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VAM® MUST is a flush premium casing for shifting
salt domes and high collapse applications. As VAM® MUST has same OD as the
couplings of the associated T&C casing for the same drift requirement, it
may therefore be inserted in a casing string only in the section of the high
collapse pressure area without changing any drilling parameters. VAM® MUST
is the reference for salt dome applications.
| BENEFITS |
- Heavier wall thickness for maximum collapse resistance
- Gas tight under combined load with external pressure
- Internally and externally flush
- Increased wall thickness but same drift and same clearance as the associated
T&C casing |
 Integral
flush design
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VAM® MUST is an integral connection threaded on coupling stock mother pipes
with the OD of the couplings of the casing string used. Typically 10
¾" OD with 9 5/8" strings or 7 5/8" OD for 7"
strings.
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100% tension joint efficiency under tension compared to the associated T&C
casing string
Multiple
Seal System
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An external seal and an internal seal work independently of each other to
achieve sealing against internal pressure and external pressure up to 100% of
the rated burst and collapse for the coupling stock mother pipe body.
Improved
Thread Design
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Thread load flank has a 9° reverse angle to resist jump-out.
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Thread stabbing flank has a 20° angle for fast, trouble-free make-up.
Internal
Reverse Angle Torque Shoulder
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The reverse angle torque shoulder provides a positive torque stop, which allows
accurate power tight make-up.
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The reverse angle of the shoulder increases the internal seal contact pressure
achieving excellent gas tightness under internal pressure.
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The combination of the reverse angle torque shoulder and the 9° load flank
of the threads creates a "wedge" effect which improves the structural
strength of the connection.
Streamlined
Internal and External Profile
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The OD and ID is 100 % flush (no upset).
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The ID is bored and recess-free for smooth, efficient flow.
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The OD is turned to tight tolerance.
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