UPDATE 7-Ida soaks US Gulf Coast, disrupts energy output

(For full coverage of Ida, click [ID:nN09265408])

* U.S. oil, gas production disrupted by Ida

* Ida weakens from hurricane to tropical storm

* Storm soaks four states on U.S. Gulf Coast (Updates position, adds details, quotes)

By Kelli Dugan

MOBILE, Ala., Nov 9 (Reuters) - A weakened Tropical Storm Ida drenched the U.S. Gulf Coast and oil installations on Monday, shutting down nearly 30 percent of Gulf energy production.

The center of the ragged storm was expected to cross the coast near Mobile, Alabama, early on Tuesday.

At one time a Category 2 hurricane, Ida's threat eased as winds dropped to 65 miles per hour (100 km per hour). Ida was forecast to weaken quickly as it moved inland, turning east over northern Florida.

A U.S. Coast Guard helicopter plucked two workers from a storm-damaged oil rig south of New Orleans. Ida is blamed for 124 flood and mudslide deaths in El Salvador.