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Method of determining drilling depth in real time according to operation parameters of hydraulic drilling rig

A technology for hydraulic drilling rigs and operating parameters, which is applied in the field of rockburst prevention and control, gas drainage, and water control in coal mines, can solve problems such as unreliable results, time-consuming and labor-intensive, etc. effect of influence

Active Publication Date: 2017-06-13
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0015] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a method for determining the drilling depth in real time according to the operating parameters of the hydraulic drilling rig, so as to solve the problems of time-consuming, laborious and unreliable results in the existing methods

Method used

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  • Method of determining drilling depth in real time according to operation parameters of hydraulic drilling rig
  • Method of determining drilling depth in real time according to operation parameters of hydraulic drilling rig
  • Method of determining drilling depth in real time according to operation parameters of hydraulic drilling rig

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[0066] Connect the pressure transmitter in series to the input oil circuit of the rotary motor of the hydraulic drilling rig to measure the rotation pressure of the drilling rig in real time; connect the pressure transmitter in series to the input oil circuit of the feed cylinder of the hydraulic drilling rig to measure the feed pressure of the drilling rig in real time; The rate of penetration of the drill pipe is tested using a stay-wire displacement sensor. By monitoring the drilling process of 1-2 boreholes, using figure 2 Determine the characteristic values ​​of rotational pressure, feed pressure and rate of penetration.

[0067] The running state of the drilling rig is judged by the relationship between the rotation pressure, the feed pressure and the feed rate and their eigenvalues. In particular, when there is a collapsed hole, the rotation pressure will change. At this time, the rotation pressure when feeding the drill pipe and drilling is relatively close, and it i...

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Abstract

The invention discloses a method of determining the drilling depth in real time according to operation parameters of a hydraulic drilling rig and belongs to the fields such as mine water prevention and control, rock burst prevention and control and gas extraction technologies. The rotating pressure and the feed pressure of the drilling rig are measured in real time through a pressure transmitter. The drilling speed of a drilling rod is tested through a wire-drawing displacement sensor. Then the eigenvalues of the rotating pressure, the feed pressure and the drilling speed are determined aiming at every drilling rig. In the operation process of the drilling rig, the working state (drilling, or idling, or drilling rod feeding or drilling rod withdrawing) of the drilling rig is determined according to the relationship of the parameters and the eigenvalues of the parameters. When the drilling rig is in the drilling state, the drilling speed is multiplied by drilling time, namely the drilling depth during the time is obtained, and finally the drilling depths of effective drilling time periods are accumulated, namely the real time drilling depth can be obtained. The problems that an existing method needs long time and great effort, and the result is not reliable are solved.

Description

technical field [0001] The invention relates to the technical fields of coal mine water prevention, rock burst prevention and gas drainage, in particular to a method for determining the drilling depth in real time according to the operating parameters of a hydraulic drilling rig. Background technique [0002] At present, coal is still the main energy supply of my country's economy, and a sustained and stable coal supply will be the basis for the steady development of my country's economic construction. With the mining of coal resources, the mining depth of existing coal mines is increasing year by year, and the geological conditions are becoming more and more complex. Geological disasters such as water inrush, gas outburst and rock burst occur from time to time, which seriously threaten the safe production of coal mines. At present, coal mines have taken many measures to prevent and control the above-mentioned geological disasters, among which the arrangement of drilling hol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/04E21B47/06
CPCE21B47/04E21B47/06
Inventor 张凯牛钢钢孙凯邓康宇
Owner CHINA UNIV OF MINING & TECH
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