Chlorides + Higher Temperatures = Tough String Conditions

Understanding the effects of temperature and chlorides on metallurgy performance is critical to the selection process. Weatherford’s alloy expertise removes the burden of metallurgy decisions from the operator.

CRITICAL PITTING TEMPERATURES

Various Stainless Steel Alloys vs. Chloride Concentration from
Gibson Tube Worksheets ASTM G48 Process

Calculated PREMIN & PREMAX for Various Alloys

Based on Composition Limits in ASTM Specs

Directions

(1) Enter Y-Axis at BHT
(2) Intersect with Produced Water Chlorides
(3) Register the Point on Graph
Evaluation
If any point falls above or to right of Alloy Curve, Cap String will have Pitting Tendencies; need to
recommend corrosion treatment for Cap String. If point falls below or to left of alloy, metallurgy is sufficient to prevent chloride corrosion