ZXHD liner top packer stopped gas flowback in offshore well Challenges • Openhole well in unstable formation • Gas flowback observed from the formation below • S-curve in the wellbore made running the liner more difficult Results • 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) t

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