Summary Companies U.S. crude stockpiles draw unexpectedly -EIA Larger-than-expected drop in U.S. gasoline stocks -EIA Russian output down 300,000 bpd in first 3 weeks of March DNO shuts Kurdistan output, Iraq halts exports via Turkey HOUSTON, March 29 (Reuters) - Oil edged lower on Wednesday in choppy trading as investors looked to pocket profits from two straight days of gains, and as markets debated supply tightness. Brent crude closed 37 cents, or 0.5%, lower at $78.28 a barrel, while West Texas Intermediate crude fell 23 cents, or 0.3%, to $72.97. "The markets are trying to find equilibrium," said Dennis Kissler, senior vice president of trading at BOK Financial, noting heavy fund buying over the last two days. On the supply side, worries of tightness after an unexpected draw in U.S. oil stockpiles and a halt to some Iraqi Kurdistan oil exports were partially offset by a smaller-than-expected output cut in Russia. U.S. crude oil stockpiles fell unexpectedly last week, the...