ConocoPhillips Sets Alaska Drilling Record ANCHORAGE, Alaska – ConocoPhillips Alaska Inc. announced yesterday that it achieved a drilling record for Alaska at drill site CD5 in the Colville River Unit (Alpine) on Alaska’s North Slope. CD5 is the first commercial oil development on Alaska Native lands within the boundaries of the National Petroleum Reserve-Alaska (NPR-A). Doyon Rig 19 drilled a horizontal injection well 26,196 feet, a record for overall measured length of a well for the state. The well was drilled to a true vertical depth of approximately 7,400 feet [...]