Pioneer Energy Services Corp. provided fourth quarter update and revised guidance. Production services revenue is estimated to be down approximately 8% sequentially versus previous guidance of flat to down 4%. in addition, gross margin as a percentage of revenue is estimated to be at the low end or just below the previous guidance of 20% to 23%. both revenue and gross margin percentage were impacted by softer than expected activity in wireline as completion activity slowed late in the fourth quarter. Domestic drilling margin per day is expected to be at the high end of the current guidance of $9,700 to $10,200 per day.