Main Shaft / Quill
AssemblyHollow drive stem transmitting torque and hoisting load to the drill string while passing mud through its bore. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Main Shaft / Quill
6 top-level lines as of r50239| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Drive Stem | drilling-top-drive-drive-stem | 1× | 1 | · | part |
| 2 | Load Collar | drilling-top-drive-load-collar | 1× | 1 | · | part |
| 3 | Ball Bearing | ball-bearing | 1× | 1 | · | part |
| 4 | Wash Pipe Tube | drilling-top-drive-wash-pipe-tube | 1× | 1 | · | part |
| 5 | Oil Seal | oil-seal | 4× | 4 | · | part |
| 6 | S-Pipe / Gooseneck | drilling-top-drive-gooseneck | 1× | 1 | · | part |