Method for Measuring the Shock Vibration State of Downhole Instruments While Drilling

Abstract

The invention provides a method used for measuring the impact vibration state of a downhole instrument while drilling and belongs to the field of petroleum drilling. The method includes the steps that first, a circuit substrate is arranged, at least two opened mounting grooves which are spaced are formed in the circuit substrate in the longitudinal direction, a measurement circuit is arranged in the first mounting groove, and a control and transmission circuit is arranged in the second mounting groove; second, the circuit substrate is installed in a sealed barrel, a shell and an antenna are arranged outside the sealed barrel, a drilling fluid channel is formed between the shell and the barrel, and the antenna, the shell and the sealed barrel are installed on a drill stem as downhole parts; third, after the drill stem provided with the downhole parts is lowered into a well, the measurement circuit is controlled by the control and transmission circuit at preset time to start to measure parameters, and the measurement result from the measurement circuit is received by the control and transmission circuit and then transmitted by the antenna. The method is accurate in test result and high in safety performance and integration degree.

Description

technical field [0001] The invention relates to the field of petroleum drilling, in particular to a method for measuring the shock vibration state of downhole instruments while drilling. Background technique [0002] There are various types of downhole instruments with precise structures. In the process of drilling operations, high-intensity vibrations will be generated, which will generate impact loads on downhole instruments, which may cause unsatisfactory working results of downhole instruments, and even cause damage to the instruments in severe cases. Real-time detection of the impact strength, direction and frequency of the downhole instrument and its vibration state can accurately judge the condition of the downhole instrument, and control it in time when abnormal vibration occurs to prevent damage to the instrument. At the same time, it serves as a reference for the verification of the performance of the instrument and the calibration and analysis of the measurement ...

AI Technical Summary

Problems solved by technology

Although the above devices and methods realize the real-time monitoring of the vibration state of the downhole drill bit / drill string during the drilling process, the measurement tools must be combined with MWD and other telemetry systems to send data to the ground. In the well, it is inconvenient to use; at the same time, during the drilling process, the joints of the downhole sub joints are prone to deformation and fracture, and the number of sub joints used is large, which reduces the safety of the operation

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