Reamaster-XTU Underreamer | SLB


Forged cutter arm underreamer

Schlumberger worker performing maintenance on an Reamaster-XTU forged cutter arm underreamer.

Withstand high shock and torque loads

With the ability to withstand high shock and torque loads and to run more drilling weight on the tool, Reamaster-XTU underreamer lets you spend more time on bottom for more cost-effective underreaming.

Robust cutter arms optimize underreaming performance

The Reamaster-XTU underreamer's large, robust cutter arms facilitate an increased cross-sectional area at the underreamer cutter pockets. The design also provides more room for larger sealed-bearing and polycrystalline diamond compact (PDC) cutters for optimized underreaming performance. A positive lock keeps the arms in the open position. The ability to enlarge an existing pilot hole by up to 70% makes this product ideal for a range of drilling and remedial operations.

Reamaster-XTU forged cutter arm underreamer.
TCI, milled tooth, and PDC cutters.

Fluid distribution control improves hole cleaning

Gun-drilled ports through the Reamaster-XTU underreamer deliver more fluid, giving the operator greater control over the distribution of fluid across the bit and the underreamer cutters. Hole cleaning efficiency is improved, and the fluid requirements of other downhole tools are accommodated.

Customize cutting structures for various formations

Customized cutting structures are available for a broad range of applications and formation types. Sealed-bearing milled tooth and tungsten carbide insert (TCI) cutters are designed specifically for underreaming operations and are capable of delivering penetration rates and cutting structure lives, comparable with the drill bit. PDC cutters are also available for long intervals.

Reamaster-XTU Forged Cutter Arm Underreamer

Available Reamaster Underreamer Tools

7 1/2 in 5750 Series
8 in
5750 Series
8 1/2 in 5750 Series
9 in 5750 Series
9 1/2 in 5750 Series
9 7/8 in 7200 Series, 8250 Series
10 5/8 in 8250 Series
11 in 7200 Series, 8250 Series
11 3/4 in 7200 Series
12 1/4 in  7200 Series, 8250 Series, 9500 Series
13 1/2 in 8250 Series, 9500 Series
14 in 8250 Series, 11750 Series
14 3/4 in 11750 Series
15 in 8250 Series, 9500 Series, 11750 Series 
16 in  9500 Series, 11750 Series
17 1/2 in 11750 Series
18 1/2 in  11750 Series
19 in  11750 Series
20 in 16000 Series
22 in 16000 Series
24 in 16000 Series
26 in 16000 Series