All usa oil companies ran into bankruptcy due to two:
1. CORONAVIRUS 2. USA oil companies can not compete with OPEC including Russia due to too high in labor cost in usa.
For example Let's say a barrel of oil is now $40.
OPEC and Russia still make profit from the low value of each barrel While usa cannot make profit from the low value of each barrel due high cost of debt and high cost of labor
USA can not compete with the other nations in oil markets.