Patent · US Active

Petroleum well tracer release flow shunt chamber

US9896913B2 · kind B2 · utility

3Cited by

4References

28Claims

0Family size

Assignee

Resman AS · NO

Inventors

Fridtjof Nyhavn · Trondheim, NO
Christian ANDRESEN · Vikhammer, NO
Gaute Oftedal · Trondheim, NO

Key dates

Filing date	Aug 30, 2013
Grant date	Feb 20, 2018
Priority date	—
Expiry date	Mar 22, 2034

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B49/086
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 system exposed to and arranged for releasing unique tracer molecules at a generally even release time rate 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 allowing a pressure gradient between the inlet and outlet apertures driving the shunt chamber fluid out via the flow restrictor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.