US 12,234,696 B1
Downhole robots with dissolvable fail-safe ballast
Huseyin Rahmi Seren, Houston, TX (US); Christopher Powell, Houston, TX (US); and Mohamed Larbi Zeghlache, Al Khobar (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Aug. 24, 2023, as Appl. No. 18/455,529.
Int. Cl. E21B 23/00 (2006.01); B63B 22/08 (2006.01); B63B 22/10 (2006.01)
CPC E21B 23/00 (2013.01) [B63B 22/08 (2013.01); B63B 22/10 (2013.01); E21B 2200/08 (2020.05)] 20 Claims
OG exemplary drawing
 
1. An untethered device comprising:
a tool;
at least one sensor for measuring one or more properties along a wellbore; and
a ballast weight comprising:
an attachment plate that is securable to the tool,
a dissolvable ballast, and
attachment elements that secure the dissolvable ballast to the attachment plate,
wherein at least one of the attachment elements is dissolvable to release the dissolvable ballast from the attachment plate.