Directly installed shut-off and diverter valve assembly for flowing oil well with concentric casings
US5161617A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Jul 29, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6123
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for installing a selectively reopenable shut-off valve into an oil well casing of the type having an outer production casing and an inner production pipe suspended therein including a laterally installed casing plug to which independent flow diversion apparatus are attached after the casing is plugged and flow is initially stopped to allow temporary diversion and continued separated and independent flow from the annulus between the outer casing and inner pipe and from the pipe itself. The apparatus is particularly adapted to shut off a well which is burning or flowing out of control so that suitable repairs may be effected at the wellhead, while production is continued via the separately diverted flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.