Method and apparatus for damping/absorbing rotational vibrations/oscillations
US11142962B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2020 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Dec 19, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2222/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vibration damping device for use with a downhole tool having a tool axis may comprise a device housing mechanically coupled to the downhole tool, wherein the device housing defines a receptacle having a volume and an inner surface; an inertia element movably supported in the receptacle and having a volume, a mass, and a non-zero moment of inertia about the tool axis; wherein the inertia element volume is greater than the receptacle volume and an interstitial volume is defined between the inertia element and the receptacle, and wherein the interstitial volume is occupied by a fluid or an elastomer. The device may include a longitudinal bearing and/or a radial bearing between the inertia element and the receptacle. The device may also include a pressure compensation device in fluid communication with the receptacle and positioned within or an integral part of the device housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.