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Unformatted text preview: re at 3522ft
=14.2 ppg ×0.052 ×3522ft=2601 psi
So the effective fracture gradient form the mud flow line at
the drill ship deck to the casing seat
=(2601psi ×19.23)/(200ft+1000ft+3000ft)=11.9ppg Fig.1 Overburden Stress Gradient(psi/ft) Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 68 Well Planning 137 Section 1
“Maximum Load” Casing
Design Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 69 Design procedure
The starting point in “ Maximum Load”
casing design is an evaluation of maximum
loads pertinent to a geographical region or
geological section. It would be difficult to
list the considerations for all the possible
combinations of regions. With that in mind,
a general application to the Gulf Coast Area
will be used.
139 Surface Casing Design
The maximum burst load or surface casing is
considered the result of a kick in which the
lightest possible influx fluid blows out and replaces
the drilling fluid within the casing. The blowout is
contained and the m...
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- Fall '14