5 – Reaming

20 November 2012

Alert 12 – 28 Driller Inattention Results in Dropped Blocks

24 August 2010

Alert 10 – 24 Air Valve Malfunction Results in High-Potential Near Miss

Alert 10 – 24 Air Valve Malfunction Results in High-Potential Near Miss WHAT HAPPENED: The driller was in the process of back reaming when the air supply
25 March 2009

Alert 09 – 07 Failed “O” Rings Result in Dropped Drill String

Alert 09 – 07 Failed “O” Rings Result in Dropped Drill String WHAT HAPPENED: The rig operation was back reaming. During this operation, the air supply to
26 December 2008

Alert 08 – 42 Dropped Object: Kelly Disconnects from Hook

Alert 08 – 42 Dropped Object: Kelly Disconnects from Hook WHAT HAPPENED: During drilling of the surface hole (12 ¼“), the driller made a connection and started