the problem of continuous power supply for the intelligent drill rod 7.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of the various embodiments of the present disclosure can be made, and the same should be considered as the inventive content of the present disclosure, as long as the combination does not depart from the spirit of the present disclosure.
Claims (10)
1. A power generation device, characterized in that the power generation device (1) is an annular member;
the power generation device (1) is at least provided with a power generation assembly (11), the power generation assembly (11) is sequentially and coaxially sleeved with a first power generation coil (11b) and a second power generation coil (11f) from inside to outside, and an explosion-proof shell (13) is fixedly arranged outside the second power generation coil (11 f);
a magnetic sheet (11a) is embedded in the first power generation coil (11b), a coil (11e) is embedded outside the second power generation coil (11f),
the explosion-proof shell (13) drives the second power generation coil (11f) to rotate relative to the first power generation coil (11b) to realize magnetic cutting power generation.
2. The power generation device according to claim 1, wherein a plurality of grooves are uniformly distributed on the inner wall of the first power generation coil (11b), and magnetic sheets (11a) are embedded in the grooves;
a plurality of grooves are uniformly distributed on the outer wall of the second power generation ring (11f), and the coil (11e) is wound in the grooves.
3. The power generation device according to claim 1 or 2, characterized in that a roller (11d) is further arranged between the first power generation ring (11b) and the second power generation ring (11f), and the roller (11d) is limited by a retainer (11 c);
the first power generation ring (11b), the second power generation ring (11f), the roller (11d), the retainer (11c) and the explosion-proof shell (13) are all made of nonmagnetic materials.
4. The power generation device according to claim 1 or 2, characterized in that a ring-shaped battery assembly (12) is electrically connected with the power generation assembly (11), and the battery assembly (12) comprises an electric storage battery E and a rectification voltage stabilizing circuit which are electrically connected;
the explosion-proof shell (13) is divided into two cabins, one cabin is used for placing the power generation assembly (11), and the other cabin is used for placing the battery assembly (12).
5. The power generation device according to claim 4, wherein the rectifying and voltage stabilizing circuit is provided with a full-bridge rectifying circuit, the full-bridge rectifying circuit is connected with the output end of the power generation assembly, a filter capacitor C, a zener diode ZD1, a transient voltage suppression diode TVS1 and a voltage stabilizing chip IC are arranged in parallel with the full-bridge rectifying circuit, and a resistor R is connected in series between the zener diode ZD1 and the transient voltage suppression diode TVS 1.
6. The power generation device of claim 4, wherein the full-bridge rectification circuit is formed by bridging a diode D1, a diode D2, a diode D3 and a diode D4,
a battery E is provided in parallel with the voltage stabilization chip IC.
7. The power generation device according to claim 1 or 2, characterized in that a plurality of power generation modules (11) connected in series, a battery module (12) electrically connected to the power generation modules (11) are provided, and the power generation modules (11) and the battery module (12) are provided in an explosion-proof case (13).
8. A power generation module comprising an assembly pipe (2) and a power generation device (1) fitted in the assembly pipe (2) in the axial direction, wherein the power generation device (1) is the power generation device (1) according to any one of claims 1 to 7.
9. A drilling system, characterized by comprising a drill bit (3), a drill rod (6) and a power generation module, which are coaxially arranged, wherein the power generation module is the power generation module of claim 8.
10. The drilling system according to claim 9, further comprising a measurement-while-drilling system (5) and/or a downhole motor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789693.XA CN110601440B (en) | 2019-08-26 | 2019-08-26 | Power generation device, power generation module and drilling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789693.XA CN110601440B (en) | 2019-08-26 | 2019-08-26 | Power generation device, power generation module and drilling system |
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| CN110601440A true CN110601440A (en) | 2019-12-20 |
| CN110601440B CN110601440B (en) | 2022-03-15 |
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| CN201910789693.XA Active CN110601440B (en) | 2019-08-26 | 2019-08-26 | Power generation device, power generation module and drilling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114059996A (en) * | 2020-07-31 | 2022-02-18 | 沙特阿拉伯石油公司 | Self-powered active vibration and rotational speed sensor |
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| CN201291067Y (en) * | 2008-10-10 | 2009-08-19 | 刘金龙 | Spontaneous electric toy windmill |
| KR20120058757A (en) * | 2010-11-30 | 2012-06-08 | (주)아몬드테크놀로지 | Bicycle bottom bracket capable of power generation |
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| CN110601440B (en) | 2022-03-15 |
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