Halliburton said last week that its earnings could be negatively impacted because of bottlenecks related to the supply of frac sand used in shale drilling. The Wall Street Journal reported that Halliburton’s shares were briefly halted on February 15 after Halliburton’s CFO Chris Weber told an audience at the Credit Suisse Energy Summit that the company’s first quarter earnings could take a hit by a whopping 10 cents per share. The reason, he said, was because of delays by Canadian rail companies that would slow the delivery of frac sand. Halliburton saw its shares drop by more than 2 percent on a day that saw broader gains to the S&P 500. Frac sand is integral to growing shale production, increasingly so these days with more and more sand pumped down into a well. Shale drillers have credited the heavy doses of sand with squeezing out more oil and gas […]