Drill in deep water well drilling rigs use has played a pivotal role, followed by small series to take you to find out, in the course of using the bit needs to pay attention to what matters:

Bit in drilling structure, needs to replace the Center drill in a timely manner, you first need to is clean at the end of the hole, and then blow clean the residue, until after the drill bit stop, then slowly lift drill.

Bits in the drilling process, also need to carefully observe the follow up of casing, timely understanding of specific situations within the hole, when the inevitable need to keep the hole clean and the powerful pull up.

Above is on deep water well drilling bit note, hope small summary can help you.