For the quarter ended June 30, Halliburton's net income totaled $679 million, or 73 cents per share. A year ago, earnings were $737 million, or 79 cents per share.
Analysts had been expecting 72 cents per share, according to FactSet.
Overall revenue edged up 1 percent to $7.32 billion from $7.23 billion a year ago, also topping expectations despite an 8 percent revenue slide in North America. Total revenue, even with the decline in North America, was an all-time best for the second quarter.
Halliburton faces growing competition in a contentious part of its business: hydraulic fracturing or "fracking," which is the process of using chemicals and water under high pressure to crack open rock formations and release oil and natural gas. The technique has helped spur production in shale deposits but has come under fire from environmentalists, who charge that it threatens underground water supplies.
Halliburton moved to defuse some of that criticism last week by striking a deal with Nuverra Environmental Solutions Inc. to develop ways to increase the use of recycled wastewater.
And on Friday a landmark federal study showed no evidence that chemicals from the natural gas drilling process had contaminated drinking water aquifers at a western Pennsylvania drilling site. Although the study is ongoing and the results are still preliminary, it was the first independent look at whether toxic chemicals used in fracking pose a threat to people during normal drilling operations.
Shares of Halliburton Co. rose 2 cents to $45.85 before the opening bell.