In northwestern Illinois, Albrecht says sand-and-gravel wells generally run 100' to 300' deep ... to clean the well.” A water-sample analysis conducted before well-drilling can be another ...

Typically employed in deep and ultra-deep waters, drillships work in water depths ... rigs can also drill in deep waters, drillships are able to propel themselves from well to well and location ...

Exploration well write-offs are expected to be around ... to be around $300m in the same period. "SLB secures deep-water drilling contracts from Shell" was originally created and published by ...