ANALYSIS OF FACTORS AFFECTED PDC BIT’S DRILLING

The PDC bit’s drilling process was analyzed systematically using typical cor-relation technique and actual drilling data, which made a correlation calculation in groups of general case, similar formation and similar bit type respectively and checked the correlation factors. The result of analysis indicated that match between formation and bit is the key fac-tor affected PDC bit’s drilling and drilling fluid density is the key measures for the drilling result of PDC bit, which is just on contrary with roller bit. Under normal condition, PDC bit’s wear depends only on bit structure and formation property other than drilling measures.