Schlumberger

8 5/8 in MDSiZ616(219.075 mm)

Product ID: 66416A0001 ER 26639


Design Specifications

Total Cutters57
Cutter Size16mm (5/8 in)
Face Cutters(42) 16mm
Gauge Cutters(6) 16mm
Cone Cutters(9) 16mm
Blade Count6
Nozzles6 Standard Series 50N
Bit Connection4 1/2 Reg
Junk Slot Area, in212.85
GaugeLength: 3" Protection: Options Available
LengthMake-Up: 9.69 Overall: 13.878
Fishing NeckDiameter: 6 Length: 3.447

Operating Parameters

Bit SpeedSuitable for Rotary, Steerable Motor & Rotary Steerable BHA
Weight-on-Bit3,500 To 30,000 (lbs)
1,591 To 13,635 (daN)
2 To 14 (Tonnes)
Flow Rate galUs/min300 To 650
Hydraulic Horsepower, HSI1 To 6
Recommended Make-up Torque16600 To 21600 pound ft
The operating parameters listed here are general parameters, please contact your local Smith Bits representative for precise recommendations for your individual well.

style

style

The PX feature places thermally stable diamond inserts (TSP) on the gauge to maximize gauge retention and extend bit life.

Bit design is available with ONYX fixed cutters for improved thermal stability in harder, more abrasive formations, resulting in greater wear resistance.

Low Exposure (MDOC – Managed Depth Of Cut) Cutter backing raised to minimize excessive depth of cut because of formation heterogeneity to reduce cutter loading and minimize torque in transitional drilling. Minimizes cutter breakage and extends bit life.

Extended gauge pad length

The center location of the Stinger conical diamond in the bit enhances its stability to mitigate whirl and other artifacts that waste energy and reduce ROP. The Stinger element also provides an efficient mechanism to drill the very center of the borehole.