6. Complete Production Services ( CPX) provides oil and gas companies products and services to develop hydrocarbon reserves. For the second quarter of 2011, the company reported net income of $54.5 million from $15.7 million in the same quarter last year. Adjusted EBITDA, as a percentage of sales, was 29.5% for the second quarter, benefiting from increased activity by upstream companies, as well as the deployment of the company's third frac fleet in July. Revenue increased 53% year-over-year to $552 million, on improved activity and deployment of new assets. The company completed a $15.6 million acquisition of a hydraulic snubbing and production testing business. During the quarter, the company incurred capital expenditure of $93 million. Based on analysts' consensus estimate, the stock is expected to deliver 77% over the next one year and is trading at 10.2 times its estimated 2011 earnings. Analysts polled by Bloomberg recommend an 86% buy rating on the stock.