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- Case-off an open hole below a long intermediate casing string or when casing is being hung off bottom.
Reduce off-bottom time by preventing the need to lay down drill pipe and pick up a full casing string.
Control water, gas, or sand intrusion after a previous open-hole completion.
Protect against down-hole blowouts when drilling abnormal pressure zones.
Prevent flow of fluids between zones or intervals.
Hold back unconsolidated or sloughing formations and establish high quality cement completions.
Prevent loss of circulation in weak upper zones while drilling with normal weighted mud to control normal pressured zones at deeper intervals.
To repair damaged casing in closed holes.
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