Drill bit

A technology of auger bit and drill pipe, which is applied to drill bits, drilling equipment, earthwork drilling and other directions, can solve problems such as wear and tear of auger bits, and achieve the effects of low cost, good center alignment function and favorable price.

Inactive Publication Date: 2007-10-31
BAUER MASCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Auger bits are subject to significant wear and therefore require frequent replacement

Method used

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Embodiment Construction

[0024] The embodiment of the inventive auger bit 10 according to FIGS. 1 to 4 comprises a tube base 18 having one end close to a base plate 20 . A cylindrical central element 16 is arranged coaxially to the central or drilling axis 14 on a planar base plate 20 , wherein the cylindrical central element 16 is flattened at its free end.

[0025] To form the cutting spiral, two curved plates 12 are placed on the base plate 20 , on the central element 16 . The two curved plates 12 have a trapezoidal profile, as can be seen more clearly in FIG. 3 . In the present embodiment, the curved plate 12 is cut from the tube as a quarter-arc-shaped segment, which enables a particularly cheap and stable plate 12 design.

[0026] On the central element 16 , the plate 12 has an axial height corresponding to the length of said central element 16 . The height of the plate decreases radially outwards to form the desired sharp shape. The edge of the plate 12 forming the cutting edge runs generall...

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PUM

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Abstract

The tip of a soil boring drill has at least two curved plates, extending radially outwards from the drill axis with a decreasing axial height radially outwards.

Description

technical field [0001] The invention relates to an auger bit for an earth-boring auger or earth auger. Background technique [0002] Such an auger bit is known, for example, from EP1580397A1. Auger bits are subject to significant wear and therefore require frequent replacement. There are also drilling processes in which it is intended to keep the auger bit in the ground. In such a so-called abandoned auger drilling method, when the desired drilling depth is reached, it is disengaged from the drill rod, so that the hardenable suspension used for installing or establishing the drilling string can be removed from the latter stick out. [0003] It would therefore be beneficial to construct such an auger bit as cheaply as possible, yet still function well, as is necessary for free-running subterranean drilling. To this end, EP1580397A1 discloses an auger bit made of a simple metal sheet. Contents of the invention [0004] The object of the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/44
CPCE21B10/42E21B10/44
Inventor E·斯托特泽
Owner BAUER MASCH GMBH
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