Oil services stocks are going well after Petrofac said it has made a good start to the year and is confident 2009 will be another year of strong growth.Petrofac itself is slightly in the red though. Engineer Bateman Litwin is the top riser, helped by higher oil prices, with the price of a barrel of crude now at its highest in eight months. The current hot weather is no doubt good news for drinks firms, but they are left on the shelf today. Magners cider maker C&C and Irn-Bru firm Barr are among the fallers. Top performing sectors so far todayOil Equipment Services & Distribution 12,172.24 +0.95%Electronic & Electrical Equipment 1,247.63 +0.84%Mining 14,231.25 +0.57%Technology Hardware & Equipment 257.92 +0.47%Oil & Gas Producers 6,830.37 +0.40%Bottom performing sectors so far todayAutomobiles & Parts 1,897.59 -2.63%Food Producers & Processors 3,581.16 -1.29%Tobacco 20,202.00 -1.15%Life Insurance 2,919.89 -1.14%Beverages 6,176.67 -1.07%