Precision Drilling (PDS) reported a Q2 loss Tuesday of 0.52 Canadian dollars ($0.37) per diluted share, swinging from earnings of CA$1.07 a year earlier.
An analyst polled by FactSet expected a loss of CA$0.01.
Revenue for the quarter ended June 30 was CA$452.8 million, compared with CA$406.6 million a year earlier.
Analysts expected CA$441.3 million.