Baker Hughes international rig count for last month was 1,158, down 44 from the 1,202 counted in April.
The number was also down 192 from the 1,350 counted at the same time last year.
The international offshore rig count for May 2015 was 284 down 16 from the 300 counted in April 2015 and down 42 from the 326 in the same time last year.
Baker Hughes said the average US rig count for May 2015 was 889, down from 976 counted in April 2015 and down 970 from the 1,859 counted in May 2014.
The average Canadian rig count for May 2015 was 80, down 10 from the 90 counted in April 2015 and down 82 from the 162 counted in May 2014.
The worldwide rig count for May 2015 was 2,127, down 141 from the 2,268 counted in April 2015, and down 1,244 from the 3,371 counted in May 2014.
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