Claims
- 1. A drill bit for cutting a formation, comprising:
a bit body; at least two rolling cone cutters rotatably mounted on said bit body; a plurality of primary steel tooth cutter elements mounted on each rolling cone cutter, said steel tooth cutter elements on at least two rolling cone cutters intermeshing; at least one steel tooth cutter element having a root portion having a root length, a crest portion having a crest length, and a central portion having an expanded length, wherein said expanded length is greater than said root length.
- 2. The drill bit according to claim 1 wherein said insert has a longitudinal axis and a crest having a centerline and said centerline is not parallel to a projection of the cone axis when viewed along said longitudinal axis.
- 3. The drill bit according to claim 1 wherein said insert has a longitudinal axis and said longitudinal axis is offset such that it does not intersect the axis of said cone.
- 4. The drill bit according to claim 1 wherein said insert has a longitudinal axis and a crest having a centerline and said centerline is not parallel to a projection of the cone axis when viewed along said longitudinal axis and said longitudinal axis is offset such that it does not intersect the axis of said cone.
- 5. A drill bit for cutting a formation, comprising:
a bit body; at least two rolling cone cutters rotatably mounted on said bit body; a plurality of primary steel tooth cutter elements mounted on each rolling cone cutter, said steel tooth cutter elements on at least two rolling cone cutters intermeshing; at least one steel tooth cutter element having a root portion having a root length and a crest portion having a crest length, wherein said crest length is greater than said root length.
- 6. The drill bit according to claim 5 wherein said insert has a longitudinal axis and a crest having a centerline and said centerline is not parallel to a projection of the cone axis when viewed along said longitudinal axis.
- 7. The drill bit according to claim 5 wherein said insert has a longitudinal axis and said longitudinal axis is offset such that it does not intersect the axis of said cone.
- 8. The drill bit according to claim 5 wherein said insert has a longitudinal axis and a crest having a centerline and said centerline is not parallel to a projection of the cone axis when viewed along said longitudinal axis and said longitudinal axis is offset such that it does not intersect the axis of said cone.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims the benefit of 35 U.S.C. 111(b) provisional application Serial No. 60/057,915 filed Sep. 4, 1997 and entitled “Cutter Element with Expanded Crest Geometry” and is a divisional of application Ser. No. 09/146,095, filed Sep. 3, 1998 and entitled “Cutter Element with Expanded Crest Geometry”, both of which are incorporated herein by reference.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60057915 |
Sep 1997 |
US |
Divisions (1)
|
Number |
Date |
Country |
Parent |
09146095 |
Sep 1998 |
US |
Child |
09858138 |
May 2001 |
US |