Best drill bit for quartzite

The key takeaway is that diamond drill bits are the most reliable and efficient option for drilling quartz. Other types of drill bits should only be considered as a last resort and with a thorough understanding of their limitations. [pdf]

Offshore drilling rig fire july 2019

On 14 July 2019, at 21:50 a fire occurred on LLOG’s deep draft semi-submersible facility Mississippi Canyon (MC) 547 A platform, Lease OCS-G 32334. A 1/2” isolation valve on a pressurized pipeline pump’s discharge piping developed a crack. [pdf]