Differential pressure indicator for downhole isolation valve
US10787900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2014 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Mar 20, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A differential pressure indicator (DPI) for use with a downhole isolation valve includes a tubular mandrel for assembly as part of a casing string and for receiving a tubular string. The mandrel has a stop shoulder and a piston shoulder. The DPI further includes a tubular housing for assembly as part of the casing string and for receiving the tubular string. The housing is movable relative to the mandrel between an extended position and a retracted position and has a stop shoulder and a piston shoulder. The DPI further includes a hydraulic chamber formed between the piston shoulders and a coupling in communication with the hydraulic chamber and for connection to a sensing line. The housing is movable relative to the mandrel and to the extended position in response to tension exerted on the DPI.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.