Petroleum well tracer release flow shunt chamber
US10689975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2015 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Feb 27, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B27/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A petroleum well tracer release flow shunt chamber in an annulus space about a base pipe and method of estimating one or more pressure differences or gradients, wherein the flow shunt chamber extending generally axial-parallel with the base pipe, and provided with a shunt flow passage for holding a shunt chamber fluid, and including: a tracer carrying system designed to release shots of tracer molecules or particles according to some control to the shunt chamber fluid, a first inlet aperture for receiving a first fluid, a second outlet aperture for releasing the shunt chamber fluid to a fluid, a flow restrictor nozzle unit allowing a pressure gradient between the inlet and outlet apertures driving the shunt chamber fluid out via the flow restrictor nozzle unit, topside recording the tracer transient response from the shunt chamber after tracer shots, extracting pressure gradients from recoded tracer transient response and tracer transient model, deriving wellbore inflow profile information from pressure gradients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.