"It's time to open the black boxes of the petroleum companies."

In the 1980s-1990s, petroleum companies began exploring the peninsula for oil.

In the years that followed, petroleum companies moved even farther into the ocean.

When this happens, petroleum companies plug and abandon the well.

He later became vice president of a petroleum company.

"Liwa" first began operating as a petroleum company in 1939.

But the commission has now begun to process claims from petroleum companies, and the amounts being sought are significant.

Most major players in the truck stop industry are petroleum companies that decided to open restaurants as a way to encourage fuel sales.

He previously served as chairman of a petroleum company.

This technique is used worldwide amongst petroleum companies to compare their results in the same way.