- Openhole well in unstable formation
- Gas flowback observed from the formation below
- S-curve in the wellbore made running the liner more difficult
- Protected well integrity with V0-rated, gas-tight annular seal
- Supported successful liner installation to guard against hole instability
- Reduced operational, personnel, and environmental risk
A shelf operator off the coast of Louisiana was drilling a 16,000-ft (4875-m) openhole well from a jack-up rig. The plan called for installing roughly 3,000 ft (914 m) of 7-in., 32-lb liner starting at 10,770 ft (3283 m)—and then running 5-in. liner below that to the toe of the well—to stabilize the hole and reduce potential non-productive time (NPT) typically caused by hole instability. Because of its ability to create a gas-tight annular seal and stop gas flowback with pressures from below as high as 10,000 psi (690 bar), the ZXHDTM liner top packer was chosen to use with the 7-in. liner.
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