Drill string sub
US9850708B2 · kind B2 · utility
1Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2014 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Feb 20, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/09
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure is directed to a drilling system including a drill string with two or more drill pipes (e.g., tubular), a drive system configured to rotate the drill string, and a neutral point sub disposed proximate a neutral point of the drill string, where the neutral point sub is configured to detect motion of the drill string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.