Polyamine fluid loss additive for oil well cements

Details Polyamine fluid loss additive for oil well cements Polyamine fluid loss additive for oil well cements

E - Fixed Constructions

21

B

31/19

E21B 33/14 (2006.01) C04B 28/02 (2006.01) C09K 8/46 (2006.01)

Patent

CA 1206738

ABSTRACT OF THE DISCLOSURE An aqueous cement composition is shown for cementing the annular space between a pipe and the surrounding bore in a well. The cement composition includes a hydraulic cement, water present in an amount effective to produce a pumpable slurry, a polyamine fluid loss additive, and a sulfonated polymer. By neutralizing the polyamine to a pH of approximately 7, improved free water and fluid loss properties are imparted to the system.

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