This week was a a good one for energy investors. Not only did oil prices continue to stabilize, but many energy companies reported stronger than expected first-quarter results.  

If fact, those results helped fuel gains of 20%, or more, in the stock prices of several energy-related companies during the past week. Three of the top gainers, according to S&P Capital IQ data, were CARBO Ceramics (NYSE:CRR)Pioneer Energy Services Corp. (NYSE:PES) and Clean Energy Fuels Corp. (NASDAQ:CLNE). To learn what fueled these gains, check out the slideshow below.

Matt DiLallo has no position in any stocks mentioned. The Motley Fool recommends Clean Energy Fuels. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.