Ejector drill system
AssigneeAllied Machine & Engineering Corp.
InventorsDavid A. Lutz, James R. Porter, Chad M. Lynch
Life of this patent
Estimating the term…
Abstract
A drilling head for a tubular shank having an inside diameter and threads may comprise an axial body comprising a duct exiting through a first end; threads adjacent the first end corresponding to the threads on the shank and aligning the duct with the shank inside diameter; a bore from an outer surface of the body to the duct; and two axially extending approximately parallel and offset surfaces adjacent a second end; and an insert affixed between the offset surfaces, the insert comprising: a first face at least partially contacting one offset surface and a second face at least partially contacting the other offset surface; one or more cutting edges adjacent the first face, the second face, or both; and a cutting lip adjacent one or more cutting edges.
Claims20
A drilling head for a tubular shank, the drilling head comprising:
- an axial body comprising:
- a duct exiting through a first end;
- a fastening system adjacent the first end to fasten the drilling head on the shank and aligning the duct with the shank inside diameter;
- a bore from an outer surface of the body to the duct;
- and
- a replaceable insert affixed to the axial body by a temporary fastening system, the insert comprising:
- two cutting edges extending from a rotational axis of the insert in opposing manners for double effective cutting and having an outer edge which extends beyond the axial body when mounted therewith;
- and
- a cutting lip adjacent the two cutting edges, wherein in use, a drilling fluid is supplied to the area of the two cutting edges and exits though the duct which is positioned to receive drilling fluid from each of the two cutting edges.
A drilling head for a single or double tube shank having an inside diameter and threads, the drilling head comprising:
- an axial body comprising:
- a duct exiting through a first end;
- threads adjacent the first end corresponding to the threads on the shank and aligning the duct with the shank inside diameter;
- a bore from an outer surface of the body to the duct;
- and a replaceable insert affixed to the drilling head having two cutting edges extending from a rotational axis of the insert to provide double effective cutting in conjunction with one another, wherein a drilling fluid is supplied to the area of the two cutting edges and exits though the duct which is positioned to receive drilling fluid from each of the two cutting edges, and wherein the body has wear surfaces positioned on opposing sides of the body.
Dependencies are inferred from the claim text.