Rotary wireless electricity energy and signal transmitting system for measurement-while-drilling instrument

Abstract

The invention discloses a rotary wireless electricity energy and signal transmitting system for a measurement-while-drilling instrument. Based on an electromagnetic coupling technique and carrier wave communication theory, the rotary wireless electricity energy and signal transmitting system is constructed at the short joint connection part of the measurement-while-drilling instrument, so that the electricity energy transmitting and information interaction among short joints are realized safely and stably, and the rotary wireless electricity energy and signal transmitting system comprises an electricity energy conversion circuit, a carrier wave communication circuit and an electromagnetic coupling mechanism; low-frequency alternating-current electricity energy generated by a mortar pulse power generator is subjected to alternating current-direct current-alternating current conversion by electricity energy conversion circuits in power supply short joints, and electricity energy is transmitted to the control short joints by the electromagnetic coupling mechanism in a non-contact mode, so that the wireless transmitting of electricity energy among short joints of the measurement-while-drilling instrument is realized; to-be-transmitted signals are modulated, demodulated, analyzed and processed by a carrier wave communication circuit, so that the wireless interaction of information among the short joints of the measurement-while-drilling instrument can be realized; the complexity of a connecting mechanism among the short joints is reduced, unsafe factors and hazards of lead type and slide ring type connecting modes are eliminated, and the stability, safety and expandability are improved.

Description

technical field [0001] The invention relates to a rotary wireless power and signal transmission system for measuring instruments while drilling, in particular to a non-contact power transmission and transmission between short sections of measuring instruments while drilling near the drill bit based on electromagnetic coupling and carrier communication technology. The signal interaction belongs to the field of oil and natural gas drilling. Background technique [0002] Oil resources are related to a country's economy, national defense and people's livelihood. The rapid economic development has led to an increasing demand for oil resources, and oil extraction has become increasingly important. With the advancement of science and technology, oil exploration and mining technologies continue to develop in the direction of automation and intelligence. [0003] Measurement-while-drilling (MWD) and logging-while-drilling (LWD) technologies are currently the key technologies in the ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the shortcomings of complex structure, poor safety and stability, etc. caused by the wire type and slip ring structure used in the short internode electric energy and signal transmission of current measuring instruments while drilling. Technol

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