CA2257934A1 - Cutter element adapted to withstand tensile stress - Google Patents
Cutter element adapted to withstand tensile stressInfo
- Publication number
- CA2257934A1 CA2257934A1 CA002257934A CA2257934A CA2257934A1 CA 2257934 A1 CA2257934 A1 CA 2257934A1 CA 002257934 A CA002257934 A CA 002257934A CA 2257934 A CA2257934 A CA 2257934A CA 2257934 A1 CA2257934 A1 CA 2257934A1
- Authority
- CA
- Canada
- Prior art keywords
- cutter element
- present
- trailing
- tensile stress
- cutters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000015572 biosynthetic process Effects 0.000 abstract 1
Landscapes
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A cutter element (62) having a substantially flat wear face and leading (64) and trailing (66) sections, wherein the leading section (64) is sharper than the trailing section (66). Sharpness is defined as either a smaller inside angle at the intersection of a pair of planes or as a smaller radius of curvature. The insert of the present invention experiences reduced stress on its trailing portion and therefore is less subject to extreme wear and failure.
The present invention can be applied with particular advantage to heel row cutters, but can also be~
applied to cutters in other rows that primarily ream the borehole wall.
The present cutter element can be constructed so as to have either a~
positive or negative rake angle at its~
leading section, or to have any of a variety of shapes, depending on the characteristics of the formation~
in which it is to be used.
The present invention can be applied with particular advantage to heel row cutters, but can also be~
applied to cutters in other rows that primarily ream the borehole wall.
The present cutter element can be constructed so as to have either a~
positive or negative rake angle at its~
leading section, or to have any of a variety of shapes, depending on the characteristics of the formation~
in which it is to be used.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/668,109 US5813485A (en) | 1996-06-21 | 1996-06-21 | Cutter element adapted to withstand tensile stress |
| US08/668,109 | 1996-06-21 | ||
| PCT/US1997/010714 WO1997048877A1 (en) | 1996-06-21 | 1997-06-19 | Cutter element adapted to withstand tensile stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2257934A1 true CA2257934A1 (en) | 1997-12-24 |
| CA2257934C CA2257934C (en) | 2005-12-20 |
Family
ID=35645851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002257934A Expired - Fee Related CA2257934C (en) | 1996-06-21 | 1997-06-19 | Cutter element adapted to withstand tensile stress |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2257934C (en) |
-
1997
- 1997-06-19 CA CA002257934A patent/CA2257934C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2257934C (en) | 2005-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160620 |