Arcuate-shaped inserts for drill bits
US6823951B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed are a variety of arcuate-shaped inserts for drill bits, and in particular, for placement in rolling cone cutters of drill bits. The arcuate inserts include 360 degree or ring-shaped inserts, as well as inserts of smaller arcuate length. The arcuate inserts may include stress relieving discontinuities such that, upon assembly into the cone, the arcuate inserts fragment in a controlled and predicted manner into shorter arcuate lengths. The arcuate inserts are suitable for use in all surfaces of the rolling cone cutter, and in other locations in drill bits, and may have specialized cutting surfaces and material enhancements to enhance their cutting duty performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.