Zion Oil & Gas Inc (ZNOG): Then why are they using such large diame...

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Re: JasonBourne post# 3566

Tuesday, 08/01/2017 9:36:06 PM

Tuesday, August 01, 2017 9:36:06 PM

Then why are they using such large diameter casing?

"The widest type of casing is called conductor pipe, and it usually is about 30 to 42 inches in diameter for offshore wells and 16 inches in diameter for onshore wells."
http://www.rigzone.com/training/insight.asp?insight_id=333

This well used 30 inch conductor casing and 20 inch surface casing... Now they are installing 13 3/8 inch intermediate casing and planning to install another intermediate casing of 9 5/8 inches further down... So the final (production) casing will be 5 1/2 inches... I think the reason they need so many layers of casing is because they are drilling through so many high-pressure production zones!

-Bliss

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