OSLO -- Statoil has tested a new method that simplifies drilling operations in unstable formations on the Brage field. The “liner drilling” solution makes it possible to operate with a well liner attached directly to a steerable drillstring, the company says.
In conventional drilling, work has to halt while the string is pulled from the well and a liner set to prevent the borehole walls from collapsing.
“Setting liner while drilling means we don’t have to leave the borehole open and minimizes the risk of collapse,” says Geir Slora, head of drilling and well at Statoil.
Developed in-house, the technology helps overcome the challenges of drilling in zones with lower pressure and difficult shale/coal layers, and in formations with varying flow and pressure regimes, the company says. The new technology – known officially as steerable drilling liner (SDL) – is the outcome of many years of collaboration between Statoil and equipment supplier Baker Hughes.
Statoil tests new drilling method on Brage field
Statoil has tested a new method that simplifies drilling operations in unstable formations on the Brage field.