Figure 8.
The panel a presents a three-dimensional arrangement inside the circular chamber. Back-pressure regulators A connect to tubing around the perimeter. Cylindrical structural support B stands among multiple vertical cylindrical supports. Wellbore C occupies the central region, with sand-trap D beside it and connected tubing extending across the internal plate. The panel b presents the corresponding chamber assembly with a circular upper plate supported by multiple vertical posts. A cylindrical central component and connected tubing mount on the plate. A separate view presents the upper cylindrical assembly positioned above the chamber opening.Lower chamber and sand-trap assembly: (a) lower chamber configuration and (b) movable sand trap