The last type of casing string that is run into the well, and therefore the smallest in diameter, is the production or oil string. The oil string is run directly into the producing reservoir.

Choosing the right steel for your oil and gas projects is key. BalingSteel offers both oil casing and linepipe worldwide. They make sure the materials fit your needs. This guide will show you how each ...

Then crude oil began migrating up from underground and ... The Keltons say the sinkhole has grown significantly in the past 18 months. The well casing fell deeper into the hole.