Earth-boring tool having back up cutting elements with flat surfaces formed therein and related methods
US10107040B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2015 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | May 15, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth-boring tool includes primary and secondary cutting elements mounted to a tool body. The secondary cutting elements define a secondary cutting profile. The secondary cutting profile is recessed relative to the primary cutting profile, which is defined by the primary cutting elements. In an unworn condition, the primary cutting elements engage and cut a formation material while the secondary cutting elements do not. Each secondary cutting element includes a flat surface oriented at an angle relative to a longitudinal axis thereof and extending between a front cutting face and a peripheral side surface thereof. The secondary cutting elements are oriented on the tool body such that a surface area of the flat surface thereof will engage the formation material at least substantially simultaneously when the primary cutting elements reach a worn condition. Methods of forming the earth-boring tool and methods of using the earth-boring tool are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.