A drilling apparatus having in-line extending wings and driving method thereof

Abstract

The present invention relates to a borehole drilling apparatus with in-line extending wings and driving method thereof. The drilling apparatus comprises a guide device rotating while moving upwardly and downwardly in a casing to fit into aborehole, extending wings for extending the diameter of adriUedhole, the pilot bit linking the lower portion of the guide deviceto strike the bottom of the borehole, wherein spiral projections formed at a lower surface of the guide device slidably engage with guide grooves formed at a side of the extending wings to each other, and a window is formed at a side of the pilot bit for advancing and retracting the extending wings so that they can spread and return linearly from the center of the pilot bit.

Description

technical field [0001] The invention relates to an exploratory drilling device with in-line spreading wings and a driving method thereof. In more detail, it relates to an exploratory drilling device with an in-line expansion wing configured to propel and Back-off to expand the diameter of the sounding hole to prevent accumulation of sludge in the space returned by the expansion wing, and its driving method. Background technique [0002] Generally, a hammer bit (Hammer bit) device used when drilling a borehole includes a rotary device, a percussion device and a drilling device. The present invention relates to a drilling device located at the lowest part of a hammer drill apparatus. Drilling devices are classified into eccentric type, expanding type and blade expanding type according to the means for expanding the probe hole diameter such as a reamer or expanding blade or arms structure. [0003] As in US Patent No. 4,770,259 (published on September 13, 1988), the eccentri...

AI Technical Summary

Problems solved by technology

[0006] However, compared to the eccentric type drilling device, since the reamer rotates eccentrically, the drilling operation cannot be performed quickly, and there is a problem that the connecting part of the middle part is easily damaged under a high load.

In addition, compared to the extended drilling device, since the extended blade is extended to have angular movement relative to the same length direction, it cannot be used under high loads, and the fixing pin is prone to breakage

[0007] Then, compared with the eccentric type or the expansion type drilling device, although the blade expansion type can be used for a high-load drilling device, there is a problem that the contact portion between the arm and the pilot bit is prone to severe wear, so the driver's Rotational forces force the arm to deploy while rotating the pilot bit through the arm, and the retaining pins holding the arm are often broken

In addition, when the arm is returned to its original position after the work of retaining the drill bit is completed, sludge tends to accumulate in the space where the arm returns, which hinders the return of the arm to its original position, so that the drilling device cannot be taken out from the drilling casing.

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