🔍 Key Concepts

• Jack-up rig elevation and what happens to normal sea chests/intakes when the hull is raised out of the water • Primary purpose of mud pumps, fire pumps, raw water tower pumps, and bilge pumps on an offshore drilling unit • How a saltwater eductor gets its motive water when the hull is not directly in the sea

💭 Think About

• When the COASTAL DRILLER is elevated, which pumps still have a reliable suction source in the sea? • Which of these pump types is specifically intended to supply seawater to several systems (including eductors) rather than being dedicated to just mud circulation, firefighting, or bilge water? • Think about which system is designed to work even when the rig’s main hull is high above the water surface.

✅ Before You Answer

• Verify the primary function of mud pumps vs. fire pumps vs. bilge pumps vs. any dedicated raw-water supply pumps on a jack-up rig. • Check which system is designed to maintain continuous seawater suction when the rig is jacked up and the hull is clear of the waterline. • Confirm which pumps are normally tied into the saltwater eductor system rather than used only for emergency or specialized service.