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Coal mine drilling depth measuring nipple and drilling depth determining method

A technology for drilling depth and sub-section measurement, which is applied in the directions of measurement, earthwork drilling, wellbore/well components, etc. It can solve the problems of large hole depth measurement error and achieve the effects of strong adaptability, accurate determination and reduced impact

Pending Publication Date: 2022-05-13
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] Aiming at the defects and insufficiencies in the prior art, the present invention provides a coal mine drilling depth measurement nipple and a method for determining the drilling depth, so as to overcome the problems existing in the prior art due to the use of artificial techniques for the measurement of the drilling depth. The technical problem of large hole depth measurement error

Method used

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  • Coal mine drilling depth measuring nipple and drilling depth determining method
  • Coal mine drilling depth measuring nipple and drilling depth determining method
  • Coal mine drilling depth measuring nipple and drilling depth determining method

Examples

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Effect test

Embodiment 1

[0058] Such as figure 1 and figure 2 As shown, this embodiment provides a coal mine drilling depth measurement pup, including a measurement pup outer tube 1, and a data acquisition unit 2, a micro control unit 3, a storage unit 4, a Wireless communication unit 5, clock synchronization unit 6 and power supply unit 7;

[0059] The data acquisition unit is connected with the 2 micro-control unit 3, and is used to collect drilling data and transmit the collected data to the micro-control unit 3, and the data acquisition unit 2 includes a triaxial accelerometer for measuring triaxial acceleration 21. A three-axis geomagnetic field sensor 22 for measuring geomagnetic components, and a three-axis gyroscope 23 for measuring three-axis angular velocity;

[0060] When drilling, the micro-control unit 3 controls the three-axis accelerometer 21, the three-axis geomagnetic field sensor 22 and the three-axis gyroscope 23 to collect data, and transmits the collected raw data to the storag...

Embodiment 2

[0072] In this example, the target coal seam to be drilled is a high gas outburst coal seam in a certain coal mine in Huaibei, which belongs to a high gas outburst mine.

[0073] Such as image 3 As shown, this embodiment discloses a method for determining the depth of a borehole, which is realized by the coal mine borehole depth measurement nipple disclosed in Embodiment 1, and includes the following steps:

[0074] Step 1, connect the data acquisition unit, the storage unit, the micro control unit and the pressure sensor through the wireless communication unit, and the acquisition unit, the storage unit, the micro control unit and the pressure sensor perform synchronous timing;

[0075] Step 2. Put the coal mine drilling depth measurement sub into the non-magnetic drill pipe and drill while drilling. During the drilling process, each time a drill pipe is added, the coal mine drilling depth measurement sub correspondingly collects and stores multiple sets of measurement data ...

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Abstract

The invention discloses a coal mine drilling depth measuring short section which comprises a measuring short section outer pipe, a data acquisition unit, a micro-control unit, a storage unit, a wireless communication unit, a clock synchronization unit and a power supply unit are arranged in the measuring short section outer pipe, and a non-magnetic drill rod is arranged in the measuring short section outer pipe in a sleeved mode. A pressure switch connected with the non-magnetic drill rod is closed, and a data acquisition unit starts to acquire data; when the drilling machine releases pressure, the pressure switch is turned on, and the data acquisition unit stops acquiring data. The invention further discloses a method for determining the drilling depth, and the method comprises the steps that the far-end server processes the received multiple sets of collected data corresponding to each drill rod to obtain the axial drilling displacement and the axial drilling speed corresponding to each drill rod; the obtained axial drilling displacement corresponding to each drill rod is judged to obtain the corresponding drilling depth of each drill rod, and finally, the corresponding drilling depths of all the drill rods are accumulated to obtain the drilling depth.

Description

technical field [0001] The invention belongs to the technical field of coal mine drilling, and relates to a coal mine drilling depth measuring nipple and a method for determining the drilling depth. Background technique [0002] During the construction of underground water exploration and coal seam gas drainage in coal mines, directional drilling or rotary drilling is usually used to realize underground drilling and exploration. In the underground drilling construction project, the drilling inclinometer device is usually used to measure and judge the drilling trajectory. The trajectory parameters include the inclination angle, azimuth angle, tool face angle and drilling depth of the drilling hole. Among them, the inclination angle, azimuth angle and tool face angle of the borehole can be measured by the borehole inclinometer, and the borehole depth measurement is one of the important factors restricting the accurate measurement of the borehole trajectory. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/04E21B47/12
CPCE21B47/04E21B47/12
Inventor 宫浩王信文石岩张军张涛王小龙
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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