CleanReam Premium Casing-Reaming Bit


Efficiently drills out casing and liner using a robust cutting structure


  • Liner reaming
  • Casing reaming

Features and Benefits

  • The bladed concentric nose provides effective shearing and cutting, and enables optimal face volume for unrestricted cuttings removal. All materials inside the drill-out path, including the ceramic nozzle, can be drilled using polycrystalline diamond cutters (PDCs).
  • Shoulder-gauge PDCs form a robust cutting structure that efficiently reams through tight spots and hard ledges. The cutting structure also extends bit life and boosts rate of penetration, which reduces reaming time and minimizes casing fatigue.
  • Backreaming capability enables upward reaming through tight sections, which allows the casing to move freely while the next joint of casing is run.
  • Primary blades, which extend to the center of the bit, set in cement to prevent spinning while being drilled out. The bit design also reduces drill-out material and enables drilling of completely collapsed holes.

Tool Description

The Weatherford CleanReam™ premium casing-reaming bit efficiently reams restrictions during liner and casing installations. It is especially advantageous in wells with long, severely undersized holes.

The long, tapered, bladed concentric nose and long length of the gauges help to avoid sidetracking in soft formations. The nose features aluminum blades dressed with thermally stable polycrystalline (TSP) diamond cutters. The nose is also dressed with TSP diamond cutters, which enables drilling through bridges in the wellbore with unconfined compressive strength of up to 7,000 psi (48.3 MPa).

The CleanReam bit is fitted with interchangeable nozzles to enhance hole and blade cleaning and enable users to adjust the total flow area on-site. The standard nozzles are copper. Upgraded ceramic nozzles are available for long periods of reaming at high flow rates.

Once the reaming run is complete, the bit remains downhole. In preparation for drilling the next section, the nose and nozzles can be drilled out easily using PDC or rock bits.

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