Percussive drill bit for rock drilling and method for the manufacture of such drill bit

A technology of percussion drill bit and rock drill is applied in the field of impact drill bit used for rock drilling and used for manufacturing the drill bit, which can solve the problems of complex, expensive and difficult to operate drilling equipment as a whole.

Inactive Publication Date: 2013-07-17
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of control is that the drilling rig as a whole becomes complex, expensive and difficult to operate

Method used

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  • Percussive drill bit for rock drilling and method for the manufacture of such drill bit
  • Percussive drill bit for rock drilling and method for the manufacture of such drill bit
  • Percussive drill bit for rock drilling and method for the manufacture of such drill bit

Examples

Experimental program
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Embodiment Construction

[0014] In the drawings, 1 roughly represents a drill bit manufactured according to the present invention (see image 3 with 4 ), the drill bit 1 is used to couple with the drill rod 2 included in the drill string. in figure 1 with figure 2 It can be seen that the drill bit 1 is manufactured by assembling two parts, the front part 3 and the rear part 4 together. In these two parts 3 and 4, the front part is made into a traditional drill. Thus, the portion 3 includes a front head 5 and a tubular skirt 6 extending from the head 5 to the annular rear end 7. The front part 3 has a rotationally symmetric basic shape by including a rotationally symmetrical envelope surface composed of a tapered surface 8 on the outside of the front head 5 and a cylindrical surface 9 on the outside of the skirt 6. The tapered surface 8 converges in the rearward direction from the circular dividing line 10, and the tapered surface transforms into the front surface 11 along the circular dividing line 1...

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PUM

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Abstract

A drill bit for percussive rock drilling of the type that comprises a front head and a tubular skirt, which extends rearward from the head to a rear, ring-shaped end and includes an internal thread for the transfer of combined impact and rotary motions to the drill bit is disclosed. The rear end of the skirt is, via an unelastic joint, e.g., a friction weld, united to a front end of a sleeve having an envelope surface, from which a plurality of projections are peripherically spaced-apart from each other project, e.g., ridges, having the purpose of guiding the drill bit in the drill hole. By assembling the drill bit of two parts, the internal thread can be turned with high accuracy and smoothness, at the same time as the drill bit is given an inherent good controllability. In an additional aspect, a method for the manufacture of such a drill bit is also disclosed.

Description

Technical field [0001] In a first aspect, the present invention relates to a percussion drill bit for percussion rock drilling, which includes a front head and a tubular skirt, the tubular skirt extends from the front head to the annular rear end and includes internal threads to The drill bit transmits a combined movement of impact and rotation, the front head includes a rotationally symmetrical envelope surface, and the drill chip discharge part is buried in the envelope surface and defines the maximum outer diameter of the drill bit. [0002] Furthermore, the invention relates to a method of manufacturing a drill of the type described. Background technique [0003] In order to drill deep holes in rocks or formations, a drill string is used. The drill string includes a plurality of rods and coupling sleeves. The drill rods and sleeves are assembled as the drilling depth increases. A land machine with a shank adapter has the purpose of transmitting the combined motion of impact an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/36
CPCE21B10/36Y10T29/49826
Inventor 彼德·纳瓦
Owner SANDVIK INTELLECTUAL PROPERTY AB
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