Coupling magnetic-positioning well logging pup joint and high-speed telemetry well logging instrument provided with pup joint

A technology of magnetic positioning and logging tools, which is applied to boreholes/well components, measurement, drilling equipment, etc., can solve the problems of the influence of magnetic positioning instrument detection accuracy, etc., and achieve improved anti-interference performance, shortened size, and improved anti-interference performance effect

Inactive Publication Date: 2017-01-04
CNPC GREATWALL DRILLING ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, parameters such as the strength of the magnetic steel, the number of turns of the coil, the magnetic induction of the external magnetic substance, the moving spe

Method used

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  • Coupling magnetic-positioning well logging pup joint and high-speed telemetry well logging instrument provided with pup joint
  • Coupling magnetic-positioning well logging pup joint and high-speed telemetry well logging instrument provided with pup joint

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Example Embodiment

[0032] Hereinafter, the present invention will be described in detail based on the drawings.

[0033] figure 1 Is the basic structure of a magnetic positioner, figure 2 It is a schematic diagram of the working principle of the magnetic positioner. The structure of the coupling magnetic positioning logging sub-section of the present invention and figure 1 The structure of the magnetic positioner is basically the same, and the working principle is also similar.

[0034] Specifically, the coupling magnetic positioning logging sub of the present invention includes a probe part, a digital-analog circuit processing part, and a CAN bus transceiver module. The probe part includes a pair of permanent magnets with opposite magnetic poles, an iron core located between the pair of permanent magnets, and a coil wound on the iron core, such as figure 1 As shown, a pair of permanent magnets with opposite magnetic poles means that the sides of the two permanent magnets with the same polarity (th...

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Abstract

The invention provides a coupling magnetic-positioning well logging pup joint and a high-speed telemetry well logging instrument provided with the pup joint. The coupling magnetic-positioning well logging pup joint is provided with a probe part, an iron core, a coil, an analog-digital circuit processing part and a CAN bus receiving and sending module, wherein the probe part comprises a pair of permanent magnet steel with opposite magnetic poles; the iron core is located between the pair of permanent magnet steel; the coil is wound on the iron core; the analog-digital circuit processing part is used for processing a signal collected by the probe part; and the CAN bus receiving and sending module is used for sending the signal processed by the analog-digital circuit processing part to the high-speed telemetry well logging instrument through a CAN bus and receiving a signal from the high-speed telemetry well logging instrument. According to the coupling magnetic-positioning well logging pup joint and the high-speed telemetry well logging instrument provided with the pup joint, the well logging instrument is convenient to debug and high in antijamming capability, and the logging reliability and stability are improved; through the novel probe structure and the integrated processing circuit, the signal to noise ratio is increased, the overall size of the pup joint is reduced, and the capacity to accurately position casing couplings with different casing sizes and in severe well conditions of the pup joint is improved.

Description

technical field [0001] The invention belongs to the field of magnetic logging instruments in petroleum logging instruments, and in particular relates to a digital collar magnetic positioning logging nipple based on the CAN bus of a high-speed telemetry logging instrument and a high-speed telemetry nipple with the nipple The logging tool is mainly based on the electromagnetic induction method to determine the string structure of the casing and other pipes in the well, and is one of the probe parts of the rapid platform remote transmission tool. Background technique [0002] The CAN bus-based digital coupling magnetic positioning logging nipple belongs to the magnetic logging series and is one of the probe parts of the fast platform remote transmission instrument. It is mainly used to determine the pipe string structure of the entry pipe. figure 1 is the basic structure of a magnetic locator, such as figure 1 As shown, the core of the magnetic locator is a pair of permanent m...

Claims

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Application Information

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IPC IPC(8): E21B17/02E21B47/00
Inventor 朱新楷
Owner CNPC GREATWALL DRILLING ENG
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