By Rod Walton, Tulsa World, Okla. Jul. 23--Read a previous SemGroup story and court filings. After a tumultuous ascent from Tulsa startup to fast-growing energy giant, SemGroup LP came in for a crash landing Tuesday, as the company filed for Chapter 11 bankruptcy protection in Delaware.

SemGroup Energy Partners, L.P. (NASDAQ: SGLP) today reported net income of $7.3 million, or $0.31 per basic and diluted common unit, for the fourth quarter ended December 31, 2007. Revenues for the same period were $30.2 million.