Rotating flow control diverter having dual stripper elements
US9683422B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Mar 20, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/085
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotating flow control diverter apparatus having an upper and a lower stripper element mounted on upper and lower tubular shaft, respectively, each of which is axially rotatable by means of an upper and lower sealed bearing assembly, respectively, within a central bore of a housing. An upper and lower seal assembly seal the annular space between the central bore and the upper and lower tubular shaft, respectively to define a purge chamber. The purge chamber is in fluid communication with the central bore via the lower tubular shaft, and may be provided with valved ports. The housing may be constructed in removably mounted upper and lower portions, to which the upper and lower sealed bearing assemblies, respectively, and upper and lower seal assemblies, respectively, are mounted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.