4Robert Brooks, SPE, Jack Newberry, SPE, Paul Cook, SPE, and Franck Wendlinger, SPE, TAM International Inc. Preventing Annular Gas Flow In Conjunction With 2 Stage Cementing[ R]. SPE 116447 - MS 2008.
5Zaki E1 Zaghaty S, ADMA - OPCO ; O 'Driscoll K P, BJ Services Co. Middle East. New Cementing Technique for Khuff Gas Wells[ R]. SPE 49480 - MS 1998.
