NEW YORK ( TheStreet) -- Schlumberger ( SLB), TransAtlantic Petroleum ( TAT), Apache Corporation ( APA), El Paso Pipeline Partners ( EPB), Energy XXI (Bermuda) ( EXXI), Halliburton ( HAL), National Oilwell Varco ( NOV), ReneSola ( SOL), Canadian Natural Resources ( CNQ) and GT Solar International ( SOLR) are energy stocks with analysts' buy ratings of up to 92%. These stocks have the potential to deliver 10% to 62% gains, based on analysts' consensus estimates of 12-month price targets.

Crude oil prices took a breather at the start of the week, after news broke out that a U.S. operation killed Osama Bin Laden in Pakistan. Weak manufacturing numbers from the U.S. and a stronger dollar weighed on crude oil prices. At the start of the week, crude notched up around 24% from the beginning of the year, fueled by the unrest in the Middle East and North Africa.

We have identified 10 energy stocks with analysts' top buy ratings and the potential to deliver attractive returns over the next one year. The following 10 stocks returned an average 40% in the last one year on superior fundamentals. Analysts' consensus estimate shows 10%-62% upside potential for these stocks over the next one year.

Further, British Petroleum ( BP), STR Holdings ( STRI), Petroleo Brasileiro ( PBR), JA Solar Holdings ( JASO), LDK Solar ( LDK) and YPF ( YPF) could deliver healthy upsides according to analysts; however, we did not include them in our discussion as they have lower buy ratings.

10. ReneSola ( SOL) is a China-based manufacturer of solar wafers and solar module products.

Sales and earnings for 2010 fourth quarter topped analysts' estimates. Net revenue rose 7.7% from third quarter of 2010. Net income came in at $61 million as against a loss of $28.1 million in the same quarter last year.

As regards the business performance, Julia Xu, ReneSola's CFO, said in a press statement, "Our net debt-to-equity ratio has been reduced to 33.8% in 2010 from 104.9% in 2009, positioning us well as we look to capture market share through capacity expansions. In addition to record revenues of US$1.2 billion and record shipments of 1.2 GW, we achieved impressive gross and operating margins of 28.9% and 20.4%, respectively, for the full year 2010".

Total solar wafer and module shipments for full year 2010 were a record 1.18 GW. The company managed to secure 20 long-term contracts in 2010, representing about 1.3 GW of expected wafer sales in 2011.

The stock has analysts' buy ratings of 77% and is expected to deliver 40% over the next one year. The stock is trading at 4.7 times its estimated 2011 earnings.

9. GT Solar International ( SOLR) is a global provider of polysilicon production technology and sapphire and silicon crystalline growth systems and materials for the solar, LED and other specialty markets.

For 2011 third quarter, revenue was $263 million, corresponding to a 51% increase, or $173.6 million, in the third quarter of 2010. Gross profit for 2011 third quarter stood at $122.1 million, up from $76.7 million reported for the third quarter of 2010. Operating margin was 36.1%, compared to 33.2% in 2010 third quarter. Net income rose 73% to $63.6 million in the third quarter of 2011 from $36.8 million during the same quarter last year.

Based on the company's guidance for fiscal 2011, earnings per share are forecast in the range of $1.15 to $1.19, up from the earlier guided $1.08 to $1.18. Revenue is expected to range between $835 million and 860 million, up from the previously guided $775 million to $850 million.

Analysts suggest an 80% buy rating for the stock with an estimated upside of 28% in the next one year.

8. Canadian Natural Resources ( CNQ) is an independent oil and gas exploration and development company with operations in North America, largely in Western Canada.

During 2010, the company's crude oil and natural gas production was 425,000 barrels per day, increasing 20% from 2009. Higher crude oil prices, increased production volumes from the company's thermal and Horizon Oil Sands operations boosted 2010 revenue growth.

Net earnings for 2010 increased to $1.7 billion from $1.6 billion in 2009. Cash flow from operations was $6.3 billion, rising 4% from 2009, backed by higher crude oil volumes. International operations in the North Sea and Offshore West Africa improved the company's free cash flows, with operational cash flows at $960 million as against a capital expenditure of $395 million.

Of the 22 analysts covering the stock, 18 recommend a buy. Analysts are positive on the stock and expect it to deliver 23% over the next one year. The stock is trading at 16.8 times its estimated 2011 earnings.

7. Apache Corporation ( APA) is an independent energy company engaged in the exploration, development and production of natural gas and crude oil.

Higher oil prices and production from new wells pushed revenue to $3.9 billion in the first quarter of 2011, up from $2.7 billion last year. Apache reported first-quarter adjusted earnings of $1.1 billion, compared to $712 million in the year-earlier period. Production for the quarter stood at 732,000 boe per day and about 60% of the company's oil production came from operations outside North America.

During March 2011, Apache Deepwater, a subsidiary, agreed to join Marine Well Containment Company (MWCC), a partnership company committed to handle deepwater operations in the Gulf of Mexico. Other MWCC members are ExxonMobil ( XOM), Chevron ( XOM), ConocoPhillips ( XOM), Royal Dutch Shell ( RDS.A) and BP ( BP).

Apache's strong book and cash flows improve the stock's growth prospects. Of the 29 analysts covering the stock, 24 recommend a buy. The stock is estimated to gain around 12% in the next one year and is trading at 11.2 times its estimated 2011 earnings.

