| 摘要 |
A petroleum well tracer release flow shunt chamber (1) in an annulus space (20) about a base pipe (10) and method of estimating one or more pressure differences or gradients, wherein the flow shunt chamber (1) extending generally axial-parallel with the base pipe (10), and provided with a shunt flow passage (4) for holding a shunt chamber fluid (F3), and comprising : - a tracer system (2) exposed to and arranged for releasing unique tracer molecules (3) at a generally even release time rate to the shunt chamber fluid (F3), - a first inlet aperture (6) for receiving a first fluid (F6), - a second outlet aperture (5) for releasing the shunt chamber fluid (F3) to a fluid (F5), - a flow restrictor (7) allowing a pressure gradient between the inlet and outlet apertures (6, 5) driving the shunt chamber fluid (F3) out via the flow restrictor (7). |
