Unformatted text preview: tic
Ys( A − B )
− C For P110, A=3.18,B=0.082, C=2855
and Collapse(Worn) = 5951 psi
Collapse(Unworn)= 7932 psi
Difference = -25% Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 111 Tensile Strength
Casing wear is concentrated at a contact point and is in the
shape of a crescent in the pipe wall. The wear is nonuniform and actually removes a minimal amount of metal.
The cross sectional area of the casing is only minimally
reduced by even a high degree of wear. Fig.42 Temperature Effect on Yield Strength
As temperature varies from 0 ℉ to the
melting point of tubular steel(2700℉), the
yield strength of the tubular is seen to be
reduced to zero.This reduction is not exactly
linear, nor is it the same for all steel alloys.
The steel mills and numerous operations
have researched this phenomena and found
the strength reduction as a function of
temperature to vary as shown in Fig.43. Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 112 Fig.43 (Should be Fig.50, Pg.54) 225 Vorenkamp Backup For Burs...
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- Fall '14
- Boyun Guo, Ali Ghalambor