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AirLock G Casing Buoyancy System

The AirLock G casing buoyancy sub offers the highest strength and tolerance on the market, covering up to 14,000psi at 400°F when using the 5.5” barrier.

AirLock G offers the same functionality as our original patented AirLock casing flotation system that has been run in over 10,000 wells with 99.9% of all jobs landing casing on the first attempt.

AirLock G contains a glass pressure barrier that allows the vertical casing section to be filled with fluid, while the lateral section remains air-filled and buoyant, reducing friction up to 50%.

Operation is simple. The AirLock G casing flotation device is installed in the casing string at a location calculated to provide the optimum balance of lateral buoyancy and vertical fluid weight.

After the casing lands, increased surface pressure causes the glass disk to shatter and diffuse into the well fluid, leaving a full-drift ID. Circulation and cementing operations proceed as normal.


Systems Installed


Friction Reduction


First Run Success*

* In 99.9% of 10,000+ legacy AirLock installations, casing has landed on the first attempt.

Additional Benefits Include:

  • Calibrated shear ring ensures predictable operation
  • Unrestricted ID after operation
  • Sub can be torqued through
  • Compatible with ALL completion methods