Analyzing usable fluid volume and proposal of accumulator bottles

Blowout Preventer （BOP） and BOP control system is indispensable equipment in the drilling performance, and accumulator bottles are very important part of BOP control system. So analyzing usable fluid volume of accumulator bottles becomes fairly significant. This paper analyzes the relations between usable fluid volume and the nitrogen precharge pressure of accumulator bottles in detail, and puts forward some relevant proposals.