Method and apparatus for measuring a parameter within the well with a plug

摘要

The invention provides a system for measuring a parameter within a well, made of: a first apparatus comprising a first reel (41) of first wound optic fiber line (or fiber) able to be unwound from the first reel, at least a first sensor (51) able to measure the parameter of the well, wherein an information on said parameter can be transmitted trough the first optic fiber (11); a second apparatus comprising a second reel (40) of second wound optic fiber line (10) able to be unwound from the second reel (40), an extremity of the second optic fiber being fixed to a reference point; a light transmitter or receiver device (12) linked to the reference point and able to generate or detect a light pulse through the second optic fiber line (10); and means to exchange said light pulse between first (11) and second optic fiber line (10).