This column highlights the most interesting and useful business and financial commentary on energy from around the Web. San Francisco Times Link: Chevron Corp. Inks Exploration Deals Off China Coast “Oil and gas giant Chevron Corp. (NYSE:CVX) made deals to explore parts of the South China Sea.   “San Ramon-based Chevron made the deals via a subsidiary to work with China National Offshore Oil Corp. or CNOOC in the Pearl River Mouth Basin.”   Insider Monkey Link: Exxon Mobil Corporation Seadrill Ltd: Is Arctic Drilling a Boom or Bust Proposition? “Shell (NYSE:RDS.A) found out the hardships of arctic drilling when its Killuk ...