3-1/2″ x 2-7/8″ Slip Insert for Varco Style Slips | Part 20161
The 3-1/2″ x 2-7/8″ Slip Insert (Pan P/N: 20161) is a high-tensile reduction insert engineered for the safe handling of 2-7/8″ OD drill pipe and tubing. Designed for use in 3-1/2″ Varco Style Slips (RSST and RSMD), these inserts are manufactured from forged alloy steel and heat-treated to API 7K standards, providing the aggressive mechanical grip and vertical support required for modern drilling and workover operations.
Description
Comprehensive Technical Data
Precision Reduction Engineering
When stepping down from a 3-1/2″ slip body to a 2-7/8″ pipe, dimensional accuracy is critical to prevent pipe deformation:
Anti-Bottlenecking Tooth Profile: The precision-machined tooth pattern ensures uniform pressure distribution, preventing “crushing” or stress risers on the drill pipe wall.
Superior Metallurgy: CNC-machined from forged 8620 alloy steel and case-hardened to 58-62 HRC for maximum wear resistance.
Impact Absorbing Core: A specialized tempering process ensures a ductile core that survives the high-impact “setting” of slips under heavy strings without fracturing.
Technical Specifications Table
| Property | Specification |
| Slip Size (Body) | 3-1/2″ |
| Pipe/Tubing OD Compatibility | 2-7/8″ |
| Dimensions (Approx.) | 2-3/4″ x 1-1/4″ x 3/4″ |
| Pan Part Number | 20161 |
| Full Set (RSST) | 24 Pieces (P/N: 20161-24) |
| Full Set (RSMD) | 30 Pieces (P/N: 20161-30) |
| Material Grade | Case-Hardened Forged Alloy Steel |
| Compliance | API Spec 7K |
Industry Cross-Reference Part Numbers
This insert is a precision-engineered, high-performance alternative for the following industry part numbers:
2161 | 10161 | 21-61 | ON-2161 | 71-2161 | 671129-1 | 80111 | 1451 | 6421610 | 36-2161 | 23-156
Equipment Compatibility
Varco Style Slips: Specifically designed for RSST (Short Slip) and RSMD (Medium Slip) configurations.
Rotary Slips: Compatible with SDS, SDML, and SDXL series requiring a 3/4″ thickness reduction insert.
Rig Types: Ideal for both land-based workover rigs and offshore drilling platforms.
Key Performance Advantages
Optimized Friction Coefficient: Specifically designed to maintain a secure grip through heavy drilling fluids and pipe scale.
Rapid Field Change-Out: Standardized dimensions allow for quick, easy replacement on the rig floor to minimize downtime.
HSE & Quality Control: 100% batch tested for hardness depth and dimensional tolerance to prevent “insert roll” in the slip body.
Surface Protection: Finished with a protective industrial coating to resist corrosion in high-salinity offshore environments.
Why Pan Oil Tools? (SEO Content)
Pan Industries is a globally trusted manufacturer of API 7K Rotary Slip Inserts. Our 3-1/2″ x 2-7/8″ series is the preferred choice for drilling contractors who prioritize pipe safety and tool longevity. We offer full material traceability (MTC) and maintain large stocks of 24-piece and 30-piece sets for immediate global dispatch.
Compatibility Disclaimer
Manufacturer names (Varco, NOV, Baash-Ross), equipment names, and reference part numbers are utilized strictly for identification purposes. Pan Industries is an independent manufacturer and is not affiliated with, licensed by, or endorsed by any original equipment manufacturers (OEMs). Our products are high-quality, compatible replacements intended for use in equipment manufactured by these OEMs.
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