Schlumberger

ReSOLVE Milling Tool

Coordinated milling tool and tractor operation

ReSOLVE instrumented wireline intervention service’s milling tool mills through debris and scale buildups, tubing restrictions, and plugs. The TuffTRAC tractor is seamlessly integrated to automatically drive the milling tool forward and resist rotation while the tool’s rotating bit engages the obstruction. Unlike for conventional uninstrumented milling tools, engineer is fully informed of the tool’s performance status through real-time monitoring while dynamically controlling the bit speed and weight on bit (WOB).

MillOptimizer automatic milling system

The MillOptimizer automatic milling system can also be used to automatically adjust the WOB to achieve a particular torque. Bit torque is constantly monitored and WOB adjusted by the TuffTRAC tractor to maintain a constant bit speed. With the automatic, coordinated control of the MillOptimizer system, the tractor and milling tool operate as a single intelligent system to maximize milling efficiency and prevent stalling. Any bit stalling is immediately detected by the MillOptimizer system, which automatically stops the tool, disengages the scale by reversing the bit and the tractor, and then resumes milling.

Optimized scale-milling bit

The milling tool uses a novel PDC bit designed and manufactured by Lyng Drilling, a Schlumberger company. Optimized for maximum rate of penetration (ROP) when milling hard scale buildup, this groundbreaking mill bit achieves the highest rate of scale volume milled within the power limits of electric wireline.

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4,650 ft of Barium Sulfate Scale Milled in 81 Operating Hours

The MillOptimizer automatic milling system for the ReSOLVE service’s milling tool delivers the world’s first truly robotic intervention system.
The MillOptimizer system automatically integrated operation of ReSOLVE service’s milling tool and the tractor to maintain consistent milling speed in the variable scale accumulations and recover from any bit stalling. Read case study

Seamless Integration of Milling Tool and Tractor

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