US 11,910,144 B2
High temperature high pressure acoustic sensor design and packaging
Necmi Unsal, Lower Saxony (DE); and Tobias Colista, Lower Saxony (DE)
Assigned to BAKER HUGHES OILFIELD OPERATIONS LLC, Houston, TX (US)
Filed by Necmi Unsal, Lower Saxony (DE); and Tobias Colista, Lower Saxony (DE)
Filed on Jul. 22, 2022, as Appl. No. 17/871,043.
Claims priority of provisional application 63/224,543, filed on Jul. 22, 2021.
Prior Publication US 2023/0027469 A1, Jan. 26, 2023
Int. Cl. H04R 1/08 (2006.01); H04R 1/28 (2006.01); H04R 1/04 (2006.01); H04R 1/44 (2006.01)
CPC H04R 1/083 (2013.01) [H04R 1/04 (2013.01); H04R 1/2876 (2013.01); H04R 1/44 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An acoustic device for sensing or transmitting an acoustic signal at least partially traveling through a borehole fluid within a wellbore, the acoustic device comprising:
a compensation fluid;
an acoustic transducer at least partially disposed in the compensation fluid and configured to sense the acoustic signal; and
a metallic cover that separates the compensation fluid from the borehole fluid and configured to deform in response to a pressure difference between the borehole fluid and the compensation fluid, wherein the pressure difference is created by the acoustic signal and a hydrostatic pressure in the borehole fluid.