CUTTING 7″ CHROME TUBULARS USING THE NEW WELL CUTTER 414

Well Cutter for MECHANICAL SOLUTIONS

Background

An operator in the North Sea needed to sever a 7″ 29# Cr13S-110 tubing in order to prepare for workover. The primary objective was to cut the tubing at ~12,600 ft (3,840 m) MD with a contingency to do a shallower cut in case the deep cut did not free the tubing.

OPERATION

A series of logging passes fine-tuned the operation, adjusting the cutting depth from 12,600 – 12,588 ft (3,840 to 3,837 m) to ensure an optimal cutting location. The Well Cutter® was positioned and anchored at depth and the cutting procedure commenced. Real-time feedback from the toolstring ensured full control and provided the ongoing status of the downhole operation. The cut was performed in just one hour and 20 minutes. Once the cut was made, the tools were removed from the well and the tubing was pulled. Only 10 tons overpull was required to demonstrate that the cut was successfully achieved.

The Well Cutter’s design resulted in a tapered, machineshop cut for easy re-entry into the tubing top left in the well. Using this e-line tool the only debris left in the well is a metal dust that will not cause issues with future operations.

ACHIEVEMENTS

The entire operation took only 13 hours, with ~10 of these in the well and an hour and 20 minutes cutting. The first, deeper cut was successful and thus the contingency did not come into play. This operation is testament to the value provided by the Well Cutter 414, with no NPT, no misruns and a significantly safer operation with lower impact than alternatives. The operator was so pleased with the outcome that they decided to keep the Well Cutter available offshore for another, upcoming operation on an adjacent rig.

WELL TYPE: OIL PRODUCER, CASED HOLE,
SEMI SUBMERSIBLE (MODU)
CUTTING DEPTH: 12,543 FT
MAX. DEVIATION: 60°
MAX. PRESSURE: BHP 5.961 PSI @ 12,600 FT
MAX. TEMPERATURE: BHT 212°F @ 12,600 FT

 

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This operation is testament to the value provided by the Well Cutter 414, with no NPT, no misruns and a significantly safer operation with lower impact than alternatives.