Ann: Update on BBB 33 Evaluation and Bolling 4 Drilling, page-61

Vacuum or low-pressure techniques can be used in several ways to enhance flow rates in natural gas wells, including those producing helium. Here's a brief overview of how this process works:

1. Artificial Lift Methods: One common technique is to use artificial lift methods such as gas lift or electric submersible pumps (ESPs). In gas lift systems, compressed gas is injected into the wellbore to reduce the hydrostatic pressure of the fluid column, thereby decreasing the backpressure on the formation and promoting gas flow. With ESPs, an electric pump is submerged in the well to lift fluids to the surface, effectively reducing bottom-hole pressure and improving flow rates.

2. Downhole Pumping: Another approach involves downhole pumping systems, such as rod pumps or hydraulic pumps, which mechanically lift fluids from the reservoir to the surface. These pumps create a lower pressure environment in the wellbore, allowing gas, including helium, to flow more freely from the formation.
   

3. Pressure Maintenance: In some cases, vacuum or low-pressure techniques may be used in conjunction with pressure maintenance strategies, such as gas injection or water flooding, to maintain reservoir pressure and enhance gas production over the long term.

Overall, these techniques aim to reduce the pressure gradient between the reservoir and the wellbore, facilitating the movement of gas, including helium, from the formation into the well and ultimately to the surface for collection and processing.