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US 12,234,696 B1Granted
Downhole robots with dissolvable fail-safe ballast
AssigneeSaudi Arabian Oil Company
InventorsHuseyin Rahmi Seren, Christopher Powell, Mohamed Larbi Zeghlache
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Abstract
An untethered device includes a tool and a ballast weight. The ballast weight includes an attachment plate that is securable to the tool, a dissolvable ballast, and attachment elements that secure the dissolvable ballast to the attachment plate. At least one of the attachment elements is dissolvable to release the dissolvable ballast from the attachment plate.
Claims20
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.
5 more elements
A method for logging a wellbore, the method comprising:
- dropping an untethered device in a downhole direction through the wellbore, the untethered device comprising:
- a tool, 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, dissolving an attachment element to release the dissolvable ballast from the attachment plate;
- and
- moving the tool in an uphole direction through the wellbore.
5 more elements
Dependencies are inferred from the claim text.