Figure F3. Drilling parameters and gamma ray log plotted vs. time for MWD-APWD operations, Hole C0006A. GR_RAB = MWD tool real-time gamma ray log, ATMP = annular temperature, ECD = equivalent circulating density, APRS = average annular pressure, TRPM = MWD turbine rotation speed (off = <1500 or >4500 rpm, on = 1500–4500 rpm), CRPM = collar rotation, SWOB = surface weight on bit, HKLD = hook load, SPPA = standpipe pressure, ROP = rate of penetration, ROP_5ft = 5 ft averaged ROP, LSF = LWD depth below seafloor, DRF = drillers depth below rig floor.
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