Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Last year's oil disaster in the Gulf of Mexico crippled most of the region's offshore-drilling industry, battered the coast's economy and hobbled one of the world's most powerful oil companies, BP PLC. 
  
 Yet a year later, one central player in the Deepwater Horizon disaster remains largely unscathed: Halliburton Co. 
  
 Aside from BP, the primary owner of the blown-out Macondo well, no company has faced more criticism for the deadly explosion and resulting oil spill than Halliburton. One of several service providers on the Deepwater Horizon drilling rig, it designed the failed cement seal that experts believe allowed explosive gas to ... ||||| Halliburton's net income more than doubled during the first three months of the year the company said Monday, as drilling activity in North America picked up. 
  
 The price for a barrel of oil has jumped 17 percent this year, boosting demand sharply for companies like Halliburton, which provide a variety of services for oil and natural gas drillers. 
  
 The Houston company reported first-quarter earnings of $511 million, or 56 cents per share, compared with $206 million, or 23 cents per share, in the same period last year. Revenue rose 40 percent to $5.28 billion. 
  
 After adjusting for a $46 million charge related to international sanctions on oil operations in Libya, Halliburton said it earned 61 cents per share. 
  
 Analysts had expected earnings of 58 cents per share on revenue of $4.87 billion, according to FactSet. 
  
 Halliburton Co. posted a big revenue gains despite a slowdown in offshore drilling in the Gulf of Mexico and political turmoil in North Africa that halted oil production in Libya. The company said an "unabated shift" by the industry to developing oil on land, particularly in underground shale deposits in the U.S., more than offset that decline in activity. 
  
 Revenue in North America surged 75 percent in the quarter while revenue from international operations increased 11 percent, according to the company. Completion and production revenue jumped 62 percent to $3.2 billion due to increased drilling activity in the U.S. Drilling and evaluation revenue increased 17 percent to $2.1 billion as activity picked up in the western hemisphere and Iraq. 
  
 The rebellion in Libya will continue to hinder oil operations in the country, but overall, Halliburton President and CEO Dave Lesar said those projects will eventually return to normal. 
  
 "We remain very optimistic about this market and expect to be profitable in 2011," Lesar said. 
  
 Shares increased 31 cents to $47.13 in premarket trading. |||||
Output:
Despite challenges arising from political unrest in the Arab world, Halliburton's net income has more than doubled during the first quarter of 2011. The oil-field services company credits the soaring earnings to an increase in unconventional North American oil and natural-gas drilling; the AP reports that North American revenue jumped 75%, while revenue from international operations was up 11%. The Wall Street Journal notes that high oil prices also helped. Halliburton's first-quarter profit was $511 million, up from $206 million a year prior.