6. TransAtlantic Petroleum ( TAT) is a vertically integrated international oil and gas company engaged in the acquisition, development, exploration and production of crude oil and natural gas.

Net oil and gas production for full year 2010, after royalty, surged to 974,000 barrels of oil equivalent (boe), rising 133% from the prior year on improved output at the Selmo oil field. Additional production at the Arpatepe oil field and new production in the Thrace Basin gas fields also contributed to higher oil and gas output.

For fourth quarter of 2010, net oil and gas production, after royalty, soared 171% year-over-year to 344,000 boe from 127,000 boe during the fourth quarter of 2009. Improved production and recovery at Selmo, additional production at Arpatepe, and new production in the existing and newly acquired Thrace Basin gas fields contributed to the jump in revenue growth.

The stock has 83% analysts' buy ratings and is expected to deliver 62% upside over the next one year.

5. Schlumberger ( SLB) is a supplier of technology, integrated project management and information solutions to the oil and gas industry.

During 2011 first quarter, net income stood at $972 million, up 30% from the same period last year. Net revenue was $8.7 billion compared to $9.1 billion in 2010 first quarter.

Revenue from oilfield services grew 45% year-over-year in the December quarter, contributing 90% toward revenue.

The stock's key growth drivers in 2011 are higher technology needs for exploration and deepwater operations. Surging oil prices could support additional drilling activity in North America and the Middle East, led by Saudi Arabia and Iraq.

The stock has analysts' buy ratings of 84% and is likely to return 25% in the next one year. The scrip is trading at 12 times its estimated 2011 enterprise value per earnings before interest, tax, and depreciation.

4. National Oilwell Varco ( NOV) supplies equipment and components used in oil and gas drilling and production operations. The company derives nearly 50% of its revenue from its rig technology segment.

The company reported 2011 first quarter revenue at $3.15 billion, up 4% from the same quarter last year. Net income increased 12% to $440 million from $394 million during the same quarter last year. Gross profit margin stood at 31.6%, rising marginally from 31.5% in 2010 fourth quarter.

Reviewing the business performance, Pete Miller, chairman, president and CEO of National Oilwell Varco, said, "Our Company got off to a good start in the first quarter of 2011. Our Petroleum Services & Supplies segment performed exceptionally well, and helped offset expected lower revenues from new rig projects. The high levels of oilfield activity are spurring demand for all our products and services, serving to reload our backlog of Rig Technology capital equipment, and enabling our Distribution Services team to put up very solid revenues and margins once again."

The stock is expected to deliver 26% over the next one year and has analysts' buy ratings of 88%. The stock is trading at 19 times its estimated 2011 earnings.

3. Halliburton ( HAL) provides services related to exploration and production of oil and natural gas.

Net income for the first quarter of 2011 more than doubled to $511 million, compared to $206 million in the corresponding quarter of the prior year. Strong North American performance churned robust top-line growth during 1Q11. Consolidated revenue increased to $5.3 billion from $3.8 billion in the year-ago quarter.

Delineating the future strategies, Dave Lesar, chairman, president and CEO of Halliburton, said in a press statement, "We continue to commercialize core technologies, win key contracts, and make the necessary investments to ensure that we gain momentum as the industry enters the projected up cycle. We remain focused on global growth markets including deepwater, unconventional resources, and mature fields. We have made progress on this strategy, as evidenced by a number of recent contract awards."

Of the 37 analysts covering the stock, 33 recommend a buy. Analysts are positive on the stock and expect it to deliver 27% in the next one year. The stock is trading at 15.8 times its estimated 2011 earnings.

2. El Paso Pipeline Partners ( EPB) owns and operates natural gas transportation pipelines and storage assets in the U.S.

The company recently proposed to acquire an additional 22% stake in Southern Natural Gas for $587 million, taking its share to 82%.

Net revenue for fourth quarter and full year 2010 jumped 14% and 20% to $352 million and $1.34 billion, respectively. Net income for the fourth quarter and full year 2010 rose 5% and 19%, respectively.

The company's 2011 adjusted earnings before interest, tax, and depreciation target is $895 million to $920 million, higher than 2010. The stock has analysts' buy ratings of 92% and is likely to return 13% in the next one year. The stock is trading at 16 times its estimated 2011 earnings.

1. Energy XXI (Bermuda) ( EXXI) is an independent oil and natural gas exploration and production company with business interests in the U.S. Gulf coast and Gulf of Mexico.

For 2011 fiscal third quarter, Energy XXI reported earnings before interest, tax, and depreciation of $155.4 million, compared to $87.3 million during the year-ago quarter. Net profit was $14 million on revenue of $259 million and production of 41,400 boe per day during fiscal 2011 third quarter. The results include contribution from the acquisition of ExxonMobil Gulf of Mexico properties.

The company has strengthened its balance sheet, reducing $80 million in debt during the quarter. Of the 13 analysts covering the stock, 12 rate a buy. The stock is expected to return 10% in the next one year, according to analysts' consensus estimates. The stock is trading at 15.3 times its estimated 2012 earnings.

>>To see these stocks in action, visit the 10 Energy Stocks With Top Buy Ratings portfolio on Stockpickr.