Patent ID: 7373975
Filing Date: 2008-05-20
Classification: E21B

Abstract:
1. A downhole recorder system for use with a downhole assembly ( 21 , 31 ) to be lowered into a borehole ( 22 , 32 ), the downhole recorder system comprising a plurality of recorders ( 25 a , 25 b , 35 a , 35 b , 35 c , 35 d , 35 e ) each uniquely associated with a determined sub-assembly ( 24 a , 24 b , 34 a , 34 b , 34 c , 34 d , 34 e ) of the downhole assembly, at least one recorder allowing to store operating data related to the determined sub-assembly and having at least one common sensor ( 23 , 33 ) communicating with at least one of the other recorders, the stored operating data being extractable at least when the determined sub-assembly is disassembled from the downhole assembly.