0964134-A2 is referenced by 53 patents and cites 3 patents.

An apparatus and method is presented for establishing electrical connection to permanent downhole oilfield installations (26,27,28) using an electrically insulated conducting casing (22). Current is caused to flow in the casing by a source on the surface connected to the casing (22). One or more permanent downhole installations (26,27,28) are electrically connected to the casing (22), and the electrical connection to the casing (22) is used to power the downhole installations (26,27,28). The downhole installations (26,27,28) also inject a signal into the insulated casing (22) that passes via the casing to a surface readout which detects and records the downhole signals.

Title
Power and signal transmission using insulated conduit for permanent downhole installations
Application Number
EP19990201789 19990607
Publication Number
0964134 (A2)
Application Date
June 7, 1999
Publication Date
December 15, 1999
Inventor
Chouzenoux Christian
FR
Rossi David
FR
Babour Kamal
FR
Assignee
Schlumberger Holdings
VG
Schlumberger Services Petrol
FR
Schlumberger Technology
NL
IPC
G01V 03/00
E21B 47/12
G01V 11/00
E21B 47/12
E21B 17/02
G01V 11/00
E21B 47/12
E21B 17/02
View Original Source Download PDF