Environment
Environmental impact (17 ½ and 12 1/4 sections). Not HTHP.
| WBM | OBM | |
|---|---|---|
| Emissions | Yes | No (vessel transport to shore) |
| ROP | 1 | 1.2 |
| Consumption | X2.5 | x1 |
| Transport to/from rig | X2.5 x 1.3 = 3.25 | X1 x 1.65 = 1.65 |
| Production of slop | No | Yes |
| Effect on the working environment | -1 | -2 |
| Harmful external environment | 1 | 2 (Norwegian Continental shelf) 3 (UK sector) 4 (Africa) |