Houston contractor Parker Drilling (nyse: PKD - news - people ) has had its share of woes since building Sunkar, a barge designed to drill in the icy, shallow waters of the Caspian.
Focusing on high-margin drilling technology and tools, Duroc-Danner spun off the drill-pipe business as Grant Prideco in 2000 and sold off capital-intensive barge rig and gas-compression businesses.