Multifunctional shaft detection device and detection method

Abstract

The invention provides a multifunctional shaft detection device and a detection method. An external multifunctional shaft detection device of the multifunctional shaft detection device emits detectionwaves to an underground shaft, and receives detection data after the detection waves pass through the underground shaft and are reflected to ground, and determines whether the detection data achievesa shaft detection effect. When the detection data of the external multifunctional shaft detection device cannot achieve the shaft detection effect, the external multifunctional shaft detection deviceemits multistage detection waves to the underground shaft, and an internal multifunctional shaft detection device receives the multistage detection waves and detects the shaft, and detection data istransmitted to the external multifunctional shaft detection device, and the external multifunctional shaft detection device determines whether the detection data achieves the shaft detection effect. The multifunctional shaft detection device and the detection method are wide in detection application range, comprehensive in evaluation indexes, and shorten detection time and improve detection, and greatly reduce oilfield development cost.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a multifunctional wellbore detection device and a detection method. Background technique [0002] At present, oilfields at home and abroad have been developed in different periods, and the number of faulty wells and casing damaged wells is increasing, and the integrity of the wellbore is continuously damaged, which affects the development effect of the oilfield. As the development time increases, the problems caused by the integrity of the wellbore become more and more prominent. Due to the failure of the wellbore, the function of the wellbore is lost, which increases the difficulty of well control. Once an accident occurs, the consequences will be catastrophic, the economic loss will be large, and it will be difficult or impossible to recover in a short time recover. Due to the influence of drilling, completion and production environment, there are many potential s...

AI Technical Summary

Problems solved by technology

Therefore, rejuvenating the wellbore becomes an effective way to double the energy efficiency, and re-understanding, rationally developing and fully excavating and utilizing old, old, bad oil, gas, water and other mineral wellbores is a technical problem that needs to be solved urgently in the oil and gas field. At present, mature wellbore detection technologies at home and abroad mainly include caliper series, magnetic logging series, acoustic imaging logging series, downhole TV imaging logging series and other methods. The disadvantage of the mechanical caliper series method is that the caliper with fewer Borehole requirements are low and the success rate is high, but the error is relatively large; the multi-arm caliper has high precision, but it has high requirements on the borehole and is easy to jam; the obtained downhole information is limited, and it can only detect inner wall corrosion defects, which cannot be determined The degree of corrosion outside the wellbore; the accuracy is low, and the measurement is affected by the wax and dirt in the pipe string, so the wellbore condition cannot be fully detected

Therefore, each method has its own limitations. Usually, a variety of methods are used to comprehensively interpret logging data in order to eliminate influencing factors, but this is time-consuming and laborious. In order to save construction time, reduce labor The purpose of one-sidedness and multi-solution. At present, the detection instrument is developing towards high efficiency and high precision. The products independently developed in the field of wellbore non-destructive testing at home and abroad can detect defects, but quantitative analysis is difficult, so a comprehensive method is needed. , multifunctional wellbore detection device and detection method

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