Down-hole instrument high-speed single-core cable transmission device

Abstract

The invention relates to a downhole instrument high-speed single-core cable transmission device used for well logging of a flowing well and a water injection well, wherein, a high-speed cable telemetry pipe nipple is connected with a releaser through a single-core plug on the upper end and connected with various parameter measurement pipe nipples through a slip ring four-core plug on the lower end; a telemetry pipe nipple circuit and a parameter pipe nipple circuit comprise singlechips which are connected with industrial buses; a telemetry pipe nipple industrial bus and a parameter measurement pipe nipple industrial bus are communicated with each other through a signal core 2 and a signal core 3 of the slip ring four-core plug; each singlechip comprises 8 address bits, 16 data bits and 255 test channels, controls a data output port to transmit serial data and a data input port to receive the serial data, and controls transmission and receipt of industrial bus data; after address comparison and coding of the received data and controlled transmission and receipt of the industrial bus data, the data is transmitted to the ground through a single-core cable; transmission rate of the cable reaches 20 K, and transmission rate of a downhole instrument reaches 40K, thereby well-logging aging is greatly improved.

Description

technical field [0001] The invention relates to a high-speed single-core cable transmission device for downhole instruments used for data communication between downhole instruments and ground instruments for logging wells of gushing wells and water injection wells. Background technique [0002] Although the existing production logging instruments used for well logging of gushing wells and water injection wells use single-chip telemetry technology, the telemetry sub and the surface instrument are connected by a single-core cable, that is, a cable bus. The telemetry sub and the parameter short The inter-sections and the short sections of each parameter are also connected through a single core, that is, the instrument bus, so the instrument is relatively long, which is not conducive to the measurement of high-pressure wells. The transmission rate of the cable bus is only 5.7292KBPS, and the data format is 20 bits. Except for 3 synchronization bits and 1 parity bit, there are on...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a downhole instrument with high reliability, high precision, high success rate, short length, which can be connected with engineering logging instrument and production layer evaluation logging instrument for self-flowing well and water injection well logging A high-speed single-core cable transmission device for downhole instruments that communicates with surface instruments to solve problems that cannot be solved by existing instruments

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