Surface signal for flow blockage for a subterranean debris collection apparatus
US8727009B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Nov 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/451
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The debris collection device operates on an eductor principle with motive fluid delivered from the surface into an eductor housing inlet. The eductor outlet goes into a surrounding annular space and splits with some flow going to the mill below to direct cuttings into the passage in the housing. The cuttings remain in the housing and the flow continues through a screen in the housing passage before reaching the eductor inlet. An auxiliary inlet is normally closed and opened with a reduced flow entering through the mill. The opening of the auxiliary inlet drops the surface pressure delivered to the eductor to act as a surface signal that a plugged or low debris laden inlet flow exists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.