发明名称 |
RELEASE ASSEMBLY AND METHOD OF FORMING DRILLING TOOL |
摘要 |
<p>The invention relates to a release assembly and a method of forming a drilling tool for rock or overburden drilling. The release assembly (18) is arranged axially between two drilling tool components (14a, 14b). The release assembly comprises a release mechanism allowing an initial axial length (L1) to shorten (Ls) when a joint (15) of the drilling tool components (14) provided with connecting threads (20, 21) is turned in an opening direction (Ro). Then the release assembly has a decreased second axial length (L2) and friction forces in the joint decrease. (Figure 3)</p> |
申请公布号 |
CA2864379(A1) |
申请公布日期 |
2015.04.30 |
申请号 |
CA20142864379 |
申请日期 |
2014.09.22 |
申请人 |
SANDVIK MINING AND CONSTRUCTION OY |
发明人 |
ESKO, MAURI;KESKINIVA, MARKKU |
分类号 |
E21B23/00;E21B6/00 |
主分类号 |
E21B23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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