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

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...

AI Technical Summary

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 speed of the logging well, and the signal-to-noise ratio of the signal transmission will affect the detection accuracy of the above-mentioned magnetic positioning instrument.

Images