NON-AQUEOUS DRILLING ADDITIVE USEFUL TO PRODUCE A FLAT TEMPERATURE-RHEOLOGY PROFILE
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Nov 19, 2010
filing date -
Nov 19, 2010
priority date (Note) -
Abandoned
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Abstract
A method of providing a substantially constant equivalent circulating density of a drilling fluid over a temperature range of about 120° F. to about 40° F. includes adding a drilling fluid additive to the drilling fluid, wherein the drilling fluid additive includes the reaction product of a carboxylic acid with a single carboxylic moiety; and a polyamine having at least two primary amino functionalities and optionally at least one secondary amino functionality.
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