Clayton Williams Energy, Inc. (CWEI:NASDAQ) recently announced that it planned to increase its number of rigs in the Wolfbone formations.

Mountainview Energy Ltd. (MNVWF:US) recently signed an agreement to greatly increase its holdings in the northern United States.

IHS Inc. (IHS) recently agreed to buy a geophysical software producer for half a billion dollars.

The Gravis Oil Corporation (GRAVF.OB) recently announced that it had begun steaming a new well pattern in western Missouri.

Hilcorp Energy Corp. recently agreed to a deal with Chevron subsidiary Union Oil Co. of California (Unocal) to acquire its Alaska Cook Inlet oil and gas assets.

The world's largest mining company, BHP Billiton Ltd., recently purchased Houston-based Petrohawk Energy Corp. for $12.1 billion.

TransCanada, an Alberta-based energy company, recently shot back at criticism about its pipeline route choice from U.S. senators.