Device for underground electric energy and signal transmission
A technology of signal transmission and electric energy, applied in the direction of output power conversion devices, circuit devices, electrical components, etc., can solve problems such as delays in work progress, failure, large maintenance and replacement costs, etc., to improve stability, improve operating efficiency, Effect of reducing system operation cost
Pending Publication Date: 2021-12-28
BEIJING LIUHE GREATNESS TECH
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Problems solved by technology
[0002] Oilfield downhole equipment usually uses contact slip rings to supply power downhole. Since the central drill pipe in the drilling is constantly rotating, after a period of use, the slip rings will be out of contact due to wear and tear, resulting in failure, unable to continue to supply power to the load, and the slip rings need to be replaced frequently. ring, delaying work progress and requiring substantial repair and replacement costs
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 As shown, a device for downhole power and signal transmission according to an embodiment of the present invention includes a power transmission circuit and a signal transmission circuit, and the power transmission circuit includes a three-phase AC generator, a rectification filter circuit, a DC-DC switching power supply, The power main control circuit, the inverter, and the first non-contact transformer, the three-phase AC generator, the rectification filter circuit, the DC-DC switching power supply, the power main control circuit, and the inverter are connected in sequence, and the first non-contact transformer is respectively It is connected with the rectification and filtering circuit and the inverter; the signal transmission circuit includes a second non-contact transformer, a down-mixing circuit, a frequency discr...
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The invention belongs to the technical field of downhole instruments in the petroleum field, and relates to a device for downhole electric energy and signal transmission. The device for underground electric energy and signal transmission comprises an electric energy transmission circuit and a signal transmission circuit, and the electric energy transmission circuit comprises a three-phase alternating current generator, a rectification filter circuit, a DC-DC switching power supply, an electric energy master control circuit, an inverter and a first non-contact transformer; the signal transmission circuit comprises a second non-contact transformer, a lower frequency mixing circuit, a frequency discrimination circuit, a signal master control circuit, a modulation signal generation circuit, a baseband signal generation circuit, a frequency mixing circuit and a driving circuit. According to the device for underground electric energy and signal transmission, the stability, safety and expandability of an underground equipment system can be improved, the operation cost of the system is reduced, and the operation efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of downhole instruments in the petroleum field, and relates to a device for downhole electric energy and signal transmission. Background technique [0002] Oilfield downhole equipment usually uses contact slip rings to supply power downhole. Since the central drill pipe in the drilling is constantly rotating, after a period of use, the slip rings will be out of contact due to wear and tear, resulting in failure, unable to continue to supply power to the load, and the slip rings need to be replaced frequently. ring, delaying work progress and requiring substantial repair and replacement costs. Therefore, the wireless transmission and supply of electric energy is an important content and direction of research in the field. The integration of wireless transmission of electric energy in measurement while drilling (MWD), rotary steerable system (RSS) and vertical drilling system is different from traditional cont...
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IPC IPC(8): H02J50/20H02J50/80H02M5/458
CPCH02J50/20H02J50/80H02M5/4585
Inventor 吴天明刘畅贾祎涵
Owner BEIJING LIUHE GREATNESS TECH