Earth boring tools having fixed blades, rotatable cutting structures, and stabilizing structures and related methods
US10704336B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/567
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth-boring tool includes a body having a shank and a crown, a plurality of blades protruding from the crown of the body and extending at least substantially along a longitudinal length of the crown of the body, each blade extending radially outward and defining a respective radially outermost gage surface. The earth-boring tool further includes at least one rotatable cutting structure assembly including a leg and a rotatable cutting structure rotatably coupled to the leg. The earth-boring tool also includes at least one stabilizing structure secured to the crown of the body between an end of the leg opposite the rotatable cutting structure and the shank of the body, the at least one stabilizing structure being at least substantially circumferentially aligned with the leg of the at least one rotatable cutting structure assembly along a circumference of the crown of the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.