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A dual-resonance near-bit signal short transmission system

A dual-resonance, near-bit technology, applied in earthwork drilling, measurement, wellbore/well components, etc., can solve problems such as inability to ensure high-efficiency transmission of near-drilling signals, and achieve simple structure, convenient disassembly and assembly, and high economic benefits Effect

Active Publication Date: 2021-12-31
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

As well as the complex and changeable downhole environment, the existing technology cannot guarantee the technical problem of high-efficiency transmission of near-drilling signals

Method used

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  • A dual-resonance near-bit signal short transmission system
  • A dual-resonance near-bit signal short transmission system
  • A dual-resonance near-bit signal short transmission system

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specific Embodiment

[0057] This implementation will specifically describe the specific implementation technical process and components of each subsystem of the dual-resonance near-drill bit signal short transmission system.

[0058] Specifically, as figure 2 As shown: the first resonant coupling sub-section 7 integrates a downhole sensor array, a first signal modulation module 74, a first signal demodulation module 75, a first driving module 72, a first control module 73, and a first axial magnetic field Resonance coupling coil, protection circuit module, first power supply module 71, first resonance compensation module 76, second resonance compensation module 77, etc., the first resonance coupling sub-section 7 is installed near the drill bit 1; the first signal modulation module 74 is used for collecting Filter, amplify, and modulate data information such as pressure and temperature at the drill bit 1; generate a corresponding sinusoidal signal through the modulated signal through the first dr...

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Abstract

The invention discloses a dual-resonance short signal transmission system near the drill bit, comprising: a drill bit, a screw assembly, a first resonant coupling sub, a second resonant coupling sub and an adaptive frequency modulation unit; one end of the first resonant coupling sub is connected to the One end of the screw assembly is connected; the other end of the first resonant coupling sub is connected to the drill bit; the first resonant coupling sub includes the first axial magnetic resonance coupling coil; one end of the second resonant coupling sub is connected to the other end of the screw assembly; The second resonant coupling sub-section includes the second axial magnetic field resonance coupling coil; the adaptive frequency modulation unit adjusts the operating frequency of the first and second axial magnetic field resonance coupling coils to convert the information collected at the drill bit from the first axis The magnetic field resonance coupling coil passes through the screw assembly, and is coupled to the second axial magnetic field resonance coupling coil through magnetic field resonance, so as to realize non-contact short transmission across the screw assembly. The invention enhances the intensity of the transmitting and receiving magnetic fields and improves the transmission efficiency by means of bilateral magnetic field resonance.

Description

technical field [0001] The invention belongs to the technical field of near-drill bit measurement wireless short transmission technology in industries such as oil and gas wells, mines, and geological exploration, and more specifically relates to a double-resonance type near-drill bit signal short transmission system. Background technique [0002] During drilling operations in the petroleum industry, it is necessary to obtain real-time information on the temperature, pressure, geological and other parameters of the formation and the position of the drilling tool in a timely manner. The logging instrument consists of multiple sets of sensors, which are usually installed at the end of the auger pipe at a distance of 10m-35m from the drill bit. The data collected by the sensors is not accurate and real-time data at the drill bit, and the data obtained by each sensor lags behind the current information at the drill bit. In order to grasp the formation information more accurately...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/12E21B47/13E21B47/26E21B47/06
CPCE21B47/12E21B47/06
Inventor 陈庆江涛刘昶胡皓然杨思谛余沐阳李红斌
Owner HUAZHONG UNIV OF SCI & TECH
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