Drilling fluid and method for drilling in coal-containing formations

United States of America Patent

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Mar 5, 2013
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Apr 15, 2010
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Mar 3, 2008
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Mar 2, 2007

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Abstract

A drilling fluid and method for drilling in a coal containing formation. The method includes: providing a mixed metal-viscosified drilling fluid including at least 1% potassium salt; circulating the drilling fluid through the well; and drilling into a coal seam.

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Patent Owner	Address
CANADIAN ENERGY SERVICES L P	1400 700 - 4TH AVENUE SW CALGARY T2P 2X6

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Inventor Name	Address	# of filed Patents	Total Citations
Smith, Carl Keith	Calgary, CA	16	211
Stoian, Stefan Alexandru	Calgary, CA	6	59

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Drilling fluid and method for drilling in coal-containing formations

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United States of America Patent

12529583

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PATENT NO	8387723
APP PUB NO	20100089650A1
SERIAL NO	12529583
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
March 05, 2013	US,8387723,B2 US8387723B2	GRANTED PATENT AS SECOND PUBLICATION
April 15, 2010	US,20100089650,A1 US20100089650A1	FIRST PUBLISHED PATENT APPLICATION

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12529583

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