Patent ID: 6763902
Filing Date: 2004-07-20
Classification: E21B

Abstract:
A roller cone drill bit, comprising:a drill bit body with an exterior and defining a bit diameter, a longitudinal axis, and an internal fluid plenum for allowing fluid to pass through, and having at least a first cone; an opening in said drill bit body adjacent said first cone from exterior to said interior plenum; a nozzle retention body for attachment to said drill bit body adjacent said first cone, said nozzle retention body having an interior channel that is in fluid communication with said internal fluid plenum and with fluid outlet means for fluid discharge from said interior channel; wherein said fluid is directed along a centerline within 3 degrees of parallel to said longitudinal axis and said first cone includes at least one cutting element with a cutting tip, the shortest distance between said cutting tip and said centerline being less than 3 percent of said bit diameter.