Rhino XS2 Full-Cycle Expandable Reamer | Schlumberger

Rhino XS2

Full-Cycle Expandable Reamer

Full cycle ball drop actuation
Activation and deactivation by dual drop ball system. 
Operational Flexibility
Optimized for rathole elimination and specific interval reaming
Multiple cutting structure configuration
Application specific cutter block configuration

Effective hole cleaning at TD with full circulation rates

Beginning full-cycle actuation involves pumping an activation ball downhole, which shears the sleeve and exposes the fluid ports. The reamer’s unique design positions moving parts farther from critical flow ports.

Drilling fluid flows through the fluid ports, opening the cutter blocks. The hole is then drilled and enlarged. The tool has three ports, facilitating cuttings removal.

Once drilling and underreaming is performed, the cycle is completed by pumping another ball down. The deactivation pins shear, releasing the sleeve and ball to the catcher, and closing fluid ports to the cutter blocks.

Circulating fluid can then be pumped at maximum flow rates for optimal hole cleaning at TD without activating the cutter blocks. Multiple bottom-up cycles can be pumped as required. When the tool is inside the casing, additional cycles can be pumped without the risk of damaging the casing. The deactivated tool trips out without generating new cuttings.

Schlumberger worker performing maintenance on a Rhino XS2 full-cycle expandable reamer.
Cutter Blocks: 3D Innovations for the Best Performance
From the AxeBlock torque-reducing ridged diamond element cutter block to stabilizer blocks, our industry-leading family of cutter blocks combine the best cutters with a dynamically stable design for the best performance in a variety of formations —all in a variety of BHA configurations.
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Diagram of an Rhino XS2 full-cycle expandable reamer with cutter blocks, deactivation ball, and activation ball
A
Cutter blocks
B
Deactivation ball
C
Activation ball
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