PHAZER

Casing centralizers in the nature of metal casings used to stabilize the wellbore in oil and gas wells; downhole apparatus, namely, oil industry pipes of metal; downhole apparatus in the nature of metal liners, casings, and pipes for use in wellbores

Casing centralizers in the nature of non-metal casings used to stabilize the wellbore in oil and gas wells; downhole apparatus in the nature of non-metal liners and casings for use in wellbores