Method of making a drilling fluid containing carbon black in a dispersed state
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United States of America Patent
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May 19, 1992
Grant Date -
N/A
app pub date -
Feb 22, 1990
filing date -
Feb 22, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the manufacture of a water based drilling fluid additive comprising the steps of: (a) mixing hydrophobic carbon black and either a surfactant or a dispersant and (b) shearing the mixture of step (a) under a sufficiently high mechanical shear for a sufficient time to convert the hydrophobic carbon black into hydrophilic carbon black. This invention is also directed to a water based drilling fluid additive prepared according to the above process and the use of the additive in a water based drilling fluid.
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