Rock drilling tool

A drilling tool and rock formation technology, which is applied to drilling tool accessories, drill bits, twist drills, etc., can solve the problems of increasing the frictional resistance of drilling holes and reducing the volume of chip removal grooves for output drilling cuttings, so as to improve the conveying performance and reduce the The effect of friction loss

Inactive Publication Date: 2006-09-13
HAWERA PROBST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that a large ridge width increases the frictional resistance in the drill hole and reduces the volume of the chip flute for the discharge of drill chips

Method used

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Embodiment Construction

[0017] The exemplary embodiment shown in FIG. 1 constitutes the basic form of the invention. Here, the basic inventive principle of arranging primary ribs and secondary ribs is implemented in such a way that several individual chip flute sections are formed in an existing chip flute 7, said individual sections forming Their own additional cuttings conveying surface. Embodiments that vary from this basic type are shown in FIGS. 2 to 13 .

[0018] The rock formation drilling tool 1 shown in Fig. 1 comprises a drill bit 2, and it is preferably arranged on a carbide cutting blade 3 of end portion; A screw rod 4, it has a delivery screw 5; Clamping rod 6 for inserting the drill into a drive mechanism.

[0019] In the exemplary embodiment shown in Figure 1, the screw conveying rod has a pitch height of h 1 The single-head spiral, which forms a helical flute 7 around, and its height is h 2 , its two sides are surrounded by the same helically extended ribs 8 . rib height h 3 The...

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Abstract

Disclosed is a drilling tool, more particularly a rock drilling tool (1), for rotational and/or percussive drilling. In order to improve the drilling characteristics of said tool, the bore dust removal groove (7) is subdivided into at least two removal groove segments. Each segment comprises a bore dust support surface. As shown in the figure, a so-called side rod (13) is located inside the removal groove (7). Said side rod (13) basically represents a reduced embodiment of the main rod (8). The removal groove (7) with height h2 is subdivided by height h4 and a top groove segment (15) with height h5. The rod height of the side rod (13) is identified with h8. The outer back surface of the side rod (13) is defined by reference number (22). The external diameter of the outer back surface (22) is identified with d3.

Description

technical field [0001] The invention relates to a rock drilling tool. Background technique [0002] Formation drilling tools include: a drill bit, where a carbide cutting blade is usually located; a single or multiple helical delivery screw adjacent to the bit; The tool is fixed on a drilling rig. In rock formation drilling tools, the main function of the conveying screw is to convey the material scraped off by the carbide cutting edge, that is, drill cuttings or rock powder, to the outside of the borehole. Therefore, the size of the chip flute, that is, the size of the effective conveying section, is crucial to the performance of the drilling tool. Scratching and damage due to sticking, overheating or other failures of the drill occurs in the borehole. The good conveying performance of the chip flute can also prolong the working life of the drilling tool. [0003] In addition, the conveying screw must also meet the requirements of the rigid guiding performance of the dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/44
CPCE21B10/445B23B51/02B23B2226/75B23B2251/406B23B2251/50
Inventor 马斯亚斯·福斯托马斯·瓦格格伯恩哈德·莫瑟
Owner HAWERA PROBST
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