Invention Application
US20040050592A1 Male portion, drill bit and threaded joint for percussive rock drilling
有权
男性部分，钻头和螺纹接头用于冲击式岩石钻探
- Patent Title: Male portion, drill bit and threaded joint for percussive rock drilling
- Patent Title (中): 男性部分，钻头和螺纹接头用于冲击式岩石钻探
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Application No.: US10603653Application Date: 2003-06-26
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Publication No.: US20040050592A1Publication Date: 2004-03-18
- Inventor: Bo Carlstrom , Anders Brungs , Christer Lundberg , Per-Olof Liljebrand
- Applicant: SANDVIK AB.
- Applicant Address: SE SANDVIKEN
- Assignee: SANDVIK AB.
- Current Assignee: SANDVIK AB.
- Current Assignee Address: SE SANDVIKEN
- Priority: SE0201989-1 20020627
- Main IPC: E21B010/36
- IPC: E21B010/36 ; E21B017/042
Abstract:
A male portion for percussive rock drilling includes sections of reduced cross-sectional area. At least one thread for percussive rock drilling is provided at an end of the male portion. The end of the male portion comprises an abutment surface for the transfer of impact waves. The length of the portion is defined as the length of an imaginary cylinder from a plane of the impact surface to a point where the plane ceases to contact a crest of the thread, wherein the length divided by the external diameter of the cylinder lies within a range of 1-2.
Public/Granted literature
- US07185721B2 Male portion, drill bit and threaded joint for percussive rock drilling Public/Granted day:2007-03-06
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