Casing wear is an increasingly typical problem that leads to a decrease in collapse resistance in deep wells, ultradeep wells, horizontal wells, and extended reach wells. Casing wear is an ...

I have found the formla! Sorry I don’t know how to attach file here, so please click the link get my article: my blogger In this paper I given the formula of equivalent resistance for arbitrary ...

I recently asked a group of 90 digital-board designers in Boston how many power-supply voltages were in their latest designs. Three, four, and five-voltage systems were quite common. The most was ...