Signal wireless transmitting device
A technology of wireless transmitting device and signal generator, which is applied in advanced technology, construction, climate sustainability, etc. It can solve the problems of low wireless transmission rate of near-drilling short-transmission signals and limited applicable occasions, and reduce the installation cost of the device. Compared with the difficulty of going down well, reducing equipment cost and simple structure
Active Publication Date: 2021-08-17
HUAZHONG UNIV OF SCI & TECH
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[0005] Aiming at the defects of related technologies, the object of the present invention is to provide a wireless signal transmitting device, aiming at solving the problems of low wireless transmission rate of existing near-drilling short transmission signals and limited applicable occasions
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0021] Since the refractive index of the mud is much higher than that of the surrounding soil, the drill pipe coated with the drilling mud can be used as a single conductor transmission line, which can support TM surface waves. This surface wave propagates along the metal pipe, and there is no spherical wave propagation path loss, which makes it possible to transmit electromagnetic signals using...
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The invention discloses a signal wireless transmitting device, and belongs to the field of signal wireless communication. The signal wireless transmitting device comprises a signal generator, a coil type conductor, an insulating medium, a first transmission line and a second transmission line; the signal generator is cylindrical and is nested on the outer side of a drill rod; the coil type conductor comprises two sections of conductors which are circumferentially arranged on the outer side of the drill rod; the first section is a cylindrical conductor, and the second section is a solenoid-shaped conductor; the solenoid-shaped conductor comprises a plurality of turns of coils; gaps exist between the turns of coils; the insulating medium is filled between the coil type conductor and the drill rod and in each turn of coil gap of the solenoid-shaped conductor; and the signal generator is connected with the drill rod through the first transmission line and connected with the coil type conductor through the second transmission line. The structure of the transmitting device is optimized, mud-drill rod is used as a signal transmission channel, the situation that an underground device is bloated and disturbs drilling operation is avoided, the structure is simple, installation is convenient, the device installation and well descending difficulty is reduced to a certain degree, and the equipment cost is reduced.
Description
technical field [0001] The invention belongs to the field of wireless signal communication, and more particularly relates to a wireless signal transmitting device. Background technique [0002] Surface-downhole communication is a key component to realize oilfield informatization and intelligence. Since it is necessary to collect real-time near-bit data during drilling, and the drill bit is in a state of high-speed rotation during drilling, wired communication is not available. Therefore, short-distance wireless transmission of near-bit signals is the focus of current research. At present, the technologies used for data transmission of measurement while drilling mainly include mud pulse and electromagnetic wave wireless technology. [0003] The wireless transmission technology using mud pulse is relatively mature and has been widely used in production sites. There are also many manufacturers and research institutes in my country who have this technology and have the ability...
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IPC IPC(8): E21B47/13
CPCY02D30/70
Inventor 余沐阳刘昶周凯汪泽田若言陈庆李红斌
Owner HUAZHONG UNIV OF SCI & TECH