Schlumberger said last week that investments by oil producers in international markets will increase by 7 percent to 8 percent this year, citing a 20 percent increase last quarter in offshore rig counts and growing exploration activity in Latin America, Africa and Asia.

Halliburton's international revenue rose 11 percent in the first quarter, driven by gains in Mexico, Argentina and the Middle East. It also reiterated its expectation of high single-digit growth for 2019.

(Reporting by Debroop Roy and Arathy S Nair in Bengaluru; Editing by Maju Samuel)