Step 2 in the presentation functions as a velocity string, with...

Step 2 in the presentation functions as a velocity string, with the flow going up the 1.75 " coil tubing. Smaller cross sectional area than the cross sectional area of the annulus space in step 1.
The capacity of the membrane unit mentioned in the latest update will be matched to the N2 flow required for both steps. The beauty of the membrane/ reverse osmosis plant is it only requires diesel to run the air compressor to keep producing 99% pure N2 from the cool Alaskan air.
An interesting week ahead as we should now be at step 2, which implies down hole pressure will have dropped into a pressure zone it has never seen before, so we can anticipate a different response from the reservoir as the greater differential pressure applies to the fracture faces in the rock