Wells – Processes – With indicating – testing – measuring or locating
Patent
1993-08-13
1994-12-06
Suchfield, George A.
Wells
Processes
With indicating, testing, measuring or locating
166292, 166293, E21B 33138, E21B 3314, E21B 4706
Patent
active
053701810
ABSTRACT:
A casing or liner in a wellbore penetrating a zone having high formation gas pressure is cemented with a cementitious slurry comprising blast furnace slag. In one embodiment the cementitious slurry is made by combining blast furnace slag and a drilling fluid. Also, a method for plugging or setting sidetracking plugs and other secondary cementing operations in a wellbore penetrating a zone having high gas formation pressure comprising placing a mass of blast furnace slag cementitious slurry at a preselected location and allowing the slurry to set.
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"Mud to Cement Technology Proven in Offshore Drilling Project", by Javanmardi et al., Oil & Gas Journal, Feb. 15, 1993, pp. 49-57.
"Conversion of Drilling Fluids to Cements with Blast Furnace Slag--Performance Properties and Applications for Well Cementing", SPE Paper 24575, Cowan et al (Oct., 1992).
Javanmardi Kazem
Nahm James J. W.
Shell Oil Company
Suchfield George A.
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