Dull Bit Condition 1. A bit was pulled out after drilling 1000 m in 80 hrs. The driller reported the bit dull bit condition of Bit as T5. It means 5/8 of total height of bit teeth is a. Remaining b. Gone or exhausted c. 50 % height is gone d. None of the above 2. A bit was pulled out. Driller jumbled up the reported dull condition of bit as follows: Dull condition-BT , Outer rows cutter wear-6 , Location-A , Inner rows cutter wear-4 , Other dull condition-PN , Reason for POOH-ROP , Bearing wear-E , Gauge wear-1/16” Please help the driller in reporting dull condition correctly in each column the table given below: 1 2 3 4 5 6 7 8 Cutter structure condition 3. The driller measured the gauge wear in a 8-1/2” roller bit Pulled out after drilling abrasive sand for 300 m depth. When he measured bit, he found measured distance on the third roller 3/16”. What is the actual undergauge of bit: a. 3/16” b. 2/16” c. 9/32” d. 1/16” 4. A bit was pulled out and the condition of teeth/ inserts is as shown in picture. Please specify the condition of inserts that are pointed by arrow: a. Broken teeth (BT) b. Chipped teeth (CT) c. Lost teeth (LT) d. Worn teeth (WT) 3/16