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Seismic-while-drilling vibration signal acquisition system

A vibration signal and while-drilling technology, which is applied to the acquisition of vibration signals of downhole drill bits, the vibration signal measurement system of seismic drill bits while drilling, transmission and processing fields, can solve the problems of poor signal quality, signal cable tearing, and affecting the accuracy of measurement results, etc. problems, to achieve the effect of convenient construction, easy extraction, and safety

Inactive Publication Date: 2014-04-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Seismic-while-drilling vibration signal acquisition system
  • Seismic-while-drilling vibration signal acquisition system
  • Seismic-while-drilling vibration signal acquisition system

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Embodiment Construction

[0018] The present invention is further described in conjunction with the accompanying drawings.

[0019] Refer to attached figure 1 , The bit vibration signal acquisition pup joint 28 is installed between the kelly 31, the drill 30, and the drill bit 29, and is connected with the kelly 31 through the upper end box, and the lower end is connected with the drill 30. refer to figure 2 , image 3 and Figure 4 , four cavities are respectively milled out on the four sides of the middle part of the short joint body 1, which are the circuit board compartment 3, the battery compartment 8, the sensor compartment 9, and the wireless module compartment 11, and the explosion-proof shells are respectively opened and placed in the four compartments middle. Among them: refer to Figure 5 The circuit board 5 is placed in the explosion-proof casing 7 of the circuit board warehouse 3, including a filter conditioning unit 33, a signal amplification unit 34, an A / D modulation unit 35, a di...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00E21B47/12
Inventor 曹忠成耿应春王爱凤于丽丽李玉红崔谦范寅聪解莉萍
Owner CHINA PETROLEUM & CHEM CORP
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