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U.S. Department of Energy
Office of Scientific and Technical Information

Oil well spacer fluids

Patent ·
OSTI ID:7048659
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/sup 0/F for extended periods.
Assignee:
Halliburton Co
Patent Number(s):
US 4217229
OSTI ID:
7048659
Country of Publication:
United States
Language:
English