Patent ID: 7789162

Claim:
A method for inserting a tubular into a wellbore, the method comprising: a) selecting an external tubular running fluid having a density that reduces drag acting on a tubular to be run into at least one deviated portion of the wellbore, wherein the density of the external tubular running fluid is selected so that the tubular is locally substantially neutrally buoyant in at least part of the at least one deviated portion of the wellbore, b) placing the external tubular running fluid into the at least a part of the at least one deviated portion of the wellbore, c) placing a second fluid into the wellbore above the external tubular running fluid, the second fluid having a density less than the density of the external tubular running fluid; and d) running the tubular into the wellbore with a plug in the lower portion of the tubular that prevents the external tubular running fluid from mixing with fluid inside the tubular above the plug.