Core drilling rigs are always used to obtain diamond cores. Here we are going to learn about what is a good quality core.
A good quality core is one that is intact, clean, free from artificial breaks, and properly boxed and labeled as to depth and recovery. In the diamond coring business, we measure percent recovery on every hole; that is the amount of core retrieved relative to the total depth of the hole. Good companies with solid mud programs and competent crews will achieve 95 percent recovery with little to no issues on average.