Anti-friction device of drilling elements
US10145184B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2014 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Apr 18, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1064
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An anti-friction device is associated with a drilling element, the drilling element having a substantially cylindrical shape, with a first outside diameter (d1) and a longitudinal extension along a first axis (X). The drilling element includes at least one housing for receiving the anti-friction device. The anti-friction device has a hollow cylindrical shape having an inside diameter (d) which is smaller than the first diameter (d1) of the drilling element and an outside diameter (D) which is greater than the first diameter (d1) of the drilling element. The anti-friction device is adapted to rotate about the first axis (X) in the housing, independently of the drilling element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.