Coupling tubulars

United States of America Patent

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Aug 25, 2009
Grant Date
Jan 10, 2008
app pub date
Jun 8, 2006
filing date
Jul 6, 2002

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Abstract

An expandable coupling arrangement for coupling first and second tubulars includes a male thread portion on an end of the first tubular and a female thread portion on an end of the second tubular. The thread portions comprise dovetail threads having flanks, roots and crests, wherein the flanks are inclined at an angle of greater than 10°.

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WEATHERFORD TECHNOLOGY HOLDINGS, LLC

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Inventor Name	Address	# of filed Patents	Total Citations
Duggan, Andrew Michael	Aberdeen , GB	10	191
Glover, Neil James	Aberdeen , GB	2	65
Harrall, Simon John	Inverurie , GB	35	698
Metcalfe, Paul David	Petercutter , GB	53	2748
Simpson, Neil Andrew Abercrombie	Aberdeen , GB	74	2640
Stephenson, David	Dubai , AE	48	1653

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Coupling tubulars

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United States of America Patent

11449571

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PATENT NO	7578043
APP PUB NO	20080007060A1
SERIAL NO	11449571
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
August 25, 2009	US,7578043,B2 US7578043B2	GRANTED PATENT AS SECOND PUBLICATION
January 10, 2008	US,20080007060,A1 US20080007060A1	FIRST PUBLISHED PATENT APPLICATION

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11449571

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