| 摘要 |
<p>An apparatus for tracer based flow measurement comprises: a tracer chamber 20, 33, 133, 43, 143, 53, 153 for installation in and/or on a production tubing 10, wherein the tracer chamber 20, 33, 133, 43, 143, 53, 153 is for holding tracer and is arranged to be linked, in use, to the pressure in an annulus 3 about the production tubing 10; the tracer chamber 20, 33, 133, 43, 143, 53, 153 comprising an outlet 31, 131, 41, 141, 51, 151 for fluid communication between the tracer chamber 20, 33, 133, 43, 143, 53, 153 and the fluid within the production tubing 10; whereby tracer is released from the tracer chamber 20, 33, 33, 43, 143, 53, 153 into the production tubing 10 in accordance with a pressure differential between the annulus 3 and the production tubing 10.</p> |
