Operational LL with Wellesley

Carmen (35/10-10S) – Surface section

What happened:

NPT: 0.75 hrs Cost: 156 250 NOK Downtime due to Work String/Jar/Stuck Equipment. Freed stuck BHA with bit at 1129 m: – Observed string stall out immediately after bit drilled through shoe at 1128 m. – Attempted to free string with 12-15 t OP, no-go. – Set down 10 t weight, bit would not move down. – Unable to re-initiate rotation with 30 kNm max torque setting on TDS, string stalled out. Increased maximum to 50 kNm, string stalled out. – Continued to work string with higher OP. BHA came free with 45 t OP. Pulled bit up to 1125 m. – Re-initiated rotation and staged up to 90 RPM / 1-2 kNm. – Slowly worked bit down to 1129 m. Torque increased to 3-4 kNm.

What was planned:

Drill/Mill shoetrack & Cement