DiamondBack Reamer Shoe


Guides casing and liners to total depth in hard, abrasive formations with horizontal or deviated wellbores


  • Hard and abrasive formations
  • Horizontal and highly deviated wells
  • Re-entry wells
  • Large-diameter casing- or liner-running with little or no rotation

Features and Benefits

  • The chunky tungsten-carbide cutting structure provides full-bore coverage in both rotating and reciprocating applications, which enables easy passage to total depth (TD).
  • The diamond-shaped cutting structures provide a 360º cutting radius that overcomes openhole bridges and well sloughing.
  • The shoe enables both rotating and reciprocating reaming action while running casing and liners.
  • Large flow-directed ports provide full-bore coverage while rotating and reaming, and prevent channeling while pumping cement.
  • The standard aluminum-alloy nose withstands impact loading and high set-down weight, yet still enables fast drill-out with a polycrystalline diamond (PDC) or tri-cone bit.
  • Most models incorporate chip breaker holes in the nose assembly that avoid the bird-nesting effect during drill-out.
  • The tool is compatible with all casing- and liner-running systems.
  • The tool can be customized with specialty noses, valves, or threads to meet specific operational requirements.

Tool Description

The DiamondBack reamer shoe overcomes wellbore restrictions and the cutting structure reams out tight spots, which enables the tubular string to reach TD. The cutting structure provides full-bore coverage in both rotating and reciprocating applications while rigid standoff stabilizer blades clear a path for the casing or liner string and most types of rigid centralizers installed above the reamer.

The nose assembly is available in eccentric aluminum (standard) or eccentric composite. Float valve options―all rated to API RP 10F IIIC standards―include single valve, dual valves, cemented single valve, cemented dual valves, no valve. A baffle plate can be added to facilitate plug landing.

Reamer Shoes Comparison

DiamondBack Reamer Shoe

DiamondBack FR Reamer Shoe


DiamondBack Reamer Shoe


DiamondBack FR Reamer Shoe

Field-proven, premium reamer technology

  • Withstands extreme and challenging environments, including abrasive formations and high-angle wellbores
  • Endures high-impact loading and high set-down weight

Premium reamer shoe plus a self-orienting nose

  • Eliminates the need to rotate casing
  • Directs casing strings to the path of least resistance through use of a unique free-rotating eccentric guide (FREG) nose

DiamondBack CC Reamer Shoe

CleanReam Reamer Shoe

  DiamondBack CC Reamer Shoe CleanReam Premium Casing-Reaming Bit

An economic and compact reamer shoe

  • Withstands unstable formations
  • Features an integral cutting structure

Premium reamer shoe plus a casing bit

  • Features interchangeable ceramic or copper nozzles
  • Avoids sidetracking potential

Features and benefits shared by all Weatherford reamer shoes

  • Places casing- and liner-reaming operations at TD when conventional guide or float shoes are likely to fail
  • Provides 360-degree coverage in both rotating and reciprocating applications
  • Overcomes wellbore obstructions, including openhole bridges, sloughing, ledges, and ridges
  • Prevents channeling during cement pumping through use of large, flow-directed ports that provide fullbore coverage


  DiamondBack DiamondBack FR Diamondback CC CleanReam
Formation Type Hard and abrasive formations Hard and abrasive formations
Medium hard, soft, and
unstable formations
Hard, abrasive, and
aggressive formations
Wellbore Geometry
Vertical, horizontal,
sidetrack, re-entry wells
Vertical, horizontal,
sidetrack and re-entry wells
Highly deviated, inclined, dogleg,
vertical, and horizontal wells
Vertical, horizontal,
and high-angle
Cutter Type Chunky tungsten carbide Chunky tungsten carbide Tungsten carbide
Thermally stable polycrystalline diamond (TSP) on nose, polycrystalline diamond
(PDC) cutter
Cutting Structure
Hardness Rating
~89 HRc ~89 HRc ~64 HRc ~115 HRc
Standard Casing Size Availability 3.5 to 20 in. 4.5 to 13 5/8 in. 3.5 to 20 in. 4.5 to 20 in.
Number of Cutting Pads 6 to 18 6 to 18 6 3 to 6
Number of Stabilizer Blades 3 to 6 3 to 6 3 5 to 6
Average Stabilizer Blade Length 7 in. (177.8 mm) 7 in. (177.8 mm) 3.5 in. (88.9 mm) 7 in. (177.8 mm)
Rotation and Reciprocation Rotation only
Nose Type Eccentric composite, aluminum FREG composite Eccentric composite, aluminum Aluminum with TSP cutters
Nose Port Flow Area
3.29 to 13.15 in.2
(2,123 to 8,484 mm2)
3.14 to 4.92 in.2
(2,026 to 3,174 mm2)
3.29 to 13.15 in.2
(2,123 to 8,484 mm2)
2.07 to 9.02 in.2
(1,335 to 5,819 mm2)
Max Set Down Weight
75,000 to 400,000 lb
(34,019 to 181,437 kg)
220,500 to 660,500 lb
(100,017 to 299,598 kg)
75,000 to 400,000 lb
(34,019 to 181,437 kg)
75,000 to 400,000 lb
(34,019 to 181,437 kg)
Temperature Rating 400°F (204°C)
Composite nose: 257°F (125°C)
Aluminum nose: 400°F ( 204°C)
Composite nose: 257°F (125°C)
Aluminum nose: 400°F ( 204°C)
250°F (121°C)
Back Pressure Rating
1,800 to 10,000 psi
(12.41 to 68.95 mPa)
5,000 psi
(34.47 mPa)
≤ 10,000 psi
(≤ 68.95 mPa)
3,600 to 5,000 psi
(34.82 to 34.47 mPa)
PDC Drillable