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Drill Casings

Drill Casings

Drill Casings

(OP)
I was recently given a drill casing specification by my client that specified H40 7 inch production casing 16 lb/ft and a H40 10.75 inch surface casing 22 lb/ft.  However, I have been unable to find any reference to the above mentioned casing.  The closest match I have found is 17 lb/ft on the 7" casing and 32 lb/ft on the 10.75" casing.

Does anyone know if the lighter wall casings exist?

Any assistance would be greatly appreciated.

Thanks

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