bohlsen,
I must correct you on diameters,
Neither Hab-1 nor Hab-2 have liners.
They both have 7" casing running from surface to just inside the top of the granite, (Hab-2 was 3920m),
From there both holes are open 6" diam, with no liner.
ie the diameter of the hole is the same all the way down to the shoe, ie about 158mm, and thence 152mm to the bottom.
The 610mm diam you refer to is that of a earlier casing string cemented behind subsequent casing strings, so that diam does not apply.
Hab-3, J-1, S-1 all have 13 3/8 casing with an internal diameter of 315mm from surface to inside the top of the granite, and Hab-3, has a slotted liner from there to the bottom. J-1 has no liner in the granite section, so that they can re-enter to stimulate the fracture zones, and for this packers would need to be set.
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