Development of 2.5 million-lb landing string stretches limits of manufacturing capabilities

摘要

DEEP WATER AND ultra-deepwater well designs continue to drive the requirement for higher tension-capacity landing strings. Water depth and total depth are increasing, and step-outs are being extended. This, combined with the often narrow margin between pore pressure, mud weight and fracture gradient, is causing well designers to set more intermediate casing strings. In turn, that is pushing large-diameter, heavy casing strings to deeper setting depths to maintain hole size and reach the intended hydrocarbon targets.