Derrick
AssemblyBolted lattice tower ~65 m above the drill floor with two load paths (main and auxiliary) rated around 1,250 short tons each; tens of thousands of high-strength bolts hold it together. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Derrick
4 top-level lines as of r50295| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Derrick Lattice Member | drillship-derrick-member | 2400× | 2,400 | · | part |
| 2 | Derrick Bolt Set | drillship-derrick-bolts | 95000× | 95,000 | · | part |
| 3 | Crown Block | drillship-crown-block | 1× | 1 | · | part |
| 4 | Ball Bearing | ball-bearing | 12× | 12 | · | part |