Rotary-steerable technology lowers drilling time, well costs

Rotary steerable, directional-drilling systems increased rate of penetration (ROP) and saved more than 100 days of rig time when used to drill complex 3D wellpaths in the 121/4-in. and 81/2-in. hole sections of Jotun field development wells, compared to conventional directional-drilling systems.The Jotun field lies 165 km off Norway in 127 m of water. Esso Norge AS developed the field, from a wellhead platform using a fit-for-purpose, new-build drilling rig, with complex directional horizontal producers in the Paleocene, Heimdal sandstones at about 2,050 m TVD subsea.Drilling operations experienced no hole problems or wellbore instability during the 15-well Jotun drilling campaign. The co...

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