Spacer fluids

Details Spacer fluids Spacer fluids

E - Fixed Constructions

21

B

166/17, 31/21

E21B 33/14 (2006.01) C04B 24/28 (2006.01) C04B 28/02 (2006.01) C09K 8/42 (2006.01) C09K 8/46 (2006.01) C09K 8/60 (2006.01)

Patent

CA 2030489

Spacer fluids providing an effective buffer between drilling fluids and cement slurries during well completion. The spacer fluids comprise a sulfonated styrene copolymer dispersant and one or more additional components such as surfactants, viscosifiers arid weighting materials to form a rheologically compatible fluid between the drilling fluid and the cement slurry.

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