Downhole determination of drilling state
US9631477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2013 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Jul 28, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for determining a drilling state of a bottom hole assembly in a wellbore includes acquiring one or more downhole sensor measurements and processing the sensor measurements using a downhole processor to determine a drilling state of the bottom hole assembly. An operating state of the bottom hole assembly may be automatically changed in response to the determined drilling state. A method for computing a dynamic drilling energy of a bottom hole assembly includes acquiring at least one sensor measurement and processing the sensor measurements to obtain at least one of (i) an energy of axial motion of the bottom hole assembly, (ii) an energy of rotational motion of the bottom hole assembly, and (iii) an energy of lateral motion of the bottom hole assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.