(Reuters) -Oilfield services provider Baker Hughes surpassed Wall Street expectations for second-quarter profit on Tuesday, helped by robust demand for its natural gas services even as it warned of a drop in spending by oil producers. Baker Hughes joined its U.S. rivals Halliburton and SLB in warning of a slowdown in upstream activity and spending, as producers grapple with weakness and volatility in commodity prices. In North America, upstream spending is expected to be down in the low-double digits, Baker Hughes said on Tuesday, while international spending could be down in the high-single digits. However, the Big 3 oilfield services firms are concentrating on pockets of resilience such as LNG infrastructure, power grid upgrades and data center-driven power demand to weather a slower, more uneven recovery.