Non toxic, biodegradable well fluids
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United States of America Patent
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Mar 12, 1996
Grant Date -
N/A
app pub date -
Sep 29, 1993
filing date -
Sep 29, 1993
priority date (Note) -
Expired
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Abstract
Well fluids such as drilling muds, especially useful in offshore drilling, are formulated with a hydrocarbon oil blend of a low viscosity poly alpha-olefin (PAO) such as a low molecular weight oligomer of decene together with a C.sub.10 to C.sub.18 paraffinic hydrocarbon of petroleum origin and a C.sub.10 to C.sub.18 olefin such as dodecene-1 or tetradecene-1. The fluids exhibit good biodegradability and are non-toxic to marine organisms; they also meet viscosity and pour points specifications for formulation into oil based muds.
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