8 151 fig8 copyrightc 2005 by ali ghalambor boyun guo

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Unformatted text preview: to drop completely out of the casing string. If it can ever happen, maximum load concept requires that it be designed for. Therefore with on backup to subtract from the load, the load line becomes the resultant also(Fig.8). 151 Fig.8 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 152 76 A collapse design factor(CDF), like the previously discussed BDF, is applied to incorporate wear considerations into the design and the design line is generated(Fig.9) Fig.10 shows a common occurrence, section2 and 3 have collapse strengths which are sufficient but the collapse strength for section1 truncates on the collapse design line. If only 3 sections are to be used, section 1 must be replaced with another section which will satisfy the collapse requirement. 153 Fig.9 Collapse Design Fig.10 Collapse Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 154 77 If no restriction is placed on the number of sections to be used, the bottom portion of section 1 must be upgraded. This is what is illustrated in Fig.11a and Fig.11b. Notice that the burst design is also upgraded to reflect the pres...
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This document was uploaded on 03/28/2014.

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