Overview


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
Case study details

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.

 

 

Download the PDF to read the full case study.

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