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What is the difference between “Pre-firing Total Pull” and “Post-firing Total Pull” which are listed in the jar specifications table?

April 26, 2017difference jar specifications Table total

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What is the difference between “Pre-firing Total Pull” and “Post-firing Total Pull” which are listed in the jar specifications table?

1 Answer

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10 Posted

A5: “Pre-firing Total Pull” refers to the maximum pull allowed when the jar is metering hydraulically. “Post-firing Total Pull” refers to the tensile strength of the jar, and is the maximum tensile load that can be applied to the drilling jar after an impact.