NEW YORK (TheStreet) -- Canadian Oil Sands, Lufkin Industries (LUFK) and RPC (RES - Get Report) were top gainers last week, while Renesola (SOL - Get Report), Weatherford International (WFT - Get Report) and Cheniere Energy Partners (CQP) fared poorly, heading the losers' list.

Canadian Oil Sands, Lufkin Industries and RPC surged around 9.5%, 9.3% and 8.7%, respectively; MOL Hungarian Oil and Gas gained 7.0% during the week. Wood & Company upgraded MOL to buy from hold, while Concorde upgraded the stock to overweight from equal-weight. Meanwhile, MOL sees significant production increase in Russia after 2013.

Marathon Oil ( MRO - Get Report) added 6.3%. Earlier in the week, the company agreed to abide by all U.S. government sanctions on Libya and ceased tax and royalty payments to the Libyan government.

Meanwhile, Polski Koncern Naftowy Orlen advanced 6.2% after Credit Suisse raised the stock to outperform from neutral.

Statoil ( STO) gained 6.0% during the week and received an upgrade to buy from accumulate from Danske Markets. The company expects European gas demand to strengthen in 2011. According to Statoil, Europe's gas storage levels are at 52%, with 38 billion cubic meters in store, up 3.7 billion cubic meters from 2010 levels.

SandRidge Energy ( SD) piled 5.5% after reporting better-than-expected 2010 financial results of a loss of 7 cents per share vs. estimated 8-cent loss. Revenue came in at $293.1 million, opposed to consensus $276.5 million. After the results, RBC Capital raised its price target on the stock to $9 from $7, based on the company's higher-than-expected year-end reserves and RBC's belief that the company's Permian and Mississippian well results are encouraging. Meanwhile, Keybanc Capital Markets raised the stock to buy from hold. Stifel Nicolaus raised its price target to $13 from $7.5 to reflect increased valuation of the company's Mississippi oil assets.

Noble Energy ( NBL) rose 5.1% on news that U.S. regulators approved the company's permit for deepwater drilling, the first permit after BP's Gulf of Mexico oil spill prompted the U.S. administration to impose a drilling moratorium.

Whiting Petroleum ( WLL) advanced 4.9%, despite receiving Pritchard Capital's valuation-based downgrade to neutral from buy. Similarly, Helix Energy Solutions Group ( HLX) advanced 4.8%, although Raymond James downgraded the stock to outperform from strong buy. Meanwhile, Raymond James has initiated a strong buy rating on Oil States International ( OIS) and the stock gained around 4.7%.

Other movers Oasis Petroleum ( OAS), Dresser-Rand Group ( DRC), Superior Energy Services ( SPN) and Advantage Oil & Gas ( AAV) were up 6.5%, 6.4%, 5.7% and 5.4%, respectively.

Oil giants PetroChina ( PTR - Get Report) and ConocoPhillips ( COP - Get Report) jumped 3.7% and 3.5%, respectively.

Renesola was the top loser, plunging nearly 19.7%. The company's guidance for 2011 first quarter revenue came in at $310 million-$330 million against analysts' estimates of $347 million. Other solar stocks LDK Solar ( LDK), Yingli Green Energy Holdings ( YGE), Trina Solar ( TSL), First Solar ( FSLR), Suntech Power Holdings ( STP) and JA Solar Holdings ( JASO) tumbled 10.8%, 9.0%, 6.7%, 5.9%, 5.5% and 4.8%, respectively.

Weatherford International plunged 14.1% last week after delaying 10-K filing, citing material weakness in internal controls, in addition to the company's exposure to the Middle East unrest.

Cheniere Energy Partners dropped 12.2% after reporting 2010 fourth quarter loss at 2 cents per share, in comparison to earnings of 34 cents per share reported for the year-ago period. Meanwhile, revenue came in at $72.2 million vis-à-vis $130 million reported for 2009 fourth quarter.

STR Holdings ( STRI) erased 10.0% after Auriga lowered its price target on the stock to $19 from $22, while maintaining a hold rating, due to concerns related to margin pressure.

Swift Energy ( SFY) fell 7.9% after the company reported earnings per share at 25 cents against the consensus 34 cents. Jefferies has downgraded the stock to hold from buy.

Range Resources ( RRC) shed around 6.8% after reporting 2010 fourth quarter revenue at $238.7 million vs. consensus $264.1 million. Non-GAAP earnings per share came in at 19 cents against estimated 14 cents. FBR has Capital downgraded the stock to market perform from outperform, based on valuation.

Rosetta Resources ( ROSE) dipped 6.1% after Capital One Southcoast downgraded the stock to neutral from add, citing valuation, while SunTrust cut its rating on Rosetta Resources to neutral from buy.

Bill Barrett ( BBG) retreated 3.9% after Pritchard Capital downgraded the stock to neutral from buy, construing lack of reserve increases.

Among others, Quicksilver Resources ( KWK), Forest Oil ( FST), InterOil ( IOC) and Chesapeake Energy ( CHK) diminished 8.6%, 5.6%, 5.3% and 5.1%, respectively.