Downhole tools
Hole Openers and Reamers
Enlarge pilot holes and keep the wellbore in gauge.
Overview
Hole openers enlarge an existing pilot hole to the diameter required for casing, using roller cone cutters or fixed cutters on arms around a central body. Roller reamers keep the hole in gauge and smooth doglegs and ledges.
Cutter type is chosen for the formation, just as with drill bits, and the tool is sized to the pilot and final hole diameters.
Key Features
- Roller cone and fixed-cutter options
- Replaceable cutters on many designs
- Pilot or bull nose configurations
- Fluid courses for cuttings removal
Applications
- Enlarging surface and intermediate sections
- Reaming tight or undergauge hole
- Smoothing doglegs before running casing
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