Article: Completion With 4''1/2 & 9''5/8 Casings

[boussis]

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[Trostis]

No best way...each well is different. With the little data you provide, I can't see whether it's a good or bad idea to complete with 4 1/2" and 9 5/8". Maybe 4 1/2" inside 9 5/8" is not better, just cheaper.Depth, deviation, pressure, temperature, sweet/sour gas...?Regards.

[nedo]

I think , you can help you simulation in pipesim software your quastion depende on pressure & temperature you want on welhead .so you can work linear 7" only not casing 7" then production by 3.5" ref. uperbelow.this is lower cost and very good production nedo

[shodji]

If the 9 5/8" casing is already in place, and you had already bought the 4 1/2" tubing, then so be it. Dimension wise it shouldn't be a problem. Although cost-wise 9 5/8" casing strings are obviously costly than a 7" casing (of the same grade) together with its related surface equipments.On another note, had you performed a Nodal Analysis to determine the optimum tubing size? You might probably need a larger or smaller tubing depending on the wellbore conditions.