Drilling fluid containing a surfactant having a high boiling point and a long chain tail group
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United States of America Patent
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Mar 7, 2017
Grant Date -
Feb 27, 2014
app pub date -
Sep 23, 2013
filing date -
Feb 21, 2012
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Abstract
According to an embodiment, an invert emulsion drilling fluid comprises: an external phase, wherein the external phase of the drilling fluid comprises a hydrocarbon liquid; an internal phase, wherein the internal phase of the drilling fluid comprises water; and a surfactant, wherein the surfactant: (A) comprises a hydrophobic tail group having a carbon chain length greater than or equal to 16; (B) has a boiling point greater than or equal to 400° F. (204.4° C.); and (C) is in at least a sufficient concentration such that the surfactant spontaneously forms reverse-micelles. According to another embodiment, a method of using the invert emulsion drilling fluid comprises: introducing the drilling fluid into a well.
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