MunchRdillo™ Scraper Milling Tool

MunchRdillo™ Scraper Milling Tool is a robust 360° contact free-rotating wellbore clean-up tool that combines the function of a scraping element and a heavy duty mill on one tool mandrel, which can be run modularly as part of the ArmRdillo™ Wellbore Clean-Up System. The MunchRdillo™ can be adapted to suit any casing size and drill pipe combination.


  • Strong, self-sprung, single piece Scraper Broach machined from a single billet of steel with multiple rows of overlapping teeth
  • Scraper Broach flexes to fit the casing ID, while being stiff enough to provide strong scraping force which ensures true 360° coverage where sprung pad scrapers cannot
  • Tungsten carbide cement mill is attached to the tool mandrel to mill cement and other debris
  • Two fluted Centralizer Rings provide centralization and protects the Scraper Broach
  • Free rotating tool design with Internal Bearing Rings to prevent mandrel, tool or casing wear
  • Can be quickly assembled redressed on location or support base with simple hand tools
  • No external bolts, clamps or fasteners that can come loose down hole
  • Robust assembly method with multiple back-ups


Cost savings

  • Combines the functionality of the RazRdillo™ Casing Scraper with the ruggedness of an aggressive fixed blade string mill
  • Milling of cement and scraping can be performed in a single trip saving rig time


  • The ArmRdillo™ Wellbore Clean-Up System can be provided with any type of rig end connections including premium and high torque connections reducing the need for reduced strength crossovers
  • Single piece mandrel with no internal connections for increased strength


  • Drilling hardened cement, and other accessories inside the wellbore in a single trip
  • Pre-completion wellbore clean-up operations to remove hardened cement sheath, scale, mud solids, cuttings and other detritus from the casing wall
  • Extended reach wells where high strength drill pipe connections are required
  • Remote locations where logistics are constrained and tool maintenance can be performed at the rig site
  • Short tripping where multiple tools need to be run on the same string


  • While running in hole, the teeth of the MunchRdillo™ Scraper Broach scrapes the casing wall removing cement sheath and other debris
  • Cement plugs and accessories can be drilled inside the casing as required following standard cement drilling practices and parameters
  • The MunchRdillo™ mill breaks up any large cement pieces or debris that is carried past the tool into smaller more manageable pieces
  • The MunchRdillo™ is reamed across the drilled out cement depths to remove any residual cement sheath in a single trip saving valuable rig time