Oil pipe and casing pipe comprehensive flaw detection system

Abstract

The invention relates to an oil pipe and casing pipe comprehensive flaw detection system (MultiCIS). The downhole flaw detection system is a downhole instrument set formed by connecting a plurality of flaw detection instruments and auxiliary instruments in series up and down. The downhole instrument set is mainly composed of a rotary short section, a transmission short section, a platinum resistance thermometer, a gamma instrument, a casing pipe collar positioning instrument, centering devices, a multi-arm caliper device, an electromagnetic thickness meter, the electromagnetic flaw detectors, a storage type downhole camera and a noise meter, wherein the multi-arm caliper device mainly refers to a 24-arm caliper device or a 40-arm caliper device or a 60-arm caliper device. The instrument at the uppermost end of the downhole instrument set is connected with a cable head, and signals transmitted out by the instruments in the downhole instrument set are transmitted to a ground data acquisition system through the production logging transmission short section by means of a cable. According to the downhole flaw detection system, after being connected, the downhole instrument set comprising the flaw detection instruments is released into a well at a time so as to comprehensively detect an oil pipe and a casing pipe, multiple sets of logging data are obtained through one-time logging, mutual complementation and verification can be conducted between the obtained logging data, and operation efficiency and reliability are greatly improved. Comprehensive assessment can be conducted on oil pipe and casing pipe flaw detection.

Description

technical field [0001] The invention relates to a comprehensive flaw detection method for tubing and casing, which belongs to the technical field of damage detection for tubing and casing in oil field production systems. Positioner (CCL-P), multi-arm caliper (MFI), electromagnetic thickness gauge (MCI), electromagnetic flaw detector (MTT), downhole camera (DHC-M), etc. , pipe wall thickness changes, and detection and calculation of images inside the pipe to realize comprehensive flaw detection of tubing and casing. The tubing and casing comprehensive flaw detection method has the characteristics of comprehensive detection, mutual complementation, and multiple (group) logging data obtained in one logging, which provides a more reliable data analysis basis for logging interpretation, has great practicability, and is easy to popularize . Background technique [0002] With the increase of service life, most of the tubing and casing put into production in the oil field are dama...

AI Technical Summary

Problems solved by technology

Due to the singleness of detection methods and functions, the current instruments used for tubing and casing damage detection can only detect the damage of a single pipe, and the measured data is single, which cannot fully reflect the situation of tubing and casing; It needs to be established on the premise of taking out the oil pipe, and with the increase of the detection time, the detection cost will also increase

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