US 12,392,234 B2
Modular borehole imaging apparatus and methods
Cédric Perrin, Clamart (FR); Jose Luis Lopes, Clamart (FR); Sébastien Jacquart, Clamart (FR); Miguel Delgado, Clamart (FR); Florian Becker, Clamart (FR); Pedro Alexandre Das Neves, Clamart (FR); Ram Sunder Kalyanraman, Richmond, TX (US); Syed Talghani, Katy, TX (US); Alexis He, Clamart (FR); Chew Yeong Leong, Tananger (NO); and Josselin Kherroubi, Clamart (FR)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Jan. 13, 2023, as Appl. No. 18/154,069.
Application 18/154,069 is a continuation of application No. 17/247,268, filed on Dec. 7, 2020, granted, now 11,555,395.
Claims priority of application No. 19306641 (EP), filed on Dec. 12, 2019.
Prior Publication US 2023/0220762 A1, Jul. 13, 2023
Int. Cl. E21B 47/002 (2012.01); E21B 47/01 (2012.01); E21B 47/08 (2012.01); G01V 1/40 (2006.01)
CPC E21B 47/0025 (2020.05) [E21B 47/01 (2013.01); E21B 47/08 (2013.01); G01V 1/40 (2013.01)] 19 Claims
OG exemplary drawing
 
13. A method comprising:
running a tool string to a target depth in a borehole, wherein the tool string comprises a power and control (P/C) module, a first multi-finger caliper (MFC) module, and a second MFC module, wherein the first MFC module comprises a plurality of sensing fingers and wherein the sensing fingers are in a retracted position when running to the target depth;
extending the plurality of sensing fingers of the first MFC module from the retracted position to an extended position, wherein each of the sensing fingers are configured to gather caliper data and transmit the caliper data to a block of sensors on the first MFC module; and
logging with standard parameters until a defect is detected via operation of the first MFC module at a first resolution, and then logging a zone of interest containing the defect via operation of the second MFC module at a second resolution greater than the first resolution,
wherein the sensing fingers of the first MFC module are distributed around the circumference of the tool string, thereby enabling mapping of a measured section of the borehole by integrating different measuring points in the caliper data associated with each of the sensing fingers, and
wherein the first MFC module includes a first controller, the second MFC module includes a second controller, and the first and second controllers are electrically connected to a master board of the P/C module in parallel by a first signal connection and in series by a second signal connection.