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Best practices for HDD Reaming in rock structures
Published — 2022-03-25
We have put together the best practices for HDD (horizontal directional drilling) reaming in rock structures.
- Follow the manufacturer guidelines relating to push/pull forces, revolutions per minute (RPM) and fluid volume
- Ease the reamer into cutting and allow it to cut its own pattern for 3 to 5 feet before increasing pull forces, particularly when there is a transition from soft rock to hard rock.
- Allow a new reamer to cut its own pattern when replacing a used reamer
- Use the rule of thumb that the harder the rock, pull forces need to be higher and RPM needs to be lower
- When reaming in rock, use higher fluid volume to better cool the reamer and remove cuttings
- Centralize each reaming pass with in general between 1.5” and 2.0” smaller diameter than the previous pass.
- Track reamer life by calculating cone revolutions as opposed to drilling hours.
Contact us if you have any further questions to our HDD specialists.