Wells – Processes – Cementing – plugging or consolidating
Patent
1990-04-20
1991-05-07
Suchfield, George A.
Wells
Processes
Cementing, plugging or consolidating
106729, 530501, E21B 3314
Patent
active
050128701
ABSTRACT:
A hydraulic cement slurry is disclosed which has low fluid loss properties. In addition to water and hydraulic cement, the hydraulic cement slurry contains a fluid loss control additive comprising a sulfonated or sulfomethylated kraft lignin that has been aminated by reacting it with a polyamine and an aldehyde. The slurry also contains sodium carbonate, sodium phosphate, sodium sulfite, sodium metasilicate or naphthalene sulfonate.
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McDaniel Terry B.
Reece IV Daniel B.
Schmalz Richard L.
Suchfield George A.
Westvaco Corporation
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