Oil well spacer fluids

Details Oil well spacer fluids Oil well spacer fluids

C - Chemistry, Metallurgy

09

K

31/11

C09K 8/90 (2006.01) C09K 8/20 (2006.01) C09K 8/22 (2006.01) C09K 8/60 (2006.01)

Patent

CA 1082906

OIL WELL SPACER FLUIDS ABSTRACT A high stability, nondamaging spacer fluid is provided containing readily available weighting agents such as calcium carbonate and iron carbonate dispersed in water using a polymer viscosifier, a salt inhibitor, a primary sulfonated dispersant and a secondary fatty acid amide dispersion. Conventional high density weighting agents can also be used. The spacer fluid is stable over a temperature range of about 32°-300°F for extended periods with densities ranging from 11 to 17.6 pounds per gallon.

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