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 · section widths at true radial scale

ControlledCASE-ENV-001 v1.0.0

1× · arrows pan, +/− zoom, 0 resets, m measures

Figure data

Recorded casing sections behind the casing program figure
Section	OD (in)	Wall (in)	SMYS (ksi)	Top (ft)	Shoe (ft)
Upper 9 5/8 in reference section (governing)	9.625	0.545	110	0	4,000
Lower 7 in reference section	7	0.408	110	4,000	10,000

Utilization versus depth

Evacuation reference case · unity is the entered screening limit

ControlledCASE-ENV-001 v1.0.0

Figure data

Utilization by station for the governing load case
MD (ft)	Collapse	Tension	Triaxial
0	0	0.6588	0.6145
250	0.0372	0.6424	0.6162
500	0.0743	0.6259	0.6188
750	0.1115	0.6094	0.6224
1,000	0.1487	0.5929	0.6269
1,250	0.1858	0.5765	0.6322
1,500	0.223	0.56	0.6385
1,750	0.2602	0.5435	0.6456
2,000	0.2973	0.5271	0.6535
2,250	0.3345	0.5106	0.6622
2,500	0.3717	0.4941	0.6716
2,750	0.4088	0.4776	0.6818
3,000	0.446	0.4612	0.6927
3,250	0.4831	0.4447	0.7042
3,500	0.5203	0.4282	0.7164
3,750	0.5575	0.4118	0.7292
4,000	0.4897	0.7226	0.9942
4,250	0.5123	0.6925	0.9846
4,500	0.5349	0.6624	0.9755
4,750	0.5575	0.6323	0.967
5,000	0.5801	0.6022	0.9591
5,250	0.6028	0.572	0.9517
5,500	0.6254	0.5419	0.945
5,750	0.648	0.5118	0.9388
6,000	0.6706	0.4817	0.9333
6,250	0.6932	0.4516	0.9284
6,500	0.7158	0.4215	0.9241
6,750	0.7384	0.3914	0.9205
7,000	0.761	0.3613	0.9176
7,250	0.7836	0.3312	0.9153
7,500	0.8063	0.3011	0.9137
7,750	0.8289	0.271	0.9127
8,000	0.8515	0.2409	0.9125
8,250	0.8741	0.2108	0.9129
8,500	0.8967	0.1806	0.914
8,750	0.9193	0.1505	0.9157
9,000	0.9419	0.1204	0.9181
9,250	0.9645	0.0903	0.9212
9,500	0.9871	0.0602	0.925
9,750	1.0097	0.0301	0.9294
10,000	1.2536	0	0.9598

Unity is the entered screening limit, not a code allowable.

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

Worksheet nameTop / depth referencePressure referenceCasing shoe MD

Max calculation interval

Entered design factors

Pipe-body burstPipe-body collapsePipe-body tensionPipe-body compressionTriaxial yieldConnection internal PConnection external PConnection tensionConnection compression

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.

Top MD

Bottom MD

Nominal OD

Nominal wall

Minimum yield strength

Elastic wall basisAnalysis wall factorControlled burst rating

Controlled collapse rating

Pipe-body tension rating

Pipe-body compression rating

Pipe-body rating source / revisionCondition / derating note

Connection nameConnection qualification / reference

Connection internal POptional

Connection external POptional

Connection tensionOptional

Connection compressionOptional

Top MD

Bottom MD

Nominal OD

Nominal wall

Minimum yield strength

Elastic wall basisAnalysis wall factorControlled burst rating

Controlled collapse rating

Pipe-body tension rating

Pipe-body compression rating

Pipe-body rating source / revisionCondition / derating note

Connection nameConnection qualification / reference

Connection internal POptional

Connection external POptional

Connection tensionOptional

Connection compressionOptional

Direct load cases

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

Category / lifecycle phaseControlled case reference

Load stations

01MD

Internal pressure

External pressure

Effective axial force

Bending stress

02MD

Internal pressure

External pressure

Effective axial force

Bending stress

03MD

Internal pressure

External pressure

Effective axial force

Bending stress

Case notesOptional

Category / lifecycle phaseControlled case reference

Load stations

01MD

Internal pressure

External pressure

Effective axial force

Bending stress

02MD

Internal pressure

External pressure

Effective axial force

Bending stress

03MD

Internal pressure

External pressure

Effective axial force

Bending stress

Case notesOptional

Engineering notesOptional

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.