barge drilling造句

Ensco International Inc . said Chevron Corp . has agreed to lease three new barge drilling rigs in a contract Ensco estimates will provide it $ 190 million in revenue over five years.
Ensco International Inc . said Chevron Corp . has agreed to build and lease three barge drilling rigs in a contract that Ensco estimates will provide it with $ 190 million in revenue over five years.
It's difficult to find barge drilling in a sentence. 用barge drilling造句挺難的