Bank of America Merrill Lynch acts as representative of initial purchasers in offering by Pioneer Drilling Company

Client(s) Bank of America Merrill Lynch

Jones Day advised Bank of America Merrill Lynch, as representative of the initial purchasers, in connection with the issuance of $175 million of 9 7/8% Senior Notes due 2018 in a Rule 144A and Regulation S offering by Pioneer Drilling Company, a provider of drilling and production services to independent and major oil and gas exploration and production companies throughout the United States and in Colombia. The Notes were issued as additional notes under an indenture pursuant to which, on March 11, 2010, the issuer issued $250 million of 9 7/8% Senior Notes due 2018.