Fishing Calculator (Pipe Yield, Safe Pull, Jar Impact)

Before jarring or pulling on a fish, know how much you can safely pull. The fishing tools calculate pipe body yield, usable overpull after string weight and design factor, and jar impact.

Formulas

Pipe body yieldPy = π/4 × (OD² − ID²) × Ym

Safe pullMax overpull = Py × DF − Buoyed string weight

Worked example

GIVEN

5" DP, ID 4.276"
Grade G-105 (105,000 psi)

WORKING

Area = 0.7854 × (25 − 18.284) = 5.275 in²
Py = 5.275 × 105,000

Pipe body yield ≈ 553,900 lbf

FAQ

What design factor should I use?

Many operators limit to 80–90% of yield for new pipe and lower for premium/class 2 pipe.

Run it with your well data

Field & Metric units, works offline, save and share results with your crew.

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Reference only. Always verify against your company procedures and well-control certification.