🔍 Key Concepts

• Drilling loads on an offshore unit like COASTAL DRILLER • Difference between constant/structural loads and operational/drilling loads • How setback (stands of drill pipe in the derrick) affects total loading

💭 Think About

• Think about which type of load changes as drilling operations progress: pulling pipe, rotating, adding/removing stands, etc. • Ask yourself: which choice best describes the additional loads from drill string, mud, and equipment that are not permanently attached structural loads? • Consider what the term setback specifically refers to on a drilling rig and whether it is already accounted for separately from conductor, rotary, and hook loads.

✅ Before You Answer

• Be clear on the difference between fixed/structural loads (permanent weight of the rig) and operational/drilling loads (pipe, mud, tools). • Confirm what the setback area is and what is stored there—does the question already include those effects under another term? • Check which option correctly names loads that can change with operations, not just remain constant.