US Patent:
20070246221, Oct 25, 2007
Inventors:
Doug Jones - Houston TX, US
Randy Ray - Houston TX, US
Jay Forrester - Bellaire TX, US
International Classification:
E21B 7/12
Abstract:
A method for drilling riserless that includes providing a drilling fluid to a drilling assembly for drilling a borehole on a seafloor, the drilling assembly comprising a drill string and a bottomhole assembly, and wherein the drilling fluid includes a brine, and a non-hydratable clay, wherein the drilling fluid is substantially free of hydrating clays, and flowing the drilling fluid and cuttings through an annulus formed by the drill string and the borehole into sea water is disclosed.
