Sept 21 (Reuters) - Calfrac Well Services Ltd:
* Moody's reviews Calfrac's ratings for possible downgrade COPYRIGHT Copyright Thomson Reuters 2009. All rights reserved. The copying, republication or redistribution of Reuters News Content, including by framing or similar means, is expressly prohibited without the prior written consent of Thomson Reuters.
* Moody's reviews Calfrac's ratings for possible downgrade COPYRIGHT Copyright Thomson Reuters 2009. All rights reserved. The copying, republication or redistribution of Reuters News Content, including by framing or similar means, is expressly prohibited without the prior written consent of Thomson Reuters.
