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Figure 24 shows a general view of this load line.
177 Fig.24 Burst Design(Limited Kick) Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 178 89 The minimum backup is calculated and drawn
after the load line is established. The design
line displayed and the casing designed(Fig.25). Fig.25 Burst Design-Limited Kick Collapse Design
The collapse load for intermediated casing is
imposed by the fluid in the annular space, assumed
to be the heaviest mud weight the string is
projected to be run in and the cement used(Fig.26).
The resultant collapse loading is the backup line
subtracted form the load line(Fig.27).
Application of a collapse design factor results in the
collapse design line(Fig.28).
The collapse resistances of the sections dictated by
burst considerations should now be plotted and
checked. When the checking and necessary
upgrading are completed, the result is a design of
weights, grades, and section lengths which satisfy
the burst and collapse maximum load(Fig.29). Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 90 Fig.26 Collapse Design Fig.28 Collapse Fig.27 Collapse Design Fig.29 Collapse Co...
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