In Open Systems (OPF), fluid power and recovery liquid mixing together back out of the ground, fuel pump dispenser in a closed system (CPF), ground and downhole fluid circulates in a closed loop, and pick out feed. Open type hydraulic piston pump system closed hydraulic piston pump oil production system ground transportation process open power fluid system of surface gathering process, the process is more suitable for multi well system, under the jurisdiction of the numbers, dozens of wells.
Simple and economic are the main features of the open process. Of course, in the open system, water or other liquid is used as the power fluid, but due to the addition of chemical additives, portable fuel transfer pump lubricating, anti rot, deoxygenation) to produced liquid mixing produced generally has been lost. Therefore must be continuously added.
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