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Oil & Gas ProPermalink Reply by Les Bamburg on September 3, 2010 at 9:09

LWC,

Line 1 - 7 & 5/8 inch diameter casing set to 12302 ft depth in a drilled hole with a 9 & 7/8 inch diameter. This would be the intermediate casing string installed in the vertical section of the welbore before drilling curve and horizontal lateral. Cemented in place and tested to 7600 psi of pressure (for 3 minutes?).

Line 2 - 10 & 3/4 inch diameter casing set to 2120 ft depth in a drilled hole with a 13 & 1/2 inch diameter. This would be the surface casing string. Cemented in place and tested to 1500 psi of pressure (for 30 minutes?).

The casing weight just gives some indication of the thickness but I will leave that to a drilling expert.

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landownerPermalink Reply by FXEF on September 3, 2010 at 10:32

LWC,

7-5/8 casing with 29.70 lbs/ft weight has a wall thickness of 0.375 inches and inside diameter of 6.875 inches.

10-3/4 casing with 45.50 lbs/ft weight has a wall thickness of 0.400 inches and inside diameter of 9.950 inches.

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Permalink Reply by LWC on September 3, 2010 at 17:04

Les B and FXEF thank you very much. I figured some of this out but was unclear about the test pressure/time. Thanks again.

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