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Petromium Tools / Formula set CASE-ENV-001

Casing Load Envelope

Direct lifecycle loads · controlled ratings · Lamé / von Mises audit· V2.0

Context
Units
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Animated load screening

Casing wall and utilization envelope

Casing program

surface · nested sections and governing interval

01,0002,0003,0004,0005,0006,0007,0008,0009,00010,000MD (ft)SURFACETD 10,000 ftUpper 9 5/8 in reference section9.625 in OD × 0.545 in wallSMYS 110 ksi · shoe 4,000 ftLower 7 in reference section7 in OD × 0.408 in wallSMYS 110 ksi · shoe 10,000 ftGOVERNING CONNECTION EXTERNAL PRESSURESHALESANDLIMESELECTED WALL STATEU 1.35Pi 1,200 psiPo 9,000 psiVME 84.5 ksi

Utilization versus depth

Evacuation reference case · unity is the entered screening limit

00.30.60.91.21.602,0004,0006,0008,00010,000Utilization ratioMD (ft)UNITY 1.0BurstCollapseAxialVME

Review · not an approval

Governing screening point

Factored utilization

1.35

Mode

connection external pressure

Measured depth

10,000 ft

Load case

Evacuation reference case

The governing point is a mathematical maximum against entered ratings and factors. It is not a casing, connection, pressure-test, or operating approval.

Loads, ratings, and factors remain separate

Casing envelope worksheet

Entered design factors

Factors modify utilization and reserve only. Values below 1.0 remain visible and produce a review warning.

Casing sections — top downward

Controlled ratings and their source remain separate from geometry-derived audit references.

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02

Direct load cases

No gas kick, hydrostatic, cementing, evacuation, thermal, shock, piston, or APB profile is inferred.

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Load stations

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Load stations

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Calculation complete

Calculation audit

1 warnings

Max burst demand

8,000 psi

Max collapse demand

7,800 psi

Max tension

900 klbf

Max VME

87.5 ksi

Governing section: Upper 9 5/8 in reference section. Controlled rating provenance remains in every export.

Calculation observations

DIRECT_LOAD_PROFILES

All pressure, effective axial force, and bending-stress profiles are direct user entries with linear interpolation; the tool does not generate lifecycle load cases.

CONTROLLED_RATINGS_REQUIRED

Entered pipe-body and connection ratings remain controlled inputs; typed size, wall, or grade text does not establish API/ISO compliance.

VME_NOT_COLLAPSE_RATING

Collapse demand is compared with the entered controlled collapse rating. Elastic von Mises stress is not a substitute for collapse-instability resistance.

Operational warning: verify the controlled design basis, lifecycle cases, current certified ratings, connection envelope, wear/corrosion, environment, pressure-area and thermal effects, and required factors. VME does not replace collapse or connection qualification.
CASE-ENV-001 v1.0.0 · Lamé thick wall · von Mises elastic screenReference example loaded — replace every value and rating with controlled project data.