US 12,305,503 B2
Fluid sealing for downhole acoustic measurement tool
Zheng Li, Clamart (FR); Orland Guedes, Clamart (FR); Stephane Guimont, Clamart (FR); Viet Tung Nguyen, Clamart (FR); Roel Van Os, Clamart (FR); and Hiroshi Hori, Clamart (FR)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Sep. 4, 2023, as Appl. No. 18/460,635.
Prior Publication US 2025/0075615 A1, Mar. 6, 2025
Int. Cl. E21B 47/107 (2012.01); E21B 47/017 (2012.01); E21B 47/14 (2006.01)
CPC E21B 47/107 (2020.05) 15 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a downhole tool comprising an acoustic sensor operable for emitting and receiving acoustic signals to perform downhole measurements; and
a fluid seal assembly comprising:
a sleeve disposed circumferentially around the downhole tool, wherein the sleeve is sufficiently acoustically transparent to pass the emitted and received acoustic signals; and
a first fastener and a second fastener each extending circumferentially around the sleeve proximate respective first and second ends of the sleeve;
wherein the first and second fasteners comprise a shape-memory alloy such that, as a result of increased temperature, circumferences of the first and second fasteners decrease, thereby causing the first and second fasteners to apply a radially inward force to the sleeve to compress the sleeve against an outer surface of the downhole tool.