Methods to estimate downhole drilling vibration indices from surface measurement
US8798978B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2010 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | May 25, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B45/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method to estimate severity of downhole vibration for a wellbore drill tool assembly, comprising: identifying a dataset comprising selected drill tool assembly parameters; selecting a reference downhole vibration index for the drill tool assembly; identifying a surface parameter and calculating a reference surface vibration attribute for the selected reference downhole vibration index; determining a surface vibration attribute derived from at least one surface measurement or observation obtained in a drilling operation, the determined surface vibration attribute corresponding to the identified surface parameter; and estimating a downhole vibration index by evaluating the determined surface vibration attribute with respect to the identified reference surface vibration attribute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.