Inventor
ZWALD EDWIN A
US7 patents
Patents
7 patentsUS7172019B2Feb 6, 2007
Method and apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO33 citations96
US7363691B2Apr 29, 2008
Method and apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO23 citations92
US7204007B2Apr 17, 2007
Method and apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO14 citations92
US7201223B2Apr 10, 2007
Method and apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO14 citations92
US7146702B2Dec 12, 2006
Method and apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO23 citations92
US7308755B2Dec 18, 2007
Apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO10 citations84
US7363690B2Apr 29, 2008
Method and apparatus for forming a mono-diameter wellbore casing
SHELL OIL CO5 citations73