⚙️ HDD Fly-Cutter / Barrel Backreamers (Hole Size = 1.5x Outer Diameter), GPM Flow

HDD Backreamer Diameter & Flow Calculator

Size multi-step backreaming passes (fly-cutter, fluted, and barrel hole openers) for enlarging pilot holes prior to pipe pullback: calculate final borehole diameter rule-of-thumb (1.5x outer diameter for pipes ≤24" and +12" for pipes >24"), calculate required high-pressure slurry pumping flow (GPM based on penetration rate in/min), and HDD tool profits.

1. Project & Operating Inputs

Total Backreaming Length (Linear Feet e.g. 1,600 Linear Feet)

Final Product Pipe Diameter (Inches e.g. 20.0" Steel Pipe)

Customer Bid Price for Multi-Stage Reaming Operation ($ / Lin Ft)

Fluted Hole Opener Reamers, High-Pressure Mud Pumps, Fuel & Drillers ($)

2. Financial Breakdown & Yield

HDD BACKREAMER & HOLE OPENER

Turnkey Reaming Operation Profit

Trenchless Tooling Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost