connecting the drill pipe 110 to the liner 120 the running tool may include a latch and or gripping members that may releasably attach and detach from the liner 120 the running drilling tool is adapted to transmit axial and torsional forces from the drill pipe 110 to the liner 120 the running tool may be released from the liner 120 so that the bha may be retrieved preferably the running tool has torque capability that equals or exceeds the drill pipe capability and is adapted to endure typical bore hole drilling dynamics exemplary running tools are disclosed in u s pat nos 5 613 567 5 531 273 and 6 032 734 which patents are incorporated herein by reference in their entirety the liner top equipment liner hanger and pbr may also include large radial clearance for cuttings bypass and reduced equivalent circulating density u201c ecd u201d and setting of liner hanger does not reduce the annular clearance area significantly in one embodiment setting of the liner hanger and release of drilling tool may be independent of the differential pressure between the inside of the tool and the outside of the liner to prevent premature activation in another embodiment the liner top assembly is not equipped with a packer in yet another embodiment the liner top.