Main Riser Tube
AssemblyThe large-bore central pipe that carries the drill string and returns; everything else on the joint hangs off it, and it takes the full string tension. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Main Riser Tube
5 top-level lines as of r50182| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Riser Tube Body | drilling-riser-joint-tube-body | 1× | 1 | · | part |
| 2 | Internal Wear Liner | drilling-riser-joint-tube-liner | 1× | 1 | · | part |
| 3 | End Forging | drilling-riser-joint-end-forging | 2× | 2 | · | part |
| 4 | Weld Overlay Band | drilling-riser-joint-weld-overlay | 2× | 2 | · | part |
| 5 | External Coating | drilling-riser-joint-tube-coating | 1× | 1 | · | part |