- OCTG
Connection List
The connection list gives you access to the VAM® and NSMAXᵀᴹ product lines. Because not all products can be listed, such as fit-for-purpose or so-called isolated products, please contact Nippon Steel engineer in case the VAM® or NSMAXᵀᴹ connection you are looking for is not listed.
VAM® TOP HC (High Compression) is a T&C connection based on the main features of the VAM® TOP connection. This connection has been designed for various High Compression applications where it may be necessary to apply extreme compressive loads to the string (Elevated temperature inducing compression, compaction, subsidence …)
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Applicable range
- VAM TOP HC is available from 5" to 7 3/4"
- All API weights, and beyond
- Carbon steel, Martensitic, Duplex and Nickel base Alloy material
- Yield strengths from 80 ksi to 140 ksi in particular
New Metal-to-Metal Seal
- A patented metal-to-metal seal system offers from 5" to 7 3/4" excellent gas tight sealing even under the most severe combined loads
- Sealing integrity remains constant despite repeated make-ups and break-outs.
- Seal geometry protects against galling.
Reverse Angle Torque Shoulder
- A reverse angle torque shoulder provides a positive torque stop which allows for accurate power tight make-up and minimizes hoop stresses in the connection.
- The wedge effect caused by the reverse angle gives the connection superior structural strength.
- The shoulder design was optimized in order to resist adverse conditions such as combined compression and external pressure or combined bending, compression and torque.
- The torque shoulder dimension on VAM TOP HC is significantly larger than VAM TOP and with a mixture of reduced torque this enables the connection to withstand extreme compressive loads that are achievable for the pipe body (See the corresponding gas tight VME Performance Envelope)
