Shares of Patterson-UTI ( PTEN) were among the Nasdaq's winners Thursday, rising 7% after the oil driller posted better-than-expected fourth-quarter results and boosted its stock buyback plan. The company earned $134.2 million, or 77 cents a share, on revenue of $531.2 million. Results included a charge of 3 cents a share related to a previously announced embezzlement by the company's former chief financial officer. Analysts polled by Thomson First Call expected earnings of 73 cents a share on revenue of $510.4 million. During the year-earlier period, the company earned $34.2 million, or 20 cents a share, on revenue of $288.3 million. Patterson-UTI also said it is now authorized to purchase up to $200 million in stock. "Our decision to increase the stock buyback program demonstrates continued confidence in the company's strong cash flow and our continuing commitment to deploy excess capital in a manner beneficial to shareholders," the company said. Shares were trading up $2.14 to $32.49. Lamson & Sessions ( LMS) jumped 11% after the maker of enclosures, fittings and conduits for the electrical and telecom markets raised its first-quarter projections. The company now sees earnings of $8.3 million to $8.8 million, or 53 cents to 56 cents a share. Previously, the company forecast earnings of 41 cents to 44 cents a share. Lamson & Sessions raised its sales forecast to a range of $132 million to $135 million from $123 million to $127 million. Two analysts have an average estimate for earnings of 43 cents a share, while one analyst projects sales of $124.6 million. Last year, the company reported first-quarter earnings of $2.2 million, or 15 cents a share, on sales of $98.8 million. Shares were up $2.65 to $27.35. Shares of Blyth ( BTH) fell 3% after the maker of home décor products posted weaker-than-expected fourth-quarter results and gave a fiscal 2007 forecast that missed expectations. For the quarter ended Jan. 31, Blyth reported a loss of $12.3 million, or 30 cents a share, compared with a year-earlier profit of $39.2 million, or 95 cents a share. Excluding various charges, Blyth would have earned 67 cents a share, below Wall Street's projection of 75 cents. Sales slipped to $480.6 million from $498.8 million. The company said results were hurt by reduced consumer discretionary spending, as well as higher commodity costs and freight surcharges.