Isabella Patel——Studied at the University of Manchester, Lives in Manchester, UK.
Another common type of sub is a bit sub. A bit sub is a sub that is used just above the bit and serves as a crossover between the drill collar connections and the bit connection, and it also houses the float valve.read more >>
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.