CP – Core Point DMF – Downhole Motor Failure DP – Drill Plug DSF – Drill String Failure DST – Drill Stem Test DTF – Downhole Tool Failure FM – Formation Change HP – Hole Problems HR – Hours on Bit LIH – Left in Hole LOG – Run Logs PP – Pump Pressure PR – Penetration Rate RIG – Rig Repair TD – Total Depth/Casing Depth
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