Rigs_and_VesselsEni hunts down a fourth rig for duties offshore AngolaItalian player already has three rigs working in block 15/06, but needs a fourth unit in AngolaRig query: the Scarabeo 9 semi-submersible — shown here in Turkey's Bosphorus Strait — is working for Eni in AngolaPhoto: SAIPEMIain EsauLondon