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US 8,281,876 B2Granted
Reamers and methods for directional drilling
AssigneeSoutheast Directional Drilling, LLC
InventorsJohn M. Heieie, Steven L. Ugrich
Life of this patent
Estimating the term…
Abstract
A reamer includes a mandrel defining a mandrel axis and arms extending radially from the mandrel. Each arm has a proximal end and a distal end. The reamer includes a cutting head disposed on the distal end of each arm and cutting teeth disposed on each cutting head. The cutting heads are arcuately spaced about the central mandrel to allow the movement of debris axially along the central mandrel and at least one of the arms defines a square cross-sectional shape.
Claims18
A reamer for underground boring, the reamer comprising:
- a mandrel defining a mandrel axis;
- arms extending radially from the mandrel, each arm having a proximal end and a distal end;
- a cutting head disposed on the distal end of each arm;
- and
- cutting teeth disposed on each cutting head;
- wherein the cutting heads are arcuately spaced about the central mandrel to allow the movement of debris axially along the central mandrel;
- and
- wherein at least one of the arms defines a substantially square cross-sectional shape.
5 more elements
Dependencies are inferred from the claim text.