Numerical Analysis of the Stress Distribution and Concentration Factors of the Tool Joint of the Directional Drill Pipe

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Serial number</td><td class="align_center"><i>T</i><sub><i>a</i></sub></td><td class="align_center"><i>T</i><sub><i>h</i></sub> (°)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">1 : 22</td><td class="align_center">24</td></tr><tr><td class="align_left">2</td><td class="align_center">1 : 25</td><td class="align_center">29</td></tr><tr><td class="align_left">3</td><td class="align_center">1 : 30</td><td class="align_center">34</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Factor level table of orthogonal analysis.</div>

Mathematical Problems in Engineering

tab2

Table 2

Table 2: Numerical Analysis of the Stress Distribution and Concentration Factors of the Tool Joint of the Directional Drill Pipe 