BOPI 05 BR / 2025 REPERTOIRE NUMERIQUE 30 - A grid current control circuit that receives the digital control signals from the Digital Sequencer circuit and comprises at least one set formed by an inverter (INV) and optionally a converter (DCDC CONV) and - A voltage and current adapter transformer (TR), whose rectified output supplies the grid intensity (IG) necessary to obtain the requested anode intensity (IA). It avoids having to calibrate and/or characterize the curve of the anode current (IA) versus the grid current (IG), keeping the X-ray tube in perfect condition throughout its useful life. Fig. 6 (11) 21911 Consulter le mémoire (51) E21B 17/10 (2023.01); E21B 43/10 (2023.01); E21B 47/13 (2023.01); E21B 47/14 (2023.01) (21) 1202400294 - PCT/US2023/013607 (22) 22/02/2023 (30) US n° 17/652,499 du 25/02/2022 (54) Downhole Centralizer. (72) LEDUCQ, Paul (FR); ISAMBERT, Sebastien (FR); CHEVILLARD, François (FR); CECCONI, Fabio (FR) et CHATELET, Vincent (FR) (73) SCHLUMBERGER TECHNOLOGY B.V., Parkstraat 83, 2514 JG THE HAGUE (NL) (74) ALEMBONG OSWALD AMIN, S/C VON SEIDELS CAMEROON SARL, Suite 516 Commercial Bank Building, Quartier Intendance (adjacent Espace Landmark), B.P. 30188, YAOUNDE (CM). (57) A centralizer operable to connect with and centralize a downhole tool within a tubular string within a wellbore and to facilitate reception of electromagnetic signals transmitted through the Earth. The centralizer has a body, a first contacting member electrically connected to the body and extending radially away from the body such that the first contacting member contacts an inner surface of the tubular string to electrically connect the tubular string to the body, and a second contacting member electrically insulated from the body and extending radially away from the body such that the second contacting member contacts the inner surface of the tubular string to centralize at least a portion of the body within the tubular string.
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