7 1/2 - 8 1/2 in QDG5313(190.5 - 215.9 mm)

ER 2200 IADC S243

Design Specifications

Total Cutters30
Cutter Size13mm (1/2 in), 16mm (5/8 in)
Face Cutters(25) 13mm, (5) 16mm
Gauge Cutters(25) 13mm, (5) 16mm
Drill Out Cutters(25) 13mm, (5) 16mm
Conditioning Cutters(25) 13mm, (5) 16mm
Blade Count8
Pilot Diameter6"
Maximum Tool Diameter6 1/4 in
Nozzles3 Standard Series 60N
Junk Slot Area (sq in)21.1
Gauge Length1 1/2 in
Gauge ProtectionOptions Available
Upper Connection4-1/2" API Reg.
Lower Connection3-1/2" API Reg. Box
LengthMake-Up: 22 13/16 in Overall: 27"
Fishing NeckDiameter: 6" Length: 2 1/4 in

Operating Parameters

Rotary SpeedSuitable for Rotary & PDM
Weight-on-Bit4,000 To 30,000 (lbs)
1,818 To 13,635 (daN)
2 To 14 (Tonnes)
Flow Rate (GPM)300 To 800
Hydraulic Horsepower (HSI)1 To 6
The operating parameters listed here are general parameters, please contact your local Schlumberger representative for precise recommendations for your individual well.


Pilot conditioning section improves tool stability & by stress relieving the formation with this intermediate stage, drilling the larger hole can be done at a more aggressive ROP

Drill collar connections allow flexible drillstring placement to optimize reamer and BHA performance.

Both the pilot hole section and the reamer cutting structure contain PDC inserts & carbide hardfacing on gauge to maintain hole integrity and extend tool life.

Short gauge length improves directional responsiveness without compromising hole integrity or tool stability.