Reaming Bit

A reaming bit enlarges an existing borehole from a smaller pilot diameter to the final required hole size. In drilling operations, this two-stage approach is often more economical and controllable than drilling the full size in one pass. Reaming bits come in fixed-blade (PDC) and roller reamer configurations, with the choice depending on formation hardness, hole size differential, and whether the reaming is done while drilling or in a separate trip.

Core Advantages:

- Enlarges pilot holes to final diameter (commonly 12-1/4" to 26")

- PDC reaming while drilling (RWD) tools for single-trip efficiency

- Roller reamers with expandable cutters for selective activation

- Stabilization pads maintain hole gauge and reduce vibration

- Compatible with standard API drill string connections

- Hardfaced gauge protection for extended reaming intervals

Q: What is reaming while drilling (RWD) and how does it save money?

A: RWD tools combine a pilot bit with an expandable reamer, allowing you to drill the pilot hole and enlarge it simultaneously. This eliminates a separate reaming trip, saving rig time that can cost $10,000-50,000+ per day on offshore operations.

Have a hole opening or reaming requirement? Share your pilot and final hole sizes and we'll engineer the right reaming solution for your formation conditions.