Power supply control method and system for logging-while-drilling detection pipe in underground coal mine

A logging-while-drilling and power control technology, which is applied to mining equipment, mining equipment, earthwork drilling, etc., can solve the problems of discontinuous and unreliable logging data, and achieve data discontinuity, avoid invalid work, and prolong The effect of power-on time

Active Publication Date: 2020-06-05
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a method and system for controlling the power supply of logging-while-drilling probe tubes in coal mines, which solves the problem of existing logging data in the current power management system. Discontinuity, unreliability issues, and failure to address power consumption for long periods of drilling downtime

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  • Power supply control method and system for logging-while-drilling detection pipe in underground coal mine
  • Power supply control method and system for logging-while-drilling detection pipe in underground coal mine

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Embodiment 1

[0038] Such as figure 1 Shown is a flow chart of a method for controlling the power source of a logging-while-drilling probe in a coal mine disclosed in this embodiment. First, power on the LWD probe for the first time to ensure that both the inclinometer unit and the gamma detection unit are working normally, and then perform the following control process:

[0039] Monitoring the vibration of the LWD probe;

[0040] If the detected vibration is not greater than the preset vibration threshold, and the duration t1 , the gamma detection unit and the inclinometer unit of the logging carbon tube both maintain the state of the previous moment (that is, dormancy or power supply); if the duration T 1 ≤t2 , execute process A; if the duration T 2 ≤t3 , execute B process; if the vibration state lasts for t≥T 3 , Execute the C procedure.

[0041] If the monitored vibration is greater than the preset vibration threshold, the state lasts for t1 , execute C process; the vibration state ...

Embodiment 2

[0052] This embodiment discloses a coal mine logging-while-drilling probe power supply control system, and the system includes the following modules:

[0053] The vibration monitoring module is used to monitor the vibration of the LWD probe;

[0054] The state judging module is used for judging whether the vibration value of the logging-while-drilling probe is greater than the threshold and the duration is t1 , T 1 ≤t2 , T 2 ≤t3 or t≥T 3 ;

[0055] The power supply control module of the inclinometer unit and the gamma detection unit is used to determine that the vibration is not greater than the preset vibration threshold and the duration t1 When , control the inclinometer unit and the gamma detection unit to maintain the state at the previous moment,

[0056] Or according to the state judging module, it is judged that the vibration is not greater than the preset vibration threshold and the duration is T 1 ≤t2 When the power is supplied to both the control inclinometer uni...

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Abstract

The invention discloses a power supply control method and system for a logging-while-drilling detection pipe in an underground coal mine. The method comprises the following steps: monitoring the vibration of the logging-while-drilling detection pipe; if the monitored vibration is not greater than a preset vibration threshold value and the duration time t is less than T1, enabling a gamma detectionunit and an inclination detection unit of the logging-while-drilling detection pipe to keep the states of the previous moment; if the duration time t is not less than T1 and less than T2, executing aprocess A; if the duration time t is not less than T2 and less than T3, executing a process B; if the duration time t of the vibration state is not less than T3, executing a process C; if the monitored vibration is greater than the preset vibration threshold value and the duration time t is less than T1, enabling the gamma detection unit and the inclination detection unit of the logging-while-drilling detection pipe to keep the states of the previous moment; if the duration time t is not less than T3, executing the process B. The control method for the logging-while-drilling detection pipe effectively solves the problem that the power supply time of detection pipes in an existing logging-while-drilling system does not meet the actual production need because the dimensions and the capacities of batteries are limited.

Description

technical field [0001] The invention belongs to the technical field of logging-while-drilling in coal mines, and in particular relates to a method and system for controlling a power source of logging-while-drilling probes in coal mines. Background technique [0002] Logging while drilling in coal mines can be used not only to guide near-horizontal drilling, but also to evaluate complex strata. It is widely used in coal mine gas drainage, small geological anomaly detection, and water prevention and control projects. prospect. Coal mine LWD technology is to use special logging probes to measure the physical parameters of the formation around the borehole while the borehole is being drilled, and use a real-time data transmission device to transmit the measured data to the outside of the hole. These measured data are Drilling construction personnel provide a basis for accurately classifying the lithology of the drilled formation and adjusting the drilling trajectory to ensure t...

Claims

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Application Information

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IPC IPC(8): E21B47/11E21F17/18
CPCE21F17/18
Inventor 燕斌田小超蒋必辞代晨昱赵朋朋汲方林
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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