High-precision and long-distance depth detecting device and method for drill hole by adopting inertia pressure wave

Abstract

The invention discloses a high-precision and long-distance depth detecting device and method for a drill hole by adopting an inertia pressure wave. The device comprises two parts, namely, a drill hole opening blocking silica gel pad and a drill hole opening striking rubber disc, wherein the drill hole opening blocking silica gel pad comprises an opening (1), a hollow silica gel blocking ring (2), and a silica gel plate (3); the silica gel plate (3) is a square plate with certain thickness; the circular opening (1) is positioned in the center position of the silica gel (3); the annular hollow silica gel blocking ring (2) is arranged on the periphery of the opening (1); a bulge slightly higher than the plane of the silica gel plate (3) is arranged on the hollow silica gel blocking ring (2); the drill hole opening striking rubber disc is a circular cover-shaped object. The method for detecting the depth of the drill hole, provided by the invention, comprises the following steps: a drill hole opening blocked by the drill hole opening blocking silica gel pad is struck by the drill hole opening striking rubber disc to generate an inertia air pressure shock wave, and the drill hole depth can be computed through recording and treating a return wave of the inertia pressure wave. The method for detecting the drill hole depth is simple, convenient and fast, the detecting distance is long, and the precision reaching the centimeter-level is greatly superior to the detecting precision in the prior art.

Description

Technical field [0001] The invention belongs to the technical field of echo ranging, and relates to a high-precision long-distance inertial pressure wave drilling depth sounding device and method. Background technique [0002] In order to control the working face gas in the coal mine, it is necessary to drill gas drainage boreholes; to detect and release water, it is necessary to drill water release boreholes. Whether the depth of the borehole meets the design requirements is very critical for safe production. In addition, in oil fields, knowing the depth of oil wells is an important basis for ensuring the safe and efficient operation of pumping units. At this time, a quick and accurate method of measuring the depth of the borehole or knowing the depth of the liquid level in the borehole is needed to verify the depth of the borehole. [0003] There are currently three methods for measuring the drilling depth. One is to tap the tail of the drill pipe in the drill hole to excite th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-precision long-distance inertial air pressure wave drilling depth measurement device and method for the shortcomings of the existing methods for measuring the depth of boreholes, so as to solve the problem that the measurement depends on the drill pipe and cannot measure the depth of the open hole, or Open hole measurement depth is limited, precision is limited, and measurement is troublesome

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