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casing string to the pressure buildup.
202 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 101 Hydrogen Sulfide
Tubulars utilized in drilling and producing
hydrocarbons containing hydrogen sulfide must be
specifically designed to withstand the corrosive
effects of the gas.
There are several factors in combination determine
the type of tubulars acceptable for use.
1. Hardness of the steel.
2. Minimum operation temperature.
3. Concentration of Hydrogen Sulfide in the flow
4. Stresses in the tubulars.
5. Exposure time.
6. The pH of the mud will effect Hydrogen Sulfide
activity(only a safety feature). Buckling
Axial loads in combination with internal and
external pressure differentials can cause
casing to buckle. Setting off casing weight on
bottom can cause buckling. Casing should be
hung in a minimum of full buoyed sting
weight. Prediction of buckling tendency for a
casing string is accomplished by comparison
of the axial tension loads and the stabilizing
forces. The cemented axial tension load is the
same evaluation used in casing design for
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- Fall '14