Earth-boring tools having cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods
US8991525B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2012 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Jan 26, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5671
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An earth-boring tool having at least one cutting element with a multi-friction cutting face provides for the steering of formation cuttings as the cuttings slide across the cutting face. The multi-friction cutting element includes a diamond table bonded to a substrate of superabrasive material. The diamond table has a cutting face formed thereon with a cutting edge extending along a periphery of the cutting face. The cutting face has a first area having an average surface finish roughness less than an average surface finish roughness of a second area of the cutting face, the two areas separated by a boundary having a proximal end proximate a tool crown and a distal end remote from the tool crown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.