Rotating continuous flow sub
US9416599B2 · kind B2 · utility
3Cited by
30References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Jan 28, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.