Apache Corporation Mr. Frank LeGros OCS-G 15312 #A-5 Ship Shoal 354 Offshore, LA BLOCKADE ™ CASE HISTORY Problem Depth: 13,842’ MD/ 13,574’ TVD Hole Size: 8 1/2” Mud Vendor: Ambar Mud Wt: 15.7 cut to15.0 #/gal DrillChem Engineer: Dale Shank Mud Type: Water Base Problem: With 9 7/8” casing set at 12,770’ MD (12,401’ TVD), the shoe and formation had been tested to 18.1 #/gal EMW. Mud weight had been increa

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