Cutting element placement on a fixed cutter drill bit to reduce diamond table fracture
US9359825B2 · kind B2 · utility
7Cited by
15References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2009 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Nov 23, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/55
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary drag bit includes a primary cutter row comprising at least one primary cutter mounted on a blade, at least some cutters in the primary cutter row having a portion of a cutting surface thereof covered by a portion of the blade. A backup cutter row comprising at least one cutter may also be included, and at least a portion of a cutting surface of at least some cutters in the backup cutter row is covered by a portion of the blade. Enhanced support for cutters is provided against impact loading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.