Valaris Limited (VAL) , an offshore drilling services provider, has announced that it will permanently retire three semi-submersible rigs as part of its efforts to streamline its drilling fleet. Additionally, the offshore driller has announced the sale of a jack-up rig for $24 million. The three semi-submersible rigs are expected to be out of service and permanently removed from the global drilling supply.The company will retire the three semi-submersibles — VALARIS DPS-5, VALARIS DPS-3 and VALARIS DPS-6. V ...