Varco Style 2628 Button Die for DCS & CMS-XL Slips | Pan P/N 20228
The Varco Style 2628 Button Die (Pan P/N: 20228) is a high-tensile circular gripping insert engineered for the secure handling of small-to-medium OD drill collars and casing. With a robust 1-inch thickness profile, these buttons are essential for adapting CMS-XL (6-5/8″), DCS-S, and DCS-R slips for reliable mechanical grip. Manufactured from forged 8620 alloy steel and heat-treated to API 7K standards, they provide the aggressive mechanical bite required for high-torque drilling environments.
Description
Technical & Engineering Data
Structural Stability & Load Integrity
Thicker buttons like the 2628 are subject to massive radial compression. Our engineering ensures they maintain structural stability:
Precision Carburization: Every button undergoes a deep case-hardening process to achieve a surface hardness of 58-62 HRC. This ensures the teeth maintain a sharp biting edge even through abrasive drilling mud and rust.
Impact Resistance: While the surface is rock-hard, the inner core remains ductile. This prevents the button from shattering or “popping” out of the slip segment when the slips are set under the weight of a heavy drill collar string.
Pyramid Tooth Geometry: Optimized to distribute clamping forces evenly, providing a secure hold while preserving the structural integrity of the tubular wall.
Technical Specifications Table
| Property | Specification |
| Pan Part Number | 20228 |
| Reference OEM P/N | 2628 |
| Approx. Dimensions | 1-1/4″ x 1-3/8″ x 1″ |
| Material Grade | Forged 8620 Alloy Steel (Carburized) |
| Standard Compliance | API Spec 7K |
| Grip Profile | Multi-Point Pyramid Tooth |
Full-Set Quantity Calculator
| Equipment Type | Casing/Collar Size | Total Buttons Required | Pan Set Part Number |
| CMS-XL Casing Slip | 6-5/8″ | 144 Pieces | 20228-144 |
| DCS-R Drill Collar Slip | 4-1/2″ to 6″ | 63 Pieces | 20228-63 |
| DCS-S Drill Collar Slip | 3″ to 4″ | 49 Pieces | 20228-49 |
Industry Cross-Reference Part Numbers
This button is a high-performance, drop-in replacement for the following industry and OEM part numbers:
2628 | 10228 | 6426280 | 80155 | 71-2628 | 36-2628 | ON-2628
Why Pan Button Dies Defeat the Competition?
Pan Industries specializes in the metallurgy of high-stress consumables. Our 2628 series is designed to withstand the extreme radial squeeze of deep-hole drilling. Unlike generic imports, every batch is 100% inspected for dimensional accuracy and hardness depth. We provide full material traceability (MTC) for all orders, meeting the stringent quality requirements of the global energy sector.
Compatibility Disclaimer
Manufacturer names (Varco, NOV, Baash-Ross), equipment brands, and reference part numbers are utilized strictly for identification purposes. Pan Industries is an independent manufacturer and is not affiliated with, endorsed by, or licensed by any original equipment manufacturers (OEMs). Our products are premium compatible replacements designed to perform in OEM equipment.
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