Overburden System



High performance overburden drill bits for casing applications...

Available in a wide range of sizes from 4” - 32” casing diameters.


The Eagle winged design simultaneous casing system benefits from the latest in CFD modelling for optimum performance and with its simple replaceable wings is easily manitained.


This casing advancement system is used by drillers worldwide for a number of varied projects including:


  • Micropiling
  • Underpinning
  • Marine Work
  • Horizontal drilling

What is the Eagle Concentric (ECS) System?


The Eagle Concentric casing system has been designed to overcome the problems of drilling in soft and loose ground conditions where a stable cased hole is required.


The Eagle Concentric System (ECS) achieves this by enabling the “down-the-hole” drill string and casing to be lowered simultaneously.


A down the hole (DTH) hammer is used to which a one-piece concentric bit is fitted with replaceable wings.

What are the advantages of the Eagle Concentric System?



  • Ease and cost effective replacement of wear parts (replacement wing kits available for these models)


  • Hole alignment is improved due to geometry of face design


  • Available in most shank designs
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We are also authorised distributors for the following brands:


- Halco Rock Tools

- Padley & Venerables


- Everdigm

- MTS Perforator




Unit 5 Spring Park,

Grimethorpe, South Yorkshire,

S72 7FD, UK


Tel: +44 (0) 1226 713493


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