US 12,012,848 B2
Method and apparatus for quantitative multi-phase downhole surveillance
Thomas Sperle, Ranheim (NO); and Øystein Mølstre, Ranheim (NO)
Assigned to Resman AS, Ranheim (NO)
Appl. No. 17/613,733
Filed by RESMAN AS, Ranheim (NO)
PCT Filed May 23, 2020, PCT No. PCT/EP2020/064348
§ 371(c)(1), (2) Date Nov. 23, 2021,
PCT Pub. No. WO2020/239648, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 1907388 (GB), filed on May 24, 2019.
Prior Publication US 2022/0235649 A1, Jul. 28, 2022
Int. Cl. E21B 47/11 (2012.01); E21B 43/38 (2006.01); E21B 49/08 (2006.01)
CPC E21B 47/11 (2020.05) [E21B 43/38 (2013.01); E21B 49/08 (2013.01)] 30 Claims
OG exemplary drawing
 
22. A shunt chamber tracer apparatus for quantitative multi-phase downhole petroleum surveillance wherein the apparatus comprises:
a flow shunt chamber for a shunt flow comprising;
one or more outlets;
a flow phase separation section to separate the shunt flow into a low-density flow phase and a high-density flow phase;
at least one delay chamber;
a tracer releasing system for at least one tracer; and
at least two flow restrictors in fluid communication with the at least one delay chamber.