Underground power generation device and method
A technology for power generation devices and generator sets, which can be used in earth-moving drilling, engine components, wellbore/well components, etc., and can solve problems such as affecting service life.
Active Publication Date: 2021-02-02
YANGTZE UNIVERSITY
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Problems solved by technology
Impurities in the drilling fluid will wash away the blades of the turbine during the process of the drilling fluid impacting the turbine, affecting its service life, so it is necessary to improve it
Method used
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[0026] The downhole power generation device consists of an upper casing 1, a lower casing 22, a screw rotor 2, a screw stator 4, an inner motor, a bypass valve, a main shaft 3 and a generator set. The upper casing 1 is fixed with a screw stator 4, and the screw The screw rotor 2 is movably inserted in the stator 4, and the screw rotor 2 is a multi-head screw, so that when the drilling fluid flows between the screw rotor 2 and the screw stator 4, and the drilling fluid cooperates with the screw stator 4 to drive the screw rotor 2 to rotate, the screw rotor The rotation of 2 has the characteristics of low speed and high torque, which is convenient to drive the drill bit to rotate, so as to perform drilling operations. At the same time, compared with directly impacting the surface of the turbine, when the drilling fluid flows through the screw rotor 2, the impact on the screw rotor 2 is small, and It can effectively improve the service life of the screw rotor 2; the screw rotor 2 ...
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The invention relates to an underground power generation device, and belongs to the technical field of underground power generation machinery. The power generation device is composed of an upper shell, a lower shell, a screw rotor, a screw stator, an inner motor, a bypass valve, a main shaft and a generator set. The screw rotor is installed in the upper shell through the screw stator. A rotor inner hole is formed in the screw rotor, an inner motor is installed on the inner wall of the rotor inner hole, the bypass valve is installed between the inner motor and the upper shell, the main shaft isinstalled on the inner motor, and the generator set is installed on the main shaft. According to the power generation device, a rotating speed difference is formed between a stator winding and a power generation rotor through the difference between the number of threads of the screw rotor and the number of threads of an inner rotor, so that power is generated through the stator winding and the power generation rotor. A battery with a short life cycle is not used for supplying power, and a turbine is not used for generating power so that the service life can be effectively prolonged. The problem that the service life is liable to be influenced by drilling fluid when a turbine is used for power generation is solved.
Description
technical field [0001] The invention relates to an underground power generation device, which belongs to the technical field of underground power generation machinery. Background technique [0002] In the field of shale gas exploitation, with the application of rotary steerable systems more and more widely, batteries or downhole generators are commonly used to supply power to downhole equipment during the measurement-while-drilling and logging-while-drilling processes. During the use of the battery, when the service life of the battery exceeds the design service life, the battery needs to be replaced. For long-term underground operations, it is urgent to use an underground generator to supply power to the underground electrical equipment. At present, the downhole generator generally adopts the turbine generator, and its principle is: the downhole drilling fluid impinges on the turbine to drive the rotor of the generator to rotate to generate electricity. Impurities in the d...
Claims
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Login to View More IPC IPC(8): F03B13/02E21B47/12
CPCF03B13/02E21B47/12
Inventor 刘少胡周云凤
Owner YANGTZE UNIVERSITY