INJECTOR FOR INJECTING A TRACER INTO AN OIL OR GAS RESERVOIR

摘要

Injector (1) for injecting a traceable material into an oil and/or gas reservoir, the injector being lowered down in a bore hole that is in communication with the reservoir, followed by activating an electro-hydraulic system to inject a traceable material stored in a container into the reservoir. The injector is provided with a gland plate (7) that seals the space between the injector and the wall of the bore hole (16) in a manner that pevents traceable material to be distributed in the bore hole, but secures direct injection of the material into the reservoir. The injector is adapted to be positioned at a specific depth level in the bore hole, and to be cleaned by pressurised liquid after the injection operation is fulfilled.