NEW YORK ( TheStreet) -- Exterran Holdings ( EXH), ONEOK Partners ( OKS) and DCP Midstream Partners ( DPM) showed strength this past week; Renesola ( SOL), Trina Solar ( TSL), JA Solar Holdings ( JASO) and Advantage Oil & Gas ( AAV) eroded substantial value.Exterran Holdings led the pack of winners last week, up 18.4%. ONEOK Partners rose 8.7%. The stock was raised to outperform from neutral at Credit Suisse. The price target was increased to $54 a share from $45. DCP Midstream Partners improved 7.7%. Total SA ( TOT) gained 5.8%. Total's unit Elf Aquitaine has won a bid at the European Union on anti-trust fines levied for its alleged role in the monochloroacetic acid cartel. The EU has scrapped a judgment against Elf Aquitaine, Reuters reports. During the past week, Total received a U.S. patent for its method and device for compressing a multiphase fluid. ENI SPA ( E) was up 5%. Eni and OAO Rosneft are negotiating to undertake a Black Sea oil project, Wall Street Journal reports. The joint venture is expected to develop Shatsky Ridge oilfield in the Black Sea with estimated reserves of 6 billion barrels, the newspaper reports. CNOOC ( CEO) added 4.9%. Bloomberg reports the stock may have gained on speculation the company could double its initial estimates at China's largest offshore natural gas deposits in the South China Sea. Exxon Mobil ( XOM) rose 4.8%. Exxon and Ukraine's Naftogaz have signed an agreement to explore and develop shale gas deposits in Ukraine. According to Energy Information Administration, Ukraine has shale gas reserves estimated at 42 trillion cubic feet. Enbridge ( ENB) edged up 3.4%. PetroChina ( PTR) piled 3.3%. The company is entering into a joint venture with Shell to buy Bow Energy for Australian Dollar 535 million ($513 million). Shares of Statoil ASA ( STO) and Williams Partners ( WPZ) climbed 3.3% and 2.9%, respectively. Other movers were Chevron ( CVX) (+2.9%), Tesoro ( TSO) (+2.8%), Provident ( PVX) (+2.6%), China Petroleum & Chemical Corp. ( SNP) (+2.6%) and Sunoco Logistics Partners ( SXL) (+2.5%). ReneSola was the top decliner, plunging 22.9%. Other solar players, Trina Solar and JA Solar Holdings shed 20.9% and 19.1%, respectively. Advantage Oil & Gas declined 15%. Other stocks that pared losses included TransAtlantic Petroleum ( TAT) (-14.1%), CARBO Ceramics ( CRR) (-13.6%), Rosetta Resources ( ROSE) (-12.9%), Nabors Industries ( NBR) (-12.9%), Suntech Power Holdings ( STP) (-12.5%), Precision Drilling ( PDS) (-11.9%), SunPower ( SPWRA) (-11.3%), Yingli Green Energy Holding ( YGE) (-10.4%), Frontline Ltd/Bermuda ( FRO) (-10.4%) and First Solar ( FSLR) (-10%). Helmerich & Payne ( HP) dropped 9%. The stock was downgraded to market perform from outperform at Sanford Bernstein. The 12-month target price is $57 a share.