A 7-7/8” drill bit was lowered into the well to the top of cement at 429 ft measured depth (MD) depth. Cement was drilled to 505 ft MD. With the bit inside the 8-5/8” casing, lost circulation material was added to the drilling fluid. The remaining cement inside the casing was drilled. Cement and formation was drilled to 597 ft MD. The drilling assembly was pulled out of the well. A 7-7/8” PDC bit and directional drilling assembly was picked up and lowered into the well. The bit was oriented and new hole was drilled to 950 ft MD. Pipe became stuck on a connection and was worked free. Drilling fluid was circulated as fluid density and viscosity were increased. Drilled from 950 to 1,010 ft MD.
Notes/Observations
n/a
Drilling Activity for December 4, 2011
Drilled from 1,010 to 1,231 ft measured depth (MD). Started wiper trip, and pipe stuck (up and down). Worked pipe free and circulated drilling fluid, raising fluid density to 10.2 pounds per gallon (ppg). Pulled bit out to casing shoe to wipe hole. Lowered bit to 1,231 ft MD and resumed directional drilling. Drilled directionally from 1,231 to 1,988 ft MD. Made wiper trip every 2 to 4 hours.
Notes/Observations
Directional drilling is on or very near planned course
Hole stability problems seemed to have been cured with 10.2 ppg fluid density, and wiper trips will be less frequent if hole stability continues
