Shares of Fluor Corp rose to an all-time high on Monday, a day after reports that the big U.S. engineering and construction company was still in talks with Kuwait National Petroleum Co (KNPC) for parts of a tender for its planned 615,000 barrels per day al-Zour refinery.

KNPC on Saturday named around 19 firms pre-qualifying for four packages for the refinery construction to be completed in 2012.

The whole tender, which is due be launched in the fourth quarter, is worth around $14 billion, more than twice the initial estimate.

Several industry sources told Reuters on Sunday that Fluor was still negotiating with the state refinery on a package to provide steam generation, water systems and other infrastructure for the processing, with one of them saying the deal was worth around $2 billion.

They might get it but it's not final, said the source who declined to be identified. Fluor already holds the project management contract for the refinery tender.

A spokesman for Texas-based Fluor declined to comment.

Fluor shares rose as high as $150.34, before trading up $5.32, or 3.7 percent, at $149.30 in late trading on the New York Stock Exchange.

(Reporting by Leonard Anderson)