Seismic-while-drilling vibration signal acquisition system

Abstract

The invention relates to a seismic-while-drilling drill bit vibration signal measurement system which can meet the application requirements of seismic-while-drilling engineering. The system comprises a drill bit vibration signal acquisition part, a drill bit vibration signal transmission part and a drill bit vibration signal processing part. The drill bit vibration signal acquisition part adopts an independent drill bit vibration signal acquisition sub. Drill bit vibration signal processing is performed by a computer in which drill bit vibration signal acquisition and analysis software is pre-installed. Transmission between the drill bit vibration signal acquisition sub and the computer is realized through a wireless local area network. The drill bit vibration signal acquisition sub is provided with a sensor chamber, a battery chamber, a circuit board chamber and a wireless module chamber in advance on the outer circumference of the middle part of the sub, wherein the sensor is a three-component accelerometer; circuits of a circuit board comprise circuits for filtering and conditioning, signal amplification, A/D (Analog-to-Digital) modulation, digital filtering, a microprocessor, a real-time clock, D/A (Digital-to-Analog) testing, a memory and a GPS (Global Positioning System). The seismic-while-drilling drill bit vibration signal measurement system has the advantages that since a method of rigidly connecting with a drill stem is adopted, the signal quality is good, the construction is convenient to perform and the drilling construction safety is guaranteed.

Description

technical field [0001] The invention relates to a seismic drill bit vibration signal measurement system propagating along a drill string in the field of petroleum drilling engineering devices, and is particularly suitable for collecting, transmitting and processing downhole drill bit vibration signals in the seismic while drilling. Background technique [0002] Seismic while drilling is a new in-hole seismic method developed abroad in recent years. In the process of oil drilling, the vibration generated when the drill bit breaks the rock is used as the underground seismic source. It is a technology to evaluate the formation characteristics after the drill bit signals collected on the survey line are processed in various ways. Seismic while drilling can determine the position of the drill bit on the surface seismic time section in real time, and can predict the formation pressure in front of the drill bit in real time, so as to assist drilling safety decision-making and optim...

AI Technical Summary

Problems solved by technology

During the drilling process, due to the swing of the hose, the signal cable is easily torn off. Due to the relationship between the installation position, the quality of the collected signal is poor, which will eventually affect the accuracy of the entire measurement result.

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